description the accutek AK682048D high density memory module is a static random access memory organized in 2 meg x 8 bit words. the as - sembly consists of one medium speed 2 meg x 8 sram in a type 1 tsop package. the module is supplied in a 600 mil wide, 36 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 AK682048D is identical to standard monolithic 8 bit word wide srams. the AK682048D 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 ? 2,097,15 2 x 8 bit organization ? fast access time: 45 - 70 nsec ? completely static ram, no clock or timing strobe required ? inputs and outputs ttl compatible ? conventional 600 mil wide sip package with industry compatible pinout ? single 5 volt power supply - AK682048D ? single 3.3 volt power supply - AK682048D/3.3 ? operating free air temperature 0 0 to 70 0 c electrical specifications timing diagrams and basic electrical characteristics are those of the standard 2048 meg x 8 srams used to construct these mod- ules. accutek?s module design allows the flexibility of selecting in- dustry-compatible 2048 meg x 8 srams from any of a number of semiconductor manufacturers. accutek microcircuit corporation AK682048D 2,097,15 2 x 8 bit cmos static random access memory pin nomenclature dq 1 -dq 8 data in/data out a 0 -a 20 adress inputs ce 1 chip enable 1 ce 2 chip enable 2 we write enable vcc 5v supply vss ground oe output enable timing options 55 nsec access time 70 nsec access time pin assignment functional diagram
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 32 = 32k 1024 = 1 meg 64 = 64k 4096 = 4 meg 128 = 128k 8192 = 8 meg 256 = 256k 16384 = 16 meg 512 = 512k 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: AK682048D-70 2048 x 8, 70 nsec sram module, dip configuration
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