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National Semiconductor Electronic Components Datasheet

74F157ASJ Datasheet

Quad 2-Input Multiplexer

No Preview Available !

74F157ASJ pdf
November 1994
54F 74F157A
Quad 2-Input Multiplexer
General Description
The ’F157A is a high-speed quad 2-input multiplexer Four
bits of data from two sources can be selected using the
common Select and Enable inputs The four outputs present
the selected data in the true (non-inverted) form The
’F157A can also be used to generate any four of the 16
different functions to two variables
Features
Y Guaranteed 4000V minimum ESD protection
Commercial
74F157APC
74F157ASC (Note 1)
74F157ASJ (Note 1)
Military
54F157ADM (Note 2)
54F157AFM (Note 2)
54F157ALM (Note 2)
Package
Number
N16E
J16A
M16A
M16D
W16A
E20A
Package Description
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead (0 150 Wide) Molded Small Outline JEDEC
16-Lead (0 300 Wide) Molded Small Outline EIAJ
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX and SJX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
Pin Assignment
for LCC
IEEE IEC
TL F 9483–3
TL F 9483 – 1
TL F 9483 – 2
TL F 9483–5
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9483
RRD-B30M75 Printed in U S A



National Semiconductor Electronic Components Datasheet

74F157ASJ Datasheet

Quad 2-Input Multiplexer

No Preview Available !

74F157ASJ pdf
Unit Loading Fan Out
Pin Names
Description
I0a – I0d
I1a – I1d
E
S
Za – Zd
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input (Active LOW)
Select Input
Outputs
54F 74F
UL
HIGH LOW
10 10
10 10
10 10
10 10
50 33 3
Input IIH IIL
Output IOH IOL
20 mA b0 6 mA
20 mA b0 6 mA
20 mA b0 6 mA
20 mA b0 6 mA
b1 mA 20 mA
Functional Description
The ’F157A is a quad 2-input multiplexer It selects four bits
of data from two sources under the control of a common
Select input (S) The Enable input (E) is active LOW When
E is HIGH all of the outputs (Z) are forced LOW regardless
of all other inputs The ’F157A is the logic implementation of
a 4-pole 2-position switch where the position of the switch
is determined by the logic levels supplied to the Select in-
put The logic equations for the outputs are shown below
Zn e E  (I1n S a I0n S)
A common use of the ’F157A is the moving of data from two
groups of registers to four common output busses The par-
ticular register from which the data comes is determined by
the state of the Select input A less obvious use is as a
function generator The ’F157A can generate any four of the
Logic Diagram
16 different functions of two variables with one variable
common This is useful for implementing highly irregular
logic
Truth Table
Inputs
E S I0
HXX
L HX
L HX
LLL
L LH
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Output
I1 Z
XL
LL
HH
XL
XH
TL F 9483 – 4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2



National Semiconductor Electronic Components Datasheet

74F157ASJ Datasheet

Quad 2-Input Multiplexer

No Preview Available !

74F157ASJ pdf
Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Storage Temperature
b65 C to a150 C
Ambient Temperature under Bias
b55 C to a125 C
Junction Temperature under Bias
Plastic
b55 C to a175 C
b55 C to a150 C
VCC Pin Potential to
Ground Pin
b0 5V to a7 0V
Input Voltage (Note 2)
b0 5V to a7 0V
Input Current (Note 2)
b30 mA to a5 0 mA
Voltage Applied to Output
in HIGH State (with VCC e 0V)
Standard Output
TRI-STATE Output
b0 5V to VCC
b0 5V to a5 5V
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated IOL (mA)
4000V
Note 1 Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired Functional operation under
these conditions is not implied
Note 2 Either voltage limit or current limit is sufficient to protect inputs
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Commercial
b55 C to a125 C
0 C to a70 C
Supply Voltage
Military
Commercial
a4 5V to a5 5V
a4 5V to a5 5V
DC Electrical Characteristics
Symbol
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
ICEX
VID
IOD
IIL
IOS
ICCH
ICCL
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW
Voltage
Input HIGH
Current
54F 10% VCC
74F 10% VCC
74F 5% VCC
54F 10% VCC
74F 10% VCC
54F
74F
Input HIGH Current
Breakdown Test
54F
74F
Output HIGH
Leakage Current
54F
74F
Input Leakage
Test
74F
Output Leakage
Circuit Current
74F
Input LOW Current
Output Short-Circuit Current
Power Supply Current
Power Supply Current
54F 74F
Min Typ Max
20
08
b1 2
25
25
27
05
05
20 0
50
100
70
250
50
4 75
3 75
b0 6
b60
b150
15 23
15 23
Units
V
V
V
V
V
mA
mA
mA
V
mA
mA
mA
mA
mA
VCC
Min
Min
Min
Max
Max
Max
00
00
Max
Max
Max
Max
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
IIN e b18 mA
IOH e b1 mA
IOH e b1 mA
IOH e b1 mA
IOL e 20 mA
IOL e 20 mA
VIN e 2 7V
VIN e 7 0V
VOUT e VCC
IID e 1 9 mA
All Other Pins Grounded
VIOD e 150 mV
All Other Pins Grounded
VIN e 0 5V
VOUT e 0V
VO e HIGH
VO e LOW
3




Part Number 74F157ASJ
Description Quad 2-Input Multiplexer
Maker National Semiconductor
Total Page 8 Pages
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74F157ASJ pdf
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