54FCT138 NSC [National Semiconductor], 54FCT138 Datasheet

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54FCT138

Manufacturer Part Number
54FCT138
Description
1-of-8 Decoder/Demultiplexer
Manufacturer
NSC [National Semiconductor]
Datasheet

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© 1999 National Semiconductor Corporation
54FCT138
1-of-8 Decoder/Demultiplexer
General Description
The FCT138 is a high-speed 1-of-8 decoder/demultiplexer.
This device is ideally suited for high-speed bipolar memory
chip select address decoding. The multiple input enables al-
low parallel expansion to a 1-of-24 decoder using just three
FCT138 devices or a 1-of-32 decoder using four FCT138 de-
vices and one inverter.
Ordering Code
Logic Symbols
FACT
A
E
E
O
54FCT138DMQB
54FCT138FMQB
54FCT138LMQB
Pin Names
0
1
3
0
–A
–E
–O
®
is a registered trademark of Fairchild Semiconductor Corporation.
2
2
7
Military
Address Inputs
Enable Inputs
Enable Input
Outputs
Description
IEEE/IEC
DS100963-7
DS100963
DS100963-1
J16A
W16A
E20A
Package
Number
16-Lead Ceramic Dual-In-Line
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier, Type C
Features
n Demultiplexing capability
n Multiple input enable for easy expansion
n Active LOW mutually exclusive outputs
n Outputs sink capability of 32mA, source capability of
n TTL input and output level compatible
n CMOS power consumption
n Standard Microcircuit Drawing (SMD) 5962-8765401
Connection Diagrams
12mA
Package Description
for DIP and Flatpak
Pin Assignment
Pin Assignment
for LCC
DS100963-2
DS100963-3
October 1999
www.national.com

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54FCT138 Summary of contents

Page 1

... The multiple input enables al- low parallel expansion to a 1-of-24 decoder using just three FCT138 devices or a 1-of-32 decoder using four FCT138 de- vices and one inverter. Ordering Code Military 54FCT138DMQB 54FCT138FMQB 54FCT138LMQB Logic Symbols IEEE/IEC DS100963-7 Pin Names Description A –A ...

Page 2

Functional Description The FCT138 high-speed 1-of-8 decoder/demultiplexer ac- cepts three binary weighted inputs ( enabled, provides eight mutually exclusive active-LOW out- puts (O –O ). The FCT138 features three Enable inputs two active-LOW (E , ...

Page 3

Logic Diagram (Continued) 3 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. Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Ceramic V Pin Potential to CC Ground Pin Input ...

Page 5

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

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier (L) www.national.com NS Package Number E20A 16 Lead Ceramic Dual-In-Line Package (D) NS Package Number J16A 6 ...

Page 7

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 DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL ...

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