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Memory Module Specification
DESCRIPTION:
This document describes ValueRAM's 256M x 72-bit (2GB) DDR266 CL2.5 SDRAM (Syn-
chronous DRAM) Registered ECC memory module. The components on this module include
eighteen stacked 256M x 4-bit (thirty-six 128M x 4-Bit) DDR266 SDRAM and three 16-bit
drivers in TSSOP 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.) / 12ns (max.)
Row Cycle Time (tRC) 65ns (min.)
Refresh Row Cycle Time (tRFC) 75ns (min.)
Row Active Time (tRAS) 45ns (min.) / 120,000ns (max.)
Single Power Supply of +2.5V (+/- .25V)
Power (IDD0) 12.550 W operating
UL Rating 94 V - 0
Document No. VALUERAM0272-001.A00
09/26/02
Figure 1: KVR266X72RC25L/2G 184-Pin DDR SDRAM Module
KVR266X72RC25L/2G
2GB 256 x 72-Bit DDR266 Registered
CL2.5 ECC 184-Pin DIMM Module
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).
1.200
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
(30.48)
(17.80)
(10.00)
(00.00)
(73.30)
(133.35)
Units : Inches (Millimeters)
1
(00.00)
/