description the accutek AK68128D1C high density memory module is a static random access memory organized in 128k x 8 bit words. the as - sembly consists of one medium speed 128k x 8 sram in a tsop type 1 package. the module is supplied in a 600 mil wide, 32 pin dip (dual in-line package) configuration. this pinout is completely compatible with industry standard monolithic designs. these mod - ules are intended for use in applications where limited board space dictates compact module designs. the operation of the ak68182d1c is identical to standard mono - lithic 8 bit word wide srams. the AK68128D1C offers the features of low power and medium speed by using cmos devices and makes high density mounting possible with no surface mount technology. features 131,07 2 x 8 bit organization fast access time: 35 - 70 nsec completely static ram, no clock or timing strobe required inputs and outputs ttl compatible conventional 600 mil wide dip package with industry compatible pinout single 5 volt power supply - AK68128D1C single 3.3 volt power supply - AK68128D1C/3.3 operating free air temperature 0 0 to 70 0 c rohs version available electrical specifications timing diagrams and basic electrical characteristics are those of the standard 128k x 8 srams used to construct these modules. accutek?s module design allows the flexibility of selecting indus- try-compatible 128k x 8 srams from any of a number of semicon- ductor manufacturers. accutek microcircuit corporation AK68128D1C 131,07 2 x 8 bit cmos static random access memory pin nomenclature dq 1 -dq 8 data in/data out a 0 -a 16 adress inputs ce chip enable we write enable vcc 5v or 3.3v supply vss ground oe output enable timing options 35 nsec access time 55 nsec access time 70 nsec access time pin assignment functional diagram pin 1 .22uf 1 128k x 8 sram nc a16 a14 a12 a7 a6 a5 a4 a3 a2 a1 a0 dq1 dq2 dq3 vss vcc a15 nc we a13 a8 a9 a11 oe a10 ce dq8 dq7 dq6 dq5 dq4 0.22uf capacitor nc a16 a14 a12 a7 a6 a5 a4 a3 a2 a1 a0 dq1 dq2 dq3 vss vcc a15 nc we a13 a8 a9 a11 oe a10 ce dq8 dq7 dq6 dq5 dq4
ordering information part number coding interpretation position 12345678 1 product ak = accutek memory 2 type 4 = dynamic ram 5 = cmos dynamic ram 6 = static ram 3 organization/word width 1 = by 1 16 = by 16 4 = by 4 32 = by 32 8 = by 8 36 = by 36 9 = by 9 4 size/bits depth 64 = 64k 4096 = 4 meg 256 = 256k 8192 = 8 meg 1024 = 1 meg 16384 = 16 meg 5 package type g = single in-line package (sip) s = single in-line module (sim) d = dual in-line package (dip) w = .050 inch pitch edge connect z = zig-zag in-line package (zip) 6 special designation p = page mode n = nibble mode k = static column mode w = write per bit mode v = video ram 7 separator - = commercial 0 0 cto+70 0 c m = military equivalent screened (-55 0 c to +125 0 c) i = industrial temperature tested (-45 0 cto+85 0 c) x = burned in 8 speed (first two significant digits) drams srams 50 = 50 ns 8 = 8 ns 60 = 60 ns 12 = 12 ns 70 = 70 ns 55 = 55 ns 80 = 80 ns 70 = 70 ns accutek microcircuit corporation 5 new pasture road newburyport, ma 01950-4040 phone: 978-465-6200 fax: 978-462-3396 email: sales@accutekmicro.com internet: www.accutekmicro.com accutek reserves the right to make changes in specifications at any time and without notice. accutek does not assume any responsibility for the use of any circuitry described; no circuit patent licenses are im - plied. preliminary data sheets cont ain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions. mechanical dimensions inches the numbers and coding on this page do not include all variations avail - able but are show as examples of the most widely used variations. contact accutek if other information is required. examples: AK68128D1C-35u 128k x 8, 35 nsec sram module, dip configuration, rohs 0.725" 0.315" 1.600" 0.125" 0.600" 0.100" 32 pin type 1 tsop 0.01968" (.5mm) 0.825" 1
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