description: the m-densus series is a family of interchangeable memory modules. the 64 megabit dram is a member of this family which utilizes the new and innovative space saving tsop technology. the modules are constructed with 8 meg x 8 dram?s available in 512, 256 and 128 megabits. the 64 megabit based m-densus modules have been designed to fit in the same footprint as the 8 meg x 8 dram tsop monolithic and are backward compatible with the 16 megabit based family of m-densus modules. this allows the memory board designer to upgrade the memory in their products without redesigning the memory board, thus saving time and money. features: configurations available: 512 megabit: 64 meg x 8 256 megabit: 32 meg x 8 128 megabit: 16 meg x 8 access times: 50, 60, 70ns (max.) 5.0v or 3.3v supply common data inputs and outputs edo or fast page mode capability 4096 cycles / 64 ms 3 variations of refresh: - ras only refresh - cas before ras refresh - hidden refresh package: leadless tsop module pin-out diagram * note: a12 on 8k refresh version, n.c. on 4k version. functional block diagram 64 meg based, 50 - 70ns, m-densus 30a179-00 c this document contains information on a product that is currently released to production at dense-pac microsystems, inc. dense-pac reserves the right to change products or specifications herein without prior notice. pin names a0 - a11 row address: a0 - a11 column address: a0 - a11 refresh address: a0 - a11 dq0 - dq7 data in / data out cas 0 - cas 7 column address strobes ras 0 - ras 7 row address enables we data write enable oe data output enable v dd power supply (+5v/3.3v) v ss ground n.c. no connect 512 megabit cmos dram 256 megabit cmos dram 128 megabit cmos dram m-densus high density memory device 30a179-00 rev. c 1
64 megabit dram based m-densus dense-pac microsystems, inc. mechanical drawing 512 megabit (64 meg x 8) dense-pac microsystems, inc. 7321 lincoln way garden grove , california 92841-1431 (714) 898-0007 (800) 642-4477 (outside ca) fax: (714) 897-1772 http://www.dense-pac.com ordering information 256 megabit (32 meg x 8) 128 megabit (16 meg x 8) 30a179-00 rev. c 2
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