description the accutek AK632512AW sram module consists of fast high per - formance srams mounted on a low height, 64 pin sim board. the module utilizes four 36 pin 512k x 8 srams in 400 mil soj pack - ages and four decoupling capacitors mounted two on the front side and two on the back side of a printed circuit board. the srams used have common i/o functions and single output en - able functions. also, four separate chip select (ce ) connections are used to independently enable the four bytes. the modules can be supplied in a variety of access time values from 15 nsec to 35 nsec in cmos or bicmos technology. the accutek module is designed to have a maximum seated height of 0.640 inch sim to provide for the lowest height off the board. the module conforms to jedec-standard size. the presence detect feature has been disabled on this 64 pin module. the customer must jumper his board to provide density identification. the avail - able 72 pin module has the presence detect feature operational. features 524,288 x 32 bit organization similar to jedec standard 64 pin sim format except that a 18 replaces pd 1 on pin #3 common i/o, single oe and we functions with four separate chip selects (ce ) fast access times from 15 nsec low height, 0.640 inch sim maximum power: 720ma max active (20 nsec) 760ma max active (15 nsec) 800ma max active (12 nsec) 200ma max standby presence detect, pd 0 is open for identifying module density downward compatible with 256k x 32 (ak632256), 128k x 32 (ak632128), 64k x 32 (ak63264) and 32k x 32 (ak63232), 64 pin sim or zip designs upward compatible with 1 meg x 32 (ak6321024) ttl-compatible inputs and outputs single 5 volt power supply - AK632512AW single 3.3 volt power supply - AK632512AW/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 512 k x 8 srams used to construct these modules. accutek?s module design allows the flexibility of selecting indus- try-compatible 512 k x 8 srams from several sram manufacturers. accutek microcircuit corporation AK632512AW - 64 pin version 524,288 x 32 bit cmos / bicmos static random access memory 1 32 33 64 front view back view 64 33 32 1 pin nomenclature a 0 -a 18 address inputs ce 1 -ce 4 chip enable dq 1 -dq 32 data in/data out oe output enable pd 0 presence detect vcc 5v supply vss ground we write enable module options leadless sim: AK632512AW pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 17 a2 33 ce 449 a4 2 pd0 18 a9 34 ce 3 50 a11 3 a18 19 dq13 35 a 17 51 a5 4 dq1 20 dq5 36 a 16 52 a12 5 dq9 21 dq14 37 oe 53 vcc 6 dq2 22 dq6 38 vss 54 a13 7 dq10 23 dq15 39 dq25 55 a6 8 dq3 24 dq7 40 dq17 56 d21 9 dq11 25 dq16 41 dq26 57 dq29 10 dq4 26 dq8 42 dq18 58 dq22 11 dq12 27 vss 43 dq27 59 dq30 12 vcc 28 we 44 dq19 60 dq23 13 a0 29 a15 45 dq28 61 dq31 14 a7 30 a14 46 dq20 62 dq24 15 a1 31 ce 2 47 a3 63 dq32 16 a8 32 ce 1 48 a10 64 vss pd 0 = open functional diagram a0 - a18 a0 - a18 a0 - a18 a0 - a168 we we we we dq1 - dq8 dq1 - dq8 dq1 - dq8 dq1 - dq8 oe oe oe oe ce ce ce ce + + + + dq1 - dq8 dq9 - dq16 dq17 - dq24 dq25 - dq32 + a0 - a18 19 + * * * * + * * * * + + + + * * * * we oe ce1 ce2 ce3 ce4
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 10 = 10 ns 70 = 70 ns 12 = 12 ns 80 = 80 ns 15 = 15 ns the numbers and coding on this page do not include all variations available but are shown as examples of the most widely used variations. contact accutek if other information is required. 0.640 max 3.845 3.855 0.250 0.080 typ c l 0.300 max 0.405 0.395 0.050 typ c l c l 0.130 0.120 accutek microcircuit corporation business center at newburyport 2 new pasture road, suite 1 newburyport, ma 01950-4054 voice: 978-465-6200 fax: 978-462-3396 email: sales@accutekmicro.com internet: www.accutekmicro.com examples: AK632512AW-15 512k x 32, 15 nsec sram module, sim configuration, 64 pin 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 implied. preliminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions. mechanical dimensions inches
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