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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Nexperia USA Inc. 74HCT126D-Q100J

Name: 74HCT126D-Q100J
Brand: Nexperia USA Inc.
SKU: 74HCT126D-Q100J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT126D-Q100J

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: 74HCT126D-Q100J.pdf

Description:: IC BUFFER NON-INVERT 5.5V 14SO

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Product details

Overview

74HCT126D-Q100 from Nexperia is an automotive-qualified quad 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V supply, delivering ±6 mA output drive at V_CC = 4.5 V, and supporting -40 °C to +125 °C ambient temperature - used in CAN/LIN bus interface signal conditioning and ECU I/O expansion circuits.

For engineers reviewing the 74HCT126D-Q100 datasheet, 74HCT126D-Q100 pinout, 74HCT126D-Q100 application, or 74HCT126D-Q100 equivalent, key selection criteria include TTL-level input compatibility, 3-state enable timing (t_en ≤ 38 ns @ V_CC = 4.5 V), high-temperature operation up to +125 °C, and AEC-Q100 Grade 1 qualification for under-hood automotive use.

Technical Context

This device implements four independent non-inverting buffers, each with a dedicated active-HIGH output enable (nOE) controlling high-impedance OFF-state. Input clamp diodes allow safe interfacing to voltages exceeding V_CC when used with current-limiting resistors.

It adheres to JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards, supports CMOS-level outputs, and features HBM ESD protection >2000 V and CDM >1000 V - enabling robust operation in noisy automotive environments without external protection circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with 5 V automotive power rails and stable operation across battery voltage transients.
Input Logic Type	TTL-compatible - accepts standard 5 V logic thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), eliminating level-shifting in legacy microcontroller interfaces.
Output Drive	±6.0 mA @ V_CC = 4.5 V - sufficient to drive 50 pF loads with <36 ns propagation delay, supporting medium-speed bus buffering.
Enable Timing	t_en / t_dis ≤ 38 ns / 42 ns @ V_CC = 4.5 V - enables fast bus arbitration and dynamic line sharing in multiplexed I/O systems.
Operating Temperature	-40 °C to +125 °C - qualified per AEC-Q100 Grade 1, suitable for engine control units, body controllers, and ADAS sensor hubs.
ESD Protection	HBM >2000 V, CDM >1000 V - meets automotive system-level ESD immunity requirements without added protection components.

Pinout & Package

74HCT126D-Q100 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	nOE₁–nOE₄	Active-HIGH output enable inputs - each controls one buffer's 3-state output independently; tied HIGH for always-enabled operation.
2, 5, 9, 12	nA₁–nA₄	Data inputs - TTL-compatible, with internal clamp diodes enabling safe overvoltage tolerance when series resistors are used.
3, 6, 8, 11	nY₁–nY₄	Non-inverting buffered outputs - present high-impedance (Z) state when corresponding nOE is LOW, enabling bus contention avoidance.
7	GND	Ground reference - must be low-inductance connection to minimize switching noise coupling into logic outputs.
14	V_CC	Positive supply - requires local 100 nF ceramic decoupling capacitor placed within 5 mm of the pin for stable high-speed operation.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive use from -40 °C to +125 °C, including HTOL, TC, and ESD stress testing per AEC specification.
TTL-compatible input thresholds	V_IH ≥ 2.0 V and V_IL ≤ 0.8 V @ V_CC = 4.5–5.5 V - ensures interoperability with legacy 5 V microcontrollers and peripheral ICs.
Individual 3-state control per channel	Four independent nOE pins allow selective bus isolation - critical for shared data lines in multi-ECU networks like LIN or diagnostic buses.
Input clamp diodes	Enable safe interface to signals up to V_CC + 0.5 V using external current-limiting resistors - reduces need for discrete protection components.
Low quiescent supply current	I_CC ≤ 160 μA @ V_CC = 5.5 V and T_A = +125 °C - minimizes standby power in always-on vehicle modules.

Applications

Engine Control Unit (ECU) I/O Expansion

LIN Bus Transceiver Interface

Use Scenario: Expanding GPIO count on a 32-bit MCU to manage solenoid drivers, sensor inputs, and status LEDs in compact engine bay modules.

IC Role / Device Role / Timing Role: Quad buffer isolates MCU pins from noisy actuator loads while enabling bidirectional signal routing via 3-state control during diagnostics.

Use Value: Eliminates need for discrete level shifters or MOSFET switches; individual nOE control allows time-multiplexed access to shared LED/solenoid driver lines.

Use Scenario: Conditioning digital signals between a LIN master controller and multiple slave nodes in body electronics (e.g., door modules).

IC Role / Device Role / Timing Role: Buffers LIN TX/RX lines and enables/disables transceiver paths during sleep/wake transitions using nOE-driven 3-state gating.

Use Value: Ensures clean signal edge integrity at 19.2 kbps LIN rates while preventing bus contention during node reset sequences.

