DATA SH EET
Product specification
File under Integrated Circuits, IC06 December 1990
INTEGRATED CIRCUITS
74HC/HCT126
Quad buffer/line driver; 3-state
For a complete data sheet, please also download:
•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
December 1990 2
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT126
FEATURES
•Output capability: bus driver
•ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT126 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL).
They are specified in compliance with JEDEC standard no. 7A.
The HC/HCT126 are four non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs (nY) are controlled by
the output enable input (nOE). A LOW at nOE causes the outputs to assume a HIGH impedance OFF-state.
The “126” is identical to the “125” but has active HIGH enable inputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr= tf= 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PDin µW):
PD= CPD ×VCC2×fi+∑(CL×VCC2×fo) where:
fi= input frequency in MHz
fo= output frequency in MHz
CL= output load capacitance in pF
VCC = supply voltage in V
∑(CL×VCC2×fo) = sum of outputs
2. For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC −1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL PARAMETER CONDITIONS TYPICAL UNIT
HC HCT
tPHL/ tPLH propagation delay nA to nY CL= 15 pF; VCC = 5 V 9 11 ns
CIinput capacitance 3.5 3.5 pF
CPD power dissipation capacitance per buffer notes 1 and 2 23 24 pF
December 1990 3
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT126
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 4, 10, 13 1OE to 4OE output enable inputs (active HIGH)
2, 5, 9, 12 1A to 4A data inputs
3, 6, 8, 11 1Y to 4Y data outputs
7 GND ground (0 V)
14 VCC positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.
(a) (b)
Fig.4 Functional diagram. Fig.5 Logic diagram (one buffer).
FUNCTION TABLE
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS OUTPUT
nOE nA nY
H
H
L
L
H
X
L
H
Z
December 1990 4
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT126
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr= tf= 6 ns; CL= 50 pF
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HC VCC
(V) WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
nA to nY 30 100 125 150 ns 2.0 Fig.6
11 20 25 30 4.5
9172126 6.0
t
PZH/ tPZL 3-state output
enable time
nOE to nY
41 125 155 190 ns 2.0 Fig.7
15 25 31 38 4.5
12 21 26 32 6.0
tPHZ/ tPLZ 3-state output
disable time
nOE to nY
41 125 155 190 ns 2.0 Fig.7
15 25 31 38 4.5
12 21 26 32 6.0
tTHL/ tTLH output transition
time 14 60 75 90 ns 2.0 Fig.6
5121518 4.5
4101315 6.0
December 1990 5
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT126
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per unit, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr= tf= 6 ns; CL= 50 pF
INPUT UNIT LOAD COEFFICIENT
nA, nOE 1.00
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT VCC
(V) WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
nA to nY 14 24 30 36 ns 4.5 Fig.6
tPZH/ tPZL 3-state output
enable time
nOE to nY
13 25 31 38 ns 4.5 Fig.7
tPHZ/ tPLZ 3-state output
disable time
nOE to nY
18 28 35 42 ns 4.5 Fig.7
tTHL/ tTLH output transition
time 5 12 15 18 ns 4.5 Fig.6
December 1990 6
Philips Semiconductors Product specification
Quad buffer/line driver; 3-state 74HC/HCT126
AC WAVEFORMS
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
Fig.6 Waveforms showing the input (nA) to output (nY) propagation delays and the output transition times.
(1) HC : VM= 50%; VI= GND to VCC.
HCT: VM= 1.3 V; VI= GND to 3 V.
Fig.7 Waveforms showing the 3-state enable and disable times.
(1) HC : VM= 50%; VI= GND to VCC.
HCT: VM= 1.3 V; VI= GND to 3 V.
Philips Semiconductors - PIP - 74HC/HCT126; Quad buffer/line driver; 3-state
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Product Information
74HC/HCT126;
Quad buffer/line
driver; 3-state
Information as of 2003-04-22
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General description
The 74HC/HCT126 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL
(LSTTL).
They are specified in compliance with JEDEC standard no. 7A.
The HC/HCT126 are four non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs (nY) are
controlled by the output enable input (nOE). A LOW at nOE causes the outputs to assume a HIGH impedance OFF-
state.
The '126' is identical to the '125' but has active HIGH enable inputs.
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Features
● Output capability: bus driver
● ICC category: MSI
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Datasheet
Type number Title Publication
release date Datasheet status Page
count File
size
(kB)
Datasheet
74HC/HCT126 Quad buffer/line
driver; 3-state 12/1/1990 Product specification 6 40
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PDF
File
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Additional datasheet info
To complete the device datasheet with package and family information, also download the following PDF files. The
"Logic Package Information" document is required to determine in which package(s) this device is available.
