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december 2000 advance information copyright ?2000 alliance semiconductor. all rights reserved. ? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 1 3.3v 256k 32/36 pipeline burst synchronous sram features ? organization: 262,144 words x 32 or 36 bits ? fast clock speeds to 166 mhz in lvttl/lvcmos ? fast clock to data access: 3.5/3.8/4.0/5.0 ns ? fast oe access time: 3.5/3.8/4.0/5.0 ns ? fully synchronous register-to-register operation ? single register ?flow-through? mode ? single-cycle deselect - dual-cycle deselect also available (as7c33256pfd32a/ as7c33256pfd36a) ? pentium? * compatible architecture and timing ? asynchronous output enable control ? economical 100-pin tqfp package ? byte write enables ? multiple chip enables for easy expansion ? 3.3 core power supply ? 2.5v or 3.3v i/o operation with separate v ddq ? 30 mw typical standby power in power down mode ? ntd? * pipeline architecture available (as7c33256ntd32a/ as7c33256ntd36a) logic block diagram q0 q1 256 k 32/36 memory array burst logic clk clr ce address d q ce clk dq d clk d q byte write registers register dq c clk d q byte write registers dq b clk d q byte write registers dq a clk d q byte write registers enable clk d q register enable clk d q delay register ce output registers input registers power down data [35:0] 4 36/32 17 15 17 18 gwe bwe bw d adv adsc adsp clk ce0 ce1 ce2 bw c bw b bw a oe a [17:0] zz lbo oe ft clk clk 36/32 data [31:0] pin arrangement dqp c /nc dq c dq c v ddq v ssq dq c dq c dq c dq c v ssq v ddq dq c dq c ft v dd nc v ss dq d dq d v ddq v ssq dq d dq d dq d dq d v ssq v ddq dq d dq d dqp d /nc 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 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 dqp b /nc dq b dq b v ddq v ssq dq b dq b dq b dq b v ssq v ddq dq b dq b v ss zz dq a dq a v ddq v ssq dq a dq a dq a dq a v ssq v ddq dq a dq a dqp a /nc l b o a 5 a 4 a 3 a 2 a 1 a 0 n c n c v s s v d d n c a 1 7 a 1 0 a 1 1 a 1 2 a 1 3 a 1 4 a 1 5 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0 1 0 0 9 9 9 8 9 7 9 6 9 5 9 4 9 3 9 2 9 1 9 0 8 9 8 8 8 7 8 6 8 5 8 4 8 3 8 2 8 1 a 6 a 7 c e 0 c e 1 b w d b w c b w b b w a c e 2 v d d v s s c l k g w e b w e o e a d s c a d s p a d v a 8 a 9 nc vdd a 1 6 note: pins 1,30,51,80 are nc for 32 tqfp 14 20 mm selection guide * pentium ? is a registered trademark of intel corporation. ntd? is a trademark of alliance semiconductor corporation. all trademarks menti oned in this document are the property of their respective owners. AS7C33256PFS32A ?166 AS7C33256PFS32A ?150 AS7C33256PFS32A ?133 AS7C33256PFS32A ?100 units minimum cycle time 6 6.7 7.5 10 ns maximum clock frequency 166.7 150 133.3 100 mhz maximum pipelined clock access time 3.5 3.8 4 5 ns maximum operating current 475 450 425 325 ma maximum standby current 130 110 100 90 ma maximum cmos standby current (dc) 30 30 30 30 ma
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 2 functional description the AS7C33256PFS32A and as7c33256pfs36a are high-performance cmos 8-mbit synchronous static random access memory (sram) devices organized as 262,144 words x 32 or 36 bits, and incorporate a two-stage register-register pipeline for highest frequency on any given technology. timing for these devices is compatible with existing pentium ? synchronous cache specifications. this architecture is suited for asic, dsp (tms320c6x), and powerpc ? * -based systems in computing, datacomm, instrumentation, and telecommunications systems. fast cycle times of 6/6.7/7.5/10 ns with clock access times (t cd ) of 3.5/3.8/4.0/5.0 ns enable 167, 150, 133 and 100 mhz bus frequencies. three chip enable ( ce ) inputs permit easy memory expansion. burst operation is initiated in one of two ways: the controller address strobe ( adsc ), or the processor address strobe ( adsp ). the burst advance pin ( adv ) allows subsequent internally generated burst addresses. read cycles are initiated with adsp (regardless of we and adsc ) using the new external address clocked into the on-chip address register when adsp is sampled low, the chip enables are sampled active, and the output buffer is enabled with oe . in a read operation the data accessed by the current address, registered in the address registers by the positive edge of clk, are carried