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

Diodes Incorporated 74AHCT1G126QSE-7

Name: 74AHCT1G126QSE-7
Brand: Diodes Incorporated
SKU: 74AHCT1G126QSE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT1G126QSE-7

Manufacturer:: Diodes Incorporated

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: 74AHCT1G126QSE-7.pdf

Description:: IC BUFFER NON-INVERT 5.5V SOT353

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Product details

Overview

74AHCT1G126QSE-7 from Diodes Incorporated is an AEC-Q100 Grade 1 qualified single non-inverting buffer with 3-state output, designed for automotive and industrial logic interfacing. It operates from 4.5V to 5.5V, delivers ±8mA drive at 5.0V, features Schmitt-trigger inputs for noise immunity, and supports -40°C to +125°C ambient operation.

For engineers reviewing the 74AHCT1G126QSE-7 datasheet, 74AHCT1G126QSE-7 pinout, 74AHCT1G126QSE-7 application, or 74AHCT1G126QSE-7 equivalent, key selection criteria include 3-state bus driving capability, automotive-grade thermal robustness, input tolerance beyond V_CC, balanced propagation delays (≤7.0 ns @ CL=15pF), and low ICC (≤40 µA) in static operation.

Technical Context

This device implements a single-channel CMOS buffer with active-HIGH output enable control, enabling bidirectional bus isolation in high-reliability systems. Its Schmitt-trigger inputs accept slow-rising signals without oscillation, while the 3-state output supports shared-bus architectures with minimal contention risk.

The logic function follows standard truth table behavior: when OE = HIGH, Y = A; when OE = LOW, Y = high-impedance (Z). Propagation delay (t_PD) and enable/disable timing (t_EN/t_DIS) are tightly balanced across temperature and voltage, ensuring deterministic timing in synchronous control paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5V to 5.5V - ensures compatibility with standard 5V automotive and industrial rails
Output Drive	±8mA at 5.0V - sufficient to drive multiple TTL loads or trace capacitance up to 50pF
Propagation Delay	≤7.0 ns @ CL=15pF - enables reliable operation in sub-100MHz digital control loops
Operating Temp	-40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood automotive use
Input Thresholds	V_IL ≤ 0.8V, V_IH ≥ 2.0V @ V_CC=5V - provides 1.2V noise margin against ground bounce or supply ripple
IOZ Leakage	≤10 µA @ -40°C to +125°C - guarantees low standby current in powered-down bus segments
ESD Robustness	2 kV HBM, 1 kV CDM - exceeds AEC-Q100-002/-011 for assembly-line handling safety

Pinout & Package

SOT353 (5-pin SC-70) package: ultra-compact 2.15mm × 2.1mm footprint with 0.65mm lead pitch, optimized for space-constrained automotive ECUs and sensor modules.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Output Enable Input	Active-HIGH control: drives Y into high-Z when LOW; enables bus arbitration
2 (A)	Data Input	Non-inverting logic input with Schmitt-trigger hysteresis for noise rejection
3 (GND)	Ground Reference	Return path for all internal logic and output current; must be low-impedance
4 (Y)	3-State Output	Buffered A signal when OE=HIGH; high-impedance when OE=LOW
5 (V_CC)	Power Supply	Positive rail connection; decoupling capacitor required within 5mm

Key Features

Feature	Design Value
Grade 1 Automotive Qualification	AEC-Q100 qualified, PPAP-capable, manufactured in IATF 16949 facilities - enables direct use in safety-critical ECU designs
Schmitt-Trigger Inputs	Hysteresis >0.5V typical - eliminates false triggering from noisy CAN/LIN bus stubs or relay contact bounce
V_I Range Beyond V_CC	Inputs tolerate -0.5V to 6.5V - allows safe interfacing with mixed-voltage subsystems (e.g., 3.3V MCU to 5V sensor)
Low Static Power	I_CC ≤ 40 µA max @ -40°C to +125°C - reduces system-level quiescent current in always-on modules
Lead-Free & Green	Fully RoHS 3 compliant, halogen/antimony-free (<900ppm Br/Cl, <1000ppm Sb) - satisfies global automotive environmental mandates

Applications

Automotive Body Control Module

Industrial PLC Digital I/O

Use Scenario: Isolating microcontroller GPIO from high-noise solenoid driver circuits in door lock or lighting control units.

IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state output enables time-multiplexed sharing of a single data bus among multiple actuators.

Use Value: Schmitt-trigger inputs reject EMI from PWM-driven loads; ±8mA drive directly interfaces with optocoupler inputs without external amplification.

Use Scenario: Level-shifting and bus buffering between 3.3V FPGA configuration logic and 5V field I/O expansion cards.

IC Role / Device Role / Timing Role: Bidirectional bus driver supporting hot-swap insertion of I/O modules via controlled 3-state enable sequencing.

Use Value: Input voltage range (-0.5V to 6.5V) prevents latch-up during power sequencing mismatches; t_EN/t_DIS ≤6.5ns ensures glitch-free state transitions.

