is6mc256k integrated silicon solution, inc. sr004-1b-297 issi is6mc256k 256kb cmos 3.1 coast cache module preliminary for the intel pentium? cpu february 1997 this document contains preliminary data. issi reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. we assume no responsibility for any errors which may appear in this publication. ? copyright 1997, integrated silicon solution , inc. features ? low-cost, card-edge low-profile (celp) module with 160 leads ? for intel pentium cpu-based systems ? operates with pentium cpu clock speeds up to 66 mhz ? separate 5v and 3.3v power supplies ? multiple gnd pins and decoupling capacitors for maximum noise immunity ? cmos srams for low power ? conforms to intel coast specification description the issi is6mc256k is a secondary cache mod- ule designed for use with intel pentium cpu- based systems. this issi synchronous cache module uses is61c632 32k x 32 pipelined syn- chronous burst static rams which are mounted on a multilayer board. in addition, this module uses a single 5v 8-bit wide cmos sram for the tag. on-board logic, 3.3v data ram, and a 5v tag ram provide an exact interface between the module and the pc chipset. five pd (presence detect) input pins allow the system to determine the par- ticular cache configuration. issi 's celp 160-lead module provides space savings that allows the customer to design addi- tional functions into the system or to shrink the size of the motherboard. all inputs and outputs are ttl-compatible. mul- tiple gnd pins and on-board decoupling capaci- tors provide maximum protection from noise. is6mc256k functional block diagram 256kb pipelined burst module pd0 32k x 32 pipelined burst sram a17-a5 twe tio7-tio0 8k x 8 tag sram +5v 32k x 32 pipelined burst sram d7-d0 d15-d8 d23-d16 d31-d24 d39-d32 d47-d40 d55-d48 d63-d56 clk0 cwe4 cwe5 cwe6 ccs cwe0 cwe1 cwe2 coe adsp cads cadv gwe bwe +3.3v cwe7 cwe3 pd1 pd2 pd3 pd4 ecs1 ecs2 a3 a4 issi presence detect table pd4 pd3 pd2 pd1 pd0 module nc nc nc nc nc no cache present gnd nc gnd nc nc is6mc256k
is6mc256k 2 integrated silicon solution, inc. sr004-1b-297 issi 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 138 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 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 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 gnd tio1 tio7 tio5 tio3 nc vcc5 nc cadv gnd coe cwe5 cwe7 cwe1 vcc5 cwe3 nc nc gnd nc a4 a6 a8 a10 vcc5 a17 gnd a9 a14 a15 nc pd0 pd2 pd4 gnd clk0 gnd d63 vcc5 d61 d59 d57 gnd d55 d53 d51 d49 gnd d47 d45 d43 vcc5 d41 d39 d37 gnd d35 d33 d31 vcc5 d29 d27 d25 gnd d23 d21 d19 vcc5 d17 d15 d13 gnd d11 d9 d7 vcc5 d5 d3 d1 gnd gnd tio0 tio2 tio6 tio4 nc vcc3 twe cads gnd cwe4 cwe6 cwe0 cwe2 vcc3 ccs gwe bwe gnd a3 a7 a5 a11 a16 vcc3 nc gnd a12 a13 adsp esc1 esc2 pd1 pd3 gnd nc gnd d62 vcc3 d60 d58 d56 gnd d54 d52 d50 d48 gnd d46 d44 d42 vcc3 d40 d38 d36 gnd d34 d32 d30 vcc3 d28 d26 d24 gnd d22 d20 d18 vcc3 d16 d14 d12 gnd d10 d8 d6 vcc3 d4 d2 d0 gnd top view of connector (burndy celp 2x80sc) pin configuration pin descriptions a17-a3 address inputs a17-a5 tag address inputs clk0 clock input d63-d0 cache data inputs/outputs tio7-tio0 tag inputs/outputs pd0-pd4 presence detect pins coe cache data output enable input twe tag write enable input cwe 7- cwe 0 cache data write enable input ccs cache data chip enable input cads cache address status input adsp processor address status input cadv burst address advance gwe global write input bwe byte write enable input ecs 1 expansion chip select input ecs 2 expansion chip select output
is6mc256k integrated silicon solution, inc. sr004-1b-297 issi absolute maximum ratings (1) symbol parameter value unit v cc 5 power supply voltage C0.5 to vcc + 0.5 v with respect to gnd v cc 3 power supply voltage C0.5 to vcc + 0.3 v with respect to gnd t bias temperature under bias C10 to +85 c t stg storage temperature C55 to +125 c t a operating temperature 0 to +70 c i out dc output current (low) 100 ma notes: 1. stress 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. operating range (t a = 0 c to +70 c) symbol parameter range v cc 3 3.3v supply voltage 3.3v +10%, C5% v cc 5 5.0v supply voltage 5.0v 10% dc electrical characteristics (over operating range) symbol parameter test conditions min. max. unit v oh output high voltage i oh = C5.0 ma 2.4 v v ol output low voltage i ol = 5.0 ma 0.4 v v ih input high voltage 2.2 v cc + 0.3 v v il input low voltage C0.3 0.8 v i li input leakage current gnd v in v cc C20 20 m a i lo output leakage current gnd v out v cc , oe = v ih C10 10 m a power supply characteristics (over operating range) symbol parameter test conditions min. max. unit i cc 3 3.3v supply current v cc 3 = max., cs v il 400 ma f = f max , outputs open i cc 5 5.0v supply current v cc 5 = max., cs v il 150 ma f = f max , outputs open i sb 3 standby 3.3v power v cc 3 = max., cs 3 v cc C 0.2v tbd supply current v in 0.2v or v in 3 v cc C 0.2v, f = 0, outputs open i sb 5 standby 5.0v power v cc 5 = max., cs 3 v cc C 0.2v tbd supply current v in 0.2v or v in 3 v cc C 0.2v, f = 0, outputs open
is6mc256k 4 integrated silicon solution, inc. sr004-1b-297 issi module dimensions 256kb pipelined burst module 2.150 2.170 4.330 4.350 1.120 1.140 pin 81 front view 0.072 0.076 0.150 0.040 0.060 2 x r 0.050 typ. pin 1 0.100 0.120 back view 0.215 max. 0.055 0.069 1.950 1.970 side view 3 x 0.295 min. note: component placement for illustrative purposes only. ordering information density (kbytes) speed (mhz) order part number 256 50 IS6MC256K-50 256 60 is6mc256k-60 256 66 is6mc256k-66 integrated silicon solution, inc. 2231 lawson lane santa clara, ca 95054 fax: (408) 588-0806 toll free: 1-800-379-4774 http://www.issiusa.com issi
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