9403A First-In First-Out (FIFO) Buffer Memory
April 1989
Revised June 1999
9403A
First-In First-Out (FIFO) Buffer Memory
General Description
The 9403A 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 number of bits
in multiples of four. Data may be entered or extracted asyn-
chronously in serial or parallel, allowing economical imple-
mentation of buffer memories.
The 9403A has 3-STATE outputs which provide added ver-
satility 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
Ordering Code:
Order Number
9403APC
Package Number Package Description
N24E
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-011, 0.400 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Logic Symbol
Connection Diagram
漏 1999 Fairchild Semiconductor Corporation
DS010193.prf
www.fairchildsemi.com