Page 1
HD74LS157
Quadruple 2-line-to-1-line Data Selectors / Multiplexers
(noninverted outputs)
REJ03D0442–0200
Rev.2.00
Feb.18.2005
This data selector / multiplexer contains inverters and drivers to supply full on-chip data selection to the four output
gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four
outputs. Then, outputs present true data to minimize propagation delay time.
Features
• Ordering Information
Part Name Package Type
HD74LS157P DILP-16 pin
HD74LS157FPEL SOP-16 pin (JEITA)
HD74LS157RPEL SOP-16 pin (JEDEC)
Note: Please consult the sales office for the above package availability.
Package Code
(Previous Code)
PRDP0016AE-B
(DP-16FV)
PRSP0016DH-B
(FP-16DAV)
PRSP0016DG-A
(FP-16DNV)
Package
Abbreviation
P —
FP EL (2,000 pcs/reel)
RP EL (2,500 pcs/reel)
Taping Abbreviation
(Quantity)
Pin Arrangement
Inputs
Output
Inputs
Output
Select
1A
1B
1Y
2A
2B
2Y
GND
161
V
S
2
3
4
5
6
7
8
1A
1B
1Y
2A
2B
2Y
(Top view)
G
4A
4B
4Y
3A
3B
3Y
15
14
13
12
11
10
9
CC
Strobe
4A
4B
4Y
3A
3B
3Y
Inputs
Output
Inputs
Output
Rev.2.00, Feb.18.2005, page 1 of 6
Page 2
HD74LS157
Function Table
Strobe Select A B 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
H ; high level, L ; low level, X ; irrelevant
Block Diagram
1A
1B
2A
Data
Inputs
2B
3A
3B
Inputs Output
1Y
2Y
Outputs
3Y
4A
4B
Strobe G
Select S
4Y
Absolute Maximum Ratings
Item Symbol Ratings Unit
V
Supply voltage
Input voltage
Power dissipation
Storage temperature
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
CC
V
IN
P
T
Tstg
7 V
7 V
400 mW
–65 to +150 °C
Recommended Operating Conditions
Item Symbol Min Typ Max Unit
V
Supply voltage
Output current
Operating temperature
CC
IOH
IOL
Topr
4.75 5.00 5.25 V
— — –400 µA
— — 8 mA
–20 25 75 °C
Rev.2.00, Feb.18.2005, page 2 of 6
Page 3
HD74LS157
Electrical Characteristics
(Ta = –20 to +75 °C)
Item Symbol min. typ.* max. Unit Condition
Input voltage
Output voltage
S, G — — 40
A, B
Input current
S, G — — –0.8
A, B
S, G — — 0.2
A, B
Short-circuit output
current
Supply current** ICC — 9.7 16 mA VCC = 5.25 V
Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA
Notes: * VCC = 5 V, Ta = 25°C
** I
is measured with all outputs open and all inputs at 4.5 V.
CC
VIH 2.0 — — V
VIL — — 0.8 V
VOH 2.7 — — V
V
OL
IIH
IIL
I
I
— — 0.4 IOL = 4 mA
— — 0.5
— — 20
— — –0.4
— — 0.1
µA VCC = 5.25 V, VI = 2.7 V
mA VCC = 5.25 V, VI = 0.4 V
mA VCC = 5.25 V, VI = 7 V
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
= –400 µA
I
OH
V
IOL = 8 mA
IOS –20 — –100 mA VCC = 5.25 V
VCC = 4.75 V, VIH = 2 V,
= 0.8 V
V
IL
Switching Characteristics
Item Symbol Inputs Output min. typ. max. Unit Condition
t
— 9 14 ns
PLH
t
PHL
t
— 13 20 ns
Propagation delay time
PLH
t
PHL
t
— 15 23 ns
PLH
t
PHL
Data Y
Strobe Y
Select Y
(VCC = 5 V, Ta = 25°C)
— 9 14 ns
— 14 21 ns
— 18 27 ns
CL = 15 pF, RL = 2 kΩ
Rev.2.00, Feb.18.2005, page 3 of 6
Page 4
HD74LS157
Testing Method
Test Circuit
4.5V
1A
Input
P.G.
Z
out
= 50Ω
1B
2A
2B
3A
3B
4A
4B
See Function Table
G
S
Notes: 1. CL includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Waveform
V
CC
Output
Load circuit 1
R
L
1Y
C
L
Output
2Y
Same as Load Circuit 1.
Output
3Y
Same as Load Circuit 1.
Output
4Y
Same as Load Circuit 1.
Input
In phase output
Out of phase output
Note: Input pulse; t
≤ 15 ns, t
TLH
10%
90%
1.3 V
t
THL
t
TLH
90%
1.3 V
10%
t
PLH
1.3 V 1.3 V
t
PHL
1.3 V 1.3 V
≤ 6 ns, PRR = 1 MHz, duty cycle 50%.
THL
t
PHL
t
PLH
3 V
0 V
V
V
V
V
OH
OL
OH
OL
Rev.2.00, Feb.18.2005, page 4 of 6
Page 5
HD74LS157
Package Dimensions
RENESAS CodeJEITA Package Code Previous Code
PRDP0016AE-BP-DIP16-6.3x19.2-2.54
16 9
MASS[Typ.]
DP-16FV
D
1.05g
E
1 8
0.89
Z
P-SOP16-5.5x10.06-1.27 PRSP0016DH-B
*1
D
16 9
b
3
A
1
A
L
b
e c
RENESAS CodeJEITA Package Code Previous Code
p
FP-16DAV
MASS[Typ.]
0.24g
F
θ
e
1
( Ni/Pd/Au plating )
Reference
Symbol
e
1
D
E
A
A
1
b
p
b
3
c
θ
e
Z
L
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
Dimension in Millimeters
0.51
0.40 0.48
0.19 0.25 0.31
°
0
2.29 2.54 2.79
2.54
7.62
19.2
6.3
1.30
MaxNomMin
20.32
7.4
5.06
0.56
15
1.12
°
Index mark
Z
e
*3
Rev.2.00, Feb.18.2005, page 5 of 6
b
p
E
E
H
*2
Terminal cross section
( Ni/Pd/Au plating )
81
b
p
xM
A
y
1
A
Detail F
c
Dimension in Millimeters
Reference
Symbol
D
E
A
2
A
1
L
1
θ
L
A
b
p
b
1
c
c
1
0
°
θ
H
7.50 8.00
E
e
x
y
Z
L
L
1
10.06
5.50
0.400.34
7.80
1.27
1.15
MaxNomMin
10.5
0.200.100.00
2.20
0.46
0.250.200.15
0.12
0.15
0.80
0.900.700.50
8
°
Page 6
HD74LS157
P-SOP16-3.95x9.9-1.27 PRSP0016DG-A
Index mark
1
Zb
RENESAS CodeJEITA Package Code Previous Code
*1
D
e
FP-16DNV
916
E
*2
*3
p
8
xM
MASS[Typ.]
E
H
A
y
0.15g
F
Terminal cross section
( Ni/Pd/Au plating )
1
A
Detail F
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
b
p
c
L
1
L
Dimension in Millimeters
Reference
Symbol
D
E
A
2
A
1
A
b
p
b
1
c
c
1
0
°
θ
5.80 6.20
H
E
e
θ
x
y
Z
L
L
1
9.90
3.95
0.400.34
6.10
1.27
1.08
MaxNomMin
10.30
0.250.140.10
1.75
0.46
0.250.200.15
8
0.25
0.15
0.635
1.270.600.40
°
Rev.2.00, Feb.18.2005, page 6 of 6
Page 7
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