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Memory Module Specification
KVR400D2S4R3/512
512MB 64M x 72-Bit DDR2-400
CL3 Registered 240-Pin ECC DIMM
DESCRIPTION:
This document describes ValueRAM's 64M x 72-bit (512MB) DDR2-400 CL3 SDRAM
(S ynchronous DRAM) "single rank" registered ECC memory module. The components on
this module include eighteen 64M x 4-bit (16M x 4-bit x 4 Bank) DDR2-400 SDRAM in
FBGA packages. This 240-pin DIMM uses gold contact fingers and requires +1.8V. The
electrical and mechanical specifications are as follows:
FEATURES:
Clock Cycle Time (tCK) CL=3 5ns (min.) / 8ns (max.)
Row Cycle Time (tRC) 55ns (min.)
Refresh to Active/Refresh Command Time (tRFC) 75ns
Row Active Time (tRAS) 40ns (min.) / 70,000ns (max.)
Single Power Supply of +1.8V (+/- .1V)
Power 4.050 W (operating)
UL Rating 94 V - 0
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).
(Units = millimeters)
Figure 1: KVR400D2S4R3/512 240-Pin DIMM
Document No. VALUERAM0456-001.A00
08/16/05
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