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1 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 8mb zbt ? sram features ? high frequency and 100 percent bus utilization fast cycle times: 6ns, 7.5ns and 10ns single +3.3v 5% power supply (v dd ) separate +3.3v or +2.5v isolated output buffer supply (v dd q) advanced control logic for minimum control signal interface individual byte write controls may be tied low single r/w# (read/write) control pin cke# pin to enable clock and suspend operations three chip enables for simple depth expansion clock-controlled and registered addresses, data i/os and control signals internally self-timed, fully coherent write internally self-timed, registered outputs to eliminate the need to control oe# snooze mode for reduced-power standby common data inputs and data outputs linear or interleaved burst modes burst feature (optional) pin/function compatibility with 2mb, 4mb, and 18mb zbt sram automatic power-down 100-pin tqfp package 165-pin fbga package 119-pin bga package options marking* timing (access/cycle/mhz) 3.5ns/6ns/166 mhz -6 4.2ns/7.5ns/133 mhz -7.5 5ns/10ns/100 mhz -10 configurations 3.3v i/o 512k x 18 mt55l512l18p 256k x 32 mt55l256l32p 256k x 36 mt55l256l36p 2.5v i/o 512k x 18 mt55l512v18p 256k x 32 mt55l256v32p 256k x 36 mt55l256v36p package 100-pin tqfp t 165-pin, 13mm x 15mm fbga f 119-pin, 14mm x 22mm bga b operating temperature range commercial (0oc to +70oc) none industrial (-40c to +85c)** it mt55l512l18p, mt55l512v18p, mt55l256l32p, mt55l256v32p, mt55l256l36p, mt55l256v36p 3.3v v dd , 3.3v or 2.5v i/o * a part marking guide for the fbga devices can be found on micron?s web site? http://www.micron.com/support/index.html. ** industrial temperature range offered in specific speed grades and confgurations. contact factory for more information. part number example: mt55l256l32pt-7.5 * a part marking guide for the fbga devices can be found on micron?s web site? http://www.micron.com/support/index.html. ** industrial temperature range offered in specific speed grades and confgurations. contact factory for more information. note: 1. jedec-standard ms-026 bha (lqfp). 2. jedec-standard ms-028 bha (pbga). 100-pin tqfp 1 119-pin bga 2 165-pin fbga (preliminary package data)
2 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 36 36 36 36 36 k mode 18 bwa# bwb# bwc# bwd# r/w# ce# ce2 ce2# oe# read logic dqs dqpa dqpb dqpc dqpd d a t a s t e e r i n g o u t p u t b u f f e r s 256k x 8 x 4 (x32) 256k x 9 x 4 (x36) memory array e e input register 0 address register 0 write address register 1 write address register 2 write registry and data coherency control logic 18 18 16 18 burst logic sa0' sa1' d1 d0 q1 q0 sa0 sa1 k 18 adv/ld# adv/ld# e input register 1 s e n s e a m p s o u t p u t r e g i s t e r s e clk cke# write drivers sa0, sa1, sa 36 36 36 note: functional block diagrams illustrate simplified device operation. see truth table, pin descriptions, and timing diagrams for detailed information. functional block diagram 256k x 32/36 functional block diagram 512k x 18 18 18 18 18 sa0, sa1, sa k mode 19 bwa# bwb# r/w# ce# ce2 ce2# oe# read logic dqs d a t a s t e e r i n g o u t p u t b u f f e r s 512k x 9 x 2 memory array e e input register 0 address register 0 write address register 1 write address register 2 write registry and data coherency control logic 19 19 17 19 burst logic sa0' sa1' d1 d0 q1 q0 sa0 sa1 k 19 adv/ld# adv/ld# e input register 1 s e n s e a m p s o u t p u t r e g i s t e r s e clk cke# write drivers 18 18 18 18 18
3 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram addresses can be internally generated as controlled by the burst advance pin (adv/ld#). use of burst mode is optional. it is allowable to give an address for each individual read and write cycle. burst cycles wrap around after the fourth access from a base address. to allow for continuous, 100 percent use of the data bus, the pipelined zbt sram uses a late late write cycle. for example, if a write cycle begins in clock cycle one, the address is present on rising edge one. byte writes need to be asserted on the same cycle as the address. the data associated with the address is required two cycles later, or on the rising edge of clock cycle three. address and write control are registered on-chip to simplify write cycles. this allows self-timed write cycles. individual byte enables allow individual bytes to be written. during a byte write cycle, bwa# controls dqa pins; bwb# controls dqb pins; bwc# controls dqc pins; and bwd# controls dqd pins. cycle types can only be defined when an address is loaded, i.e., when adv/ld# is low. parity/ecc bits are only available on the x36 version. micron?s 8mb zbt srams operate from a +3.3v v dd power supply, and all inputs and outputs are lvttl- compatible. users can choose either a 2.5v or 3.3v i/o version. the device is ideally suited for systems requir- ing high bandwidth and zero bus turnaround delays. please refer to micron?s web site ( www.micron.com/ datasheets ) for the latest data sheet. general description the micron ? zero bus turnaround ? (zbt ? ) sram family employs high-speed, low-power cmos designs using an advanced cmos process. micron?s 8mb zbt srams integrate a 512k x 18, 256k x 32, or 256k x 36 sram core with advanced synchronous peripheral circuitry and a 2-bit burst counter. these srams are optimized for 100 percent bus utilization, eliminating any turnaround cycles for read to write, or write to read, transitions. all synchronous inputs pass through registers controlled by a positive-edge-triggered single clock input (clk). the synchronous inputs include all addresses, all data inputs, chip enable (ce#), two additional chip enables for easy depth expansion (ce2, ce2#), cycle start input (adv/ld#), synchronous clock enable (cke#), byte write enables (bwa#, bwb#, bwc#, and bwd#), and read/write (r/w#). asynchronous inputs include the output enable (oe#, which may be tied low for control signal mini- mization), clock (clk), and snooze enable (zz, which may be tied low if unused). there is also a burst mode pin (mode) that selects between interleaved and linear burst modes. mode may be tied high, low, or left unconnected if burst is unused. the data-out (q), enabled by oe#, is registered by the rising edge of clk. write cycles can be from one to four bytes wide as controlled by the write control inputs. all read, write, and deselect cycles are initi- ated by the adv/ld# input. subsequent burst
4 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram pin # x18 x32 x36 51 nc nf dqpa 52 nc dqa dqa 53 nc dqa dqa 54 v dd q 55 v ss 56 nc dqa dqa 57 nc dqa dqa 58 dqa 59 dqa 60 v ss 61 v dd q 62 dqa 63 dqa 64 zz 65 v dd 66 v dd 1 67 v ss 68 dqa dqb dqb 69 dqa dqb dqb 70 v dd q 71 v ss 72 dqa dqb dqb 73 dqa dqb dqb 74 dqa dqb dqb 75 nc dqb dqb pin # x18 x32 x36 76 v ss 77 v dd q 78 nc dqb dqb 79 nc dqb dqb 80 sa nf dqpb 81 sa 82 sa 83 sa 84 nf 2 85 adv/ld# 86 oe# (g#) 87 cke# 88 r/w# 89 clk 90 v ss 91 v dd 92 ce2# 93 bwa# 94 bwb# 95 nc bwc# bwc# 96 nc bwd# bwd# 97 ce2 98 ce# 99 sa 100 sa pin # x18 x32 x36 tqfp pin assignment table 26 v ss 27 v dd q 28 nc dqd dqd 29 nc dqd dqd 30 nc nf dqpd 31 mode (lbo#) 32 sa 33 sa 34 sa 35 sa 36 sa1 37 sa0 38 dnu 39 dnu 40 v ss 41 v dd 42 dnu 43 dnu 44 sa 45 sa 46 sa 47 sa 48 sa 49 sa 50 sa pin # x18 x32 x36 1nc nf dqpc 2nc dqc dqc 3nc dqc dqc 4v dd q 5v ss 6nc dqc dqc 7nc dqc dqc 8 dqb dqc dqc 9 dqb dqc dqc 10 v ss 11 v dd q 12 dqb dqc dqc 13 dqb dqc dqc 14 v dd 15 v dd 16 v dd 1 17 v ss 18 dqb dqd dqd 19 dqb dqd dqd 20 v dd q 21 v ss 22 dqb dqd dqd 23 dqb dqd dqd 24 dqb dqd dqd 25 nc dqd dqd note: 1. pins 16 and 66 do not have to be connected directly to v dd if the input voltage is v ih . 2. pin 84 is reserved for expansion to 18mb device.
