TLF9493

August 1995

54F74F189 64-Bit Random Access

Memory with TRI-STATE

Outputs

General Description

The ’F189 is a high-speed 64-bit RAM organized as a 16-

word by 4-bit array Address inputs are buffered to minimize

loading and are fully decoded on-chip The outputs are TRI-

STATE and are in the high impedance state whenever the

Chip Select (CS) input is HIGH The outputs are active only

in the Read mode and the output data is the complement of

the stored data

Features

Y

TRI-STATE outputs for data bus applications

Y

Buffered inputs minimize loading

Y

Address decoding on-chip

Y

Diode clamped inputs minimize ringing

Y

Available in SOIC (300 mil only)

Commercial

Military

Package

Package Description

Number

74F189PC

N16E

16-Lead (0300 Wide) Molded Dual-In-Line

54F189DL (Note 2)

J16A

16-Lead Ceramic Dual-In-Line

74F189SC (Note 1)

M16A

16-Lead (0150 Wide) Molded Small Outline JEDEC

74F189SJ (Note 1)

M16D

16-Lead (0300 Wide) Molded Small Outline EIAJ

54F189FL (Note 2)

W16A

16-Lead Cerpack

54F189LL (Note 2)

E20A

20-Lead Ceramic Leadless Chip Carrier Type C

Note 1

Devices also available in 13

Note 2

Logic Symbols

Connection Diagrams

TLF9493 – 1

IEEEIEC

TLF9493 – 4

Pin Assignment

for DIP SOIC and Flatpak

TLF9493 – 2

Pin Assignment

for LCC

TLF9493 – 3

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A