Kingston Technology 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC KHX6400D2K2/4G Data Sheet

Memory Module Specifications

4GB (2GB 256M x 64-Bit x 2 pcs.)
PC2-6400 CL5 240-Pin DIMM Kit

Kingston.com

Document No. 4804737-001.C00    07/18/11    Page 1

Kingston’s KHX6400D2K2/4G is a kit of two 256M x 64-
bit 2GB (2048MB) DDR2-800 CL5 SDRAM (Synchro-
nous DRAM) memory modules, based on sixteen 128M x 
8-bit DDR2 FBGA components. Total kit capacity is 4GB 
(4096MB). Each module pair has been tested to run at 
DDR2 800MHz at latency timing of 5-5-5-15 at 1.85V. The 
SPD is programmed to JEDEC standard latency 667Mhz 
timing of 5-5-5-15 at 1.8V. Each 240-pin DIMM uses gold 
contact fingers and requires +1.8V. The electrical and me-
chanical specifications are as follows:

Clock Cycle Time (tCK) CL=5  

3ns (min.) / 8ns (max.)

Row Cycle Time (tRC)  

60ns (min.)

Refresh to Active/Refresh  

127.5ns 

Command Time (tRFC)

Row Active Time (tRAS)  

45ns (min.) / 70,000ns (max.)

Single Power Supply of  

+1.8V (+/- .1V)

Power  

2.016 W (operating per module)

UL Rating  

94 V - 0

Operating Temperature  

0° C to 55° C

Storage Temperature  

-55° C to +125° C

•  Power supply : Vdd: 1.8V ± 0.1V, Vddq: 1.8V ± 0.1V
•  Double-data-rate architecture; two data transfers per  

clock cycle

•  Bidirectional data strobe(DQS)
•  Differential clock inputs(CK and CK)
•  DLL aligns DQ and DQS transition with CK transition
•  Programmable Read latency 5 (clock)
•  Burst Length: 4, 8 (Interleave/nibble sequential)
•  Programmable Burst type (sequential & interleave)
•  Timing Reference: 5-5-5-15 at +1.8V / 5-5-5-15 at +1.85V
•  Edge aligned data output, center aligned data input
•  Auto & Self refresh, 7.8us refresh interval (8K/64ms refresh)
•  Serial presence detect with EEPROM
•  High Performance Heat Spreader
•  PCB : Height 1.180” (30.00mm), double sided component

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