5 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram pin assignment (top view) 100-pin tqfp sa sa sa nf 2 adv/ld# oe# (g#) cke# r/w# clk v ss v dd ce2# bwa# bwb# nc nc ce2 ce# sa sa 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 sa nc nc v dd q v ss nc dqa dqa dqa v ss v dd q dqa dqa v ss v dd 1 v dd zz dqa dqa v dd q v ss dqa dqa nc nc v ss v dd q nc nc nc sa sa sa sa sa sa sa dnu dnu v dd v ss dnu dnu sa0 sa1 sa sa sa sa mode (lbo#) nc nc nc v dd q v ss nc nc dqb dqb v ss v dd q dqb dqb v dd v dd v dd 1 v ss dqb dqb v dd q v ss dqb dqb dqb nc v ss v dd q nc nc nc x18 sa sa sa nf 2 adv/ld# oe# (g#) cke# r/w# clk v ss v dd ce2# bwa# bwb# bwc# bwd# ce2 ce# sa sa 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 nf/ dqpb 3 dqb dqb v dd q v ss dqb dqb dqb dqb v ss v dd q dqb dqb v ss v dd 1 v dd zz dqa dqa v dd q v ss dqa dqa dqa dqa v ss v dd q dqa dqa nf/ dqpa 3 sa sa sa sa sa sa sa dnu dnu v dd v ss dnu dnu sa0 sa1 sa sa sa sa mode (lbo#) nf/ dqpc 3 dqc dqc v dd q v ss dqc dqc dqc dqc v ss v dd q dqc dqc v dd v dd v dd 1 v ss dqd dqd v dd q v ss dqd dqd dqd dqd v ss v dd q dqd dqd nf/ dqpd 3 x32/x36 note: 1. pins 16 and 66 do not have to be connected directly to v dd if the input voltage is v ih . 2. pin 84 is reserved for expansion to 18mb device. 3. nf for x32 version, dqpx for x36 version.
6 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram tqfp pin descriptions x18 x32/x36 symbol type description 37 37 sa0 input synchronous address inputs: these inputs are registered 36 36 sa1 and must meet the setup and hold times around the rising 32-35, 44-50, 32-35, 44-50, sa edge of clk. pin 84 is reserved as an address bit for 80-83, 99, 100 81-83, 99, 100 higher-density 18mb zbt srams. sa0 and sa1 are the two least significant bits (lsb) of the address field and set the internal burst counter if burst is desired. 93 93 bwa# input synchronous byte write enables: these active low inputs 94 94 bwb# allow individual bytes to be written when a write cycle is ? 95 bwc# active and must meet the setup and hold times around the ? 96 bwd# rising edge of clk. byte writes need to be asserted on the same cycle as the address. bws are associated with addresses and apply to subsequent data. bwa# controls dqa pins; bwb# controls dqb pins; bwc# controls dqc pins; bwd# controls dqd pins. 89 89 clk input clock: this signal registers the address, data, chip enables, byte write enables, and burst control inputs on its rising edge. all synchronous inputs must meet setup and hold times around the clock ? s rising edge. 98 98 ce# input synchronous chip enable: this active low input is used to enable the device and is sampled only when a new external address is loaded (adv/ld# is low). 92 92 ce2# input synchronous chip enable: this active low input is used to enable the device and is sampled only when a new external address is loaded (adv/ld# is low). this input can be used for memory depth expansion. 97 97 ce2 input synchronous chip enable: this active high input is used to enable the device and is sampled only when a new external address is loaded (adv/ld# is low). this input can be used for memory depth expansion. 86 86 oe# input output enable: this active low, asynchronous input (g#) enables the data i/o output drivers. g# is the jedec- standard term for oe#. 85 85 adv/ld# input synchronous address advance/load: when high, this input is used to advance the internal burst counter, controlling burst access after the external address is loaded. when adv/ld# is high, r/w# is ignored. a low on adv/ld# clocks a new address at the clk rising edge. 87 87 cke# input synchronous clock enable: this active low input permits clk to propagate throughout the device. when cke# is high, the device ignores the clk input and effectively internally extends the previous clk cycle. this input must meet setup and hold times around the rising edge of clk. 64 64 zz input snooze enable: this active high, asynchronous input causes the device to enter a low-power standby mode in which all data in the memory array is retained. when zz is active, all other inputs are ignored. (continued on next page)
7 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram tqfp pin descriptions (continued) x18 x32/x36 symbol type description 88 88 r/w# input read/write: this input determines the cycle type when adv/ld# is low and is the only means for determining reads and writes. read cycles may not be converted into writes (and vice versa) other than by loading a new address. a low on this pin permits byte write operations and must meet the setup and hold times around the rising edge of clk. full bus-width writes occur if all byte write enables are low. 31 31 mode input mode: this input selects the burst sequence. a low on (lbo#) this pin selects linear burst. nc or high on this pin selects interleaved burst. do not alter input state while device is operating. lbo# is the jedec-standard term for mode. (a) 58, 59, 62, 63, (a) 52, 53, 56-59, dqa input/ sram data i/os: byte ? a ? is associated with dqa pins; 68, 69, 72-74 62, 63 output byte ? b ? is associated with dqb pins; byte ? c ? is (b) 8, 9, 12, 13, (b) 68, 69, 72-75, dqb associated with dqc pins; byte ? d ? is associated with 18, 19, 22-24 78, 79 dqd pins. input data must meet setup and hold times (c) 2, 3, 6-9, dqc around the rising edge of clk. 12, 13 (d) 18, 19, 22-25, dqd 28, 29 n/a 51 nf/ dqpa nf/ no function /data bits: on the x32 version, these pins are 80 nf/ dqpb i/o no function (nf) and can be left floating or connected to 1 nf/ dqpc gnd to minimize thermal impedance. on the x36 version, 30 nf/ dqpd these bits are dqps. 14, 15, 16, 41, 65, 14, 15, 16, 41, 65, v dd supply power supply: see dc electrical characteristics and 66, 91 66, 91 operating conditions for range. 4, 11, 20, 27, 4, 11, 20, 27, v dd q supply isolated output buffer supply: see dc electrical 54, 61, 70, 77 54, 61, 70, 77 characteristics and operating conditions for range. 5, 10, 17, 21, 5, 10, 17, 21, v ss supply ground: gnd. 26, 40, 55, 60, 26, 40, 55, 60, 67, 71, 76, 90 67, 71, 76, 90 1-3, 6, 7, 25, n/a nc ? no connect: these pins can be left floating or connected 28-30, 51-53, 56, to gnd to minimize thermal impedance. 57, 75, 78, 79, 95, 96 38, 39, 42, 43 38, 39, 42, 43 dnu ? do not use: these signals may either be unconnected or wired to gnd to minimize thermal impedance. 84 84 nf ? no function: this pin is internally connected to the die and will have the capacitance of an input pin. it is allowable to leave this pin unconnected or driven by signals. pin 84 is reserved as an address pin for the 18mb zbt sram.
