© 1999 Fairchild Semiconductor Corporation DS009504 www.fairchildsemi.com
April 1988
Revised August 1999
7
4F251A
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74F251A
8-Input Multiplexer with 3-STATE Outputs
General Description
The 74F251A is a high-speed 8-input digital multiplexer. It
provides, in one package, the ability to select one bit of
data from up to eight sources. It can be used as a universal
function generator to generate any logic function of four
variables. Both assertion and negation outputs are pro-
vided.
Features
a73 Multifunctional capability
a73 On-chip select logic decoding
a73 Inverting and non-inverting 3-STATE outputs

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
74F251ASC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F251ASJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F251APC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide