Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1 Publication Order Number:
SN74LS125A/D
SN74LS125A SN74LS126A
Quad 3-State Buffers
LS125A
14 13 12 11 10 9
123456
V
CC
8
7
GND
E DOE DO
DOE
DOE
LS126A
14 13 12 11 10 9
123456
V
CC
8
7
GND
EDOEDO
DOEDOE
TRUTH TABLES
LS125A LS126A
INPUTS INPUTS
E D OUTPUT E D OUTPUT
L L L H L L
L H H H H H
H X (Z) L X (Z)
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
V
CC
Supply Voltage 4.75 5.0 5.25 V
T
A
Operating Ambient
T emperature Range
0 25 70 °C
I
OH
Output Current – High –2.6 mA
I
OL
Output Current – Low 24 mA
LOW
POWER
SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS125AN 14 Pin DIP 2000 Units/Box
SN74LS125AD 14 Pin
SOIC
D SUFFIX
CASE 751A
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 646
14
1
14
1
SN74LS126AN 14 Pin DIP
SN74LS126AD 14 Pin
2000 Units/Box
2500/Tape & Reel
SN74LS125A SN74LS126A
http://onsemi.com
2
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
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
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
V
IK
Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
V
OH
Output HIGH Voltage
2.4 V VCC = MIN, IOH = MAX, VIN = V
IH
or VIL per Truth Table
0.25 0.4 V IOL = 12 mA
VCC = VCC MIN,
IH
per Truth Table
I
OZH
Output Off Current HIGH 20 µA VCC = MAX, V
OUT
= 2.4 V
I
OZL
Output Off Current LOW –20 µA VCC = MAX, V
OUT
= 0.4 V
20 µA VCC = MAX, VIN = 2.7 V
0.1 mA VCC = MAX, VIN = 7.0 V
I
IL
Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V
I
OS
Short Circuit Current (Note 1) –40 –225 mA VCC = MAX
VIN = 0 V, VE = 0 V
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
LS125A 9.0 15
t
PLH
Propagation Delay,
LS126A 9.0 15
Data to Output
LS125A 7.0 18
t
PHL
LS126A 8.0 18
VCC = 5.0 V
Output Enable Time
LS125A 12 20
PZH
to HIGH Level
LS126A 16 25
Output Enable Time
LS125A 15 25
PZL
to LOW Level
LS126A 21 35
Output Disable Time
LS125A 20
PHZ
from HIGH Level
LS126A 25
Output Disable Time
LS125A 20
PLZ
from LOW Level
LS126A 25