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SN54/74LS151<br />
GUARANTEED OPERATING RANGES<br />
Symbol Parameter Min Typ Max Unit<br />
VCC Supply Voltage 54<br />
74<br />
TA Operating Ambient Temperature Range 54<br />
74<br />
IOH Output Current — High 54, 74 –0.4 mA<br />
IOL Output Current — Low 54<br />
74<br />
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)<br />
Limits<br />
Symbol Parameter Min Typ Max Unit Test Conditions<br />
VIH Input HIGH Voltage 2.0 V<br />
VIL<br />
Input LOW Voltage<br />
54 0.7<br />
74 0.8<br />
V<br />
4.5<br />
4.75<br />
–55<br />
0<br />
5.0<br />
5.0<br />
25<br />
25<br />
5.5<br />
5.25<br />
125<br />
70<br />
4.0<br />
8.0<br />
Guaranteed Input HIGH Voltage for<br />
All Inputs<br />
Guaranteed Input LOW Voltage for<br />
All Inputs<br />
VIK Input Clamp Dio<strong>de</strong> Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA<br />
VOH<br />
VOL<br />
IIH<br />
Output HIGH Voltage<br />
Output LOW Voltage<br />
Input HIGH Current<br />
54 2.5 3.5 V VCC = MIN, IOH = MAX, VIN = VIH<br />
74 2.7 3.5 V or VIL per Truth Table<br />
54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN,<br />
VIN = VIL or VIH<br />
74 0.35 0.5 V IOL = 8.0 mA<br />
per Truth Table<br />
20 µA VCC = MAX, VIN = 2.7 V<br />
0.1 mA VCC = MAX, VIN = 7.0 V<br />
IIL Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V<br />
IOS Short Circuit Current (Note 1) –20 –100 mA VCC = MAX<br />
ICC Power Supply Current 10 mA VCC = MAX<br />
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.<br />
AC CHARACTERISTICS (TA = 25°C)<br />
Limits<br />
Symbol Parameter Min Typ Max Unit Test Conditions<br />
tPLH<br />
tPHL<br />
tPLH<br />
tPHL<br />
tPLH<br />
tPHL<br />
tPLH<br />
tPHL<br />
tPLH<br />
tPHL<br />
tPLH<br />
tPHL<br />
Propagation Delay<br />
Select to Output Z<br />
Propagation Delay<br />
Select to Output Z<br />
Propagation Delay<br />
Enable to Output Z<br />
Propagation Delay<br />
Enable to Output Z<br />
Propagation Delay<br />
Data to Output Z<br />
Propagation Delay<br />
Data to Output Z<br />
27<br />
18<br />
14<br />
20<br />
26<br />
20<br />
15<br />
18<br />
20<br />
16<br />
13<br />
12<br />
43<br />
30<br />
23<br />
32<br />
42<br />
32<br />
24<br />
30<br />
32<br />
26<br />
21<br />
20<br />
AC WAVEFORMS<br />
ns<br />
ns<br />
ns<br />
ns<br />
ns<br />
ns<br />
VCC = 5.0 V<br />
CL = 15 pF<br />
V<br />
°C<br />
mA<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Figure 1 Figure 2<br />
FAST AND LS TTL DATA<br />
5-254