8 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram pin layout (top view) 165-pin fbga a b c d e f g h j k l m n p r a b c d e f g h j k l m n p r 2 ce# ce2 v dd q v dd q v dd q v dd q v dd q nc v dd q v dd q v dd q v dd q v dd q sa sa sa sa nc dqb dqb dqb dqb v dd nc nc nc nc nc nc nc nc nc nc nc nc nc nc v dd dqb dqb dqb dqb nf/ dqpb nc mode (lbo#) bwb# nc v ss v dd v dd v dd v dd v dd v dd v dd v dd v dd v ss sa sa nc bwa# v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss nc dnu dnu ce2# clk v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss nc sa1 sa0 cke# r/w# v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss v dd dnu dnu adv/l d# oe# (g#) v ss v dd v dd v dd v dd v dd v dd v dd v dd v dd v ss sa sa sa nc v dd q v dd q v dd q v dd q v dd q nc v dd q v dd q v dd q v dd q v dd q sa sa sa sa nc nc nc nc nc nc dqa dqa dqa dqa nc sa sa sa nc nf/ dqpa dqa dqa dqa dqa zz nc nc nc nc nc nc sa top view 3456789 10 11 1 a b c d e f g h j k l m n p r a b c d e f g h j k l m n p r 2 ce# ce2 v dd q v dd q v dd q v dd q v dd q nc v dd q v dd q v dd q v dd q v dd q sa sa sa sa nc dqc dqc dqc dqc v dd dqd dqd dqd dqd nc nc nc nc nc nf/ dqpc dqc dqc dqc dqc v dd dqd dqd dqd dqd nf/ dqpd nc mode (lbo#) bwc# bwd# v ss v dd v dd v dd v dd v dd v dd v dd v dd v dd v ss sa sa bwb# bwa# v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss nc dnu dnu ce2# clk v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss nc sa1 sa0 cke# r/w# v ss v ss v ss v ss v ss v ss v ss v ss v ss v ss v dd dnu dnu adv/ld# oe# (g#) v ss v dd v dd v dd v dd v dd v dd v dd v dd v dd v ss sa sa sa nc v dd q v dd q v dd q v dd q v dd q nc v dd q v dd q v dd q v dd q v dd q sa sa sa sa nc dqb dqb dqb dqb nc dqa dqa dqa dqa nc sa sa nc nc nf/ dqpb dqb dqb dqb dqb zz dqa dqa dqa dqa nf/ dqpa nc sa top view 3456789 10 11 1 x18 x32/x36 *no function (nf) is used on the x32 version. parity (dqpx) is used on the x36 version. note: pin 9b reserved for address pin expansion; 18mb.
9 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram fbga pin descriptions x18 x32/x36 symbol type description 6r 6r sa0 input synchronous address inputs: these inputs are registered and 6p 6p sa1 must meet the setup and hold times around the rising edge of 2a, 9a, 10a, 2a, 9a, 10a, sa clk. 11a, 2b, 10b, 2b, 10b, 3p, 4p, 8p, 3p, 4p, 8p, 9p, 10p, 3r, 9p, 10p, 3r, 4r, 8r, 9r, 4r, 8r, 9r, 10r, 11r 10r, 11r 5b 5b bwa# input synchronous byte write enables: these active low inputs allow 4a 5a bwb# individual bytes to be written and must meet the setup and hold ? 4a bwc# times around the rising edge of clk. a byte write enable is low ? 4b bwd# for a write cycle and high for a read cycle. for the x18 version, bwa# controls dqa ? s and dqpa; bwb# controls dqb ? s and dqpb. for the x32 and x36 versions, bwa# controls dqa ? s and dqpa; bwb# controls dqb ? s and dqpb; bwc# controls dqc ? s and dqpc; bwd# controls dqd ? s and dqpd. parity is only available on the x18 and x36 versions. 7a 7a cke# input synchronous clock enable: this active low input permits clk to propogate throughout the device. when cke# is high, the device ignores the clk input and effectively internally extends the previous clk cycle. this input must meet the setup and hold times around the rising edge of clk. 7b 7b r/w# input read/write: this input determines the cycle type when adv/ld# is low and is the only means for determining reads and writes. read cycles may not be converted into writes (and vice versa) other than by loading a new address. a low on this pin permits byte write operations to meet the setup and hold times around the rising edge of clk. full bus-width writes occur if all byte write enables are low. 6b 6b clk input clock: this signal registers the address, data, chip enable, byte write enables and burst control inputs on its rising edge. all synchronous inputs must meet setup and hold times around the clock ? s rising edge. 3a 3a ce# input synchronous chip enable: this active low input is used to enable the device. ce# is sampled only when a new external address is loaded. 6a 6a ce2# input synchronous chip enable: this active low input is used to enable the device and is sampled only when a new external address is loaded. 11h 11h zz input snooze enable: this active high, asynchronous input causes the device to enter a low-power standby mode in which all data in the memory array is retained. when zz is active, all other inputs are ignored. 3b 3b ce2 input synchronous chip enable: this active high input is used to enable the device and is sampled only when a new external address is loaded. (continued on next page)
10 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram x18 x32/x36 symbol type description 8b 8b oe# input output enable: this active low, asynchronous input enables the (g#) data i/o output drivers. 8a 8a adv/ld# input synchronous address advance/load: when high, this input is used to advance the internal burst counter, controlling burst access after the external address is loaded. when adv/ld# is high, r/w# is ignored. a low on adv/ld# clocks a new address at the clk rising edge. 1r 1r mode input mode: this input selects the burst sequence. a low on this input (lbo#) selects ? linear burst. ? nc or high on this input selects ? interleaved burst. ? do not alter input state while device is operating. (a) 10j, 10k, (a) 10j, 10k, dqa input/ sram data i/os: for the x18 version, byte ? a ? is associated with 10l, 10m, 11d 10l, 10m, 11j, output dqa ? s; byte ? b ? is associated with dqb ? s. for the x32 and x36 11e, 11f, 11g 11k, 11l, 11m versions, byte ? a ? is associated with dqa ? s; byte ? b ? is associated (b) 2d, 2e, 2f, (b) 10d, 10e, dqb with dqb ? s; byte ? c ? is associated with dqc ? s; byte ? d ? is associated 2g, 1j, 1k, 10f, 10g, 11d, with dqd ? s. input data must meet setup and hold times around the 1l, 1m 11e, 11f, 11g rising edge of clk. (c) 1d, 1e, 1f, dqc 1g, 2d, 2e, 2f, 2g, (d) 1j, 1k, 1l, dqd 1m, 2j, 2k, 2l, 2m 11c 11n nf/ dqpa nf/ no function/parity data i/os: on the x32 version, these are no 1n 11c nf/ dqpb i/o function(nf). on the x18 version, byte ? a ? parity is dqpa; byte ? b ? ? 