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Memory Module Specification

DESCRIPTION:

This document describes ValueRAM's 32M x 72-bit (256MB) DDR400 CL3 SDRAM

(Synchronous DRAM) "single rank" Registered ECC memory module. The components on

this module include nine 32M x 8-bit (8M x 8-bit x 4 Bank) DDR400 SDRAM in TSOP

packages. This 184-pin DIMM uses gold contact fingers and requires +2.6V. The electrical

and mechanical specifications are as follows:

FEATURES:

Clock Cycle Time (tCK) 5ns (min.) / 10ns (max.)

Row Cycle Time (tRC) 55ns (min.)

Refresh Row Cycle Time (tRFC) 70ns (min.)

Row Active Time (tRAS) 40ns (min.) / 70,000ns (max.)

Single Power Supply of +2.6V (+/- .1V)

Power 4.125 W (operating)

UL Rating 94 V - 0

Part No. VALUERAM0430-001.A00

05/23/05

Figure 1: KVR400S8R3A/256 184-Pin DIMM

KVR400S8R3A/256

256MB 32M x 72-Bit DDR400 CL3

Registered 184-Pin ECC DIMM

1.200

0.700

0.393

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)

(00.00)

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).

Memory Module Specification 1

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Pagina 1 - Memory Module Specification

Memory Module SpecificationDESCRIPTION:This document describes ValueRAM's 32M x 72-bit (256MB) DDR400 CL3 SDRAM(Synchronous DRAM) "single ra

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