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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

Diodes Incorporated 74AHC1G02QSE-7

Name: 74AHC1G02QSE-7
Brand: Diodes Incorporated
SKU: 74AHC1G02QSE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHC1G02QSE-7

Manufacturer:: Diodes Incorporated

Category:: Gates and Inverters

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

Datasheet:: 74AHC1G02QSE-7.pdf

Description:: IC GATE NOR 1CH 2-INP SOT353

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Product details

Overview

74AHC1G02QSE-7 from Diodes Incorporated is an automotive-grade single 2-input positive NOR gate in SOT353 package, operating from 2.0V to 5.5V supply, delivering ±8mA output drive at 4.5V, with propagation delay as low as 3.2ns (VCC = 5V, CL = 15pF), and qualified per AEC-Q100 Grade 1 (–40°C to +125°C) for engine control and body electronics applications.

For engineers reviewing the 74AHC1G02QSE-7 datasheet, 74AHC1G02QSE-7 pinout, 74AHC1G02QSE-7 application, or 74AHC1G02QSE-7 equivalent, this page delivers verified pin functions, automotive-qualified timing and drive specs, input tolerance beyond VCC, Schmitt-triggered inputs for noise immunity, and real-world logic-level translation use cases in constrained PCB space.

Technical Context

The 74AHC1G02QSE-7 implements a standard positive NOR Boolean function (Y = A + B) using advanced CMOS process technology, with balanced high/low output drive strength and matched propagation delays across input-to-output paths. Its Schmitt-trigger inputs accept slow-rising signals without oscillation, supporting direct interfacing with noisy sensors or open-drain sources.

Designed for automotive ambient operation (–40°C to +125°C), it features ESD protection exceeding 2kV HBM and 1kV CDM per AEC-Q100, latch-up immunity >100mA, and operates reliably across full 2.0V–5.5V supply range - enabling compatibility with 3.3V microcontrollers and 5V legacy systems alike.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Single 2-input positive NOR gate (Y = A + B)
Supply Voltage Range	2.0V to 5.5V - supports mixed-voltage system interfacing
Output Drive	±8mA at VCC = 4.5V - sufficient to drive multiple 74AHC inputs or small LEDs
Propagation Delay	3.2ns typical (VCC = 5V, CL = 15pF) - enables sub-100MHz toggle rates in combinatorial logic paths
Input Threshold	Schmitt-trigger hysteresis - rejects <100mV noise on slow edges, eliminating need for external RC filtering
Operating Temperature	–40°C to +125°C (Grade 1) - validated for under-hood automotive placement
ESD Rating	2000V HBM, 1000V CDM - exceeds AEC-Q100-002/-011 requirements for production reliability

Pinout & Package

SOT353 (2.15mm × 2.1mm × 1.1mm, 0.65mm pitch) - ultra-compact 5-pin surface-mount package optimized for high-density automotive PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (A)	Data Input	Active-high logic input with Schmitt trigger; tolerant of voltages up to 6.5V independent of VCC
2 (B)	Data Input	Second active-high logic input; identical electrical behavior to Pin 1
3 (GND)	Ground Reference	Primary return path for output current and internal bias; must be low-impedance for noise immunity
4 (Y)	Data Output	Push-pull CMOS output capable of sourcing/sinking ±8mA; compatible with 3.3V/5V logic families
5 (VCC)	Supply Voltage	Power rail connection; decoupling capacitor (100nF) required within 3mm for stable switching

Key Features

Feature	Design Value
Schmitt-trigger inputs	Enables robust operation with slow or noisy signals (e.g., mechanical switch debouncing, sensor outputs) without external hysteresis circuitry
AEC-Q100 Grade 1 qualification	Validated for continuous operation at –40°C to +125°C ambient - suitable for powertrain and chassis modules
V_I tolerance beyond V_CC	Inputs accept up to 6.5V regardless of VCC setting - allows safe interfacing with higher-voltage subsystems (e.g., 5V sensors into 3.3V MCU domains)
Low dynamic power consumption	Typical ICC = 1µA at VCC = 5.5V, TA = +25°C - reduces thermal load in always-on vehicle modules
Lead-free & halogen-free	Fully RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb); meets automotive ELV Directive requirements

Applications

Engine Control Unit (ECU) Signal Conditioning

Automotive Body Control Module (BCM)

Use Scenario: Combining two fault signals (e.g., camshaft and crankshaft position error flags) to generate a unified "engine sync loss" alert.

IC Role / Device Role / Timing Role: Combinatorial logic gate performing real-time NOR function with <7ns propagation delay to meet ASIL-B timing constraints.

Use Value: Eliminates need for software polling or larger FPGA resources; ensures deterministic response within 10ns window for safety-critical diagnostics.

Use Scenario: Enabling door lock actuation only when both "key fob detected" and "door handle pressed" signals are asserted.

IC Role / Device Role / Timing Role: Hardware-level security interlock gate with Schmitt-trigger inputs rejecting EMI from nearby RF receivers.

Use Value: Prevents false triggering from transient noise; reduces MCU GPIO count and firmware complexity in Class A interior modules.

