MC74F157A Motorola, MC74F157A Datasheet - Page 2

• Manufacturer Part Number: MC74F157A
• Description: QUAD 2-INPUT MULTIPLEXER
• Manufacturer: Motorola

GUARANTEED OPERATING RANGES
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
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 de-
termined by the logic levels supplied to the Select input. The
logic equations for the outputs are shown below:
Z a = E (I 1a S + I 0a S)
Z c = E (I 1c S + I 0c S)
V CC
T A
I OH
I OL
V IH
V IL
V IK
V OH
V OL
I IH
I IL
I OS
I CC
t PLH
t PHL
t PLH
t PHL
t PLH
t PHL
Symbol
Symbol
Symbol
The F157A is a quad 2-input multiplexer. It selects four bits
Supply Voltage
Operating Ambient Temperature Range
Output Current — High
Output Current — Low
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
Input LOW Current
Output Short Circuit Current (Note 2)
Power Supply Current
Propagation Delay
S to Z n
Propagation Delay
E to Z n
Propagation Delay
I n to Z n
Parameter
Parameter
Parameter
74
74
FUNCTIONAL DESCRIPTION
FAST AND LS TTL DATA
MC74F157A
Min
–60
2.0
2.7
2.5
4-68
Limits
0.35
Typ
3.4
15
groups of registers to four common output busses. The partic-
ular 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 16 different
functions of two variables with one variable common. This is
useful for implementing highly irregular logic.
Z b = E (I 1b S + I 0b S)
Z d = E (I 1d S + I 0d S)
A common use of the F157A is the moving of data from two
Min
3.5
3.0
3.5
2.5
2.0
2.5
74
74
74
74
–150
Max
–1.2
–0.6
100
0.8
0.5
V CC = +5.0 V
20
23
T A = +25 C
C L = 50 pF
74F
Unit
mA
mA
mA
V
V
V
V
V
A
A
Max
Min
4.5
7.0
9.5
6.5
6.0
5.5
10
0
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
I IN = –18 mA
I OH = –1.0 mA
I OL = 20 mA
V IN = 2.7 V
V IN = 7.0 V
V IN = 0.5 V
V OUT = 0 V
All Inputs = 4.5 V
V CC = 5.0 V 10%
Typ
T A = 0 C to 70 C
Min
5.0
3.5
3.0
3.5
2.5
2.0
2.0
25
C L = 50 pF
Test Conditions
74F
Max
–1.0
Max
5.5
8.0
7.0
6.5
7.0
70
20
11
11
V CC = MIN
V CC = 4.75 V
V CC = 4.50 V
V CC = MIN
V CC = MAX
V CC = MAX
V CC = MAX
V CC = MAX
Unit
Unit
mA
mA
ns
ns
ns
V
C