Automotive Instrument Cluster Display Driver

ADAS Camera Sensor Data Mux

Use Scenario: Driving segmented LCD backlight controls and button scan lines in a dashboard cluster operating near HVAC ducts.

IC Role / Device Role / Timing Role: Provides ESD-hardened, temperature-stable buffering for microcontroller outputs feeding display driver ICs and capacitive touch sense lines.

Use Value: Maintains signal fidelity at +105 °C ambient; HBM >2000 V rating prevents latch-up during assembly handling and field ESD events.

Use Scenario: Multiplexing parallel camera sensor outputs (e.g., two 8-bit image streams) onto a single MIPI CSI-2 bridge IC in surround-view systems.

IC Role / Device Role / Timing Role: Acts as a synchronous gate for pixel clock-aligned data lanes, with nOE synchronized to frame sync signals for seamless source switching.

Use Value: Propagation delay ≤36 ns and transition time ≤18 ns ensure setup/hold timing margins are preserved across 25 MHz pixel clocks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74HCT125D-Q100	Active-LOW output enable (nOE) instead of active-HIGH; identical pinout and electrical specs otherwise.	Requires inverted enable logic from host MCU - unsuitable where firmware cannot modify OE polarity without hardware redesign.	Select when existing PCB layout uses active-LOW enable signaling or when synchronizing with other HCT125-based subsystems.
SN74HCT126QPWRQ1	TI's AEC-Q100 Grade 1 variant; same function but different package (TSSOP-14, SOT402-1) and slightly higher max t_pd (40 ns vs. 36 ns @ V_CC = 4.5 V).	Thermal resistance differs (R_θJA ≈ 137 K/W vs. 110 K/W for SO14); less suitable for high-power-density layouts without thermal relief.	Prefer for designs already using TI's ecosystem or requiring TSSOP footprint compatibility; verify thermal margin at +125 °C.

Compared with 74HCT126D-Q100, the 74HCT125D-Q100 shifts enable polarity but retains identical drive strength and temperature range, while SN74HCT126QPWRQ1 offers alternate packaging with trade-offs in thermal performance and timing consistency - both require validation of enable logic mapping and board-level thermal design.

Availability

74HCT126D-Q100 is available at Aetrix Electronics and suitable for automotive engine control units, LIN bus interface modules, and instrument cluster display subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT126D-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert specializing in high-performance, high-reliability logic, analog, and discrete components - founded in 2017 as a spin-off from NXP, now serving automotive, industrial, and consumer markets.

This device belongs to Nexperia's Automotive Logic portfolio, designed specifically for AEC-Q100-compliant signal conditioning, bus interfacing, and I/O expansion in harsh-environment electronic control units.

FAQ

Is 74HCT126D-Q100 pin-compatible with standard 74HCT126 devices?

Yes - it shares identical SO14 (SOT108-1) pinout, electrical characteristics, and functional behavior with non-automotive 74HCT126 variants. The "-Q100" suffix denotes AEC-Q100 qualification and extended temperature screening, not physical or logical changes.

Can 74HCT126D-Q100 operate at 3.3 V supply?

No - its recommended V_CC range is strictly 4.5 V to 5.5 V. At 3.3 V, input thresholds fall outside TTL specification (V_IH min = 2.0 V becomes marginal), and output drive degrades below usable levels; use 74LVC126 or 74ALVC126 for 3.3 V systems.

What is the maximum capacitive load this device can drive reliably?

It is characterized for CL = 50 pF in dynamic tests, with t_pd ≤ 36 ns and t_t ≤ 18 ns at V_CC = 4.5 V. Driving >75 pF may exceed transition time limits and increase ground bounce; add series termination or reduce trace length for heavier loads.

Does this part support hot-swap or live-insertion?

No - it lacks powered-off protection or I_OFF isolation. Applying signals to inputs or outputs while V_CC is unpowered risks forward-biasing internal clamp diodes and causing excessive current flow; always power V_CC before asserting signals.

74HCT126D-Q100J Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 1

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 6mA, 6mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74HCT126D-Q100J FAQ

1.How can I place an order for 74HCT126D-Q100J through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT126D-Q100J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74HCT126D-Q100J reliable?

The price and inventory of 74HCT126D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT126D-Q100J is usually 5 days.

3.What payment methods are accepted for 74HCT126D-Q100J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT126D-Q100J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT126D-Q100J?

74HCT126D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT126D-Q100J order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74HCT126D-Q100J?

For technical support, including 74HCT126D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT126D-Q100J requirements.

6.How does Aetrix verify that 74HCT126D-Q100J is sourced from the original manufacturer or authorized distributors?

All 74HCT126D-Q100J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HCT126D-Q100J meets industry standards.

7.What is the process for return or replacement of 74HCT126D-Q100J?

All 74HCT126D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT126D-Q100J, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74HCT126D-Q100J part is unused and in its original packaging.

Return procedure for 74HCT126D-Q100J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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