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  description the accutek ak631024 sram module consists of fast high perfor - mance srams mounted on a low profile, 72 pin sim or zip pcb. the module utilizes four 32 pin 1 meg x 4 srams in 400 mil soj packages and four decoupling capacitor chips mounted on each 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 15nsec to 30nsec in cmos or bicmos technology. the accutek module is designed to have a maximum seated height of 0.670 inch sim or 0.550 inch zip to provide for the lowest height off the board. each conforms to jedec-standard sizes and pin-out configurations. using four pins for module memory density identifi - cation, pc 0 ,pd 1 ,pd 2 and pd 3 minimizes interchangeability and design considerations when changing from one module size to the other in customer applications. features 1,048,576 x 32 sram module in high density configuration jedec standardized 72 pin sim format common i/o, single oe functions with four separate chip selects (ce ) low height, 0.670 inch sim or 0.550 inch zip maximum presence detect pd 0 through pc 3 for identifying module density ttl compatible inputs and outputs single 5 volt power supply - AK6321024W, ak6321054z single 3.3 volt power supply - AK6321024W/3.3, ak6321024z/3.3 fast access times range from 15 nsec bicmos to 25 nsec power 170ma active (15ns) 165ma active (17ns) 160ma active (20ns) 155ma active (25ns) 10ma standby downward pin compatible with 512k x 32 (ak632512) - 72 pin sim or zip, and 256k x 32 (ak632256), 128k x 32 (ak632128), 64k x 32 (ak63264) and 32k x 32 (ak63232) - 64 pin sim or zip designs operating temperature range in free air, 0 0 cto70 0 c electrical specifications timing diagrams and basic electrical c haracteristics are those of the stan- dard 1 meg x 4 srams used to construct these modules. accutek?s module design allows the flexibility of selecting industry-compatible 1 meg x 4 srams from several semiconductor manufacturers. accutek microcircuit corporation AK6321024W / ak6321024z 1,048,576 x 32 bit cmos/bicmos static random access memory + + 1 36 37 72 1 36 37 72 72-pin sim 72-pin zip front view pin nomenclature a 0 -a 19 address inputs ce 1 -ce 4 chip enable dq 1 -dq 32 data in/data out oe output enable pd 0 -pd 3 presence detect vcc 5v supply vss ground we write enable nc no connect module options leadless sim: AK6321024W leades zip: ak6321024z leaded sip: ak6321024g pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1nc19a137ce 455 a5 2nc20a838ce 3 56 a12 3 pd2 21 a2 39 a17 57 vcc 4 pd3 22 a9 40 a16 58 a13 5 vss 23 dq13 41 oe 59 a6 6 pd0 24 dq5 42 vss 60 dq21 7 pd1 25 dq14 43 dq25 61 dq29 8 dq1 26 dq6 44 dq17 62 dq22 9 dq9 27 dq15 45 dq26 63 dq30 10 dq2 28 dq7 46 dq18 64 dq23 11 dq10 29 dq16 47 dq27 65 dq31 12 dq3 30 dq8 48 dq19 66 dq24 13 dq11 31 vss 49 dq28 67 dq32 14 dq4 32 we 50 dq20 68 vss 15 dq12 33 a15 51 a3 69 a18 16 vcc 34 a14 52 a10 70 a19 17 a0 35 ce 253 a4 71 nc 18 a7 36 ce 1 54 a11 72 nc pd 0 = vss pd 2 = vss pd 1 = open pd 3 = open 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 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 0.670 max 4.255 4.245 0.250 typ 0.050 typ c l c l c l 0.250 0.350 max 0.405 0.395 3.855 3.845 0.050 typ 0.050 typ c l c l c l 0.550 max .100 x .100 angle notch c l c l 0.350 max 0.100 typ 0.125 0.155 0.125 typ + + 1 3 5 2 4 6 64 62 60 63 61 59 top view zip 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: AK6321024W-15 1 meg x 32, 15 nsec sram module, sim configuration ak6321024z-17 1 meg x 32, 17 nsec sram module, zip configuration


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