74HC126; 74HCT126
Quad buffer/line driver; 3-state
Rev. 4 — 1 December 2015
Product data sheet
1. General description
The 74HC126; 74HCT126 is a quad buffer/line driver with 3-state outputs controlled by
the output enable inputs (nOE). A LOW 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 VCC.
2. Features and benefits
Inverting outputs
Complies with JEDEC standard no. 7A
Input levels:
For 74HC126: CMOS level
For 74HCT126: TTL level
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 40 C to +125 C
3. Ordering information
Table 1.
Ordering information
Type number
Package
Temperature range
74HC126D
Name
Description
Version
40 C to +125 C
SO14
plastic small outline package; 14 leads;
body width 3.9 mm
SOT108-1
40 C to +125 C
SSOP14
plastic shrink small outline package; 14 leads;
body width 5.3 mm
SOT337-1
40 C to +125 C
TSSOP14
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
SOT402-1
74HCT126D
74HC126DB
74HCT126DB
74HC126PW
74HCT126PW
74HC126; 74HCT126
NXP Semiconductors
Quad buffer/line driver; 3-state
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
1OE, 2OE, 3OE, 4OE
1, 4, 10, 13
data enable input (active HIGH)
1A, 2A, 3A, 4A
2, 5, 9, 12
data input
1Y, 2Y, 3Y, 4Y
3, 6, 8, 11
data output
GND
7
ground (0 V)
VCC
14
supply voltage
6. Functional description
Table 3.
Function table[1]
Control
Input
Output
nOE
nA
nY
H
L
L
H
H
H
L
X
Z
[1]
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
Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
0.5
+7
V
IIK
input clamping current
VI < 0.5 V or VI > VCC + 0.5 V
[1]
-
20
mA
IOK
output clamping current
VO < 0.5 V or VO > VCC + 0.5 V
[1]
-
20
mA
IO
output current
0.5 V < VO < VCC + 0.5 V
-
35
mA
ICC
supply current
-
70
mA
IGND
ground current
70
-
mA
Tstg
storage temperature
65
+150
C
Ptot
total power dissipation
-
500
mW
Tamb = 40 C to +125 C
SO14 and (T)SSOP14 packages
[2]
[1]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2]
For SO14 package: Ptot derates linearly with 8 mW/K above 70 C.
For (T)SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
74HC_HCT126
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 1 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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