OBSOLETE

54AC257, 54ACT257

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SNOS102B – JULY 1998 – REVISED APRIL 2013

54AC257 • 54ACT257 Quad 2-Input Multiplexer with TRI-STATE Outputs

Check for Samples: 54AC257, 54ACT257

1

FEATURES

DESCRIPTION

The 'AC/'ACT257 is a quad 2-input multiplexer with

23

•

TRI-STATE outputs. Four bits of data from two

•

Multiplexer Expansion by Tying Outputs

sources can be selected using a Common Data

Together

Select input. The four outputs present the selected

•

Noninverting TRI-STATE Outputs

data in true (noninverted) form. The outputs may be

switched to a high impedance state by placing a logic

•

Outputs Source/Sink 24 mA

HIGH on the common Output Enable (OE) input,

•

'ACT257 has TTL-Compatible Inputs

allowing the outputs to interface directly with bus-

•

Standard Military Drawing (SMD)

oriented systems.

–

'AC257: 5962-88703

–

'ACT257: 5962-89689

Logic Symbols

IEEE/IEC

Figure 1.

Figure 2.

PIN DESCRIPTION

Pin Names

Description

S

Common Data Select Input

OE

TRI-STATE Output Enable Input

Data Inputs from Source 0

Data Inputs from Source 1

TRI-STATE Multiplexer Outputs

1

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2

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3

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Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.