1c nf/ dqpc parity is dqpb. on the x36 version, byte ? a ? parity is dqpa; byte ? 1n nf/ dqpd ? b ? parity is dqpb; byte ? c ? parity is dqpc; byte ? d ? parity is dqpd. 1h, 2h, 4d, 1h, 2h, 4d, v dd supply power supply: see dc electrical characteristics and operating 4e, 4f, 4g, 4h, 4e, 4f, 4g, 4h, conditions for range. 4j, 4k, 4l, 4m, 4j, 4k, 4l, 4m, 7n, 8d, 8e, 8f, 7n, 8d, 8e, 8f, 8g,8h, 8j, 8g,8h, 8j, 8k, 8l, 8m 8k, 8l, 8m 3c, 3d, 3e, 3f, 3c, 3d, 3e, 3f, v dd q supply isolated output buffer supply: see dc electrical characteristics and 3g, 3j, 3k, 3l, 3g, 3j, 3k, 3l, operating conditions for range. 3m, 3n, 9c, 3m, 3n, 9c, 9d, 9e, 9f, 9d, 9e, 9f, 9g, 9j, 9k, 9g, 9j, 9k, 9l, 9m, 9n 9l, 9m, 9n fbga pin descriptions (continued) (continued on next page)
11 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram x18 x32/x36 symbol type description 4c, 4n, 5c, 4c, 4n, 5c, v ss supply ground: gnd. 5d, 5e, 5f, 5g, 5d, 5e, 5f, 5g, 5h, 5j, 5k, 5l, 5h, 5j, 5k, 5l, 5m, 6c, 6d, 5m, 6c, 6d, 6e, 6f, 6g, 6h, 6e, 6f, 6g, 6h, 6j, 6k, 6l, 6m, 6j, 6k, 6l, 6m, 7c, 7d, 7e, 7f, 7c, 7d, 7e, 7f, 7g, 7h, 7j, 7k, 7g, 7h, 7j, 7k, 7l, 7m, 8c, 8n 7l, 7m, 8c, 8n 5p, 7p, 5r, 7r 5p, 7p, 5r, 7r dnu ? do not use: these signals may either be unconnected or wired to gnd to improve package heat dissipation. 1a, 1b, 1c, 1d, 1a, 1b, 1p, nc ? no connect: these signals are not internally connected and may be 1e, 1f, 1g, 2c, 2n, 2p, connected to ground to improve package heat dissipation. 1p, 2c, 2j, 2k, 2r, 3h, 5n, pin 9b is reserved for address pin expansion; 16mb. 2l, 2m, 2n, 6n, 9b, 9h, 2p, 2r, 3h, 4b, 10c, 10h, 10n, 5a, 5n, 6n, 11a, 11b, 11p 9b, 9h, 10c, 10d, 10e, 10f, 10g, 10h, 10n, 11b, 11j, 11k, 11l, 11m, 11n, 11p nf ? no function: these pins are internally connected to the die and have the capacitance of an input pin. it is allowable to leave these pins unconnected or driven by signals. fbga pin descriptions (continued)
12 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram pin layout (top view) 119-pin bga x18 x32/x36 note: 1. pin 4a is reserved for address expansion to 18mb. 2. no function (nf) is used on the x32 version. parity (dqpx) is used on the x36 version. 3. pin 3j, 5j, and 5r do not have to be connected directly to v dd if the input voltage is v ih . a b c d e f g h j k l m n p r t u 1 v dd q nc nc dqb nc v dd q nc dqb v dd q nc dqb v dd q dqb nc nc nc v dd q sa ce2 sa nc dqb nc dqb nc v dd dqb nc dqb nc dqpb sa sa dnu sa sa sa v ss v ss v ss bwb# v ss v dd 3 v ss v ss v ss v ss v ss mode (lbo#) sa dnu nf 1 adv/ld# v dd nc ce# oe# (g#) sa r/w# v dd clk nc cke# sa1 sa0 v dd nc dnu sa sa sa v ss v ss v ss v ss v ss v dd 3 v ss bwa# v ss v ss v ss v dd 3 sa dnu sa ce2# sa dqpa nc dqa nc dqa v dd nc dqa nc dqa nc sa sa nc v dd q nc nc nc dqa v dd q dqa nc v dd q dqa nc v dd q nc dqa nc zz v dd q top view 234567 a b c d e f g h j k l m n p r t u 1 v dd q nc nc dqc dqc v dd q dqc dqc v dd q dqd dqd v dd q dqd dqd nc nc v dd q sa ce2 sa nc/ dqpc 2 dqc dqc dqc dqc v dd dqd dqd dqd dqd nc/ dqpd 2 sa nc dnu sa sa sa v ss v ss v ss bwc# v ss v dd 3 v ss bwd# v ss v ss v ss mode (lbo#) sa dnu nf 1 adv/ld# v dd nc ce# oe# (g#) sa r/w# v dd clk nc cke# sa1 sa0 v dd sa dnu sa sa sa v ss v ss v ss bwb# v ss v dd 3 v ss bwa# v ss v ss v ss v dd 3 sa dnu sa ce2# sa nc/ dqpb 2 dqb dqb dqb dqb v dd dqa dqa dqa dqa nc/ dqpa 2 sa nc nc v dd q nc nc dqb dqb v dd q dqb dqb v dd q dqa dqa v dd q dqa dqa nc zz v dd q top view 234567
13 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram bga pin descriptions x18 x32/x36 symbol type description 4p 4p sa0 input synchronous address inputs: these inputs are registered and 4n 4n sa1 must meet the setup and hold times around the rising edge 2a, 3a, 5a, 2a, 2c, 2r, s a of clk. 6a, 3b, 5b, 3a, 3b, 3c, 2c, 3c, 5c, 3t, 4t, 5a, 6c, 2r, 6r, 5b, 5c, 5t, 2t, 3t, 5t, 6t 6a, 6c, 6r 5l 5l bwa# input synchronous byte write enables: these active low inputs allow 3g 5g bwb# individual bytes to be written and must meet the setup and hold ? 3g bwc# times around the rising edge of clk. a byte write enable is low ? 3l bwd# for a write cycle and high for a read cycle. for the x18 version, bwa# controls dqa ? s and dqpa; bwb# controls dqb ? s and dqpb. for the x32 and x36 versions, bwa# controls dqa ? s and dqpa; bwb# controls dqb ? s and dqpb; bwc# controls dqc ? s and dqpc; bwd# controls dqd ? s and dqpd. parity is only available on the x18 and x36 versions. 