2024年3月29日发(作者：)
元器件交易网
QUAD 3-STATE BUFFERS
V
CC
14
E
13
D
12
O
11
E
10
D
9
O
8
1
E
2
D
3
O
4
E
5
D
6
O
7
GND
LS125A
V
CC
14
E
13
D
12
O
11
E
10
D
9
O
8
1
E
2
D
3
O
4
E
5
D
6
O
7
GND
LS126A
TRUTH TABLES
LS125A
INPUTS
E
L
L
H
D
L
H
X
OUTPUT
L
H
(Z)
INPUTS
E
H
H
L
D
L
H
X
OUTPUT
L
H
(Z)
LS126A
L = LOW Voltage Level
H = HIGH Voltage Level
X = Don’t Care
(Z) = High Impedance (off)
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
Supply Voltage
Operating Ambient Temperature Range
Output Current — High
Output Current — Low
Parameter
54
74
54
74
54
74
54
74
Min
4.5
4.75
–55
0
Typ
5.0
5.0
25
25
Max
5.5
5.25
125
70
–1.0
–2.6
12
24
Unit
V
°C
mA
mA
FAST AND LS TTL DATA
5-207
元器件交易网
SN54/74LS125A • SN54/74LS126A
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
V
IH
V
IL
V
IK
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
54
74
54,74
V
OL
I
OZH
I
OZL
I
IH
I
IL
I
OS
I
CC
Output LOW Voltage
74
Output Off Current HIGH
Output Off Current LOW
Input HIGH Current
Input LOW Current
Short Circuit Current (Note 1)
Power Supply Current
LS125A
LS126A
–40
0.350.5
20
–20
20
0.1
–0.4
–225
20
22
V
µA
µA
µA
mA
mA
mA
mA
2.4
2.4
0.250.4
54
74
–0.65
Min
2.0
0.7
0.8
–1.5
TypMax
Unit
V
V
V
V
V
V
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
Guaranteed Input LOW Voltage for
All Inputs
V
CC
= MIN, I
IN
= –18 mA
V
CC
= MIN, I
OH
= MAX, V
IN
= V
IH
or V
IL
per Truth Table
I
OL
= 12 mA
I
OL
= 24 mA
V
CC
= V
CC
MIN,
V
IN
= V
IL
or V
IH
per Truth Table
V
CC
= MAX, V
OUT
= 2.4 V
V
CC
= MAX, V
OUT
= 0.4 V
V
CC
= MAX, V
IN
= 2.7 V
V
CC
= MAX, V
IN
= 7.0 V
V
CC
= MAX, V
IN
= 0.4 V
V
CC
= MAX
V
CC
= MAX
V
IN
= 0 V, V
E
= 4.5 V
V
IN
= 0 V, V
E
= 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
t
PLH
t
PLH
t
PHL
t
PHL
t
PZH
Output Enable Time
to HIGH Level
Output Enable Time
to LOW Level
Output Disable Time
from HIGH Level
Output Disable Time
from LOW Level
Propagation Delay,
Data to Output
Parameter
LS125A
LS126A
LS125A
LS126A
LS125A
LS126A
LS125A
LS126A
LS125A
LS126A
LS125A
LS126A
MinTyp
9.0
9.0
7.0
8.0
12
16
15
21
Max
15
15
18
18
20
25
25
35
20
25
20
25
nsFigures 4, 5
nsFigure 2
V
CC
= 5.0 V
C
L
= 45 pF
R
L
= 667 Ω
UnitTest Conditions
t
PZL
nsFigures 3, 5
t
PHZ
nsFigures 4, 5
t
PLZ
nsFIgures 3, 5
V
CC
= 5.0 V
C
L
= 5.0 pF
R
L
= 667 Ω
FAST AND LS TTL DATA
5-208
元器件交易网
SN54/74LS125A • SN54/74LS126A
V
IN
V
IN
t
PHL
1.3 V
V
OUT
1.3 V
t
PLH
1.3 V
1.3 V
1.3 V
t
PHL
1.3 V
1.3 V
t
PLH
1.3 V
V
OUT
Figure 1
V
E
V
E
1.3 V
t
PZL
V
OUT
1.3 V
0.5 V
1.3 V
t
PLZ
≈1.3 V
V
OL
V
E
V
E
1.3 V
t
PZH
V
OUT
Figure 2
1.3 V
t
PHZ
> V
OH
≈1.3 V
0.5 V
1.3 V
Figure 3Figure 4
V
CC
R
L
SW1
TO OUTPUT
UNDER TEST
5 kΩ
C
L
SW2
Figure 5
SWITCH POSITIONS
SYMBOL
t
PZH
t
PZL
t
PLZ
t
PHZ
SW1
Open
Closed
Closed
Closed
SW2
Closed
Open
Closed
Closed
FAST AND LS TTL DATA
5-209
元器件交易网
Case 751A-02 D Suffix
14-Pin Plastic
SO-14
-A-
148
NOTES:
IONS
发布评论