74AC251 鈥?74ACT251 8-Input Multiplexer with 3-STATE Output
November 1988
Revised November 1999
74AC251 鈥?74ACT251
8-Input Multiplexer with 3-STATE Output
General Description
The AC/ACT251 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 universal
function generator to generate any logic function of four
variables. Both true and complementary outputs are pro-
vided.
Features
s
I
CC
reduced by 50%
s
Multifunctional capability
s
On-chip select logic decoding
s
Inverting and noninverting 3-STATE outputs
s
Outputs source/sink 24 mA
s
ACT251 has TTL-compatible inputs
Ordering Code:
Order Number
74AC251SC
74AC251SJ
74AC251MTC
74AC251PC
74ACT251SC
74ACT251MTC
74ACT251PC
Package Number
M16A
M16D
MTC16
N16E
M16A
MTC16
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150鈥?Narrow Body
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150鈥?Narrow Body
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
S
0
鈥揝
2
OE
I
0
鈥揑
7
Z
Z
Select Inputs
3-STATE Output Enable Input
Multiplexer Inputs
3-STATE Multiplexer Output
Complementary 3-STATE Multiplexer Output
Description
FACT錚?is a trademark of Fairchild Semiconductor Corporation.
漏 1999 Fairchild Semiconductor Corporation
DS009945
www.fairchildsemi.com