Semiconductor Components Industries, LLC, 2001
October, 2001 – Rev. 7 1Publication Order Number:
SN74LS125A/D
SN74LS125A, SN74LS126A
Quad 3-State Buffers
LS125A
14 13 12 11 10 9
123456
VCC
8
7
GND
EDOE DO
DOEDOE
LS126A
14 13 12 11 10 9
123456
VCC
8
7
GND
EDOE DO
DOED OE
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
VCC Supply Voltage 4.75 5.0 5.25 V
TAOperating Ambient
Temperature Range 0 25 70 °C
IOH Output Current – High –2.6 mA
IOL Output Current – Low 24 mA
LOW
POWER
SCHOTTKY
SOIC
D SUFFIX
CASE 751A
PLASTIC
N SUFFIX
CASE 646
14
1
14
1
SOEIAJ
M SUFFIX
CASE 965
14 1
Device Package Shipping
ORDERING INFORMATION
SN74LS125AN 14 Pin DIP 2000 Units/Box
SN74LS125AD SOIC–14 55 Units/Rail
SN74LS125ADR2 SOIC–14 2500/Tape & Reel
SN74LS125AM SOEIAJ–14 See Note 1
SN74LS125AMEL SOEIAJ–14
1. For ordering information on the EIAJ version of
the SOIC package, please contact your local
ON Semiconductor representative.
See Note 1
14 Pin DIP 2000 Units/Box
SN74LS126AD SOIC–14 55 Units/Rail
SN74LS126ADR2 SOIC–14 2500/Tape & Reel
SN74LS126AM SOEIAJ–14 See Note 1
SN74LS126AMEL SOEIAJ–14 See Note 1
SN74LS126AN
http://onsemi.com
SN74LS125A, SN74LS126A
http://onsemi.com
2
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage 0.8 VGuaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
VOH Output HIGH Voltage 2.4 V VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Out
p
ut LOW Voltage
0.25 0.4 V IOL = 12 mA VCC = VCC MIN,
VIN VIL or VIH
VOL Output LOW Voltage 0.35 0.5 V IOL = 24 mA VIN = VIL or VIH
per Truth Table
IOZH Output Off Current HIGH 20 µA VCC = MAX, VOUT = 2.4 V
IOZL Output Off Current LOW –20 µA VCC = MAX, VOUT = 0.4 V
IIH
In
p
ut HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
IIH Input HIGH Current 0.1 mA VCC = MAX, VIN = 7.0 V
IIL Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V
IOS Short Circuit Current (Note 2) –40 –225 mA VCC = MAX
ICC
Power Su
pp
ly Current
LS125A 20
mA
VCC = MAX
VIN = 0 V, VE = 4.5 V
ICC Power Supply Current LS126A 22 mA VCC = MAX VIN = 0 V, VE = 0 V
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
tPLH LS125A 9.0 15
tPLH Propa
g
ation Dela
y
,LS126A 9.0 15
ns
Figure 2
tPHL
Pro agation
Delay
,
Data to Output LS125A 7.0 18 ns Figure 2
tPHL LS126A 8.0 18 VCC = 5.0 V
CL45
p
F
tPZH
Output Enable Time LS125A 12 20
ns
Figures 4 5
CL = 45 pF
RL = 667 Ω
tPZH
Out ut
Enable
Time
to HIGH Level LS126A 16 25 ns Figures 4, 5
RL
=
667
Ω
tPZL
Output Enable Time LS125A 15 25
ns
Figures 3 5
tPZL
Out ut
Enable
Time
to LOW Level LS126A 21 35 ns Figures 3, 5
tPHZ
Output Disable Time LS125A 20
ns
Figures 4 5
tPHZ
Out ut
Disable
Time
from HIGH Level LS126A 25 ns Figures 4, 5 VCC = 5.0 V
CL50
p
F
tPLZ
Output Disable Time LS125A 20
ns
FIgures 3 5
CL = 5.0 pF
RL = 667 Ω
tPLZ
Out ut
Disable
Time
from LOW Level LS126A 25 ns FIgures 3, 5
RL
=
667
Ω
SN74LS125A, SN74LS126A
http://onsemi.com
3
Figure 1. Figure 2.
Figure 3. Figure 4.
VIN
VOUT
1.3 V 1.3 V
tPLH tPHL
1.3 V 1.3 V
VIN
VOUT
1.3 V
1.3 V
tPHL
1.3 V
tPLH
1.3 V
VE
VE
VOUT
1.3 V
tPZL
1.3 V
tPLZ
1.3 V ≈ 1.3 V
VOL
0.5 V
VE
VOUT
1.3 V
tPZH
1.3 V
1.3 V
tPHZ > VOH
≈ 1.3 V
0.5 V
VE
Figure 5.
VCC
RL
SW1
TO OUTPUT
UNDER TEST
CL
5 kΩ
SW2
SWITCH POSITIONS
SYMBOL SW1 SW2
tPZH Open Closed
tPZL Closed Open
tPLZ Closed Closed
tPHZ Closed Closed
SN74LS125A, SN74LS126A
http://onsemi.com
4
PACKAGE DIMENSIONS
17
14 8
B
A
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.715 0.770 18.16 18.80
B0.240 0.260 6.10 6.60
C0.145 0.185 3.69 4.69
D0.015 0.021 0.38 0.53
F0.040 0.070 1.02 1.78
G0.100 BSC 2.54 BSC
H0.052 0.095 1.32 2.41
J0.008 0.015 0.20 0.38
K0.115 0.135 2.92 3.43
L
M--- 10 --- 10
N0.015 0.039 0.38 1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
F
HG DK
C
SEATING
PLANE
N
–T–
14 PL
M
0.13 (0.005)
L
M
J0.290 0.310 7.37 7.87
N SUFFIX
PLASTIC PACKAGE
CASE 646–06
ISSUE M
SN74LS125A, SN74LS126A
http://onsemi.com
5
PACKAGE DIMENSIONS
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
–A–
–B–
G
P7 PL
14 8
71 M
0.25 (0.010) B M
S
B
M
0.25 (0.010) A S
T
–T–
F
RX 45
SEATING
PLANE D14 PL K
C
J
M
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A8.55 8.75 0.337 0.344
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.228 0.244
R0.25 0.50 0.010 0.019
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751A–03
ISSUE F
SN74LS125A, SN74LS126A
http://onsemi.com
6
PACKAGE DIMENSIONS
HE
A1
DIM MIN MAX MIN MAX
INCHES
--- 2.05 --- 0.081
MILLIMETERS
0.05 0.20 0.002 0.008
0.35 0.50 0.014 0.020
0.18 0.27 0.007 0.011
9.90 10.50 0.390 0.413
5.10 5.45 0.201 0.215
1.27 BSC 0.050 BSC
7.40 8.20 0.291 0.323
0.50 0.85 0.020 0.033
1.10 1.50 0.043 0.059
0
0.70 0.90 0.028 0.035
--- 1.42 --- 0.056
A1
HE
Q1
LE
10 0
10
LEQ1
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
0.13 (0.005) M0.10 (0.004)
D
Z
E
1
14 8
7
eA
b
VIEW P
c
L
DETAIL P
M
A
b
c
D
E
e
0.50
M
Z
M SUFFIX
SOEIAJ PACKAGE
CASE 965–01
ISSUE O
SN74LS125A, SN74LS126A
http://onsemi.com
7
Notes
SN74LS125A, SN74LS126A
http://onsemi.com
8
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without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
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including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
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Phone: 81–3–5740–2700
Email: r14525@onsemi.com
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For additional information, please contact your local
Sales Representative.
SN74LS125A/D
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