description the accutek ak5322048bw high density memory module is a cmos dynamic ram organized in 2048k x 32 bit words. the mod - ule consists of four standard 1 meg x 16 bits drams in plastic soj packages. the assembly has two 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 ak5322048bw is identical to sixteen 1 meg x 4 drams. there are four cas lines and two ras lines. on each bank of 1m x 32, independent byte control is accomplished by four cas lines. each seperate cas line controls one byte of the 1 meg x 16 dram. features 2,097,152 x 32 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 or edo power: 3.96 watt max active (50ns) 3.52 watt max active (60 ns) 3.08 watt max active (70 ns) 44 mw max standby downward compatible with ak5321024w, ak532512w and ak532256w upward compatible with ak5324096w and ak5328192w additional options available 1 meg x 32 version, ak5321024b w 1 meg x 36 version, ak5361024bw 2 meg x 36 version, ak5362048bw accutek microcircuit corporation ak5322048bw 2,097,152 word by 32 bit cmos dynamic random access memory pin nomenclature a 0 -a 9 address inputs dq 0 -dq 35 data in/data out we 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: ak5322048bw pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 19 nc 37 nc 55 dq11 2 dq0 20 dq4 38 nc 56 dq27 3 dq16 21 dq20 39 vss 57 dq12 4 dq1 22 dq5 40 cas 0 58 dq28 5 dq17 23 dq21 41 cas 2 59 vcc 6 dq2 24 dq6 42 cas 3 60 dq29 7 dq18 25 dq22 43 cas 1 61 dq13 8 dq3 26 dq7 44 ras 0 62 dq30 9 dq19 27 dq23 45 ras 1 63 dq14 10 vcc 28 a7 46 nc 64 dq31 11 nc 29 nc 47 we 65 dq15 12 a0 30 vcc 48 nc 66 nc 13 a1 31 a8 49 dq8 67 pd1 14 a2 32 a9 50 dq24 68 pd1 15 a3 33 ras 3 51 dq9 69 pd3 16 a4 34 ras 2 52 dq25 70 pd4 17 a5 35 nc 53 dq10 71 nc 18 a6 36 nc 54 dq26 72 vss presence detect -50 -60 -70 pd1 nc nc nc pd2 vc nc nc pd3 vss nc vss pd4 vss nc nc + + 72 1 +
functional diagram mechanical dimensions 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" .125" dia tooling hole 0.330" max dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq16 dq17 dq18 dq19 dq20 dq21 dq22 dq23 dq24 dq25 dq26 dq27 dq28 dq29 dq30 dq31 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 implied. pre - liminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions.
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