4m 4m cke# input synchronous clock enable: this active low input permits clk to propagate throughout the device. when cke# is high, the device ignores the ck input and effectively internally extends the previous clk cycle. this input must meet the setup and hold times around the rising edge of clk. 4h 4h r/w# input read/write: this input determines the cycle type when adv/ ld# is low and is the only means for determining reads and writes. read cycles may not be converted into writes (and vice versa) other than by loading a new address. a low on this pin permits byte write operations must meet the setup and hold times around the rising edge of clk. full bus-width writes occur if all byte write enables are low. 4k 4k clk input clock: this signal registers the address, data, chip enable, byte write enables and burst control inputs on its rising edge. all synchronous inputs must meet setup and hold times around the clock ? s rising edge. 4e 4e ce# input synchronous chip enable: this active low input is used to enable the device. ce# is sampled only when a new external address is loaded. 6 b 6 b ce2# input synchronous chip enable: this active low input is used to enable the device and is sampled only when a new external address is loaded. 7t 7t zz input snooze enable: this active high, asynchronous input causes the device to enter a low-power standby mode in which all data in the memory array is retained. when zz is active, all other inputs are ignored. 2b 2b ce2 input synchronous chip enable: this active high input is used to enable the device and is sampled only when a new external address is loaded. (continued on next page)
14 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram bga pin descriptions (continued) x18 x32/x36 symbol type description 4f 4f oe# input output enable: this active low, asynchronous input enables the data i/o output drivers. 4b 4b adv#/ld# input synchronous address advance/load: when high, this input is used to advance the internal burst counter, controlling burst access after the external addressis loaded. when adv#/ld# is high, r/w# is ignored. a low on adv#/ld# clocks a new address at the clk rising edge. 3r 3r mode input mode: this input selects the burst sequence. a low on this input selects ? linear burst. ? nc or high on this input selects ? interleaved burst. ? do not alter input state while device is operating. 4a 4a n f input no function: these pins are internally connected to the die and will have the capacitance of input pins. it is allowable to leave these pins unconnected or driven by signals. these pins are reserved for address expansion; 4a becomes an sa at 16mb density. (a) 6f, 6h, 6l, (a) 6k, 6l, dqa input/ sram data i/os: for the x18 version, byte ? a ? is dqa ? s; byte ? b ? 6n, 7e, 7g, 6m, 6n, 7k, output is dqb ? s. for the x32 and x36 versions, byte ? a ? is dqa ? s; 7k, 7p 7l, 7n, 7p byte ? b ? is dqb ? s; byte ? c ? is dqc ? s; byte ? d ? is dqd ? s. input (b) 1d, 1h, (b) 6e, 6f, d q b data must meet setup and hold times around the rising edge of 1l, 1n, 2e, 6g, 6h, 7d, clk. 2g, 2k, 2m 7e, 7g, 7h (c) 1d, 1e, dqc 1g, 1h, 2e, 2f, 2g, 2h (d) 1k, 1l, dqd 1n, 1p, 2k, 2l, 2m, 2n 6d 6p nf/ dqpa nf/ no function/parity data i/os: on the x32 version, these are no 2p 6d nf/ dqpb i/o function (nf). on the x18 version, byte ? a ? parity is dqpa; byte ? 2d nf/ dqpc ? b ? parity is dqpb. on the x36 version, byte ? a ? parity is dqpa; ? 2p nf/ dqpd byte ? b ? parity is dqpb; byte ? c ? parity is dqpc; byte ? d ? parity is dqpd. 2j, 4c, 4j, 2j, 4c, 4j, v dd supply power supply: see dc electrical characteristics and operating 4r, 5r, 6j 4r, 5r, 6j conditions for range. 1a, 1f, 1j, 1a, 1f, 1j, v dd q supply isolated output buffer supply: see dc electrical characteristics 1m, 1u, 7a, 1m, 1u, 7a, and operating conditions for range. 7f, 7j, 7m, 7f, 7j, 7m, 7u 7u (continued on next page)
15 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram x18 x32/x36 symbol type description 3d, 3e, 3f, 3d, 3e, 3f, v ss supply ground: gnd. 3h, 3k, 3l, 3h, 3k, 3m, 3m, 3n, 3p, 3n, 3p, 5d, 5d, 5e, 5f, 5e, 5f, 5h, 5g, 5h, 5k, 5k, 5m, 5n, 5m, 5n, 5p 5p 2u, 3u, 4u, 2u, 3u, 4u, dnu ? do not use: these signals may either be unconnected or wired 5u 5u to gnd to improve package heat dissipation. 1b, 1c, 1e, 1b, 1c, 1r, n c ? no connect: these signals are not internally connected and 1g, 1k, 1p, 1t, 2t, 3j, may be connected to ground to improve package heat 1r, 1t, 2d, 4d, 4l, 5j, dissipation. 2f, 2h, 2l, 6t, 6u, 7b, 2n, 3j, 4d, 7c, 7r 4l, 4t, 5j, 6e, 6g, 6k, 6m, 6p, 6u, 7b, 7c, 7d, 7h, 7l, 7n, 7r nf ? no function: these pins are internally connected to the die and have the capacitance of an input pin. it is allowable to leave these pins unconnected or driven by signals. bga pin descriptions (continued)
16 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram function r/w# bwa# bwb# bwc# bwd# read h x x x x write byte ? a ? llhhh write byte ? b ? lhlhh write byte ? c ? lhhlh write byte ? d ? l hhhl write all bytes lllll write abort/nop l h h h h interleaved burst address table (mode = nc or high) first address (external) second address (internal) third address (internal) fourth address (internal) x...x00 x...x01 x...x10 x...x11 x...x01 x...x00 x...x11 x...x10 x...x10 x...x11 x...x00 x...x01 x...x11 x...x10 x...x01 x...x00 linear burst address table (mode = low) first address (external) second address (internal) third address (internal) fourth address (internal) x...x00 x...x01 x...x10 x...x11 x...x01 x...x10 x...x11 x...x00 x...x10 x...x11 x...x00 x...x01 x...x11 x...x00 x...x01 x...x10 partial truth table for read/write commands (x32/x36) note: using r/w# and byte write(s), any one or more bytes may be written. function r/w# bwa# bwb# read h x x write byte ? a ? llh write byte ? b ? lhl write all bytes l l l write abort/nop l h h partial truth table for read/write commands (x18) note: using r/w# and byte write(s), any one or more bytes may be written.
