Page 30 - EE2449_TTL_Datasheet

SN54/74LS90 • SN54/74LS92 • SN54/74LS93

GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V CC Supply Voltage 54 4.5 5.0 5.5 V
74 4.75 5.0 5.25

T A Operating Ambient Temperature Range 54 –55 25 125 °C
74 0 25 70
I OH Output Current — High 54, 74 –0.4 mA
I OL Output Current — Low 54 4.0 mA
74 8.0

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
Input LOW Voltage
V Inp u t LOW V oltage V V
V ILIL
74 0.8 All Inputs
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 IHCC
V O u tp u t HIGH V OH IN IH
Output HIGH Voltageoltage
V OHOH
74 2.7 3.5 V or V IL per Truth Table
54, 74 0.25 0.4 V I OL = 4.0 mA V CC = V CC MIN,
Output LOW Voltage
V IN =V IL or V IHIN = V IL or V IH
V OL O u tp u t LOW V oltage 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
rrent
u
t
I I IH IH Input HIGH Current
Inp

u
C
HIGH

0.1 mA V CC = MAX, V IN = 7.0 V
Input LOW Current
MS, MR –0.4
I IL CP 0 –2.4 mA V CC = MAX, V IN = 0.4 V
CP 1 (LS90, LS92) –3.2
CP 1 (LS93) –1.6
I OS Short Circuit Current (Note 1) –20 –100 mA V CC = MAX
I CC Power Supply Current 15 mA V CC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.

FAST AND LS TTL DATA
5-93
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