description: this document describes valueram's 32m x 64-bit (256mb) cl2.5 ddr400 sdram ( s ynchronous dram ) memory module. the components on this module include eight 32m x 8-bit (8m x 8-bit x 4 bank / 200mhz, 5.0ns) ddr400 sdram in tsop packages. this 184-pin dimm uses gold contact fingers and requires +2.5v. the electrical and mechanical specifications are as follows: features: clock cycle time (tck) 5ns (min.) / 10ns (max.) row cycle time (t rc ) 55ns (min.) refresh row cycle time (trfc) 70ns (min.) row active time (tras) 40ns (min.) / 100,000ns (max.) single power supply of +2.5v (+/- .25v) power (idd0) 2.200 w (operating) ul rating 94 v - 0 document no. valueram0262-001.a00 09/25/02 figure 1: kvr400x64c25/256 184-pin ddr sdram module kvr400x64c25/256 256mb 32m x 64-bit ddr400 cl2.5 184-pin dimm
note: the module defined in this data sheet is one of several configurations available under this part number. while all configurations are compatible, the dram combination and/or the module height may vary from what is described here. however, in no configuration will the module height exceed 1.250" (31.75mm). .com .com .com 4 .com u datasheet
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