SN54/74LS125A SN54/74LS126A
QUAD 3-STATE BUFFERS VCC
E
D
O
E
D
O
14
13
12
11
10
9
8
QUAD 3-STATE BUFFERS LOW POWER SCHOTTKY
1
2
3
E
D
O
4
5
6
7
E
D
O
GND
LS125A
J SUFFIX CERAMIC CASE 632-08
VCC
E
D
O
E
D
O
14
13
12
11
10
9
8
14 1
N SUFFIX PLASTIC CASE 646-06
14 1
1
2
3
4
5
6
7
E
D
O
E
D
O
GND
LS126A 14 1
D SUFFIX SOIC CASE 751A-02
TRUTH TABLES LS125A
LS126A
INPUTS
ORDERING INFORMATION
INPUTS
E
D
OUTPUT
E
D
OUTPUT
L L H
L H X
L H (Z)
H H L
L H X
L H (Z)
SN54LSXXXJ SN74LSXXXN SN74LSXXXD
Ceramic Plastic SOIC
L = LOW Voltage Level H = HIGH Voltage Level X = Don’t Care (Z) = High Impedance (off)
GUARANTEED OPERATING RANGES Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54 74
4.5 4.75
5.0 5.0
5.5 5.25
V
TA
Operating Ambient Temperature Range
54 74
– 55 0
25 25
125 70
°C
IOH
Output Current — High
54 74
– 1.0 – 2.6
mA
IOL
Output Current — Low
54 74
12 24
mA
FAST AND LS TTL DATA 5-1