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

onsemi MM74HC02MTC

Name: MM74HC02MTC
Brand: onsemi
SKU: MM74HC02MTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM74HC02MTC

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: MM74HC02MTC.pdf

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

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Product details

Overview

MM74HC02MTC from onsemi is a quad 2-input NOR gate IC in TSSOP-14 package, built with advanced silicon-gate CMOS technology. It delivers LS-TTL-compatible propagation delay (8 ns typical at 5 V), operates from 2 V to 6 V supply, and drives up to 10 LS-TTL loads with buffered outputs - used in digital logic control, address decoding, and enable/disable circuitry in industrial microcontroller peripherals.

For engineers reviewing the MM74HC02MTC datasheet, pinout, applications, or equivalent options, key selection criteria include its guaranteed 15 ns max propagation delay at 5 V, ±25 mA output drive per pin, −40°C to +85°C operating range, and Pb-free TSSOP-14 footprint compatibility with space-constrained PCB layouts.

Technical Context

The MM74HC02MTC implements four independent 2-input NOR gates with fully buffered outputs, enabling high noise immunity and consistent fanout across voltage rails. Its input clamping diodes protect against static discharge, and all inputs are compatible with both CMOS and LS-TTL logic levels.

It belongs to the 74HC family, ensuring functional and pin-out compatibility with legacy 74LS devices while delivering CMOS-level quiescent current (≤20 µA at 6 V). The device supports wide-voltage operation (2–6 V) and maintains specified timing performance across −40°C to +85°C ambient temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input NOR gate - provides four independent Boolean OR-NOT operations per package
Propagation Delay	8 ns typical / 15 ns max at VCC = 5 V, CL = 15 pF - enables reliable timing in 25 MHz+ synchronous logic
Supply Voltage Range	2.0 V to 6.0 V - supports mixed-voltage systems including 3.3 V and 5 V logic domains
Output Drive	±25 mA DC per pin - sufficient to directly drive LEDs, small relays, or multiple LS-TTL inputs
Input Thresholds	VIH = 3.15 V min / VIL = 1.35 V max at VCC = 4.5 V - ensures robust noise margin in noisy industrial environments
Quiescent Current	20 µA max at VCC = 6 V - enables low-power standby modes in battery-backed control logic
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded applications without derating

Pinout & Package

TSSOP-14 (Case 948G), Pb-free and halide-free, 5.0 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height - optimized for automated SMT assembly and thermal relief in dense layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	NOR Gate Inputs	Eight total inputs across four gates (e.g., Pin 1 & 2 = Gate 1 inputs; Pin 4 & 5 = Gate 2 inputs)
3, 6, 10, 13	NOR Gate Outputs	Four independent active-low outputs (e.g., Pin 3 = output of Gate 1)
7	GND	Ground reference for all logic and power domains - must be low-impedance connection
14	VCC	Positive supply rail (2–6 V) - requires local 100 nF decoupling near this pin

Key Features

Feature	Design Value
LS-TTL speed with CMOS power	8 ns propagation delay at 5 V while drawing ≤20 µA quiescent current - eliminates speed/power trade-off in portable logic
Wide supply voltage range	2 V to 6 V operation - allows direct interface with 3.3 V microcontrollers and 5 V legacy peripherals without level shifters
High noise immunity	Buffered outputs and input clamp diodes - suppresses EMI-induced glitches in motor-drive or relay-control PCBs
Pb-free and halide-free packaging	TSSOP-14 meets JEDEC J-STD-020B reflow standards - compliant with RoHS and IPC-J-STD-020 for lead-free manufacturing
10 LS-TTL fanout capability	Guaranteed 4 mA high/low output drive - simplifies bus interfacing and reduces need for external buffers