17 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram state diagram for zbt sram deselect begin read burst read begin write ds ds ds burst write read ds write write burst read write read burst burst read burst ds write key: command ds read write burst operation deselect new read new write burst read, burst write or continue deselect burst read write note: 1. a stall or ignore clock edge cycle is not shown in the above diagram. this is because cke# high only blocks the clock (clk) input and does not change the state of the device. 2. states change on the rising edge of the clock (clk).
18 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram truth table (notes 5-10) address adv/ operation used ce# ce2# c e 2 z z l d # r/w# bwx oe# cke# clk d q notes deselect cycle none h x x l l x x x l l-h high-z deselect cycle none x h x l l x x x l l-h high-z deselect cycle none x x l l l x x x l l-h high-z continue deselect cycle none x x x l h x x x l l-h high-z 1 read cycle external l l h l l h x l l l-h q (begin burst) read cycle next x x x l h x x l l l-h q 1, 11 (continue burst) nop/dummy read external l l h l l h x h l l-h high-z 2 (begin burst) dummy read next x x x l h x x h l l-h high-z 1, 2, (continue burst) 11 write cycle external l l h l l l l x l l-h d 3 (begin burst) write cycle next x x x l h x l x l l-h d 1, 3, (continue burst) 11 nop/write abort none l l h l l l h x l l-h high-z 2, 3 (begin burst) write abort next x x x l h x h x l l-h high-z 1, 2, (continue burst) 3, 11 ignore clock edge c urrent x x x l x x x x h l-h ? 4 (stall) snooze mode none x x x h x x x x x x high-z note: 1. continue burst cycles, whether read or write, use the same control inputs. the type of cycle performed (read or write) is chosen in the initial begin burst cycle. a continue deselect cycle can only be entered if a deselect cycle is executed first. 2. dummy read and write abort cycles can be considered nops because the device performs no external operation. a write abort means a write command is given, but no operation is performed. 3. oe# may be wired low to minimize the number of control signals to the sram. the device will automatically turn off the output drivers during a write cycle. oe# may be used when the bus turn-on and turn-off times do not meet an application ? s requirements. 4. if an ignore clock edge command occurs during a read operation, the dq bus will remain active (low-z). if it occurs during a write cycle, the bus will remain in high-z. no write operations will be performed during the ignore clock edge cycle. 5. x means ? don ? t care. ? h means logic high. l means logic low. bwx = h means all byte write signals (bwa#, bwb#, bwc# and bwd#) are high. bwx = l means one or more byte write signals are low. 6. bwa# enables writes to byte ? a ? (dqa pins); bwb# enables writes to byte ? b ? (dqb pins); bwc# enables writes to byte ? c ? (dqc pins); bwd# enables writes to byte ? d ? (dqd pins). 7. all inputs except oe# and zz must meet setup and hold times around the rising edge (low to high) of clk. 8. wait states are inserted by setting cke# high. 9. this device contains circuitry that will ensure that the outputs will be in high-z during power-up. 10. the device incorporates a 2-bit burst counter. address wraps to the initial address every fourth burst cycle. 11. the address counter is incremented for all continue burst cycles.
19 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram absolute maximum ratings* voltage on v dd supply relative to v ss ................................... -0.5v to +4.6v voltage on v dd q supply relative to v ss ....................................... -0.5v to v dd v in -0.5v to v dd q + 0.5v storage temperature (plastic) .......... -55c to +150c storage temperature (fbga) .......... -55c to +125c junction temperature** .................................. +150c short circuit output current .......................... 100ma *stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only, and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. **junction temperature depends upon package type, cycle time, loading, ambient temperature, and airflow. see micron technical note tn-05-14 for more information. 3.3v i/o dc electrical characteristics and operating conditions (0 c t a +70 c; v dd , v dd q = +3.3v 0.165v unless otherwise noted) description conditions symbol min max units notes input high (logic 1) voltage v ih 2.0 v dd + 0.3 v 1, 2 input high (logic 1) voltage dq pins v ih 2.0 v dd + 0.3 v 1, 2 input low (logic 0) voltage v il -0.3 0.8 v 1, 2 input leakage current 0v v in v dd il i -1.0 1.0 a 3 output leakage current output(s) disabled, il o -1.0 1.0 a 0v v in v dd output high voltage i oh = -4.0ma v oh 2.4 ? v 1, 4 output low voltage i ol = 8.0ma v ol ? 0.4 v 1, 4 supply voltage v dd 3.135 3.465 v 1 isolated output buffer supply v dd q 3.135 v dd v 1, 5 note: 1. all voltages referenced to v ss (gnd). 2. overshoot: v ih +4.6v for t t khkh/2 for i 20ma undershoot: v il -0.7v for t t khkh/2 for i 20ma power-up: v ih +3.465v and v dd +3.135v for t 200ms 3. mode pin has an internal pull-up, and input leakage = 10a. 4. the load used for v oh , v ol testing is shown in figure 2. ac load current is higher than the shown dc values. ac i/o curves are available upon request. 5. v dd q should never exceed v dd . v dd and v dd q can be externally wired together to the same power supply.
