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HD74LS157 Datasheet, PDF (3/7 Pages) Hitachi Semiconductor – Quadruple 2-line-to-1-line Data Selectors/Multiplexers(noninverted outputs) | |||
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HD74LS157
Electrical Characteristics
Item
Input voltage
Symbol
VIH
VIL
min.
2.0
â
typ.*
â
â
max.
â
0.8
Unit
V
V
Output voltage
VOH
2.7
â
â
V
â
â
0.4
VOL
V
â
â
0.5
S, G
A, B
IIH
â
â
40
µA
â
â
20
S, G
Input current
A, B
IIL
â
â
â0.8
mA
â
â
â0.4
S, G
A, B
II
â
â
0.2
mA
â
â
0.1
Short-circuit output
current
IOS
â20
â
â100
mA
Supply current**
ICC
â
9.7
16
mA
Input clamp voltage
VIK
â
â
â1.5
V
Notes: * VCC = 5 V, Ta = 25°C
** ICC is measured with all outputs open and all inputs at 4.5 V.
(Ta = â20 to +75 °C)
Condition
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
IOH = â400 µA
IOL = 4 mA VCC = 4.75 V, VIH = 2 V,
IOL = 8 mA VIL = 0.8 V
VCC = 5.25 V, VI = 2.7 V
VCC = 5.25 V, VI = 0.4 V
VCC = 5.25 V, VI = 7 V
VCC = 5.25 V
VCC = 5.25 V
VCC = 4.75 V, IIN = â18 mA
Switching Characteristics
(VCC = 5 V, Ta = 25°C)
Item
Symbol Inputs Output min.
typ.
max.
Unit
Condition
tPLH
Data
Y
â
9
14
ns
tPHL
â
9
14
ns
Propagation delay time
tPLH
Strobe
Y
tPHL
â
13
20
ns
â
14
21
ns
CL = 15 pF, RL = 2 kâ¦
tPLH
Select
Y
tPHL
â
15
23
ns
â
18
27
ns
Rev.2.00, Feb.18.2005, page 3 of 6
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