HM5425801B datasheet(4/65 Pages) ELPIDA

Part #	HM5425801B

Description	256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 횞 16-bit 횞 4-bank/8-Mword 횞 8-bit 횞 4-bank/ 16-Mword 횞 4-bit 횞 4-bank

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Manufacturer	ELPIDA [Elpida Memory]

Direct Link	http://www.elpida.com/en

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4 / 65 page

HM5425161B, HM5425801B, HM5425401B Series

Data Sheet E0086H20

4

Pin Description

Pin name

Function

A0 to A12

Address input

 Row address A0 to A12

 Column address

A0 to A8

BA0, BA1

Bank select address

DQ0 to DQ15

Data-input/output

DQSU

Upper input and output data strobe

DQSL

Lower input and output data strobe

CS

Chip select

RAS

Row address strobe command

CAS

Column address strobe command

WE

Write enable

DMU

Upper byte input mask

DML

Lower byte input mask

CLK

Clock input

CLK

Differential clock input

CKE

Clock enable

V

REF

Input reference voltage

V

CC

Power for internal circuit

V

SS

Ground for internal circuit

V

CCQ

Power for DQ circuit

V

SSQ

Ground for DQ circuit

NC

No connection

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HM5425801B Datasheet(PDF) 4 Page - Elpida Memory

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