256 mega bit cmos ddr sdram dpdd16mx16tsby5 ad vanced in for ma tion de scrip tion: the lp-stack ? series is a family of interchangeable memory devices. the 256 megabit double data rate synchronous dram is a member of this family which utilizes the new and innovative space saving tsop stacking technology. the devices are constructed with two 16 meg x 8 ddr sdram?s. the 256 megabit lp-stack ? modules dpdd16mx16tsby5, based on 128 megabit devices, has been designed to fit in the same footprint as the 16 meg x 8 ddr sdram tsop monolithic. this allows for system upgrade without electrical or mechanical redesign. providing an immediate and low cost memory solution. fea tures: ? configurations available: 16 meg x 16 (2 banks of 4 meg x 8 bits x 4) ? clock frequencies: 100, 125, 133, 143 mhz ? 2.5 volt dq supply ? jedec standard sstl _2 interface for all inputs/outputs ? four bank operation ? programmable burst type: burst length and read latency ? refresh: 4096 cycles/64ms ? refresh types: auto and self ? jedec approved footprint and pinout ? package: 66-pin leadless tsop stack 1 30a245-00 rev. a this document contains information on a product under consideration for development at dense-pac mi crosystems, inc. dense-pac reserves the right to change or discontinue information on this product without prior not ice. pin-out di a gram func tional block di a gram pin names a0 - a11 row address: a0 - a11 column address: a0 - a9 ba0,ba1 bank select address a10 / ap auto precharge dq0 - dq15 data in / data out cas column address strobe cs chip select ras row address strobe we data write enable ck , ck differential clock inputs cke0, cke1 clock enables dqs0, dqs1 data strobes dm0, dm1 data masks v dd power supply (+2.5v) v ss ground v ddq dq power supply (+2.5v) v ssq dq ground v ref reference voltage for inputs n.c. no connect nu not used
256 mega bit cmos ddr sdram dpdd16mx16tsby5 ad vanced in for ma tion 2 30a245-00 rev. a or dering in for ma tion me chan i cal drawing 7321 lincoln way, garden grove, california 92841-1431 ? (714) 898-0007 ? (800) 642-4477 ? fax: (714) 897-1772 ? http://www.dense-pac.com
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