to the data-out re gisters and driven on the output pins on the next positive edge of clk. adv is ignored on the clock edge that samples adsp asserted, but is sampled on all subsequent clock edges. address is incremented internally for the next access of the burst when adv is sampled low, and both address strobes are high. burst operation is selectable with the lbo input. with lbo unconnected or driven high, burst operations use a pentium ? count sequence. with lbo driven low, the device uses a linear count sequence suitable for powerpc ? and many other applications. write cycles are performed by disabling the output buffers with oe and asserting a write command. a global write enable gwe writes all 32/36bits regardless of the state of individual bw[a:d] inputs. alternately, when gwe is high, one or more bytes may be written by asserting bwe and the appropriate individual byte bwn signal(s). bwn is ignored on the clock edge that samples adsp low, but is sampled on all subsequent clock edges. output buffers are disabled when bwn is sampled low (regardless of oe ). data is clocked into the data input register when bwn is sampled low. address is incremented internally to the next burst address if bwn and adv are sampled low. read or write cycles may also be initiated with adsc instead of adsp . the differences between cycles initiated with adsc and adsp follow. ? adsp must be sampled high when adsc is sampled low to initiate a cycle with adsc . ? we signals are sampled on the clock edge that samples adsc low (and adsp high). ? master chip enable ce0 blocks adsp , but not adsc . AS7C33256PFS32A and as7c33256pfs36a family operates from a core 3.3v power supply. i/os use a separate power supply that can operate at 2.5v or 3.3v. these devices are available in a 100-pin 14 20 mm tqfp package. *powerpc ? is a tradenark international business machines corporation. capacitance write enable truth table (per byte) key: x = don?t care, l = low, h = high, t = true, f = false; *= valid read; n = a, b, c, d; we , wen = internal write signal. parameter symbol signals test conditions max unit input capacitance c in address and control pins v in = 0v 5 pf i/o capacitance c i/o i/o pins v in = v out = 0v 7 pf gwe bwe bwn wen l x x t h l l t h h x f* h l h f *
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 3 signal descriptions absolute maximum ratings 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 outside those indicated in the operational sections of this specification is not implied. exposure to absolute max- imum rating conditions may affect reliability. signal i/o properties description clk i clock clock. all inputs except oe , ft , zz, lbo are synchronous to this clock. a0?a17 i sync address. sampled when all chip enables are active and adsc or adsp are asserted. dq[a,b,c,d] i/o sync data. driven as output when the chip is enabled and oe is active. ce0 i sync master chip enable. sampled on clock edges when adsp or adsc is active. when ce0 is inactive, adsp is blocked. refer to the synchronous truth table for more information. ce1, ce2 i sync synchronous chip enables. active high and active low, respectively. sampled on clock edges when adsc is active or when ce0 and adsp are active. adsp i sync address strobe processor. asserted low to load a new bus address or to enter standby mode. adsc i sync address strobe controller. asserted low to load a new address or to enter standby mode. adv i sync advance. asserted low to continue burst read/write. gwe i sync global write enable. asserted low to write all 32/36 bits. when high, bwe and bw[a:d] control write enable. bwe i sync byte write enable. asserted low with gwe = high to enable effect of bw[a:d] inputs. bw[a,b,c,d] i sync write enables. used to control write of individual bytes when gwe = high and bwe = low. if any of bw[a:d] is active with gwe = high and bwe = low the cycle is a write cycle. if all bw[a:d] are inactive the cycle is a read cycle. oe i async asynchronous output enable. i/o pins are driven when oe is active and the chip is in read mode. lbo i static default = high count mode. when driven high, count sequence follows intel xor convention. when driven low, count sequence follows linear convention. this signal is internally pulled high. 18 ft i static flow-through mode.when low, enables single register flow-through mode. connect to v dd if unused or for pipelined operation. zz i async sleep. places device in low power mode; data is retained. connect to gnd if unused. parameter symbol min max unit power supply voltage relative to gnd v dd , v ddq ?0.5 +4.6 v input voltage relative to gnd (input pins) v in ?0.5 v dd + 0.5 v input voltage relative to gnd (i/o pins) v in ?0.5 v ddq + 0.5 v power dissipation p d ? 1.8 w dc output current i out ? 50 ma storage temperature (plastic) t stg ?65 +150 o c temperature under bias t bias ?65 +135 o c
