Philips 74f157a, 74f158a DATASHEETS
INTEGRATED CIRCUITS
74F157A, 74F158A
Data selectors/multiplexers
Product specification
Supersedes data of 1996 Mar 12
IC15 Data Handbook
2000 Jun 30
Philips Semiconductors Product specification
74F157A, 74F158AData selectors/multiplexers
74F157A: Quad 2-input data selector/multiplexer, non-inverting
74F158A: Quad 2-input data selector/multiplexer, inverting
DESCRIPTION
The 74F157A is a high speed Quad 2-Input Multiplexer which
selects 4 bits of data from one of two sources under the control of a
common Select input (S). The Enable input (E
When E
is High, all of the outputs (Yn) are forced Low regardless of
) is active when Low.
all other input conditions.
Moving data from two registers to a common output bus is a
common use of the 74F157A. The state of the Select input
determines the particular register from which the data comes.
The device 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 input.
The 74F158A is similar, but has inverting outputs (Y
n).
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
16-pin plastic DIP N74F157AN, N174F158AN I74F157AN SOT38-4
16-pin plastic SO N74F157AD, N74F158AD I74F157AD SOT109-1
COMMERCIAL RANGE
VCC = 5V ±10%, T
= 0°C to +70°C
amb
•Industrial temperature range (–10°C to +85°C) available for
74F157A
TYPICAL
TYPE
PROPAGATION
DELA Y
74F157A 4.6ns 15mA
74F158A 3.7ns 10mA
INDUSTRIAL RANGE
VCC = 5V ±10%, T
= –40°C to +85°C
amb
TYPICAL
SUPPLY CURRENT
(TOTAL)
PKG. DWG. #
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
Ina, Inb, Inc, Ind Data inputs 1.0/1.0 20µA/0.6mA
S Select input 1.0/1.0 20µA/0.6mA
E Enable input 1.0/1.0 20µA/0.6mA
Ya–Yd Data outputs (74F157A) 50/33 1.0mA/20mA
Ya–Yd Data outputs (74F158A) 50/33 1.0mA/20mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
PIN CONFIGURATIONS, 74F157A 74F158A
I0a
I1a
I0b
I1b
S
I0a
I1a
I0b
I1b
1
2
3
Y
a
4
5
6
b
Y
1
S
2
3
4
Ya
5
6
Yb
16
15
14
13
12
11
107
98GND Yc
SF00215
V
E
I0d
I1d
Yd
I0c
I1c
CC
16
15
14
13
12
11
107
98GND Yc
SF00216
LOGIC SYMBOLS, 74F157A 74F158A
2356111014
13
2356111014
V
E
I0d
I1d
Yd
I0c
I1c
CC
13
I0a I1a I0b I1b I0c I1c I0d
1
15
VCC = Pin 16
GND = Pin 8
S
E
Ya Yb Yc Yd
47912
2000 Jun 30 853-0346 24024
I1d
SF00217
2
1
15
VCC = Pin 16
GND = Pin 8
I0a I1a I0b I1b I0c I1c I0d
S
E
Ya Yb Yc Yd
47912
I1d
SF00218
Philips Semiconductors Product specification
74F157A, 74F158AData selectors/multiplexers
IEEE/IEC SYMBOLS, 74F157A 74F158A
1
15
2
3
5
6
11
10
14
13
G1
EN
1
1
MUX
SF00219
LOGIC DIAGRAM, 74F157A
I0a I1a I0b I1b I0c I1c I0d I1d E S
2 3 5 6 11 10 14 13 15 1
1
15
4
7
9
12
2
3
5
6
11
10
14
13
G1
EN
1
1
MUX
4
7
9
12
SF00220
74F158A
I0a I1a I0b I1b I0c I1c I0d I1d E S
2 3 5 6 11 10 14 13 15 1
47912
Ya Yb Yc Yd
= Pin 16
V
CC
GND = Pin 8
FUNCTION TABLE, 74F157A
INPUTS OUTPUT
E S I0n I1n Yn
H X X X L
L H X L L
L H X H H
L L L X L
L L H X H
H = High voltage level
L = Low voltage level
X = Don’t care
2000 Jun 30
SF00225
47912
Ya Yb Yc Yd
= Pin 16
V
CC
GND = Pin 8
74F158A
INPUTS OUTPUT
E S I0n I1n Yn
H X X X H
L L L X H
L L H X L
L H X L H
L H X H L
H = High voltage level
L = Low voltage level
X = Don’t care
3
SF00226
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