description the accutek ak53220482w high density memory module is a cmos dynamic ram organized in 2048 x 32 bit words. the module consists of sixteen standard 1 meg x 4 drams in plastic soj pack - ages. the assembly has eight 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 ak5322048 is identical to sixteen 1meg x 4 drams. there are four cas lines and four ras lines. on each bank of 1meg x 32, independent byte control is accomplished by the four cas lines, where each seperate cas line controls two 1meg x 4 drams. two banks of 32 bits are controlled by the two pairs of ras lines. a sixteen bit data path can be produced by connecting dq 1 to dq 17 ,dq 2 to dq 18 , and alternately strobing ras 0 with ras 1 and ras 2 with ras 3 . features 2,097,152 x 32 bit organization 72 pad single in-line module multiple cas and ras lines allow x16 or x32 bit widths cas -before- ras , ras -only or hidden refresh operating free air temperature 0 o cto70 o c single 5 volt power supply 2048 refresh cycles available in fast page mode edo versions power 5.32 watt max active (60ns) 4.44 watt max active (70 ns) 3.79 watt max active (80 ns) 88 mw max standby available in leadless sim or leaded zip versions downward compatible with ak5321024, ak532512 and ak532256 upward compatible with ak5324096 and ak5328192 additional options available 256k x 32 version, ak532256 512k x 32 version, ak532512 1 meg x 32 version, ak5321024 4 meg x 32 version, ak5324096 8 meg x 32 version, ak5328192 accutek microcircuit corporation ak5322048w 2,097,152 word by 32 bit cmos dynamic random access memory pin nomenclature dq 0 -dq 31 data in/data out a 0 -a 9 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: ak5322048w leaded zip: ak5322048z 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 46 dq8 67 pd1 14 a2 32 a9 50 dq24 68 pd2 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 -1 meg x 32 presence detec t-2megx32 -60 -70 -80 -60 -70 -80 pd1 vss vss vss pd1 nc nc nc pd2 vss vss vss pd2 nc nc nc pd3 nc vss nc pd3 nc vss nc pd4 nc nc vss pd4 nc nc vss + + 72 1
functional diagram mechanical dimensions a0-a9 ras cas we oe a0-a9 ras cas we oe a0 - a9 ras cas we oe a0-a9 ras cas we oe a0 - a9 ras cas we oe dq0 - dq3 a0-a9 ras cas we oe dq0 - dq3 a0-a9 ras cas we oe dq0 - dq3 a0 - a9 ras cas we oe dq0 - dq3 cas0 cas2 ras0 dq0 - dq3 dq16 - dq19 dq4 - dq7 dq20 - dq23 ras1 ras3 ras2 a0-a9 ras cas we oe a0 - a9 ras cas we oe dq0 - dq3 dq0 - dq3 dq0 - dq3 dq0 - dq3 dq0 - dq3 dq0 - dq3 dq0 - dq3 dq0 - dq3 a0 - a9 ras cas we oe a0-a9 ras cas we oe a0 - a9 ras cas we oe dq0 - dq3 a0-a9 ras cas we oe dq0 - dq3 a0-a9 ras cas we oe dq0 - dq3 a0-a9 ras cas we oe dq0 - dq3 cas1 cas3 dq8 - dq11 dq24 - dq27 dq12 - dq15 dq28 - dq31 a0-a9 we 72 1 c l c l c l 1.000" max 0.330" max 0.425" 0.375" 0.250" c l 0.080" 0.125" 0.050" typ 4.250" 3.985" 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: accutek@seacoast.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.
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