Page 19 - EE2449_TTL_Datasheet

SN54/74LS76A

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
u
t
V Input LOW Voltage V V
Inp
V
oltage

LOW
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 IH IH
Output HIGH Voltageoltage
V O u tp u t HIGH V CC OH IN
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,
V O u tp u t LOW V oltage V
Output LOW Voltage
V IN =V IL or V IHIN = V IL or V IH
V OLOL
74 0.35 0.5 V I OL = 8.0 mA per Truth Table
J, K 20
Clear 60 mA V CC = MAX, V IN = 2.7 V
Clock 80
I I IHIH Inp u t HIGH C u rrent
Input HIGH Current
J, K 0.1
Clear 0.3 mA V CC = MAX, V IN = 7.0 V
Clock 0.4
J, K –0.4
I IL Input LOW Current mA V CC = MAX, V IN = 0.4 V
Clear, Clock –0.8
I OS Short Circuit Current (Note 1) –20 –100 mA V CC = MAX
I CC Power Supply Current 6.0 mA V CC = MAX
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, V CC = 5.0 V)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
f MAX Maximum Clock Frequency 30 45 MHz
5 0 V
V V CC = 5.0 V
15 20 ns
t PLH C L = 15 pFC L 15 F
PLH
Clear
,
Set
Clock Clear Set to Output t
Clock
,

u
O
u
tp
to

t PHL 15 20 ns
AC SETUP REQUIREMENTS (T A = 25°C)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
t W Clock Pulse Width High 20 ns
t W Clear Set Pulse Width 25 ns
V CC =5 0VV
=
.

0
5
V CC
t s Setup Time 20 ns
t h Hold Time 0 ns
FAST AND LS TTL DATA
5-79
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