Memory Module Specification
KVR266X72RC25/512D
512MB 64M x 72-Bit DDR266 CL2.5
Registered ECC 184-Pin DIMM
DESCRIPTION:
This document describes ValueRAM's 64M x 72-bit (512MB) DDR266 CL2.5 SDRAM
(Synchronous DRAM) Registered ECC memory module. The components on this module
include eighteen 32M x 8-bit (8M x 8-Bit x 4 bank) DDR266 SDRAM in TSOP 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)
Row Cycle Time (t
RC
)
Refresh Row Cycle Time (tRFC)
Row Active Time (tRAS)
Single Power Supply of
Power
UL Rating
7.5ns (min.) / 12ns (max.)
65ns (min.)
75ns (min.)
45ns (min.) / 120,000ns (max.)
+2.5V (+/- .2V)
4.700 W operating
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 1.700" (43.18mm).
Units : Inches (Millimeters)
1.200
(30.48)
(17.80)
0.700
0.393
(10.00)
0.000
(00.00)
1
(2.50 )
0.26
(6.62)
0.100
0.250
(6.350)
0.157
(4.00)
0.1496
(3.80)
0.039
±
0.002
(1.000
±
0.050)
0.0787
(2.00)
0.0078 ±0.006
(0.20
±0.15)
0.050
(1.270)
0.1575
(4.00)
0.118
(3.00)
2.175
0.071
(1.80)
Figure 1: KVR266X72RC25/512D 184-Pin DIMM
Document No. VALUERAM0271-001.B00
08/31/04
5.250
(133.35)
0.000
(00.00)
2.886
(73.30)
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