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Fairchild Semiconductor - Quad 2-Input Multiplexer with 3-STATE Outputs

Numéro de référence 74ACT257MTC
Description Quad 2-Input Multiplexer with 3-STATE Outputs
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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74ACT257MTC fiche technique
November 1988
Revised November 1999
74AC257 74ACT257
Quad 2-Input Multiplexer with 3-STATE Outputs
General Description
The AC/ACT257 is a quad 2-input multiplexer with 3-
STATE outputs. Four bits of data from two sources can be
selected using a Common Data Select input. The four out-
puts present the selected data in true (noninverted) form.
The outputs may be switched to a high impedance state by
placing a logic HIGH on the common Output Enable (OE)
input, allowing the outputs to interface directly with bus-ori-
ented systems.
Features
s ICC and IOZ reduced by 50%
s Multiplexer expansion by tying outputs together
s Noninverting 3-STATE outputs
s Outputs source/sink 24 mA
s ACT257 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC257SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150Narrow Body
74AC257SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC257MTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC257PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
74ACT257SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150Narrow Body
74ACT257SJ
74ACT257MTC
M16D
MTC16
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
www.DataSheet4U.com
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT257PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
S
OE
I0aI0d
I1aI1d
ZaZd
Description
Common Data Select Input
3-STATE Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3-STATE Multiplexer Outputs
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS009949
www.fairchildsemi.com

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