description the accutek ak63264 sram module consists of fast high perfor - mance srams mounted on a low profile, 64 pin sim or zip board. the module utilizes eight 28 pin 64 k x 4 srams in soj packages and four decoupling capacitors 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 12 nsec to 45 nsec in cmos or bicmos technology. the accutek module is designed to have a maximum seated height of 0.600 inch sim or 0.500 inch zip to provide for the lowest height off the board. by offset-mounting the back surface srams on the sim version the module can be mounted in either angled or straight-up sim sockets. each conforms to jedec - standard sizes and pin-out configurations. using two pins for module memory den - sity identification, pd 0 and pd 1 , minimizes 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 functions with four separate chip selects (ce ) low height, 0.600 inch sim or 0.500 inch zip maximum upward compatible with 128k x 32 (ak632128), 256k x 32 (ak632256) and 1 meg x 32 (ak6321024) designs presence detect, pd 0 and pd 1 for identifying module density fast access times range from 12 nsec bicmos to 45 nsec cmos ttl-compatible inputs and outputs single 5 volt power supply - ak63264w, AK63264Z single 3.3 volt power supply - ak63264w/3.3, AK63264Z/3.3 operating temperature range in free air, 0 0 cto70 0 c electrical specifications timing diagrams and basic electrical characteristics are those of the standard 64 k x 4 srams used to construct these modules. accutek?s module design allows the flexibility of selecting indus- try-compatible 64 k x 4 srams from at least seven semiconductor manufacturers. accutek microcircuit corporation ak63264w/AK63264Z 65,536 x 32 bit cmos/bicmos static random access memory 1 32 33 64 1323364 64-pin zip 64-pin sim front view 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 module options leadless sim: ak63264w leaded sip: ak63264g leaded zip: AK63264Z pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 17 a 2 33 ce 4 49 a 4 2pd 0 18 a 9 34 ce 3 50 a 11 3pd 1 19 dq 13 35 nc 51 a 5 4dq 1 20 dq 5 36 nc 52 a 12 5dq 9 21 dq 14 37 oe 53 vcc 6dq 2 22 dq 6 38 vss 54 a 13 7dq 10 23 dq 15 39 dq 25 55 a 6 8dq 3 24 dq 7 40 dq 17 56 dq 21 9dq 11 25 dq 16 41 dq 26 57 dq 29 10 dq 4 26 dq 8 42 dq 18 58 dq 22 11 dq 12 27 vss 43 dq 27 59 dq 30 12 vcc 28 we 44 dq 19 60 dq 23 13 a 0 29 a 15 45 dq 28 61 dq 31 14 a 7 30 a 14 46 dq 20 62 dq 24 15 a 1 31 ce 2 47 a 3 63 dq 32 16 a 8 32 ce 1 48 a 10 64 vss pd 0 = open pd 1 = vss 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 60 = 60 ns 8 = 8 ns 70 = 70 ns 12 = 12 ns 80 = 80 ns 15 = 15 ns 3.840 3.860 3.585 0.050 typ 0.125 typ c l c l c l c l 1 0.600 max 0.350 max .250 3.590 3.610 0.120 0.130 0.050 typ 0.100 typ c l c c l l c c l l 1 0.500 max 0.125 0.155 c l c l 0.350 max 0.100 typ .050 x .050 angle notch 0.090 0.070 64 64 1 3 5 2 4 6 64 62 60 63 61 59 top view zip examples: ak63264w-15 64k x 32, 15 nsec sram module, sim configuration AK63264Z-12 64k x 32, 12 nsec sram module, zip configuration 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 shown as examples of the most widely used ariations. contact accutek if other information is required.
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