description the accutek AK5362048BW high density memory module is a cmos dynamic ram organized in 2048k x 36 bit words. the mod - ule consists of four standard 1 meg x 16 bits drams and two 1 meg x 4 bit quad cas dram in plastic soj packages. the assembly has 3 drams mounted on each 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 AK5362048BW is identical to sixteen 1 meg x 4 plus eight 1 meg x 1 drams. there are four cas lines and two ras lines. on each bank of 1 meg x 36, independent byte control is ac - complished by four cas lines. each seperate cas line controls one byte of the 1 meg x 16 plus a parity bit in the quad cas dram. features 2,097,152 x 36 bit organization 72 pad single in-line module cas -before-ras , ras -only or hidden refresh operating free air temperature 0 o cto70 o c single 5 volt power supply 1024 refresh cycles, 16 msec available in fast page mode and edo power 2.125 watt max active (50ns) 1.975 watt max active (60 ns) 1.825 watt max active (70 ns) 30 mw max standby downward compatible with ak5361024w, ak536512w and ak536256w upward compatible with ak5364096w and ak5368192w additional options available 1 meg x 32 version, ak5321024bw 1 meg x 36 version, ak5361024bw 2 meg x 32 version, ak5322048bw accutek microcircuit corporation AK5362048BW 2,097,152 word by 36 bit cmos dynamic random access memory 72 1 pin nomenclature a 0 -a 9 address inputs dq 0 -dq 35 data in/data out w write enable ras 0 - ras 3 row address strobe cas 0 - cas 3 column address strobe pd 1 -pd 4 presence detect vss ground vcc 5v supply nc no connect module options leadless sim: AK5362048BW pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 19 nc 37 dq17 55 dq12 2 dq0 20 dq4 38 dq35 56 dq30 3 dq18 21 dq22 39 vss 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 nc 47 w 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 pd1 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 -50 -60 -70 pd1 nc nc nc pd2 nc nc nc pd3 vss nc vss pd4 vss nc nc
functional diagram mechanical dimensions 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. 72 1 .750" 0.400" 0.250" 0.080" c l c l c l c l 0.125" 0.050" typ 4.250" 3.985" 0.330" max .125" dia tooling hole ras3 ras2
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