description the accutek ak63264a sram module consists of fast high performance srams mounted on a low height, 64 pin sim or zip board. the module utilizes four 32 pin 64 k x 8 srams in 300 mil soj packages and four decoupling capacitors mounted on the front 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 12nsec to 35nsec in cmos or bicmos technology. the accutek module is designed to have a maximum seated height of 0.600 inch to provide for the lowest height off the board. each conforms to jedec-standard sizes and pin-out configurations. using two pins for module density identification, pd 0 and pd 1 , mini - mizes interchangeability and design considerations when changing from one module size to the other in customer applications. features 65,536 x 32 bit organization jedec standard 64 pin sim or zip format common i/o, single oe fucntions with four separate chip se- lects (ce ) low height, 0.600 inch maximum presence detect, pd 0 and pd 1 for identifying module density downard compatible with 32k x 32 (ak63232w) fast access to,es frp, 12nsec upward compatible with 128k x 32 (ak632128), 256k x 32 (ak632256),512k x 32 ( ak632512) and 1 meg x 32 (ak6321024) ttl-compatible inputs and outputs single 5 volt power supply - ak63264aw single 3.3 volt power supply - ak63264aw/3.3 operating temperature range in free air, 0 0 to 70 0 c electrical specifications timing diagrams and basic electrical characteristics are those of the standard 64k x 8 srams used to construct these modules. accutek?s module design allows the flexibility of selecting indus- try-compatible 64 k x 8 srams from several semiconductor manu- facturers. accutek microcircuit corporation ak63264aw 65,536 x 32 bit cmos/bicmos static random access memory pin nomenclature a 0 -a 15 address inputs ce 1 -ce 4 chip enable dq 1 -dq 32 data in/data out oe output enable pd 0 -pd 1 presence detect vcc power supply vss ground we write enable nc no connect module options leadless sim: ak63264aw pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 17 a2 33 ce4 49 a4 2 pd0 18 a9 34 ce3 50 a11 3 pd1 19 dq13 35 nc 51 a5 4 dq1 20 dq5 36 nc 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 dq21 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 ce2 47 a3 63 dq32 16 a8 32 ce1 48 a10 64 vss pd 0 = open pd 1 = vss functional diagram 1 32 33 64 front view
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 0.600 max 3.840 3.860 0.090 0.070 0.050 typ 0.250 0.200 max 0.425 0.375 .053 .047 .130 .120 c l c l c l c l accutek microcircuit corporation business center at newburyport 2 new pasture road, suite 1 newburyport, ma 01950-4054 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 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 the numbers and coding on this page do not include all variations available but are show as examples of the most widely used variations. contact accutek if other information is required. examples: ak63264aw-12 64k x 32, 12 nsec, sram module, sim configuration, low height
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