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54ACT257F Arkusz danych(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numer części 54ACT257F
Szczegółowy opis  Quad 2-Input Multiplexer with TRI-STATE Outputs
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
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54ACT257F Arkusz danych(HTML) 1 Page - National Semiconductor (TI)

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54AC257
54ACT257
Quad 2-Input Multiplexer with TRI-STATE® Outputs
General 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) in-
put,
allowing
the
outputs
to
interface
directly
with
bus-oriented systems.
Features
n ICC and IOZ reduced by 50%
n Multiplexer expansion by tying outputs together
n Noninverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT257 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’AC257: 5962-88703
— ’ACT257: 5962-89689
Logic Symbols
Pin Names
Description
S
Common Data Select Input
OE
TRI-STATE Output Enable Input
I
0a–I0d
Data Inputs from Source 0
I
1a–I1d
Data Inputs from Source 1
Z
a–Zd
TRI-STATE Multiplexer Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACTis a trademark of Fairchild Semiconductor Corporation.
DS100286-1
IEEE/IEC
DS100286-2
July 1998
© 1998 National Semiconductor Corporation
DS100286
www.national.com


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