Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6 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
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
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
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
VIH Input HIGH Voltage 2.0 VGuaranteed 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 T ruth Table
VO
Out
p
ut LOW Voltage
0.25 0.4 V IOL = 12 mA VCC = VCC MIN,
VIN =V
IL or VIH
V
OL
O
u
tp
u
t
LOW
Voltage
0.35 0.5 V IOL = 24 mA
V
IN =
V
IL
or
V
IH
per T ruth 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
I
In
p
ut HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
I
IH
Inp
u
t
HIGH
C
u
rrent
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 1) –40 –225 mA VCC = MAX
ICC
Power Su
pp
ly Current
LS125A 20
mA
VCC = MAX
VIN = 0 V, VE = 4.5 V
I
CC
Po
w
er
S
u
ppl
y
C
u
rrent
LS126A 22
mA
V
CC =
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 (TA = 25°C)
Limits
Symbol Parameter Min Typ Max Unit T est Conditions
tPLH LS125A 9.0 15
tPLH Propagation Delay, LS126A 9.0 15
ns
Figure 2
tPHL
gy
Data to Output LS125A 7.0 18
ns
Fig
u
re
2
tPHL LS126A 8.0 18 VCC = 5.0 V
CL=45
p
F
t
Output Enable T ime LS125A 12 20
ns
Figures 4 5
C
L =
45
F
RL = 667 Ω
t
PZH to HIGH Level LS126A 16 25
ns
Fig
u
res
4
,
5
t
Output Enable T ime LS125A 15 25
ns
Figures 3 5
t
PZL to LOW Level LS126A 21 35
ns
Fig
u
res
3
,
5
t
Output Disable T ime LS125A 20
ns
Figures 4 5
t
PHZ from HIGH Level LS126A 25
ns
Fig
u
res
4
,
5
VCC = 5.0 V
CL=50
p
F
t
Output Disable T ime LS125A 20
ns
FIgures 3 5
C
L =
5
.
0
F
RL = 667 Ω
t
PLZ from LOW Level LS126A 25
ns
FIg
u
res
3
,
5
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
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
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “T ypicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or
death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold
SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable
attorney fees arising out of, directly or indirectly , any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Af firmative Action Employer.
PUBLICATION ORDERING INFORMATION
ASIA/PACIFIC: LDC for ON Semiconductor – Asia Support
Phone: 303–675–2121 (Tue–Fri 9:00am to 1:00pm, Hong Kong Time)
Toll Free from Hong Kong 800–4422–3781
Email: ONlit–asia@hibbertco.com
JAPAN: ON Semiconductor , Japan Customer Focus Center
4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549
Phone: 81–3–5487–8345
Email: r14153@onsemi.com
Fax Response Line: 303–675–2167
800–344–3810 Toll Free USA/Canada
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
SN74LS125A/D
North America Literature Fulfillment:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303–675–2175 or 800–344–3860 Toll Free USA/Canada
Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada
Email: ONlit@hibbertco.com
N. American Technical Support: 800–282–9855 Toll Free USA/Canada
EUROPE: LDC for ON Semiconductor – European Support
German Phone: (+1) 303–308–7140 (M–F 2:30pm to 5:00pm Munich Time)
Email: ONlit–german@hibbertco.com
French Phone: (+1) 303–308–7141 (M–F 2:30pm to 5:00pm Toulouse T ime)
Email: ONlit–french@hibbertco.com
English Phone: (+1) 303–308–7142 (M–F 1:30pm to 5:00pm UK T ime)
Email: ONlit@hibbertco.com
