description: this document describes valueram's 64m x 72-bit (512mb) ddr266 cl2.5 sdram (synchronous dram) low-profile registered ecc memory module. the components on this module include eighteen 64m x 4-bit (16m x 4-bit x 4 bank) ddr266 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) 7.5ns (min.) / 12ns (max.) row cycle time (t rc ) 65ns (min.) refresh row cycle time (trfc) 75ns (min.) row active time (tras) 45ns (min.) / 120,000ns (max.) single power supply of +2.5v (+/- .2v) power 5.175 w (operating) ul rating 94 v - 0 part no. valueram0256-001.b00 08/31/04 figure 1: kvr266x72rc25l/512 184-pin dimm kvr266x72rc25l/512 512mb 64m x 72-bit ddr266 cl2.5 ecc registered 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 1.2" (30.48mm).
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