SDFS053A − MARCH 1987 − REVISED OCTOBER 1993
SN54F157A . . . J PACKAGE
SN74F157A . . . D OR N PACKAGE
(TOP VIEW)
Buffered Inputs and Outputs
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
A /B
1A
1B
1Y
2A
2B
2Y
GND
description
The ′F157A is a quadruple 2-input data
selector/multiplexer featuring a common strobe
(G) input. When the strobe is high, all outputs are
low. When the strobe is low, a 4-bit word is
selected from one of two sources and is routed to
the four outputs. The ′F157A provides true data.
The SN54F157A is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The SN74F157A is characterized for
operation from 0°C to 70°C.
A /B
A
B
OUTPUT
Y
H
X
X
X
L
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
G
4A
4B
4Y
3A
3B
3Y
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
4A
4B
NC
4Y
3A
2Y
GND
NC
3Y
3B
INPUTS
G
16
2
SN54F157A . . . FK PACKAGE
(TOP VIEW)
1B
1Y
NC
2A
2B
FUNCTION TABLE
1
1A
A/B
NC
VCC
G
•
•
NC − No internal connection
Copyright 1993, Texas Instruments Incorporated
!"#$ % &'!!($ #% )'*+$ ,#$(!,'&$% &!" $ %)(&$% )(! $.( $(!"% (/#% %$!'"($%
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• DALLAS, TEXAS 75265
• HOUSTON, TEXAS 77251−1443
POST OFFICE BOX 655303
POST OFFICE BOX 1443
2−1
SDFS053A − MARCH 1987 − REVISED OCTOBER 1993
logic symbol†
15
G
1
1B
2A
2B
3A
3B
4A
4B
1A
EN
2
G1
A /B
1A
logic diagram (positive logic)
2
1
3
4
1B
MUX
4
1
1Y
2A
5
7
6
7
9
2B
3Y
3A
14
12
13
6
9
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
4A
10
12
G
A /B
3Y
14
Pin numbers shown are for the D, J, and N packages.
4B
2Y
11
4Y
3B
1Y
5
2Y
11
10
3
13
4Y
15
1
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1.2 V to 7 V
Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA to 5 mA
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
Operating free-air temperature range: SN54F157A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74F157A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input voltage rating may be exceeded provided that the input current rating is observed.
recommended operating conditions
SN54F157A
SN74F157A
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
0.8
0.8
V
Input clamp current
−18
−18
mA
IOH
IOL
High-level output current
−1
−1
mA
Low-level output current
20
20
mA
TA
Operating free-air temperature
70
°C
2−2
High-level input voltage
2
−55
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
2
125
0
V
V
SDFS053A − MARCH 1987 − REVISED OCTOBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
II
IIH
IIL
IOS‡
ICC
SN54F157A
TYP†
MAX
TEST CONDITIONS
MIN
SN74F157A
TYP†
MAX
MIN
−1.2
VCC = 4.5 V,
VCC = 4.5 V,
II = − 18 mA
IOH = − 1 mA
VCC = 4.75 V,
VCC = 4.5 V,
IOH = − 1 mA
IOL = 20 mA
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
0.1
20
20
µA
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 0
− 0.6
− 0.6
mA
−150
mA
23
mA
2.5
3.4
−1.2
UNIT
2.5
V
2.7
0.3
−60
0.5
−150
V
3.4
0.3
−60
VCC = 5.5 V,
VI = 4.5 V
15
23
15.5
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
0.5
V
0.1
mA
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500 Ω,
TA = 25°C
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 Ω,
TA = MIN to MAX§
′F157A
tPLH
tPHL
A /B
Y
tPLH
tPHL
G
Y
tPLH
tPHL
A or B
Y
SN54F157A
UNIT
SN74F157A
MIN
TYP
MAX
MIN
MAX
MIN
MAX
3.2
6.6
10
3.2
12
3.2
11
2.2
4.6
7
2.2
9
2.2
8
4.2
6.6
9.5
4.2
13
4.2
11
1.7
4.1
6.5
1.7
7.5
1.7
7
1.7
4.1
6
1.7
7.5
1.7
6.5
1.7
3.6
5.5
1
7.5
1.2
7
ns
ns
ns
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
2−3
SDFS053A − MARCH 1987 − REVISED OCTOBER 1993
2−4
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
PACKAGE MATERIALS INFORMATION
www.ti.com
9-Aug-2022
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
K0
P1
B0 W
Reel
Diameter
Cavity
A0
B0
K0
W
P1
A0
Dimension designed to accommodate the component width
Dimension designed to accommodate the component length
Dimension designed to accommodate the component thickness
Overall width of the carrier tape
Pitch between successive cavity centers
Reel Width (W1)
QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE
Sprocket Holes
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
User Direction of Feed
Pocket Quadrants
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
SN74F157ADR
SOIC
D
16
2500
330.0
16.4
6.5
10.3
2.1
8.0
16.0
Q1
SN74F157ANSR
SO
NS
16
2000
330.0
16.4
8.2
10.5
2.5
12.0
16.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
9-Aug-2022
TAPE AND REEL BOX DIMENSIONS
Width (mm)
W
L
H
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
SN74F157ADR
SN74F157ANSR
SOIC
D
16
2500
340.5
336.1
32.0
SO
NS
16
2000
356.0
356.0
35.0
Pack Materials-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
9-Aug-2022
TUBE
T - Tube
height
L - Tube length
W - Tube
width
B - Alignment groove width
*All dimensions are nominal
Device
Package Name
Package Type
Pins
SPQ
L (mm)
SN74F157AD
D
SOIC
16
40
507
SN74F157AN
N
PDIP
16
25
506
SN74F157AN
N
PDIP
16
25
506
13.97
Pack Materials-Page 3
W (mm)
T (µm)
B (mm)
8
3940
4.32
13.97
11230
4.32
11230
4.32
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