74HC125; 74HCT125
Quad buffer/line driver; 3-state
Rev. 4 — 10 January 2013
Product data sheet
1. General description
The 74HC125; 74HCT125 is a quad buffer/line driver with 3-state outputs controlled by
the output enable inputs (nOE). A HIGH on nOE causes the outputs to assume a high
impedance OFF-state. Inputs include clamp diodes. This enables the use of current
limiting resistors to interface inputs to voltages in excess of V
CC
.
2. Features and benefits
Complies with JEDEC standard no. 7A
Input levels:
The 74HC125: CMOS levels
The 74HCT125: TTL levels
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from
40 C
to +85
C
and from
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74HC125N
74HCT125N
74HC125D
74HCT125D
74HC125DB
74HCT125DB
74HC125PW
74HCT125PW
40 C
to +125
C
TSSOP14
40 C
to +125
C
SSOP14
40 C
to +125
C
SO14
plastic small outline package; 14 leads; body width
3.9 mm
plastic shrink small outline package; 14 leads; body
width 5.3 mm
SOT108-1
SOT337-1
40 C
to +125
C
Name
DIP14
Description
plastic dual in-line package; 14 leads (300 mil)
Version
SOT27-1
Type number
plastic thin shrink small outline package; 14 leads; body SOT402-1
width 4.4 mm
NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
4. Functional diagram
2
1
5
4
9
10
12
13
1A
1OE
2A
2OE
1Y
3
2
1
3
2Y
6
1
5
EN1
6
4
3A
3OE
4A
4OE
mna228
3Y
8
9
8
10
4Y
11
12
11
13
nA
nY
nOE
mna229
mna227
Fig 1.
Logic symbol
Fig 2.
IEC logic symbol
Fig 3.
Logic diagram (one buffer)
5. Pinning information
5.1 Pinning
74HC125
74HCT125
1OE
1A
1Y
2OE
2A
2Y
GND
1
2
3
4
5
6
7
aaa-003129
14
VCC
13 4OE
12 4A
11 4Y
10 3OE
9 3A
8 3Y
Fig 4.
Pin configuration DIP14, SO14 and (T)SSOP14
74HC_HCT125
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 January 2013
2 of 17
NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
5.2 Pin description
Table 2.
Symbol
1OE, 2OE, 3OE, 4OE
1A, 2A, 3A, 4A
1Y, 2Y, 3Y, 4Y
GND
V
CC
Pin description
Pin
1, 4, 10, 13
2, 5, 9, 12
3, 6, 8, 11
7
14
Description
output enable input (active LOW)
data input
data output
ground (0 V)
supply voltage
6. Functional description
Table 3.
Control
nOE
L
H
[1]
Function table
[1]
Input
nA
L
H
X
Output
nY
L
H
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
DIP14 package
SO14 and (T)SSOP14
packages
[1]
[2]
[2]
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
V
O
=
0.5
V to (V
CC
+ 0.5 V)
[1]
[1]
Min
0.5
-
-
-
-
-
65
-
-
Max
+7
20
20
35
+70
70
+150
750
500
Unit
V
mA
mA
mA
mA
mA
C
mW
mW
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For DIP14 package: P
tot
derates linearly with 12 mW/K above 70
C.
For SO14 package: P
tot
derates linearly with 8 mW/K above 70
C.
For (T)SSOP14 packages: P
tot
derates linearly with 5.5 mW/K above 60
C.
74HC_HCT125
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 January 2013
3 of 17
NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
V
CC
V
I
V
O
T
amb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Conditions
74HC125
Min
2.0
0
0
40
-
-
-
Typ
5.0
-
-
+25
-
1.67
-
Max
6.0
V
CC
V
CC
+125
625
139
83
74HCT125
Min
4.5
0
0
40
-
-
-
Typ
5.0
-
-
+25
-
1.67
-
Max
5.5
V
CC
V
CC
+125
-
139
-
V
V
V
C
ns/V
ns/V
ns/V
Unit
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74HC125
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
output voltage
V
I
= V
IH
or V
IL
I
O
=
20 A;
V
CC
= 2.0 V
I
O
=
20 A;
V
CC
= 4.5 V
I
O
=
20 A;
V
CC
= 6.0 V
I
O
=
6.0
mA; V
CC
= 4.5 V
I
O
=
7.8
mA; V
CC
= 6.0 V
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
I
O
= 20
A;
V
CC
= 2.0 V
I
O
= 20
A;
V
CC
= 4.5 V
I
O
= 20
A;
V
CC
= 6.0 V
I
O
= 6.0 mA; V
CC
= 4.5 V
I
O
= 7.8 mA; V
CC
= 6.0 V
I
I
I
OZ
input leakage
current
OFF-state
output current
V
I
= V
CC
or GND;
V
CC
= 6.0 V
V
I
= V
IH
or V
IL
;
V
O
= V
CC
or GND;
V
CC
= 6.0 V
-
-
-
-
-
-
-
0
0
0
0.15
0.16
-
-
0.1
0.1
0.1
0.26
0.26
0.1
0.5
-
-
-
-
-
-
-
0.1
0.1
0.1
0.33
0.33
1.0
5.0
-
-
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
1.0
10.0
V
V
V
V
V
A
A
1.9
4.4
5.9
3.98
5.48
2.0
4.5
6.0
4.32
5.81
-
-
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
1.5
3.15
4.2
-
-
-
1.2
2.4
3.2
0.8
2.1
2.8
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
V
V
V
V
V
V
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
74HC_HCT125
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 January 2013
4 of 17
NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
Table 6.
Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
I
CC
C
I
supply current
input
capacitance
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output voltage
V
CC
= 4.5 V to 5.5 V
V
CC
= 4.5 V to 5.5 V
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
I
O
=
20 A
I
O
=
6
mA
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
I
O
= 20
A
I
O
= 6.0 mA
I
I
I
OZ
I
CC
I
CC
input leakage
current
OFF-state
output current
supply current
additional
supply current
V
I
= V
CC
or GND;
V
CC
= 5.5 V
V
I
= V
IH
or V
IL
; V
CC
= 5.5 V;
V
O
= V
CC
or GND
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 5.5 V
per input pin;
V
I
= V
CC
2.1 V; I
O
= 0 A;
other inputs at V
CC
or GND;
V
CC
= 4.5 V to 5.5 V
-
-
-
-
-
-
0
0.16
-
-
-
100
0.1
0.26
0.1
0.5
8.0
360
-
-
-
-
-
-
0.1
0.33
1.0
5.0
80
450
-
-
-
-
-
-
0.1
0.4
1.0
10
160
490
V
V
A
A
A
A
4.4
3.98
4.5
4.32
-
-
4.4
3.84
-
-
4.4
3.7
-
-
V
V
Conditions
Min
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 6.0 V
-
-
25
C
Typ
-
3.5
Max
8.0
-
40 C
to +85
C 40 C
to +125
C
Unit
Min
-
Max
80
Min
-
Max
160
A
pF
74HCT125
V
IH
V
IL
V
OH
2.0
-
1.6
1.2
-
0.8
2.0
-
-
0.8
2.0
-
-
0.8
V
V
C
I
input
capacitance
-
3.5
-
pF
74HC_HCT125
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 January 2013
5 of 17
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