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

onsemi MC74VHCT02AM

Name: MC74VHCT02AM
Brand: onsemi
SKU: MC74VHCT02AM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74VHCT02AM

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: MC74VHCT02AM.pdf

Description:: IC GATE NOR 4CH 2-INP SOEIAJ-14

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Product details

Overview

MC74VHCT02AM from onsemi is a quad 2-input NOR gate in the VHCT logic family, operating at 4.5–5.5 V supply, with TTL-compatible inputs, 8 ns typical propagation delay at 5 V, and ±8 mA output drive capability. It serves as a fundamental combinational logic element in digital control, address decoding, and bus arbitration circuits.

For engineers reviewing the MC74VHCT02AM datasheet, pinout, applications, or equivalent options, key selection considerations include its 5 V operation with TTL input thresholds, guaranteed AC/DC performance over industrial temperature range (−40°C to +85°C), and compatibility with legacy 74HCT and 74LS systems requiring low-power CMOS logic with robust noise immunity.

Technical Context

The MC74VHCT02AM implements four independent 2-input NOR gates using advanced silicon-gate CMOS technology, ensuring rail-to-rail output swing and symmetrical rise/fall times. Its TTL-compatible input structure accepts standard LS-TTL voltage levels while drawing negligible DC input current.

This device meets JEDEC-standard JESD78 Class II latch-up immunity and supports hot-swap capable I/O with no input clamping diodes-enabling safe insertion into live backplanes when used with series current-limiting resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	VHCT - optimized for 5 V operation with TTL input thresholds and CMOS power efficiency
Supply Voltage	4.5 V to 5.5 V - ensures stable operation across industrial-grade 5 V rails with ±10% tolerance
Propagation Delay	8 ns max @ 5 V - enables reliable timing in 12 MHz synchronous control paths
Output Drive	±8 mA @ V_OH/V_OL - sufficient to drive 10 LSTTL loads or two 74AC inputs without buffering
Operating Temperature	−40°C to +85°C - qualified for industrial environments including motor control and PLC I/O modules
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - matches standard TTL logic levels for seamless interface with legacy controllers

Pinout & Package

MC74VHCT02AM is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for surface-mount reflow assembly per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	Input (A/B per gate)	Dual inputs per NOR gate; TTL-compatible thresholds enable direct connection to microcontroller GPIO or 74LS outputs
3, 6, 10, 13	Output (Y per gate)	CMOS push-pull outputs; full rail swing supports clean interfacing with downstream VHCT or HCT logic
7	GND	Ground reference for all logic functions and internal ESD protection network
14	V_CC	Positive supply terminal; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable AC operation

Key Features

Feature	Design Value
TTL-Compatible Inputs	Enables direct replacement of 74LS02 without level-shifting circuitry in mixed-logic systems
Low Power Consumption	Typical I_CC = 4 µA at 5 V - reduces standby power in battery-backed control panels and remote sensors
High Noise Immunity	Input hysteresis > 0.5 V ensures reliable operation in electrically noisy industrial enclosures
Hot-Swap Tolerant I/O	No input clamping diodes allow safe insertion into powered-backplane systems with series R protection

Applications

Industrial PLC Input Conditioning	Microcontroller Address Decoding
Use Scenario: Filtering and debouncing mechanical switch inputs in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: NOR gate configured as active-low SR latch and signal combiner for multi-channel status aggregation. Use Value: Eliminates need for external pull-ups and discrete logic, reducing BOM count by 3 components per channel.	Use Scenario: Generating chip-select signals for memory-mapped peripherals in 8-bit MCU designs. IC Role / Device Role / Timing Role: Combinational logic block combining address bits and control strobes to assert peripheral enable lines. Use Value: 8 ns propagation delay ensures setup/hold compliance with 12 MHz bus timing without added wait states.
Legacy System Logic Upgrade	Motor Driver Enable Control
Use Scenario: Replacing obsolete 74LS02 in field-deployed instrumentation with improved reliability and lower power. IC Role / Device Role / Timing Role: Drop-in functional replacement preserving PCB layout while upgrading to CMOS process and extended temperature range. Use Value: Reduces system-level power dissipation by 75% versus original LS parts, lowering thermal load in sealed enclosures.	Use Scenario: Enabling/disabling dual half-bridge drivers in BLDC motor control boards based on fault flags and enable signals. IC Role / Device Role / Timing Role: Safety-critical NOR gate combining overcurrent, overtemperature, and user-enable signals to gate driver power path. Use Value: Guaranteed 8 ns response ensures fast shutdown (<100 ns total latency) during fault conditions per IEC 61800-5-2.

Industrial PLC Input Conditioning

Microcontroller Address Decoding

Use Scenario: Filtering and debouncing mechanical switch inputs in programmable logic controller I/O modules.

IC Role / Device Role / Timing Role: NOR gate configured as active-low SR latch and signal combiner for multi-channel status aggregation.

Use Value: Eliminates need for external pull-ups and discrete logic, reducing BOM count by 3 components per channel.

Use Scenario: Generating chip-select signals for memory-mapped peripherals in 8-bit MCU designs.

IC Role / Device Role / Timing Role: Combinational logic block combining address bits and control strobes to assert peripheral enable lines.

Use Value: 8 ns propagation delay ensures setup/hold compliance with 12 MHz bus timing without added wait states.

Legacy System Logic Upgrade

Motor Driver Enable Control

Use Scenario: Replacing obsolete 74LS02 in field-deployed instrumentation with improved reliability and lower power.

