54ac373 National Semiconductor Corporation, 54ac373 Datasheet

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54ac373

Manufacturer Part Number
54ac373
Description
Octal Transparent Latch With Tri-state Outputs
Manufacturer
National Semiconductor Corporation
Datasheet

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© 1998 National Semiconductor Corporation
54AC373 • 54ACT373
Octal Transparent Latch with TRI-STATE
General Description
The ’AC/’ACT373 consists of eight latches with TRI-STATE
outputs for bus organized system applications. The flip-flops
appear transparent to the data when Latch Enable (LE) is
HIGH. When LE is LOW, the data that meets the setup time
is latched. Data appears on the bus when the Output Enable
(OE) is LOW. When OE is HIGH, the bus output is in the high
impedance state.
Logic Symbols
TRI-STATE
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
®
is a registered trademark of National Semiconductor Corporation.
D
LE
OE
O
DS100329
0
0
–D
–O
Pin Names
7
7
DS100329-1
Data Inputs
Latch Enable Input
Output Enable Input
TRI-STATE Latch Outputs
Features
n I
n Eight latches in a single package
n TRI-STATE outputs for bus interfacing
n Outputs source/sink 24 mA
n ’ACT373 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’AC373: 5962-87555
— ’ACT373: 5962-87556
CC
Description
and I
OZ
reduced by 50%
®
IEEE/IEC
Outputs
DS100329-2
www.national.com
August 1998

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54ac373 Summary of contents

Page 1

... Octal Transparent Latch with TRI-STATE General Description The ’AC/’ACT373 consists of eight latches with TRI-STATE outputs for bus organized system applications. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup time is latched ...

Page 2

Connection Diagrams Pin Assignment for DIP and Flatpak DS100329-3 Functional Description The ’AC/’ACT373 contains eight D-type latches with TRI-STATE standard outputs. When the Latch Enable (LE) input is HIGH, data on the D inputs enters the latches this ...

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 DS100329-5 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. ...

Page 5

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

Page 6

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

Page 7

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

Page 8

8 ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier (L) 20 Lead Ceramic Dual-In-Line Package (D) NS Package Number E20A NS Package Number J20A 9 www.national.com ...

Page 10

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR ...

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