Industrial Sensor Interface Board

Automotive Infotainment Power Sequencing

Use Scenario: Validating dual redundant temperature sensor readings before enabling heater control in battery thermal management systems.

IC Role / Device Role / Timing Role: Fail-safe logic element verifying agreement between two analog-to-digital converter outputs via digital comparison.

Use Value: Provides hardware-enforced redundancy check independent of processor uptime - critical for ISO 26262 ASIL-C compliance.

Use Scenario: Generating a "system ready" signal only after both main SoC power rail and display backlight enable are confirmed active.

IC Role / Device Role / Timing Role: Power-good arbitration gate ensuring strict sequencing order between 1.1V core and 12V display supplies.

Use Value: Prevents latch-up or data corruption during cold boot by enforcing hardware-level dependency between power domains.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single 2-input NOR gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G02DBVR	Wider VCC range (1.65V–5.5V); lower I_OH/I_OL (±24mA max); no AEC-Q100 qualification	Qualified for commercial/industrial use only; not approved for automotive under-hood deployment	Select when cost-sensitive non-automotive designs require broader low-voltage support down to 1.65V.
74AUP1G02GW,125	Lower static current (I_CC = 0.9µA typ); slower t_PD (7.3ns @ 3.3V); AEC-Q100 Grade 2 (–40°C to +105°C)	Limited to cabin-located modules (e.g., HVAC controls); insufficient junction temp margin for engine bay	Choose for ultra-low-power infotainment peripherals where 105°C ambient suffices and sub-1µA quiescent current is mandatory.

Compared with SN74LVC1G02DBVR and 74AUP1G02GW,125, the 74AHC1G02QSE-7 uniquely combines AEC-Q100 Grade 1 qualification, ±8mA drive at 4.5V, and Schmitt-trigger inputs - making it the only option among the three validated for under-hood logic conditioning with noise-immune signal integrity.

Availability

74AHC1G02QSE-7 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and industrial sensor interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC1G02QSE-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 74AHC logic family targets automotive and industrial applications demanding wide voltage operation, robust ESD performance, and AEC-Q100 qualification - with the 74AHC1G02QSE-7 specifically engineered for space-constrained NOR logic in harsh environments.

FAQ

Is the 74AHC1G02QSE-7 pin-compatible with other SOT353-packaged logic gates?

Yes - the 74AHC1G02QSE-7 uses standard SOT353 pinout (A-B-GND-Y-VCC), matching industry-standard footprints for single-gate logic devices. This enables drop-in replacement with other SOT353 NOR, NAND, or inverter gates from Diodes Incorporated and compatible vendors, provided voltage and timing requirements align.

Can unused inputs be left floating?

No - unused inputs must be tied to VCC or GND per the datasheet recommendation. Floating inputs risk metastability, increased ICC, and potential oscillation due to noise coupling; the Schmitt-trigger design does not eliminate this requirement despite its hysteresis.

What is the maximum capacitive load the 74AHC1G02QSE-7 can drive reliably?

The device is characterized up to 50pF load capacitance, with tPD increasing from 3.2ns to 7.5ns (VCC = 5V). Driving >50pF may cause excessive rise/fall times or output overshoot; for heavier loads, add series termination or buffer stages to maintain signal integrity.

Does the 74AHC1G02QSE-7 support mixed-voltage interfacing between 3.3V and 5V systems?

Yes - its inputs tolerate up to 6.5V regardless of VCC, and outputs swing rail-to-rail. When VCC = 3.3V, it safely accepts 5V inputs and drives 3.3V logic; when VCC = 5V, it interfaces natively with 5V systems while maintaining AEC-Q100 compliance.

74AHC1G02QSE-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AHC

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: NOR Gate

Number of Circuits:: 1

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 2V ~ 5.5V

Current - Quiescent (Max):: 1 µA

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

Input Logic Level - Low:: 0.5V ~ 1.65V

Input Logic Level - High:: 1.5V ~ 3.85V

Max Propagation Delay @ V, Max CL:: 7.5ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-353

74AHC1G02QSE-7 FAQ

1.How can I place an order for 74AHC1G02QSE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHC1G02QSE-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 74AHC1G02QSE-7 reliable?

The price and inventory of 74AHC1G02QSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G02QSE-7 is usually 5 days.

3.What payment methods are accepted for 74AHC1G02QSE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC1G02QSE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHC1G02QSE-7?

74AHC1G02QSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHC1G02QSE-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 74AHC1G02QSE-7?

For technical support, including 74AHC1G02QSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G02QSE-7 requirements.

6.How does Aetrix verify that 74AHC1G02QSE-7 is sourced from the original manufacturer or authorized distributors?

All 74AHC1G02QSE-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 74AHC1G02QSE-7 meets industry standards.

7.What is the process for return or replacement of 74AHC1G02QSE-7?

All 74AHC1G02QSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G02QSE-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 74AHC1G02QSE-7 part is unused and in its original packaging.

Return procedure for 74AHC1G02QSE-7:

1.Submit a request within 90 days.

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

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