Document Description
1
Download
PDF
File
HCT_FAMILY_SPECIFICATIONS HC/T Family Specifications, The IC06 74HC/HCT/HCMOS Logic
Family Specifications
2
Download
PDF
HCT_PACKAGE_INFO HC/T Package Info, The IC06 74HC/HCT/HCMOS Logic Package
Information
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Philips Semiconductors - PIP - 74HC/HCT126; Quad buffer/line driver; 3-state
File
3
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PDF
File
HCT_PACKAGE_OUTLINES HC/T Package Outlines, The IC06 74HC/HCT/HCMOS Logic
Package Outlines
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Parametrics
Type number Package Description Propagation
Delay(ns) Voltage No.
of
Pins
Power
Dissipation
Considerations
Logic
Switching
Levels
Output
Drive
Capability
74HC126D SOT108-1
(SO14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications CMOS Low
74HC126DB SOT337-1
(SSOP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications CMOS Low
74HC126N SOT27-1
(DIP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications CMOS Low
74HC126PW SOT402-1
(TSSOP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications CMOS Low
74HCT126D SOT108-1
(SO14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable; TTL
Enabled (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications TTL Low
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Philips Semiconductors - PIP - 74HC/HCT126; Quad buffer/line driver; 3-state
74HCT126DB SOT337-1
(SSOP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable; TTL
Enabled (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications TTL Low
74HCT126N SOT27-1
(DIP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable; TTL
Enabled (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications TTL Low
74HCT126PW SOT402-1
(TSSOP14)
Quad
Buffer/Line
Driver with
Active
HIGH
Output
Enable; TTL
Enabled (3-
State)
15 5 Volts
+14 Low Power or
Battery
Applications TTL Low
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Products, packages, availability and ordering
Type number North
American type
number
Ordering code
(12NC) Marking/Packing
Download
PDF
File
Discretes
packing info
Package Device status Buy online
74HC126D 74HC126D 9337 570 30652 Standard Marking
* Bulk Pack,
CECC
SOT108-1
(SO14) Full production
-
74HC126D-T 9337 570 30653 Standard Marking
* Reel Pack,
SMD, 13", CECC
SOT108-1
(SO14) Full production
-
74HC126DB 74HC126DB 9351 714 30112 Standard Marking
* Bulk Pack SOT337-1
(SSOP14) Full production
-
74HC126DB-
T 9351 714 30118 Standard Marking
* Reel Pack,
SMD, 13"
SOT337-1
(SSOP14) Full production
-
74HC126N 74HC126N 9337 570 20652 Standard Marking
* Bulk Pack,
CECC
SOT27-1
(DIP14) Full production
-
74HC126PW 74HC126PW 9351 835 60112 Standard Marking
* Bulk Pack
SOT402-1
(TSSOP14)
Full production
-
74HC126PW-
T 9351 835 60118 Standard Marking
* Reel Pack,
SMD, 13"
SOT402-1
(TSSOP14)
Full production
-
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Philips Semiconductors - PIP - 74HC/HCT126; Quad buffer/line driver; 3-state
74HCT126D 74HCT126D 9337 570 50652 Standard Marking
* Bulk Pack,
CECC
SOT108-1
(SO14) Full production
-
74HCT126D-
T 9337 570 50653 Standard Marking
* Reel Pack,
SMD, 13", CECC
SOT108-1
(SO14) Full production
-
74HCT126DB 74HCT126DB 9351 835 90112 Standard Marking
* Bulk Pack SOT337-1
(SSOP14) Full production
-
74HCT126DB-
T 9351 835 90118 Standard Marking
* Reel Pack,
SMD, 13"
SOT337-1
(SSOP14) Full production
-
74HCT126N 74HCT126N 9337 570 40652 Standard Marking
* Bulk Pack,
CECC
SOT27-1
(DIP14) Full production
-
74HCT126PW 74HCT126PW 9351 835 50112 Standard Marking
* Bulk Pack
SOT402-1
(TSSOP14)
Full production
-
74HCT126PW-
T 9351 835 50118 Standard Marking
* Reel Pack,
SMD, 13"
SOT402-1
(TSSOP14)
Full production
-
Products in the above table are all in production. Some variants are discontinued; click here for information on these
variants.
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similar
to
74HC/HCT126
74HC/HCT126 links to the similar products page containing an overview of products that are similar in
function or related to the type number(s) as listed on this page. The similar products page includes products from the
same catalog tree(s), relevant selection guides and products from the same functional category.
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Support & tools
Download
PDF
File
HC/T Family Specifications, The IC06 74HC/HCT/HCMOS Logic Family Specifications(date 01-Mar-98)
Download
PDF
File
HC/T User Guide(date 01-Nov-97)
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