HM628128D Series

1 M SRAM (128-kword

× 8-bit)

ADE-203-996 (Z)

Preliminary, Rev. 0.0

Jan. 20, 1999

Description

The Hitachi HM628128D Series is 1-Mbit static RAM organized 131,072-kword

× 8-bit. HM628128D

Series has realized higher density, higher performance and low power consumption by employing Hi-

CMOS process technology.

The HM628128D Series offers low power standby power dissipation;

therefore, it is suitable for battery backup systems. It has package variations of standard 32-pin plastic DIP,

standard 32-pin plastic SOP and standard 32-pin plastic TSOPI.

Features

• Single 5 V supply: 5 V ± 10%

• Access time: 55 ns/70 ns (max)

• Power dissipation

 Active: 30 mW/MHz (typ)

 Standby: 10 µW (typ)

• Completely static memory.

 No clock or timing strobe required

• Equal access and cycle times

• Common data input and output

 Three state output

• Directly TTL compatible all inputs

• Battery backup operation

 2 chip selection for battery backup