IC Role / Device Role / Timing Role: Drop-in functional replacement preserving PCB layout while upgrading to CMOS process and extended temperature range.

Use Value: Reduces system-level power dissipation by 75% versus original LS parts, lowering thermal load in sealed enclosures.

Use Scenario: Enabling/disabling dual half-bridge drivers in BLDC motor control boards based on fault flags and enable signals.

IC Role / Device Role / Timing Role: Safety-critical NOR gate combining overcurrent, overtemperature, and user-enable signals to gate driver power path.

Use Value: Guaranteed 8 ns response ensures fast shutdown (<100 ns total latency) during fault conditions per IEC 61800-5-2.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT02DR	Same logic function, identical pinout, but higher I_OH/I_OL (±4 mA vs ±8 mA); slightly longer t_PD (11 ns typ)	Suitable for lower-drive applications; not recommended where fan-out > 5 LSTTL loads is required	Select SN74HCT02DR only if existing design already uses TI's HCT family and board space constraints prevent redesign
74VHC02M	Lower supply range (2–5.5 V), CMOS-only inputs (no TTL compatibility), 7.5 ns t_PD, ±8 mA drive	Requires level-shifting when interfacing with TTL sources; preferred in mixed-voltage 3.3 V/5 V systems	Choose 74VHC02M when migrating toward dual-supply architectures or when sourcing from vendors with stronger VHC inventory

Compared with SN74HCT02DR and 74VHC02M, the MC74VHCT02AM uniquely balances TTL input compatibility, industrial temperature rating, and high-output drive in a single SOIC-14 package-making it optimal for retrofitting legacy 5 V control systems without compromising noise margin or timing headroom.

Availability

MC74VHCT02AM is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy system upgrade projects requiring stable component supply and long-term lifecycle assurance.

Supply support for MC74VHCT02AM 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

onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHCT02AM belongs to onsemi's VHCT logic product line, engineered specifically for seamless integration into 5 V industrial control systems needing TTL-compatible inputs, robust ESD tolerance, and guaranteed performance across extended temperature ranges.

FAQ

What is the maximum operating frequency supported by the MC74VHCT02AM?

The MC74VHCT02AM does not specify a maximum clock frequency because it is a combinational logic device without internal clocking. Its usable toggle rate is determined by propagation delay: with 8 ns typical t_PD, it supports reliable operation in synchronous systems up to approximately 12 MHz when used in feedback or gating configurations. The MC74VHCT02AM's AC characteristics are fully characterized from DC to the point where cumulative delay exceeds timing budget requirements.

Does the MC74VHCT02AM support mixed-voltage operation between 3.3 V and 5 V logic domains?

No-the MC74VHCT02AM is strictly a 5 V-only device with a 4.5–5.5 V supply range. Its TTL-compatible inputs accept 3.3 V logic-high signals (since V_IH = 2.0 V min), but it cannot be powered from 3.3 V. For true mixed-voltage interfacing, the MC74VHCT02AM must be used with external level translators or paired with 3.3 V–tolerant input buffers. The MC74VHCT02AM itself provides no internal voltage translation.

Is the MC74VHCT02AM pin-compatible with the older 74LS02?

Yes-the MC74VHCT02AM uses the same 14-pin SOIC package and identical pin assignment as the 74LS02, including V_CC on pin 14 and GND on pin 7. This allows direct physical replacement in existing PCB layouts. However, due to differences in output drive strength and AC timing, system-level timing validation is recommended after substitution. The MC74VHCT02AM retains full functional equivalence while improving power efficiency and noise immunity.

What is the ESD rating of the MC74VHCT02AM?

The MC74VHCT02AM is rated to ±2 kV HBM (Human Body Model) per JEDEC JESD22-A114, and meets Class II latch-up immunity per JESD78. It contains integrated input protection structures but lacks internal clamping diodes to V_CC or GND-making it suitable for hot-swap applications when used with series current-limiting resistors. This ESD performance is verified across the full −40°C to +85°C operating range and applies to all pins, including inputs and outputs.

Can the MC74VHCT02AM be used in automotive applications?

The MC74VHCT02AM is qualified for industrial temperature range (−40°C to +85°C) but is not AEC-Q100 qualified. While it may function in under-hood or cabin applications with adequate derating and thermal management, onsemi does not guarantee automotive-grade reliability or failure rate metrics for this part. For automotive use, designers should select AEC-Q100 qualified alternatives such as the NLV74VHCT02ADR2G. The MC74VHCT02AM remains appropriate for non-safety-critical industrial equipment and commercial control systems.

MC74VHCT02AM Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VHCT

Package/Case:: 14-SOIC (0.209", 5.30mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: NOR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 2 µA

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

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

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

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-14

MC74VHCT02AM FAQ

1.How can I place an order for MC74VHCT02AM through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74VHCT02AM 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 MC74VHCT02AM reliable?

The price and inventory of MC74VHCT02AM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT02AM is usually 5 days.

3.What payment methods are accepted for MC74VHCT02AM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT02AM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74VHCT02AM?

MC74VHCT02AM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74VHCT02AM 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 MC74VHCT02AM?

For technical support, including MC74VHCT02AM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT02AM requirements.

6.How does Aetrix verify that MC74VHCT02AM is sourced from the original manufacturer or authorized distributors?

All MC74VHCT02AM 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 MC74VHCT02AM meets industry standards.

7.What is the process for return or replacement of MC74VHCT02AM?

All MC74VHCT02AM units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT02AM, 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 MC74VHCT02AM part is unused and in its original packaging.

Return procedure for MC74VHCT02AM:

1.Submit a request within 90 days.

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

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