54F189 datasheet(2/8 Pages) NSC

номер детали	54F189

подробное описание детали	64-Bit Random Access Memory with TRI-STATEE Outputs

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производитель	NSC [National Semiconductor (TI)]

домашняя страница	http://www.national.com

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Unit LoadingFan Out

54F74F

Pin Names

Description

UL

Input IIH IIL

HIGHLOW

Output IOH IOL

A0–A3

Address Inputs

1010

20 mA b06 mA

CS

Chip Select Input (Active LOW)

1010

20 mA b12 mA

WE

Write Enable Input (Active LOW)

1010

20 mA b06 mA

D0–D3

Data Inputs

1010

20 mA b06 mA

O0–O3

Inverted Data Outputs

15040 (333)

b

30 mA24 mA (20 mA)

Function Table

Inputs

Operation

Condition of Outputs

CS

WE

L

Write

High Impedance

L

H

Read

Complement of Stored Data

H

X

Inhibit

High Impedance

H e HIGH Voltage Level

L e LOW Voltage Level

X e Immaterial

Block Diagram

TLF9493 – 5

2

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