Automotive Infotainment Display Interface

Medical Diagnostic Equipment Logic Isolation

Use Scenario: Driving parallel LCD segment lines from a low-power ARM Cortex-M core operating at 5V logic levels.

IC Role / Device Role / Timing Role: Single-gate buffer providing clean, slew-controlled output edges to minimize radiated emissions near sensitive RF receivers.

Use Value: Balanced t_PLH/t_PHL and low CPD (11pF) reduce timing skew and dynamic power consumption in high-density display drivers.

Use Scenario: Isolating patient-connected analog front-end circuitry from digital processing subsystems in portable ultrasound devices.

IC Role / Device Role / Timing Role: Safety-critical logic gate enforcing strict separation between isolated and non-isolated domains via hardware-enforced 3-state disable.

Use Value: AEC-Q100 qualification and 100mA latch-up immunity ensure reliability under transient overvoltage events common in hospital-grade power environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G126DBVR	Wider V_CC range (1.65–5.5V); lower drive (±24mA @ 3.3V); no AEC-Q100 qualification	Targeted at consumer/portable systems; lacks automotive temp range and qualification documentation	Select only for cost-sensitive non-automotive designs requiring 3.3V operation
74AHC1G126SE-7	Same SOT353 package; identical pinout; but AHC family (2–5.5V), not AHCT - higher V_IH threshold (≥3.5V @ V_CC=5V)	Not suitable for legacy 5V TTL-compatible systems requiring 2.0V V_IH	Use only if interfacing exclusively with CMOS logic; verify input compatibility before substitution

Compared with SN74LVC1G126DBVR and 74AHC1G126SE-7, the 74AHCT1G126QSE-7 uniquely combines AEC-Q100 Grade 1 qualification, TTL-compatible input thresholds, and guaranteed 5V operation - making it the sole choice for automotive body electronics where interoperability with legacy 5V sensors and robustness across extreme temperatures are mandatory.

Availability

74AHCT1G126QSE-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, infotainment display interfaces, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT1G126QSE-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability components for automotive, industrial, and computing markets.

The 74AHCT logic family targets automotive and industrial applications demanding robust 5V TTL-compatible interfacing with AEC-Q100 qualification, emphasizing noise immunity, wide temperature operation, and supply voltage stability.

FAQ

What is the maximum allowable input voltage for the 74AHCT1G126QSE-7?

The absolute maximum input voltage is -0.5V to 6.5V per the datasheet's Absolute Maximum Ratings table. This allows safe interfacing with signals exceeding V_CC (e.g., 5.5V test points or mixed-voltage backplanes), provided current-limiting resistors are used to keep IIK within ±20mA limits.

Does the 74AHCT1G126QSE-7 support hot-swap insertion in live backplanes?

Yes - its 3-state output and high-impedance leakage (≤10 µA) allow safe insertion into powered buses. However, OE must be held LOW during insertion to prevent bus contention; proper sequencing requires external control of OE prior to V_CC stabilization.

How does the Schmitt-trigger input improve system reliability?

The Schmitt-trigger action provides ~0.5V hysteresis, eliminating chatter on slow-rising signals from mechanical switches, thermistors, or long PCB traces. This prevents metastability and false clocking in microcontroller GPIOs, especially critical in automotive environments with high EMI.

Is the SOT353 package compatible with standard reflow profiles for lead-free soldering?

Yes - the SOT353 package has Moisture Sensitivity Level 1 per J-STD-020 and uses matte tin-plated leads compliant with MIL-STD-202 Method 208. Standard IPC/JEDEC J-STD-020D reflow profiles apply, with peak temperature ≤260°C and time above liquidus 60–150 seconds.

74AHCT1G126QSE-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AHCT

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 1

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 8mA, 8mA

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:: SOT-353

74AHCT1G126QSE-7 FAQ

1.How can I place an order for 74AHCT1G126QSE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT1G126QSE-7 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 74AHCT1G126QSE-7 reliable?

The price and inventory of 74AHCT1G126QSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G126QSE-7 is usually 5 days.

3.What payment methods are accepted for 74AHCT1G126QSE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G126QSE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT1G126QSE-7?

74AHCT1G126QSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT1G126QSE-7 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 74AHCT1G126QSE-7?

For technical support, including 74AHCT1G126QSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G126QSE-7 requirements.

6.How does Aetrix verify that 74AHCT1G126QSE-7 is sourced from the original manufacturer or authorized distributors?

All 74AHCT1G126QSE-7 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 74AHCT1G126QSE-7 meets industry standards.

7.What is the process for return or replacement of 74AHCT1G126QSE-7?

All 74AHCT1G126QSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G126QSE-7, 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 74AHCT1G126QSE-7 part is unused and in its original packaging.

Return procedure for 74AHCT1G126QSE-7:

1.Submit a request within 90 days.

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

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