description: this document describes valueram's 256m x 72-bit (2gb) ddr266 cl2.5 sdram (syn- chronous dram) registered ecc memory module. the components on this module include eighteen stacked 256m x 4-bit (thirty-six 128m x 4-bit) ddr266 sdram 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) 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 (+/- .25v) power (idd0) 12.550 w operating ul rating 94 v - 0 document no. valueram0272-001.a00 09/26/02 figure 1: kvr266x72rc25l/2g 184-pin ddr sdram module kvr266x72rc25l/2g 2gb 256 x 72-bit ddr266 registered cl2.5 ecc 184-pin dimm module 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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