74ACT258 Quad 2-Input Multiplexer with 3-STATE Outputs
April 2007
©1988 Fairchild Semiconductor Corporation www.fairchildsemi.com
74ACT258 Rev. 1.4
74ACT258
Quad 2-Input Multiplexer with 3-STATE Outputs
Features
■
I
CC
and I
OZ
reduced by 50%
■
Multiplexer expansion by tying outputs together
■
Inverting 3-STATE outputs
■
Outputs source/sink 24mA
■
TTL-compatible inputs
General Description
The ACT258 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 the complement
(inverted) form. The outputs may be switched to a high
impedance state with a HIGH on the common Output
Enable (OE
) input, allowing the outputs to interface
directly with bus-oriented systems.
Ordering Information
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
Connection Diagram Pin Description
Order
Number
Package
Number Package Description
74ACT258SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012,
0.150” Narrow Body
74ACT258SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE 11, 5.3mm Wide
74ACT258MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
4.4mm Wide
Pin Names Description
S Common Data Select Input
OE
3-STATE Output Enable Input
I
0a
–I
0d
Data Inputs from Source 0
I
1a
–I
1d
Data Inputs from Source 1
Z
a
–Z
d
3-STATE Inverting Data Outputs
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