Datasheet

5-4
FAST AND LS TTL DATA
SN54/74LS147 • SN54/74LS148 • SN54/74LS748
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
T
A
Operating Ambient Temperature Range 54
74
–55
0
25
25
125
70
°C
I
OH
Output Current — High 54, 74 –0.4 mA
I
OL
Output Current — Low 54
74
4.0
8.0
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Sbl
P
Limits
Ui
T C di i
Symbol Parameter
Min Typ Max
Unit Test Conditions
V
IH
Input HIGH Voltage 2.0 V
Guaranteed Input HIGH Voltage for
All Inputs
V
IL
Input LOW Voltage
54 0.7
V
Guaranteed Input LOW Voltage for
V
IL
I
npu
t
LOW
V
o
lt
age
74 0.8
V
pg
All Inputs
V
IK
Input Clamp Diode Voltage –0.65 –1.5 V V
CC
= MIN, I
IN
= –18 mA
V
OH
Output HIGH Voltage
54 2.5 3.5 V
V
CC
= MIN, I
OH
= MAX, V
IN
= V
IH
V
OH
O
u
t
pu
t
HIGH
V
o
lt
age
74 2.7 3.5 V
CC
,
OH
,
IN IH
or V
IL
per Truth Table
V
OL
Output LOW Voltage
54, 74 0.25 0.4 V I
OL
= 4.0 mA
V
CC
= V
CC
MIN,
V
IN
=V
IL
or V
IH
V
OL
O
u
t
pu
t
LOW
V
o
lt
age
74 0.35 0.5 V I
OL
= 8.0 mA
V
IN
=
V
IL
or
V
IH
per Truth Table
I
IH
Input HIGH Current
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
20
40
40
60
µA V
CC
= MAX, V
IN
= 2.7 V
I
IH
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
0.1
0.2
0.2
0.3
mA V
CC
= MAX, V
IN
= 7.0 V
I
IL
Input LOW Current
All Others
Input 0 (LS748)
Inputs 1–7 (LS148)
Inputs 1–7 (LS748)
–0.4
–0.8
–0.8
–1.2
mA V
CC
= MAX, V
IN
= 0.4 V
I
OS
Short Circuit Current (Note 1) –20 –100 mA V
CC
= MAX
I
CCH
Power Supply Current Output HIGH 17 mA V
CC
= MAX, All Inputs = 4.5 V
I
CCL
Output LOW 20 mA
V
CC
= MAX, Inputs 7 & E1 = GND
All Other Inputs = 4.5 V
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.