HM6216255H 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HM6216255H

4M high Speed SRAM (256-kword × 16-bit)

Hitachi -> Renesas Electronics 

Pin Description

Pin name

A0 to A17

I/O1 to I/O16

CS

OE

WE

Function

Address input

Data input/output

Chip select

Output enable

Write enable

HM6216255H Series

Pin name

UB

LB

VCC

VSS

NC

Function

Upper byte select

Lower byte select

Power supply

Ground

No connection

Block Diagram

(LSB) A1

A17

A7

A11

A16

A2

A6

(MSB)A5

I/O...1

I/O8

I/O...9

I/O16

WE

CS

LB

UB

OE

Row

decoder

Memory matrix

256 rows × 8 columns ×

128 blocks × 16 bit

(4,194,304 bits)

Internal

voltage VCC

generater

VSS

CS

Input

data

control

Column I/O

Column decoder

CS

A10 A8 A9 A12 A13 A14 A0 A15 A3 A4

CS

3

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