Memory Module Specification
DESCRIPTION:
This document describes ValueRAM's 128M x 72-bit 1GB (1024MB) DDR333 CL2.5
SDRAM (Synchronous DRAM) "single rank" Registered ECC memory module. The com-
ponents on this module include eighteen 128M x 4-bit DDR333 SDRAM in FBGA 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) 6ns (min.) / 12ns (max.)
Row Cycle Time (tRC) 60ns (min.)
Refresh Row Cycle Time (tRFC) 72ns (min.)
Row Active Time (tRAS) 42ns (min.) / 70,000ns (max.)
Single Power Supply of +2.5V (+/- .2V)
Power 6.600 W (operating)
UL Rating 94 V - 0
Part No. VALUERAM0446-001.A00
06/21/05
Figure 1: KVR333S4R25/1G 184-Pin DIMM
KVR333S4R25/1G
1GB 128M x 72-Bit DDR333
CL2.5 Registered 184-Pin ECC 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 1.200" (30.48mm).
A B
5.25 ± 0.005
5.171
(131.350)
(133.350 ± 0.13)
(30.48)
1.2
5.077
(128.950)
0.393
(10.00)
0.100 Min
(2.50 Min)
(19.80)
0.78
(17.80)
0.7
R (2.00)
0.0787
(3.00)
0.118
(2.30 Min)
A B
0.157 Max
0.050 ± 0.0039
(1.270 ± 0.10)
(3.99 Max)
(4.00)
(0.157)
/