© 1999 Fairchild Semiconductor Corporation DS009528 www.fairchildsemi.com
May 1988
Revised August 1999
7
4F381 4-Bi
t Arit
hmeti
c

Lo
gic Unit
74F381
4-Bit Arithmetic Logic Unit
General Description
The 74F381 performs three arithmetic and three logic oper-
ations on two 4-bit words, A and B. Two additional select
input codes force the function outputs LOW or HIGH. Carry
propagate and generate outputs are provided for use with
the 74F182 carry lookahead generator for high-speed
expansion to longer word lengths. For ripple expansion,
refer to the 74F382 ALU data sheet.
Features
a73 Low input loading minimizes drive requirements
a73 Performs six arithmetic and logic functions
a73 Selectable LOW (clear) and HIGH (preset) functions
a73 Carry generate and propagate outputs for use with carry
lookahead generator

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F381SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F381SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F381PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide