Memory Module Specification
DESCRIPTION:
This document describes ValueRAM's 256M x 72-bit 2GB (2048MB) DDR2-400 CL3
SDRAM (Synchronous DRAM) ECC memory module. The components on this module
include eighteen 128M x 8-bit (32M x 8-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) 105ns
Row Active Time (tRAS) 40ns (min.) / 70,000ns (max.)
Single Power Supply of +1.8V (+/- .1V)
Power 2.615 W (operating)
UL Rating 94 V - 0
Document No. VALUERAM0473-001.A00
12/12/05
Figure 1: KVR400D2E3/2G 240-Pin DIMM
KVR400D2E3/2G
2GB 256M x 72-Bit DDR2-400
CL3 ECC 240-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 1.250" (31.75mm).
1.27 ± 0.10
4.00
Units : Millimeters
A
B
63.00
55.00
30.00
133.35
2.50
1.00
0.20
2.50±0.20
Detail B
5.00
Detail A
4.00
1.50±0.10
0.80±0.05
4.00
3.80
3.00
4.00
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