HomedatasheetW9425G6JH-5I

W9425G6JH-5I Datasheet

4M X 4 BANKS X 16 BITS DDR SDRAM
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Description

 GENERAL DESCRIPTION
W9425G6JH  is  a  CMOS  Double  Data  Rate  synchronous  dynamic  random  access  memory  (DDR SDRAM), organized as 4,194,304 words   4 banks    16 bits. W9425G6JH  delivers a data bandwidth of up to 500M  words per second (-4).  To fully comply with the personal computer industrial standard, W9425G6JH  is  sorted  into  the  following  speed  grades:  -4,  -5,  -5I  and  -5A.  The  -4  grade  parts  is compliant to the DDR500/CL3  and CL4  specification.  The  -5/-5I/-5A  grade  parts  are  compliant to the DDR400/CL3  specification  (the  -5I  industrial  grade,  -5A  automotive  grade  which  is  guaranteed  to support -40°C ~ 85°C).
All Input reference to the positive edge of CLK (except for DQ, DM and CKE). The timing reference
point for the differential clock is when the CLK and CLK signals cross during a transition. Write and Read data are synchronized with the both edges of DQS (Data Strobe).
By  having  a  programmable  Mode  Register,  the  system  can  change  burst  length,  latency  cycle, interleave or sequential burst to maximize its performance.  W9425G6JH  is ideal for main memory in high performance applications.

FEATURES
2.5V ± 0.2V Power Supply for DDR400
2.4V~2.7V Power Supply for DDR500
Up to 250 MHz Clock Frequency
Double Data Rate architecture; two data transfers per clock cycle
Differential clock inputs (CLK and CLK)
DQS is edge-aligned with data for Read; center-aligned with data for Write
CAS Latency: 2, 2.5, 3 and 4
Burst Length: 2, 4 and 8
Auto Refresh and Self Refresh
Precharged Power Down and Active Power Down
Write Data Mask
Write Latency = 1
7.8µS refresh interval (8K/64 mS refresh)
Maximum burst refresh cycle: 8
Interface: SSTL_2
Packaged in TSOP II 66-pin, using Lead free materials with RoHS compliant

Features

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Manufacturer information

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