Applications

Industrial PLC I/O Expansion	Microcontroller Peripheral Enable Logic
Use Scenario: Adding discrete digital I/O channels to a programmable logic controller via parallel GPIO expansion. IC Role / Device Role / Timing Role: NOR gate used as active-low enable decoder for 74HC595 shift registers driving relay banks. Use Value: Enables deterministic 15 ns gate-to-output timing for synchronized I/O updates, reducing jitter in real-time control loops.	Use Scenario: Controlling peripheral power-up sequencing and chip-select assertion in an ARM Cortex-M4-based HMI system. IC Role / Device Role / Timing Role: NOR gate combines reset and clock-ready signals to generate a clean, debounced peripheral enable pulse. Use Value: Eliminates external RC debounce networks and ensures sub-20 ns setup/hold margins for SPI peripheral initialization.
Automotive Body Control Module	Consumer Appliance Safety Interlock
Use Scenario: Implementing redundant door-lock status validation in a 12 V automotive BCM using 5 V logic rails. IC Role / Device Role / Timing Role: NOR gate performs logical OR-NOT on dual-sensor inputs to assert lock-failed alarm only when both sensors disagree. Use Value: Provides fail-safe behavior with guaranteed 85°C operation and ±25 mA drive into optocoupler inputs for isolation.	Use Scenario: Enforcing dual-hand safety activation in a commercial microwave oven control panel. IC Role / Device Role / Timing Role: NOR gate acts as interlock combiner: only de-energizes magnetron when both start buttons are simultaneously pressed and held. Use Value: Meets IEC 60730 Class B requirements via hardware-level voting logic - no firmware dependency for critical safety path.

Industrial PLC I/O Expansion

Microcontroller Peripheral Enable Logic

Use Scenario: Adding discrete digital I/O channels to a programmable logic controller via parallel GPIO expansion.

IC Role / Device Role / Timing Role: NOR gate used as active-low enable decoder for 74HC595 shift registers driving relay banks.

Use Value: Enables deterministic 15 ns gate-to-output timing for synchronized I/O updates, reducing jitter in real-time control loops.

Use Scenario: Controlling peripheral power-up sequencing and chip-select assertion in an ARM Cortex-M4-based HMI system.

IC Role / Device Role / Timing Role: NOR gate combines reset and clock-ready signals to generate a clean, debounced peripheral enable pulse.

Use Value: Eliminates external RC debounce networks and ensures sub-20 ns setup/hold margins for SPI peripheral initialization.

Automotive Body Control Module

Consumer Appliance Safety Interlock

Use Scenario: Implementing redundant door-lock status validation in a 12 V automotive BCM using 5 V logic rails.

IC Role / Device Role / Timing Role: NOR gate performs logical OR-NOT on dual-sensor inputs to assert lock-failed alarm only when both sensors disagree.

Use Value: Provides fail-safe behavior with guaranteed 85°C operation and ±25 mA drive into optocoupler inputs for isolation.

Use Scenario: Enforcing dual-hand safety activation in a commercial microwave oven control panel.

IC Role / Device Role / Timing Role: NOR gate acts as interlock combiner: only de-energizes magnetron when both start buttons are simultaneously pressed and held.

Use Value: Meets IEC 60730 Class B requirements via hardware-level voting logic - no firmware dependency for critical safety path.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC02DR	SOIC-14 package (7.5 mm × 5.0 mm); identical AC/DC specs and pinout	Requires larger PCB area; better thermal mass but less suitable for ultra-dense layouts	Select when board space permits and legacy SOIC reflow profiles are standardized
74VHC02MTCX	Higher speed (5.5 ns typ), lower ICC (4 µA max), but narrower VCC range (2–5.5 V)	Not rated for 6 V operation; unsuitable for 5.5 V industrial rails or battery-tolerant designs	Select only when 5 V-only systems demand minimal propagation delay and ultra-low standby current

Compared with SN74HC02DR and 74VHC02MTCX, the MM74HC02MTC uniquely balances compact TSSOP-14 footprint, full 2–6 V operation, and industrial temperature rating - making it optimal for new designs where density, voltage flexibility, and environmental robustness are jointly prioritized.

