54AC257 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Quad 2-Input Multiplexer with TRI-STATE Outputs

OBSOLETE
54AC257, 54ACT257
www.ti.com
SNOS102B – JULY 1998 – REVISED APRIL 2013
54AC257 • 54ACT257 Quad 2-Input Multiplexer with TRI-STATE Outputs
Check for Samples: 54AC257, 54ACT257
FEATURES
1
•23 I_CC and I_OZ Reduced by 50%
• Multiplexer Expansion by Tying Outputs
Together
• Noninverting TRI-STATE Outputs
• Outputs Source/Sink 24 mA
• 'ACT257 has TTL-Compatible Inputs
• Standard Military Drawing (SMD)
– 'AC257: 5962-88703
– 'ACT257: 5962-89689
DESCRIPTION
The 'AC/'ACT257 is a quad 2-input multiplexer with
TRI-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 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-
oriented systems.
Logic Symbols
IEEE/IEC
Figure 1.
PIN DESCRIPTION
S
OE
I_0a–I_0d
I_1a–I_1d
Z_a–Z_d
Pin Names
Common Data Select Input
TRI-STATE Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
TRI-STATE Multiplexer Outputs
Figure 2.
Description
1
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2
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3
PRODUCTION DATA information is current as of publication date.
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Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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