SN54LS42J Ver la hoja de datos (PDF) - Motorola => Freescale
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SN54LS42J Datasheet PDF : 3 Pages
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SN54 / 74LS42
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
54
VIL
Input LOW Voltage
74
0.7
Guaranteed Input LOW Voltage for
0.8
V
All Inputs
VIK
Input Clamp Diode Voltage
54
VOH
Output HIGH Voltage
74
– 0.65
– 1.5
2.5
3.5
2.7
3.5
V
VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
V
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
74
0.25
0.4
0.35
0.5
V
IOL = 4.0 mA VCC = VCC MIN,
VIN = VIL or VIH
V
IOL = 8.0 mA per Truth Table
20
IIH
Input HIGH Current
0.1
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
– 20
ICC
Power Supply Current
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
– 0.4
–100
13
µA
VCC = MAX, VIN = 2.7 V
mA
VCC = MAX, VIN = 7.0 V
mA
VCC = MAX, VIN = 0.4 V
mA
VCC = MAX
mA
VCC = MAX
AC CHARACTERISTICS (TA = 25°C)
Symbol
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay
(2 Levels)
Propagation Delay
(3 Levels)
Limits
Min
Typ
Max
15
25
15
25
20
30
20
30
Unit
Test Conditions
ns
Figure 2
ns
Figure 1
VCC = 5.0 V
CL = 15 pF
AC WAVEFORMS
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 1
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 2
FAST AND LS TTL DATA
5-3
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