© 1999 Fairchild Semiconductor Corporation DS009950 www.fairchildsemi.com
November 1988
Revised November 1999
74ACT258 Quad 2-Input Multiplexer with 3-STATE Outputs
74ACT258
Quad 2-Input Multiplexer with 3-STATE Outputs
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 outputs
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-ori-
ented systems.
Features
■ I
CC
and I
OZ
reduced by 50%
■ Multiplexer expansion by tying outputs together
■ Inverting 3-STATE outputs
■ Outputs source/sink 24 mA
■ TTL-compatible inputs
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Pin Descriptions
FACT is a trademark of Fairchild Semiconductor Corporation.
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
74ACT258PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” 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