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 4 synchronous truth table key: x = don?t care, l = low, h = high. 1 see ?write enable truth table?on page 2 for more information. 2 q in flow through mode. 3 for write operation following a read, oe must be high before the input data set up time and held high throughout the input hold time. recommended operating conditions ce0 ce1 ce2 adsp adsc adv wen 1 oe address accessed clk operation dq h x x x l x x x na l to h deselect hi - z l l x l x x x x na l to h deselect hi - z l l x h l x x x na l to h deselect hi - z l x h l x x x x na l to h deselect hi - z l x h h l x x x na l to h deselect hi - z l h l l x x x l external l to h begin read hi - z 2 l h l l x x x h external l to h begin read hi - z l h l h l x f l external l to h begin read hi - z 2 l h l h l x f h external l to h begin read hi - z x x x h h l f l next l to h cont. read q x x x h h l f h next l to h cont. read hi - z x x x h h h f l current l to h suspend read q x x x h h h f h current l to h suspend read hi - z h x x x h l f l next l to h cont. read q h x x x h l f h next l to h cont. read hi - z h x x x h h f l current l to h suspend read q h x x x h h f h current l to h suspend read hi - z l h l h l x t x external l to h begin write d 3 x x x h h l t x next l to h cont. write d h x x x h l t x next l to h cont. write d x x x h h h t x current l to h suspend write d h x x x h h t x current l to h suspend write d parameter symbol min nominal max unit supply voltage v dd 3.135 3.3 3.6 v v ss 0.0 0.0 0.0 3.3v i/o supply voltage v ddq 3.135 3.3 3.6 v v ssq 0.0 0.0 0.0 2.5v i/o supply voltage v ddq 2.35 2.5 2.9 v v ssq 0.0 0.0 0.0 input voltages ? address and control pins v ih 2.0 ? v dd + 0.3 v v il ?0.5 * ? 0.8 i/o pins v ih 2.0 ? v ddq + 0.3 v v il ?0.5 * ? 0.8 ambient operating temperature t a 0 ? 70 c
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 5 tqfp thermal resistance * this parameter is sampled. dc electrical characteristics dc electrical characteristics for 2.5v i/o operation * v il min = ?2.0v for pulse width less than 0.2 t rc . ? input voltage ranges apply to 3.3v i/o operation. for 2.5v i/o operation, contact factory for input specifications. description conditions symbol typical units thermal resistance (junction to ambient) * test conditions follow standard test methods and procedures for measuring thermal impedance, per eia/jesd51 1?layer q ja 40 c/w 4?layer q ja 22 c/w thermal resistance (junction to top of case) * q jc 8 c/w parameter symbol test conditions ?166 ?150 ?133 ?100 unit min max min max min max min max input leakage current * * lbo pin has an internal pull-up and input leakage = 10 m a. note: icc given with no output loading. icc increases with faster cycles times and greater output loading. |i li | v dd = max, v in = gnd to v dd ? 2 ? 2 ? 2 ? 2 a output leakage current |i lo | oe 3 v ih , v dd = max, v out = gnd to v dd ? 2 ? 2 ? 2 ? 2 a operating power supply current i cc ce0 = v il , ce1 = v ih , ce2 = v il , f = f max , i out = 0 ma ? 475 ? 450 ? 425 ? 325 ma standby power supply current i sb deselected, f = f max , zz v il ? 130 ? 110 ? 100 ? 90 ma i sb1 deselected, f = 0, zz 0.2v all v in 0.2v or 3 v dd ? 0.2v ? 30 ? 30 ? 30 ? 30 i sb2 deselected, f = f max , zz 3 v dd ? 0.2v all v in v il or 3 v ih ? 30 ? 30 ? 30 ? 30 output voltage v ol i ol = 8 ma, v ddq = 3.465v ? 0.4 ? 0.4 ? 0.4 ? 0.4 v v oh i oh = ?4 ma, v ddq = 3.135v 2.4 ? 2.4 ? 2.4 ? 2.4 ? parameter symbol test conditions ?166 ?150 ?133 ?100 unit min max min max min max min max output leakage current |i lo | oe 3 v ih , v dd = max, v out = gnd to v dd ?1 1 ?1 1 ?1 1 ?1 1 a output voltage v ol i ol = 2 ma, v ddq = 2.65v ? 0.7 ? 0.7 ? 0.7 ? 0.7 v v oh i oh = ?2 ma, v ddq = 2.35v 1.7 ? 1.7 ? 1.7 ? 1.7 ?
