© 1999 Fairchild Semiconductor Corporation DS009544 www.fairchildsemi.com
April 1988
Revised August 1999
7
4F433 Fir
s
t-
In Fir
s
t-
Out (FI
F
O) Buff
er Mem
o
r
y
74F433
First-In First-Out (FIFO) Buffer Memory
General Description
The 74F433 is an expandable fall-through type high-speed
First-In First-Out (FIFO) Buffer Memory that is optimized for
high-speed disk or tape controller and communication
buffer applications. It is organized as 64-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 74F433 has 3-STATE outputs that provide added ver-
satility, and is fully compatible with all TTL families.
Features
a73 Serial or parallel input
a73 Serial or parallel output
a73 Expandable without additional logic
a73 3-STATE outputs
a73 Fully compatible with all TTL families
a73 Slim 24-pin package
a73 9423 replacement

Ordering Code:
Logic Symbol Connection Diagram
Order Number Package Number Package Description
74F433SPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide