Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

74HC126; 74HCT126

Quad buffer/line driver; 3-state

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.

Features and benefits

  • Wide supply voltage range from 2.0 V to 6.0 V

  • CMOS low power dissipation

  • High noise immunity

  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

  • Complies with JEDEC standards:

    • JESD8C (2.7 V to 3.6 V)

    • JESD7A (2.0 V to 6.0 V)

  • Input levels:

    • For 74HC126: CMOS levels

    • For 74HCT126: TTL levels

  • ESD protection:

    • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type number VCC (V) Logic switching levels Output drive capability (mA) fmax (MHz) Nr of bits Power dissipation considerations Tamb (°C) Rth(j-a) (K/W) Ψth(j-top) (K/W) Rth(j-c) (K/W) Package name
74HC126D 2.0 - 6.0 CMOS ± 7.8 36 4 low -40~125 88 7.3 45 SO14
74HC126PW 2.0 - 6.0 CMOS ± 7.8 36 4 low -40~125 127 2.4 51.5 TSSOP14
74HCT126D 4.5 - 5.5 TTL ± 6 36 4 low -40~125 88 7.3 45 SO14
74HCT126PW 4.5 - 5.5 TTL ± 6 36 4 low -40~125 127 2.4 51.5 TSSOP14

Package

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
74HC126D 74HC126D,653
(933757030653)		 Active 74HC126D SOT108-1
SO14
(SOT108-1) 		SOT108-1 SO-SOJ-REFLOW
SO-SOJ-WAVE
WAVE_BG-BD-1
Not available
74HC126PW 74HC126PW,118
(935183560118)		 Active HC126 SOT402-1
TSSOP14
(SOT402-1) 		SOT402-1 SSOP-TSSOP-VSO-WAVE
SOT402-1_118
74HCT126D 74HCT126D,653
(933757050653)		 Active 74HCT126D SOT108-1
SO14
(SOT108-1) 		SOT108-1 SO-SOJ-REFLOW
SO-SOJ-WAVE
WAVE_BG-BD-1
Not available
74HCT126PW 74HCT126PW,118
(935183550118)		 Active HCT126 SOT402-1
TSSOP14
(SOT402-1) 		SOT402-1 SSOP-TSSOP-VSO-WAVE
SOT402-1_118

All type numbers in the table below are discontinued.

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
74HC126D 74HC126D,652
(933757030652)		 Withdrawn / End-of-life 74HC126D SOT108-1
SO14
(SOT108-1) 		SOT108-1 SO-SOJ-REFLOW
SO-SOJ-WAVE
WAVE_BG-BD-1
SOT108-1_652
74HC126DB 74HC126DB,112
(935171430112)		 Obsolete no package information
74HC126DB,118
(935171430118)		 Obsolete
74HC126PW 74HC126PW,112
(935183560112)		 Withdrawn / End-of-life HC126 SOT402-1
TSSOP14
(SOT402-1) 		SOT402-1 SSOP-TSSOP-VSO-WAVE
Not available
74HCT126DB 74HCT126DB,112
(935183590112)		 Obsolete no package information
74HCT126DB,118
(935183590118)		 Obsolete

Environmental information

Type number Orderable part number Chemical content RoHS RHF-indicator
74HC126D 74HC126D,653 74HC126D rohs rhf rhf
74HC126PW 74HC126PW,118 74HC126PW rohs rhf rhf
74HCT126D 74HCT126D,653 74HCT126D rohs rhf rhf
74HCT126PW 74HCT126PW,118 74HCT126PW rohs rhf rhf

All type numbers in the table below are discontinued.

Type number Orderable part number Chemical content RoHS RHF-indicator
74HC126D 74HC126D,652 74HC126D rohs rhf rhf
74HC126DB 74HC126DB,112 74HC126DB rohs rhf rhf
74HC126DB 74HC126DB,118 74HC126DB rohs rhf rhf
74HC126PW 74HC126PW,112 74HC126PW rohs rhf rhf
74HCT126DB 74HCT126DB,112 74HCT126DB rohs rhf rhf
74HCT126DB 74HCT126DB,118 74HCT126DB rohs rhf rhf
Quality and reliability disclaimer

Documentation (16)

File name Title Type Date
74HC_HCT126 Quad buffer/line driver; 3-state Data sheet 2025-07-30
AN11044 Pin FMEA 74HC/74HCT family Application note 2019-01-09
AN90063 Questions about package outline drawings Application note 2025-10-22
SOT108-1 3D model for products with SOT108-1 package Design support 2020-01-22
SOT402-1 3D model for products with SOT402-1 package Design support 2023-02-02
hct126 74HCT126 IBIS model IBIS model 2015-05-19
Nexperia_package_poster Nexperia package poster Leaflet 2020-05-15
SO14_SOT108-1_mk plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm body Marcom graphics 2017-01-28
TSSOP14_SOT402-1_mk plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm body Marcom graphics 2017-01-28
SOT108-1 plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm body Package information 2023-11-07
SOT402-1 plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.2 mm body Package information 2023-11-07
SO-SOJ-REFLOW Footprint for reflow soldering Reflow soldering 2009-10-08
HCT_USER_GUIDE HC/T User Guide User manual 1997-10-31
SO-SOJ-WAVE Footprint for wave soldering Wave soldering 2009-10-08
WAVE_BG-BD-1 Wave soldering profile Wave soldering 2021-09-08
SSOP-TSSOP-VSO-WAVE Footprint for wave soldering Wave soldering 2009-10-08

Support

If you are in need of design/technical support, let us know and fill in the answer form we'll get back to you shortly.

Models

File name Title Type Date
SOT108-1 3D model for products with SOT108-1 package Design support 2020-01-22
SOT402-1 3D model for products with SOT402-1 package Design support 2023-02-02
hct126 74HCT126 IBIS model IBIS model 2015-05-19

Ordering, pricing & availability

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