74ACT253 National Semiconductor, 74ACT253 Datasheet

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74ACT253

Manufacturer Part Number
74ACT253
Description
Dual 4-Input Multiplexer with TRI-STATE Outputs
Manufacturer
National Semiconductor
Datasheet

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Part Number
Manufacturer
Quantity
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Part Number:
74ACT253SCX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
© 1998 National Semiconductor Corporation
54AC253 • 54ACT253
Dual 4-Input Multiplexer with TRI-STATE
General Description
The ’AC/’ACT253 is a dual 4-input multiplexer with
TRI-STATE outputs. It can select two bits of data from four
sources using common select inputs. The outputs may be in-
dividually switched to a high impedance state with a HIGH
on the respective Output Enable (OE) inputs, allowing the
outputs to interface directly with bus oriented systems.
Features
n I
Logic Diagrams
TRI-STATE
FACT
CC
®
is a registered trademark of Fairchild Semiconductor Corporation.
and I
®
is a registered trademark of National Semiconductor Corporation.
OZ
reduced by 50%
I
I
S
OE
OE
Z
0a
0b
a
0
, Z
, S
–I
–I
Pin Names
a
b
3a
3b
b
1
DS100285
DS100285-1
Side A Data Inputs
Side B Data Inputs
Common Select Inputs
Side A Output Enable Input
Side B Output Enable Input
TRI-STATE Outputs
n Multifunction capability
n Noninverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT253 has TTL-compatible inputs
n Standard Military Drawing (SMD)
Description
— ’AC253: 5962-87693
— ’ACT253: 5962-87761
®
IEEE/IEC
Outputs
DS100285-2
www.national.com
August 1998

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74ACT253 Summary of contents

Page 1

... TRI-STATE ® registered trademark of National Semiconductor Corporation. FACT ® registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100285 Outputs ® n Multifunction capability n Noninverting TRI-STATE outputs n Outputs source/sink ’ACT253 has TTL-compatible inputs n Standard Military Drawing (SMD) — ...

Page 2

Connection Diagrams Pin Assignment for DIP and Flatpak DS100285-3 Functional Description The ’AC/’ACT253 contains two identical 4-input multiplexers with TRI-STATE outputs. They select two bits from four sources selected by common Select inputs (S 4-input multiplexers have individual Output Enable ...

Page 3

Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 DS100285-5 www.national.com ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Input Diode Current ( −0. 0. Input Voltage ( Output Diode Current ( −0. 0.5V ...

Page 5

DC Characteristics for ’AC Family Devices Symbol Parameter (Note 3) I Minimum Dynamic OLD I Output Current OHD I Maximum Quiescent CC Supply Current Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum ...

Page 6

AC Electrical Characteristics Symbol Parameter t Propagation Delay PLH Propagation Delay PHL Propagation Delay PLH Propagation Delay PHL ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier (L) 16 Lead Ceramic Dual-In-Line Package (D) NS Package Number E20A NS Package Number J16A 7 www.national.com ...

Page 8

... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 ...

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