20 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 2.5v i/o dc electrical characteristics and operating conditions (0 c t a +70 c; v dd = +3.3v 0.165v; v dd q = +2.5v +0.4v/-0.125v unless otherwise noted) description conditions symbol min max units notes input high (logic 1) voltage data bus (dqx) v ih q 1.7 v dd q + 0.3 v 1, 2 inputs v ih 1.7 v dd + 0.3 v 1, 2 input low (logic 0) voltage v il -0.3 0.7 v 1, 2 input leakage current 0v v in v dd il i -1.0 1.0 a 3 output leakage current output(s) disabled, il o -1.0 1.0 a 0v v in v dd q (dqx) output high voltage i oh = -2.0ma v oh 1.7 ? v1 i oh = -1.0ma v oh 2.0 ? v1 output low voltage i ol = 2.0ma v ol ? 0.7 v 1 i ol = 1.0ma v ol ? 0.4 v 1 supply voltage v dd 3.135 3.465 v 1 isolated output buffer supply v dd q 2.375 2.9 v 1 note: 1. all voltages referenced to v ss (gnd). 2. overshoot: v ih +4.6v for t t khkh/2 for i 20ma undershoot: v il -0.7v for t t khkh/2 for i 20ma power-up: v ih +3.465v and v dd +3.135v for t 200ms 3. mode pin has an internal pull-up, and input leakage = 10a. 4. this parameter is sampled. 5. preliminary package data. tqfp capacitance description conditions symbol typ max units notes control input capacitance t a = +25 c; f = 1 mhz c i 34pf4 input/output capacitance (dq) v dd = +3.3v c o 45pf4 address capacitance c a 3 3.5 pf 4 clock capacitance c ck 3 3.5 pf 4 fbga capacitance description conditions symbol typ max units notes address/control input capacitance c i 2.5 3.5 p f 4, 5 output capacitance (q) t a = 25 c; f = 1 mhz c o 4 5 p f 4, 5 clock capacitance c ck 2.5 3.5 p f 4, 5 bga capacitance description conditions symbol typ max units notes address/control input capacitance t a = +25 c; f = 1 mhz c i 47pf4 input/output capacitance (dq) v dd = 3.3v c o 4.5 5.5 pf 4 address capacitance c a 47pf4 clock capacitance c ck 4.5 5.5 pf 4
21 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram note: 1. v dd q = +3.3v 0.165v for 3.3v i/o configuration; v dd q = +2.5v +0.4v/-0.125v for 2.5v i/o configuration. 2. i dd is specified with no output current and increases with faster cycle times. i dd q increases with faster cycle times and greater output loading. 3. ? device deselected ? means device is in a deselected cycle as defined in the truth table. ? device selected ? means device is active (not in deselected mode). 4. typical values are measured at +3.3v, +25 c and 10ns cycle time. 5. this parameter is sampled. i dd operating conditions and maximum limits (note 1) (0 c t a +70 c; v dd = +3.3v 0.165v unless otherwise noted) description conditions symbol typ -6 -7.5 -10 units notes power supply device selected; all inputs v il current: operating or v ih ; cycle time t kc (min); i dd 200 500 400 300 m a 2, 3, 4 v dd = max; outputs open power supply device selected; v dd = max; current: idle cke# v ih ;i dd 1 10 25 25 20 ma 2, 3, 4 all inputs v ss + 0.2 or v dd - 0.2; cycle time t kc (min) cmos standby device deselected; v dd = max; all inputs v ss + 0.2 or v dd - 0.2; i sb 2 0.5 10 10 10 ma 3, 4 all inputs static; clk frequency = 0 ttl standby device deselected; v dd = max; all inputs v il or v ih ;i sb 3 6 252525ma3, 4 all inputs static; clk frequency = 0 clock running device deselected; v dd = max; adv/ld# v ih ; all inputs v ss + 0.2 i sb 4 45 120 75 60 ma 3, 4 or v dd - 0.2; cycle time t kc (min) snooze mode zz v ih i sb 2 z 0.5 10 10 10 ma 4 max tqfp thermal resistance description conditions symbol typ units notes thermal resistance test conditions follow standard test methods ja 40 c/w 5 (junction to ambient) and procedures for measuring thermal thermal resistance impedance, per eia/jesd51. jc 8 c/w 5 (junction to top of case) bga thermal resistance description conditions symbol typ units notes junction to ambient test conditions follow standard test methods ja 40 c/w 5 (airflow of 1m/s) and procedures for measuring thermal junction to case (top) impedance, per eia/jesd51. jc 9 c/w 5
22 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram note: 1. this parameter is sampled. 2. oe# can be considered a ? don ? t care ? during writes; however, controlling oe# can help fine-tune a system for turnaround timing. 3. test conditions as specified with output loading as shown in figure 1 for 3.3v i/o (v dd q = +3.3v 0.165v) and figure 3 for 2.5v i/o (v dd q = +2.5v +0.4v/-0.125v). 4. a write cycle is defined by r/w# low having been registered into the device at adv/ld# low. a read cycle is defined by r/w# high with adv/ld# low. both cases must meet setup and hold times. 5. measured as high above v ih and low below v il . 6. refer to technical note tn-55-01, ? designing with zbt srams, ? for a more thorough discussion on these parameters. 7. this parameter is sampled. 8. this parameter is measured with output loading as shown in figure 2 for 3.3v i/o and figure 4 for 2.5v i/o. 9. transition is measured 200mv from steady state voltage. 10. this is a synchronous device. all addresses must meet the specified setup and hold times for all rising edges of clk when they are being registered into the device. all other synchronous inputs must meet the setup and hold times with stable logic levels for all rising edges of clock (clk) when the chip is enabled. chip enable must be valid at each rising edge of clk when adv/ld# is low to remain enabled. 11. preliminary package data. ac electrical characteristics (notes 2, 3, 4) (0 c t a +70 c; v dd = +3.3v 0.165v unless otherwise noted) -6 -7.5 -10 description symbol min max min max min max units notes clock clock cycle time t khkh 6.0 7.5 10 ns clock frequency f kf 166 133 100 mhz clock high time t khkl 1.7 2.0 3.2 ns 5 clock low time t klkh 1.7 2.0 3.2 ns 5 output times clock to output valid t khqv 3.5 4.2 5.0 ns clock to output invalid t khqx 1.5 1.5 1.5 ns 6 clock to output in low-z t khqx1 1.5 1.5 1.5 ns 6, 7, 8, 9 clock to output in high-z t khqz 1.5 3.5 1.5 3.5 1.5 3.5 ns 6, 7, 8, 9 oe# to output valid t glqv 3.5 4.2 5.0 ns 2 oe# to output in low-z t glqx 0 0 0 ns 6, 7, 8, 9 oe# to output in high-z t ghqz 3.5 4.2 5.0 ns 6, 7, 8, 9 setup times address t avkh 1.5 1.7 2.0 ns 10 clock enable (cke#) t evkh 1.5 1.7 2.0 ns 10 control signals t cvkh 1.5 1.7 2.0 ns 10 data-in t dvkh 1.5 1.7 2.0 ns 10 hold times address t khax 0.5 0.5 0.5 ns 10 clock enable (cke#) t khex 0.5 0.5 0.5 ns 10 control signals t khcx 0.5 0.5 0.5 ns 10 data-in t khdx 0.5 0.5 0.5 ns 10 fbga thermal resistance description conditions symbol typ units notes junction to ambient test conditions follow standard test methods ja 40 c/w 1, 11 (airflow of 1m/s) and procedures for measuring thermal junction to case (top) impedance, per eia/jesd51. jc 9 c/w 1, 11 junction to pins (bottom) jb 17 c/w 1, 11
23 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram q 50 v = 1.5v z = 50 o t figure 1 q 351 317 5pf +3.3v figure 2 3.3v i/o ac test conditions input pulse levels ................................... v ss to 3.3v input rise and fall times ..................................... 1ns input timing reference levels .......................... 1.5v output reference levels ................................... 1.5v output load ............................. see figures 1 and 2 load derating curves the micron 512k x 18, 256k x 32, and 256k x 36 zbt sram timing is dependent upon the capacitive loading on the outputs. consult the factory for copies of i/o current versus voltage curves. q 50 ? v = 1.25v z = 50 ? o t figure 3 q 225 ? 225 ? 5pf +2.5v figure 4 2.5v i/o ac test conditions input pulse levels ................................... v ss to 2.5v input rise and fall times ..................................... 1ns input timing reference levels ........................ 1.25v output reference levels ................................. 1.25v output load ............................. see figures 3 and 4 3.3v i/o output load equivalents 2.5v i/o output load equivalents
24 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram snooze mode snooze mode is a low-current, ?power-down? mode in which the device is deselected and current is reduced to i sb 2 z . the duration of snooze mode is dictated by the length of time the zz pin is in a high state. after the device enters snooze mode, all inputs except zz become disabled and all outputs go to high-z. the zz pin is an asynchronous, active high input that causes the device to enter snooze mode. when the zz pin becomes a logic high, i sb 2 z is guaranteed after the time t zzi is met. any read or write opera- tion pending when the device enters snooze mode is not guaranteed to complete successfully. therefore, snooze mode must not be initiated until valid pend- ing operations are completed. similarly, when exiting snooze mode during t rzz, only a deselect or read cycle should be given. snooze mode electrical characteristics description conditions symbol min max units notes current during snooze mode zz v ih i sb 2z 10 ma zz active to input ignored t zz 0 2( t khkh) ns 1 zz inactive to input sampled t rzz 0 2( t khkh) ns 1 zz active to snooze current t zzi 2( t khkh) ns 1 zz inactive to exit snooze current t rzzi 0 ns 1 snooze mode waveform t zz i supply clk zz t rzz all inputs (except zz) don ? t care i isb2z t zzi t rzzi outputs (q) high-z deselect or read only note: 1. this parameter is sampled.