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 6 timing characteristics over operating range *see ? notes ? on page10. key to switching waveforms parameter symbol ?166 ?150 ?133 ?100 unit notes* min max min max min max min max clock frequency f max ? 166 ? 150 ? 133 ? 100 mhz cycle time (pipelined mode) t cyc 6 ? 6.6 ? 7.5 ? 10 ? ns cycle time (flow-through mode) t cycf 10 ? 10 ? 12 ? 12 ? ns clock access time (pipelined mode) t cd ? 3.5 ? 3.8 ? 4.0 ? 5.0 ns clock access time (flow-through mode) t cdf ? 9 ? 10 ? 10 ? 12 ns output enable low to data valid t oe ? 3.5 ? 3.8 ? 4.0 ? 5.0 ns clock high to output low z t lzc 0 ? 0 ? 0 ? 0 ? ns 2,3,4 data output invalid from clock high t oh 1.5 ? 1.5 ? 1.5 ? 1.5 ? ns 2 output enable low to output low z t lzoe 0 ? 0 ? 0 ? 0 ? ns 2,3,4 output enable high to output high z t hzoe ? 3.5 ? 3.8 ? 4.0 ? 4.5 ns 2,3,4 clock high to output high z t hzc ? 3.5 ? 3.8 ? 4.0 ? 5.0 ns 2,3,4 output enable high to invalid output t ohoe 0 ? 0 ? 0 ? 0 ? ns clock high pulse width t ch 2.4 ? 2.5 ? 2.5 ? 3.5 ? ns 5 clock low pulse width t cl 2.4 ? 2.5 ? 2.5 ? 3.5 ? ns 5 address setup to clock high t as 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6 data setup to clock high t ds 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6 write setup to clock high t ws 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6,7 chip select setup to clock high t css 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6,8 address hold from clock high t ah 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6 data hold from clock high t dh 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6 write hold from clock high t wh 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6,7 chip select hold from clock high t csh 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6,8 adv setup to clock high t advs 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6 adsp setup to clock high t adsps 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6 adsc setup to clock high t adscs 1.5 ? 1.5 ? 1.5 ? 2.0 ? ns 6 adv hold from clock high t advh 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6 adsp hold fromclock high t adsph 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6 adsc hold from clock high t adsch 0.5 ? 0.5 ? 0.5 ? 0.5 ? ns 6 undefined/don?t care falling input rising input
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 7 timing waveform of read cycle note: y = xor when mode = high/no connect; y = add when mode = low. bw[a:d] is don?t care. t cyc t ch t cl t adsps t adsph t as t ah t ws t advs t oh clk adsp adsc address gwe , bwe ce0 , ce2 adv oe d out t css t csh t hzc t cd t wh t advh t hzoe t adscs t adsch load new address adv inserts wait states q(a2y10) q(a2 y 11) q(a3) q(a2) q(a2 y 01) q(a3 y 01) q(a3 y 10) q(a1) a2 a1 a3 ce1 (pipelined mode) d out q(a2y10) q(a2y11) q(a3) q(a2 y 01) q(a3 y 01) q(a3 y 10) q(a3y11) q(a1) (flow-through mode) t hzc t oe t lzoe
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 8 timing waveform of write cycle note: y = xor when mode = high/no connect; y = add when mode = low. t cyc t cl t adsps t adsph t adscs t adsch t as t ah t ws t wh t css t advs t ds t dh clk adsp adsc address bwe ce0 , ce2 adv oe data in t csh t advh d(a2y01) d(a2y10) d(a3) d(a2) d(a2y01) d(a3y01) d(a3y10) d(a1) d(a2y11) adv suspends burst adsc loads new address a1 a2 a3 t ch ce1 bw[a:d]
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 9 timing waveform of read/write cycle note: y = xor when mode = high/no connect; y = add when mode = low. t ch t cyc t cl t adsps t adsph t as t ah t ws t wh t advs t ds t dh t oh clk adsp address gwe ce0 , ce2 adv oe d in d out t lzc t advh t lzoe t oe t cd q(a1) q(a3y01) d(a2) q(a3) q(a3y10) q(a3y11) a1 a2 a3 ce1 t hzoe (pipeline mode) d out q(a1) q(a3y01) q(a3y10) (flow-through mode) t cdf q(a3y11)
? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 10 ac test conditions notes 1 for test conditions, see ac test conditions , figures a, b, c. 2 this parameter measured with output load condition in figure c. 3 this parameter is sampled, but not 100% tested. 4 t hzoe is less than t lzoe ; and t hzc is less than t lzc at any given temperature and voltage. 5 tch measured as high above vih and tcl measured as low below vil. 6 this is a synchronous device. all addresses must meet the specified setup and hold times for all rising edges of clk. all other synchronous inputs must meet the setup and hold times for all rising edges of clk when chip is enabled. 7 write refers to gwe , bwe , bw[a:d]. 8 chip select refers to ce0 , ce1 , ce2 . 351 w 5 pf* 317 w d out gnd figure c: output load(b) *including scope and jig capacitance z 0 = 50 w d out 50 w figure b: output load (a) 30 pf* figure a: input waveform 10% 90% gnd 90% 10% +3.0v ? output load: see figure b, except for t lzc , t lzoe , t hzoe , t hzc , see figure c. ? input pulse level: gnd to 3v. see figure a. ? input rise and fall time (measured at 0.3v and 2.7v): 2 ns. see figure a. ? input and output timing reference levels: 1.5v. v l = 1.5v for 3.3v i/o; = v ddq /2 for 2.5v i/o thevenin equivalent: +3.3v for 3.3v i/o; +2.5v for 2.5v i/o package dimensions 100-pin quad flat pack (tqfp) dimensions in millimeters tqfp min max a1 0.05 0.15 a2 1.35 1.45 b 0.22 0.38 c 0.09 0.20 d 13.90 14.10 e 19.90 20.10 e 0.65 nominal hd 15.90 16.10 he 21.90 22.10 l 0.45 0.75 l1 1.00 nominal a 0 7 he e hd d b e a1 a2 l1 l c a
copyright ?2000 alliance semiconductor corporation (alliance)'s three-point logo, our name, and intelliwatt? are trademarks or r egistered trademarks of alliance. all other brand and product names may be the trademarks of their respective companies. alliance reserves the right to make changes to this web site and its products at any time without no tice. alliance assumes no responsibility for any errors that may appear in this web site. alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as expressly agreed to in alliance's terms and conditions of sale (available from al liance). all sales of alliance products are made exclusively according to alliance's terms and conditions of sale. the purchase of products from alliance does not convey a license under any patent rights, copyrights, mask works rights, t rademarks, or any other intellectual property rights of alliance or third parties. alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably b e expected to result in significant injury to the user, and the inclusion of alliance products in such life- supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify alliance against all claim s arising from such use. ? AS7C33256PFS32A as7c33256pfs36a 12/12/00 alliance semiconductor 11 ordering information part numbering guide 1.alliance semiconductor sram prefix 2.operating voltage: 33=3.3v 3.organization: 256 = 256 k 4.pipeline-flowthrough (each device works in both modes) 5.deselect: s=single cycle deselect 6.organization: 32=x32; 36=x36 7.production version: a=first production version 8.clock speed (mhz) 9.package type: tq=tqfp 10.operating temperature: c=commercial ( 0 c to 70 c); i=industrial ( -40 c to 85 c) ?166 mhz ?150 mhz ?133 mhz ?100 mhz AS7C33256PFS32A-166tqc AS7C33256PFS32A-150tqc AS7C33256PFS32A-133tqc AS7C33256PFS32A-100tqc AS7C33256PFS32A-166tqi AS7C33256PFS32A-150tqi AS7C33256PFS32A-133tqi AS7C33256PFS32A-100tqi as7c33256pfs36a-166tqc as7c33256pfs36a-150tqc as7c33256pfs36a-133tqc as7c33256pfs36a-100tqc as7c33256pfs36a-166tqi as7c33256pfs36a-150tqi as7c33256pfs36a-133tqi as7c33256pfs36a-100tqi as7c 33 256 pf s 32/36 a ?xxx tq c/i 1 2 3 4 5 6 7 8 9 10

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