January 1989

Revised May 1999

© 1999 Fairchild Semiconductor Corporation

DS009536.prf

www.fairchildsemi.com

74F403A

First-In First-Out (FIFO) Buffer Memory

General Description

The 74F403A is an expandable fall-through type high-

speed First-In First-Out (FIFO) Buffer Memory optimized

for high-speed disk or tape controllers and communication

buffer applications. It is organized as 16-words by 4-bits

and may be expanded to any number of words or any num-

ber of bits in multiples of four. Data may be entered or

extracted asynchronously in serial or parallel, allowing eco-

nomical implementation of buffer memories.

The 74F403A has 3-STATE outputs which provide added

versatility and is fully compatible with all TTL families.

Features

s Serial or parallel input

s Serial or parallel output

s Expandable without external logic

s 3-STATE outputs

s Fully compatible with all TTL families

s Slim 24-pin package

s 9403A replacement

s Guaranteed 4000V minimum ESD protection

Ordering Code:

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

Connection Diagram

Logic Symbol

Order Number

Package Number

Package Description

74F403ASPC

N24C

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide