Memory Module Specification
DESCRIPTION:
This document describes ValueRAM's 64M x 72-bit (512MB) DDR2-400 CL3 SDRAM
(Synchronous DRAM) ECC memory module. The components on this module include
nine 64M x 8-bit (16M 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 1.825 W (operating)
UL Rating 94 V - 0
Document No. VALUERAM0390-001.A00
03/21/05
Figure 1: KVR400D2E3/512 240-Pin DIMM
KVR400D2E3/512
512MB 64M 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).
131.35
Units : Millimeters
133.35
10.00
1.270 ± 0.10
2.7
SPD
128.95
(2)
2.50
(2X)4.00
30.00
2.30
17.80
A
B
63.00
55.00
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
/