25 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram read/write timing write d(a1) 123 456789 clk t khkh t klkh t khkl 10 ce# t khcx t cvkh r/w# cke# t khex t evkh bwx# adv/ld# t khax t avkh address a1 a2 a3 a4 a5 a6 a7 t khdx t dvkh dq command t khqx1 d(a1) d(a2) d(a5) q(a4) q(a3) d(a2+1) t khqx t khqz t khqv write d(a2) burst write d(a2+1) read q(a3) read q(a4) burst read q(a4+1) write d(a5) read q(a6) write d(a7) deselect oe# t glqv t glqx t ghqz t khqx don ? t care undefined q(a6) q(a4+1) note: 1. for this waveform, zz is tied low. 2. burst sequence order is determined by mode (0 = linear, 1 = interleaved). burst operations are optional. 3. ce# represents three signals. when ce# = 0, it represents ce# = 0, ce2# = 0, ce2 = 1. 4. data coherency is provided for all possible operations. if a read is initiated, the most current data is used. the most recent data may be from the input data register. -6 -7.5 -10 sym min max min max min max units t ghqz 3.5 4.2 5.0 ns t avkh 1.5 1.7 2.0 ns t evkh 1.5 1.7 2.0 ns t cvkh 1.5 1.7 2.0 ns t dvkh 1.5 1.7 2.0 ns t khax 0.5 0.5 0.5 ns t khex 0.5 0.5 0.5 ns t khcx 0.5 0.5 0.5 ns t khdx 0.5 0.5 0.5 ns read/write timing parameters -6 -7.5 -10 sym min max min max min max units t khkh 6.0 7.5 10 ns f kf 166 133 100 mhz t khkl 1.7 2.0 3.2 ns t klkh 1.7 2.0 3.2 ns t khqv 3.5 4.2 5.0 ns t khqx 1.5 1.5 1.5 ns t khqx1 1.5 1.5 1.5 ns t khqz 1.5 3.5 1.5 3.5 1.5 3.5 ns t glqv 3.5 4.2 5.0 ns t glqx 0 0 0 ns
26 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram nop, stall, and deselect cycles read q(a3) 456 78910 clk ce# r/w# cke# bwx# adv/ld# address a3 a4 a5 d(a4) dq command a1 q(a5) write d(a4) stall write d(a1) 123 read q(a2) stall nop read q(a5) deselect continue deselect don ? t care undefined t khqz t khqx a2 d(a1) q(a2) q(a3) note: 1. the ignore clock edge or stall cycle (clock 3) illustrates cke# being used to create a ? pause. ? a write is not performed during this cycle. 2. for this waveform, zz and oe# are tied low. 3. ce# represents three signals. when ce# = 0, it represents ce# = 0, ce2# = 0, ce2 = 1. 4. data coherency is provided for all possible operations. if a read is initiated, the most current data is used. the most recent data may be from the input data register. nop, stall, and deselect timing parameters -6 -7.5 -10 sym min max min max min max units t khqx 1.5 1.5 1.5 ns t khqz 1.5 3.5 1.5 3.5 1.5 3.5 ns
27 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 100-pin plastic tqfp (jedec lqfp) 14.00 0.10 20.10 0.10 0.62 22.10 +0.10 -0.15 16.00 +0.20 -0.05 pin #1 id 0.65 1.50 0.10 0.25 0.60 0.15 1.40 0.05 0.32 +0.06 -0.10 0.15 +0.03 -0.02 0.10 +0.10 -0.05 detail a detail a 1.00 (typ) gage plane 0.10 note: 1. all dimensions in millimeters. 2. package width and length do not include mold protrusion; allowable mold protrusion is 0.25mm per side.
28 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 165-pin fbga note: 1. all dimensions in millimeters max or typical where noted. min 10.00 14.00 15.00 0.10 1.00 typ 1.00 typ 5.00 0.05 13.00 0.10 pin a1 id pin a1 id ball a1 mold compound: epoxy novolac substrate: plastic laminate 6.50 0.05 7.00 0.05 7.50 0.05 1.20 max solder ball material: eutectic 63% sn, 37% pb solder ball pad: ? .33mm solder ball diameter refers to post reflow condition. the pre-reflow diameter is ? 0.40 seating plane 0.85 0.075 0.12 c c 165x ? 0.45 ball a11
29 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram 8000 s. federal way, p.o. box 6, boise, id 83707-0006, tel: 208-368-3900 e-mail: prodmktg@micron.com, internet: http://www.micronsemi.com, customer comment line: 800-932-4992 micron is a registered trademark of micron technology, inc. zbt and zero bus turnaround are trademarks of integrated device technology, inc., and the architecture is supported by micron technology, inc., and motorola inc. ? 7.62 20.32 19.94 0.10 11.94 0.10 1.27 (typ) 1.27 (typ) 0.60 0.10 2.40 max 0.90 0.10 14.00 0.10 22.00 0.20 a1 corner a1 corner (dimension applies to a noncollapsed solder ball) substrate material: bt resin laminate 0.15 seating plane 0.75 0.15 note: 1. all dimensions in millimeters max or typical where noted. min 2. solder ball land pad is 0.6mm. 119-pin bga
30 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram micron technology, inc., reserves the right to change products or specifications without notice. mt55l512l18p_2.p65 ? rev. 6/01 ?2001, micron technology, inc. 8mb: 512k x 18, 256k x 32/36 pipelined zbt sram revision history removed note "not recommended for new designs," rev. 6/01 ................................................................ june 7/01 added industrial temperature references and notes, rev. 3/01 ................................................................ mar ch 19/01 changed 16mb references to 18mb changed nc/dqpx to nf/dqpx added 119-pin pbga package, rev. 1/01, final ................................................................................... ......... 1/10/01 removed fbga part marking guide, rev. 8/00, final .............................................................................. ...... 8/1/00 added fbga part marking guide, rev 7/00, final ................................................................................. ..... 7/20/00 added revision history removed 119-pin pbga package and references added 165-pin fbga package ..................................................................................................... ...................... 6/13/00 removed "smart zbt" references ................................................................................................. ...................... 6/13/00

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