description: this document describes valueram's 32m x 72-bit (256mb) ddr333 cl2.5 sdram (synchronous dram) registered ecc memory module. the components on this module include nine 32m x 8-bit (8m x 8-bit x 4 bank) ddr333 sdram in tsop packages and three 16-bit drivers in tssop 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) 6ns (min.) / 12ns (max.) row cycle time (t rc ) 60ns (min.) refresh row cycle time (trfc) 72ns (min.) row active time (tras) 42ns (min.) / 70,000ns (max.) single power supply of +2.5v (+/- .2v) power (idd0) 3.900 w (operating) ul rating 94 v - 0 part no. valueram0308-001.b00 07/14/04 figure 1: kvr333x72rc25/256 184-pin dimm kvr333x72rc25/256 256mb 32m x 72-bit ddr333 cl2.5 registered 184-pin ecc 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 1.200" (30.48mm).
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