memory module specification description: this document describes valueram's 32m x 72-bit (256mb), cas latency 2.5 sdram (synchronous dram) ddr266 ecc memory module. the components on this module include eighteen 16m x 8-bit (4m x 8-bit x 4 bank / 133mhz, 7.5ns, cl2.5 components) 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.) / 15ns (max.) row cycle time (t rc ) 65ns (min.) refresh row cycle time (trfc) 75ns (min.) row active time (tras) 45ns (min.) / 12,000ns (max.) single power supply of +2.5v (+/- .25v) power 3.825 w (operating) ul rating 94 v - 0 part no. valueram0028-001.a00 10/13/00 figure 1: kvr266x72c25/256 184-pin ddr sdram module kvr266x72c25/256 ddr266 sdram 184-pin ecc dual in-line memory module (dimm) 1.250? 0.700? 0.393? 0.000? 0.000? 2.886? 5.250? 0.050 0.0078 0.006 (0.20 0.15) (1.270) 0.100 (2.50 ) 0.250 (6.350) 0.157 (4.00) 0.071 (1.80) 0.039 0.002 (1.000 0.050) (3.80) 2.175 (6.62) 0.26 0.1496 (3.00) 0.118 (2.00) 0.0787 (4.00) 0.1575 (31.75) (17.80) (10.00) (00.00) (73.30) (133.35) units : inches (millimeters) 1 (00.00)
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