Availability

MM74HC02MTC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller peripheral enable logic, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MM74HC02MTC 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The MM74HC02MTC belongs to the 74HC logic family - designed specifically for drop-in replacement of legacy TTL in industrial control, instrumentation, and embedded systems where low power, wide voltage operation, and reliability are essential.

FAQ

What is the maximum propagation delay of the MM74HC02MTC at 5 V supply?

The MM74HC02MTC has a guaranteed maximum propagation delay of 15 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C. This value is confirmed in the AC Electrical Characteristics table of the official onsemi datasheet (Rev. 3, April 2024), and applies to both tPHL and tPLH transitions. At wider temperature ranges (−40°C to +85°C), the max delay increases to 18 ns under same conditions.

Does the MM74HC02MTC support 3.3 V logic systems?

Yes, the MM74HC02MTC fully supports 3.3 V logic systems. Its recommended operating supply range is 2.0 V to 6.0 V, and input thresholds (VIH = 2.0 V min, VIL = 0.5 V max at VCC = 3.3 V) ensure reliable interfacing with standard 3.3 V CMOS outputs. The device maintains specified timing and drive strength across this voltage range.

Is the MM74HC02MTC pin-compatible with the 74LS02?

Yes, the MM74HC02MTC is functionally and pin-out compatible with the 74LS02. All four NOR gates occupy identical pin positions in the TSSOP-14 package (matching SOIC-14 pinout), and the device meets LS-TTL voltage thresholds and fanout requirements. This allows direct substitution in existing 74LS02-based designs without PCB changes.

What is the maximum output current per pin for the MM74HC02MTC?

The MM74HC02MTC guarantees ±25 mA DC output current per pin, as specified in the Absolute Maximum Ratings table. Under recommended operating conditions, it delivers ≥4 mA high-level and ≥4 mA low-level output current while maintaining VOH ≥ 4.2 V and VOL ≤ 0.26 V at VCC = 4.5 V - sufficient to drive LEDs, small solenoids, or multiple LS-TTL inputs.

Does the MM74HC02MTC require external pull-up or pull-down resistors on unused inputs?

No, external pull-up or pull-down resistors are not required on unused inputs of the MM74HC02MTC. All inputs feature internal clamp diodes to VCC and GND, and the device specifies VIH/VIL thresholds that remain valid even with floating inputs. However, for best noise immunity and predictable logic state, onsemi recommends tying unused inputs to VCC or GND - not left open.

MM74HC02MTC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HC

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Logic Type:: NOR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 2 µA

Current - Output High, Low:: 5.2mA, 5.2mA

Input Logic Level - Low:: 0.5V ~ 1.8V

Input Logic Level - High:: 1.5V ~ 4.2V

Max Propagation Delay @ V, Max CL:: 15ns @ 6V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

MM74HC02MTC FAQ

1.How can I place an order for MM74HC02MTC through Aetrix?

Please submit a Request for Quotation (RFQ) for MM74HC02MTC 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 MM74HC02MTC reliable?

The price and inventory of MM74HC02MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM74HC02MTC is usually 5 days.

3.What payment methods are accepted for MM74HC02MTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM74HC02MTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM74HC02MTC?

MM74HC02MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM74HC02MTC 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 MM74HC02MTC?

For technical support, including MM74HC02MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM74HC02MTC requirements.

6.How does Aetrix verify that MM74HC02MTC is sourced from the original manufacturer or authorized distributors?

All MM74HC02MTC 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 MM74HC02MTC meets industry standards.

7.What is the process for return or replacement of MM74HC02MTC?

All MM74HC02MTC units undergo pre-shipment inspection (PSI). If there is an issue with MM74HC02MTC, 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 MM74HC02MTC part is unused and in its original packaging.

Return procedure for MM74HC02MTC:

1.Submit a request within 90 days.

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

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