description the accutek ak5368192w high density memory module is a cmos dynamic ram organized in 8192k x 36 bit words. the mod - ule consists of sixteen standard 4 meg x 4 drams and eight 4 meg x 1 drams, each in plastic soj packages. the assembly has 14 drams mounted on the front side and 10 drams mounted on the back side of a printed circuit board in a 72 pad leadless sim configuration. this configuration allows socket-mounting of large quantities of memory in applications where high density and ease of inserting ad - ditional memory are important. the operation of the ak5368192w is identical to sixteen 4m x 4 plus eight 4m x 1 drams. there are four cas lines and four ras lines. on each bank of 4m x 36, independent byte control is accomplished by four cas lines. each separate cas line controls two 4m x 4 drams along with a 4m x 1 dram with data in tied to data out to form a 9 bit byte. two banks of 36 bits are controlled by the two pairs of ras lines. an eighteen bit data path can be produced by connect - ing dq 0 to dq 18 ,dq 1 to dq 19 , etc. and alternately strobing ras 0 with ras 1 and ras 2 with ras 3 . features 8,388,608 x 36 bit organization 72 pad single in-line module multiple cas and ras lines allow x18 or x36 bit widths cas -before-ras , ras -only or hidden refresh power 7.30 watt max active (60ns) 6.68 watt max active (70 ns) 252 mw max standby operating free air temperature 0 o cto70 o c single 5 volt power supply 2048 refresh cycles, 32 msec available in fast page mode and static column mode versions available in leadless (w) or leaded zip (z) versions downward compatible with ak5364096w through ak536256w sizes examples ak5368192wp-70 8meg x 36 cmos dynamic ram, sim, page mode, commercial 70 nsec access time additional options available 4 meg x 36 version, drams on one side only reference part no. ak5364096w4096 refresh cycles, 64 msec available for all module sizes accutek microcircuit corporation ak5368192w 8,388,608 by 36 bit cmos dynamic random access memory pin nomenclature dq 0 -dq 35 data in/data out a 0 -a 10 , 2k refresh address inputs a 0 -a 11 , 4k refresh address inputs cas 0 - cas 3 column address strobe ras 0 - ras 3 row address strobe we write enable pd 1 -pd 4 presence detect vcc 5v supply vss ground nc no connect module options leadless sim: ak5368192w leaded zip: ak5368192z pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 19 a10 37 dq17 55 dq12 2 dq0 20 dq4 38 dq35 56 dq30 3 dq18 21 dq22 39 vssv 57 dq13 4 dq1 22 dq5 40 cas 0 58 dq31 5 dq19 23 dq23 41 cas 2 59 vcc 6 dq2 24 dq6 42 cas 3 60 dq32 7 dq20 25 dq24 43 cas 1 61 dq14 8 dq3 26 dq7 44 ras 0 62 dq33 9 dq21 27 dq25 45 ras 1 63 dq15 10 vcc 28 a7 46 nc 64 dq34 11 nc 29 a11 47 we 65 dq16 12 a0 30 vcc 48 nc 66 nc 13 a1 31 a8 49 dq9 67 pd1 14 a2 32 a9 50 dq27 68 pd2 15 a3 33 ras 3 51 dq10 69 pd3 16 a4 34 ras 2 52 dq28 70 pd4 17 a5 35 dq26 53 dq11 71 nc 18 a6 36 dq8 54 dq29 72 vss presence detect - 8 meg x 36 4 meg x 36 -60 -70 -60 -70 pd1 nc nc vss vss pd2 vss vss nc nc pd3 nc vss nc vss pd4 nc nc nc nc 1 72
functional diagram mechanical dimensions order 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 = b y 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 the numbers and coding on this page do not include all variations avail - able, but are shown as examples of the most widely used variations. contact accutek if other information is required. position 12345678 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 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 responsibil - ity for the use of any circuitry described; no circuit patent licenses are implied. preliminary data sheets contain minimum and maxi - mum limits based upon design objectives, which are subject to change upon full characterization over the specific operating condi - tions. c l c l c l 1.250" max 0.330" max 0.425" 0.375" 0.250" c l 0.080" 0.125" 0.050" typ 4.250" 3.985" 1 72 *
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