Page 5 - EE2449_TTL_Datasheet

SN54/74LS02

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
Guaranteed Input HIGH Voltage for
V IH Input HIGH Voltage 2.0 V
All Inputs
54 0.7 Guaranteed Input LOW Voltage for
g
V Inp u t LOW V oltage V V All Inputs
Input LOW Voltage
V IL IL
74 0.8
V IK Input Clamp Diode Voltage –0.65 –1.5 V V CC = MIN, I IN = –18 mA
54 2.5 3.5 V V CC = MIN, I OH = MAX, V IN = V IH IH
IN
CC
OH
Output HIGH Voltageoltage
V OH O u tp u t HIGH V or V IL per Truth Table
V OH
74 2.7 3.5 V
54, 74 0.25 0.4 V I OL = 4.0 mA V CC = V CC MIN,
LOW

t
oltage
V

u
u
O
tp
V IN =V IL or V IHIN = V IL or V IH
V OL Output LOW Voltage V
V OL
74 0.35 0.5 V I OL = 8.0 mA per Truth Table
20 mA V CC = MAX, V IN = 2.7 V
Input HIGH Current
I I IHIH Inp u t HIGH C u rrent
0.1 mA V CC = MAX, V IN = 7.0 V
I IL Input LOW Current –0.4 mA V CC = MAX, V IN = 0.4 V
I OS Short Circuit Current (Note 1) –20 –100 mA V CC = MAX
Power Supply Current
Total, Output HIGH 3.2
CC
I CC mA V CC = MAX
CC
Total, Output LOW 5.4
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (T A = 25°C)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
t PLH Turn-Off Delay, Input to Output 10 15 ns V CC = 5.0 V
CC
t PHL Turn-On Delay, Input to Output 10 15 ns C L = 15 pF

FAST AND LS TTL DATA
5-7
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