© 1999 Fairchild Semiconductor Corporation

DS009493

www.fairchildsemi.com

April 1988

Revised July 1999

74F189

64-Bit Random Access Memory with 3-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 mini-

mize loading and are fully decoded on-chip. The outputs

are 3-STATE and are in the high impedance state when-

ever 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

s 3-STATE outputs for data bus applications

s Buffered inputs minimize loading

s Address decoding on-chip

s Diode clamped inputs minimize ringing

Ordering Code:

Devices also available in Tape and Reel. Specify by appending suffix “X” to the ordering code.

Logic Symbols

IEEE/IEC

Connection Diagram

Order Number

Package Number

Package Description

74F189SC

M16B

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide

74F189SJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74F189PC

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide