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

onsemi 74LCX32M

Name: 74LCX32M
Brand: onsemi
SKU: 74LCX32M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LCX32M

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: 74LCX32M.pdf

Description:: IC GATE OR 4CH 2-INP 14SOIC

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Product details

Overview

74LCX32M from ON Semiconductor is a low-voltage quad 2-input OR gate IC with 5V-tolerant inputs, designed for level-shifting between 3.3V and 5V logic domains. It operates from 2.3V to 3.6V V_CC, delivers ≤5.5ns propagation delay at 3.3V, supports ±24mA output drive, and features power-down high-impedance I/O for bus-hold applications in mixed-voltage embedded control systems.

For engineers reviewing the 74LCX32M datasheet, pinout, applications, or equivalent options, this device is selected for voltage translation in FPGA I/O expansion, microcontroller peripheral interfacing, and industrial PLC input conditioning where rail-to-rail input tolerance and sub-6ns timing are required.

Technical Context

The 74LCX32M implements four independent non-inverting OR logic functions using advanced CMOS process technology. Its input structure includes protection diodes enabling safe operation with VI up to 7V while powered from 2.3–3.6V, making it suitable for bidirectional 5V-to-3.3V interface without external resistors.

Each gate exhibits matched t_PHL/t_PLH propagation delays (≤5.5ns @ V_CC = 3.3V, C_L = 50pF), output skew ≤1.0ns, and dynamic noise suppression circuitry to minimize switching-induced ground bounce in dense PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3V to 3.6V - Enables direct integration into 3.3V supply domains without level shifters
Input Voltage Tolerance	Up to 7V - Allows safe connection to 5V buses without clamping diodes or series resistors
t_PD Max	5.5ns @ V_CC = 3.3V - Supports >100MHz toggle rates in combinatorial logic paths
I_OH/I_OL	±24mA @ V_CC = 3.0V - Drives multiple LVTTL or CMOS loads without fanout limitation
I_CC Max	10µA - Enables ultra-low static power in battery-backed or always-on subsystems
ESD HBM	>2000V - Meets industrial IEC 61000-4-2 system-level robustness requirements
Operating Temp	–40°C to +85°C - Qualified for extended-temperature industrial and automotive under-hood environments

Pinout & Package

74LCX32M is housed in a 14-lead SOIC (JEDEC MS-012, 0.150" narrow body) with standard dual-inline pinout and gull-wing leads. The package is lead-free per JEDEC J-STD-020B and compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 12, 13	Input (A1/B1/A2/B2/A3/B3/A4/B4)	Four independent OR gate inputs; each tolerant to 7V regardless of V_CC
3, 6, 10, 11	Output (Y1/Y2/Y3/Y4)	CMOS-compatible outputs with ±24mA sink/source capability at 3.0V
7	GND	Ground reference for all logic and power domains; must be low-inductance connection
14	V_CC	Primary supply pin; decoupling capacitor (0.1µF ceramic) required within 5mm

Key Features

Feature	Design Value
5V-tolerant inputs	Enables direct interconnection between legacy 5V peripherals and modern 3.3V controllers without external components
Power-down high-Z I/O	Inputs and outputs enter high-impedance state when V_CC = 0V, preventing back-driving during hot-swap or power sequencing
Low dynamic noise	Proprietary EMI reduction circuitry limits simultaneous switching output (SSO) noise to <±0.8V peak VOL/VOLV
Latch-up immunity	Exceeds JEDEC 78 Class II (≥500mA) - eliminates risk of destructive latch-up in noisy industrial environments
Leadless DQFN option available	MLP14A package variant enables space-constrained designs requiring 2.5 × 3.0 mm footprint

Applications

Industrial PLC Input Module	FPGA I/O Expansion Interface
Use Scenario: Converting 5V sensor signals (e.g., limit switches, photoelectric sensors) to 3.3V logic levels for microcontroller input capture. IC Role / Device Role / Timing Role: Level-translating OR gate performing wired-OR signal aggregation before MCU GPIO sampling. Use Value: Eliminates need for discrete resistor-divider networks or dedicated level translators, reducing BOM count and layout area by 60%.	Use Scenario: Extending FPGA bank I/O to support legacy 5V parallel interfaces (e.g., LCD data bus, memory-mapped peripherals). IC Role / Device Role / Timing Role: Bidirectional voltage translator implementing OR logic for status flag merging across voltage domains. Use Value: Achieves deterministic 5.5ns propagation delay with no timing closure penalty versus discrete solutions.
Microcontroller Peripheral Bus	Automotive Body Control Unit
Use Scenario: Interfacing 5V automotive CAN transceivers or LIN drivers to 3.3V microcontroller GPIOs in gateway modules. IC Role / Device Role / Timing Role: Isolating 5V fault currents while preserving logic state integrity during transient overvoltage events. Use Value: Withstands 7V input transients per JEDEC JESD78, eliminating need for TVS diodes on every signal line.	Use Scenario: Implementing diagnostic OR logic for multi-sensor fault detection (e.g., door open + window down + key-in-ignition). IC Role / Device Role / Timing Role: Combinatorial logic element aggregating safety-critical status flags prior to watchdog timeout evaluation. Use Value: –40°C to +85°C qualification and >2000V HBM ESD ensure reliable operation in under-dash temperature cycling environments.

Industrial PLC Input Module

FPGA I/O Expansion Interface

Use Scenario: Converting 5V sensor signals (e.g., limit switches, photoelectric sensors) to 3.3V logic levels for microcontroller input capture.

IC Role / Device Role / Timing Role: Level-translating OR gate performing wired-OR signal aggregation before MCU GPIO sampling.

Use Value: Eliminates need for discrete resistor-divider networks or dedicated level translators, reducing BOM count and layout area by 60%.

Use Scenario: Extending FPGA bank I/O to support legacy 5V parallel interfaces (e.g., LCD data bus, memory-mapped peripherals).

IC Role / Device Role / Timing Role: Bidirectional voltage translator implementing OR logic for status flag merging across voltage domains.

Use Value: Achieves deterministic 5.5ns propagation delay with no timing closure penalty versus discrete solutions.

Microcontroller Peripheral Bus

Automotive Body Control Unit

Use Scenario: Interfacing 5V automotive CAN transceivers or LIN drivers to 3.3V microcontroller GPIOs in gateway modules.

IC Role / Device Role / Timing Role: Isolating 5V fault currents while preserving logic state integrity during transient overvoltage events.

Use Value: Withstands 7V input transients per JEDEC JESD78, eliminating need for TVS diodes on every signal line.

Use Scenario: Implementing diagnostic OR logic for multi-sensor fault detection (e.g., door open + window down + key-in-ignition).

IC Role / Device Role / Timing Role: Combinatorial logic element aggregating safety-critical status flags prior to watchdog timeout evaluation.

Use Value: –40°C to +85°C qualification and >2000V HBM ESD ensure reliable operation in under-dash temperature cycling environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate logic applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC32APWR	Lower V_CC range (1.65–3.6V); 5V-tolerant inputs only up to 5.5V (not 7V)	Not suitable for 7V transient environments; requires tighter input voltage control	Select when operating exclusively in 1.8V/3.3V systems with no 5V bus exposure
74ALVC32M	Higher speed (t_PD ≤ 3.3ns @ 3.3V); same 5V-tolerant input spec but lower drive (±24mA only at V_CC ≥ 2.7V)	Better for high-frequency clock distribution; less margin for marginal V_CC conditions	Select when propagation delay is critical and V_CC is stable ≥2.7V

Compared with SN74LVC32APWR and 74ALVC32M, the 74LCX32M provides superior 7V input tolerance and guaranteed ±24mA drive down to 2.3V V_CC, making it optimal for mixed-voltage industrial control where robustness outweighs marginal speed gains.

Availability

74LCX32M is available at Aetrix Electronics and suitable for industrial PLC input modules, FPGA I/O expansion interfaces, and automotive body control units requiring stable component supply across extended temperature ranges and mixed-voltage signal chains.

Supply support for 74LCX32M 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

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

The 74LCX32M belongs to the LCX family of low-voltage, high-speed logic devices engineered specifically for seamless voltage-domain bridging in mixed-supply digital systems.

FAQ

What is the maximum input voltage rating for 74LCX32M?

The 74LCX32M supports DC input voltages up to 7.0V regardless of V_CC level, enabling direct interfacing with 5V TTL and CMOS buses without external protection. This specification is verified per Absolute Maximum Ratings table in Fairchild Rev. 1.6.1 datasheet and remains valid under ON Semiconductor's post-integration documentation.

Does 74LCX32M support power-down mode with high-impedance I/O?

Yes, the 74LCX32M enters a power-down state when V_CC = 0V, placing both inputs and outputs in high-impedance mode. This prevents back-driving of powered circuits during hot-swap or partial-power-down sequences, as confirmed in the General Description and Pin Description sections of the datasheet.

What is the typical propagation delay of 74LCX32M at 3.3V supply?

The 74LCX32M achieves a maximum propagation delay of 5.5ns at V_CC = 3.3V ± 0.3V with C_L = 50pF, as specified in the AC Electrical Characteristics table. This value applies to both t_PHL and t_PLH under worst-case industrial temperature conditions (–40°C to +85°C).

Can 74LCX32M be used in 2.5V systems?

Yes, the 74LCX32M is fully specified for operation at V_CC = 2.5V ± 0.2V, with AC performance characterized at 6.6ns max t_PHL/t_PLH and DC parameters including VOL ≤ 0.55V at I_OL = 24mA. This is explicitly documented in the Recommended Operating Conditions and AC Electrical Characteristics tables.

Is 74LCX32M pin-compatible with standard 74-series OR gates?

No, the 74LCX32M uses the industry-standard 14-pin SOIC pinout for quad 2-input OR gates (e.g., matches 74HC32, 74HCT32, 74LVC32), but its internal architecture and 5V-tolerant input design differ. While pin assignments align, electrical behavior-including input voltage range and output drive-requires validation against target system requirements before drop-in replacement.

74LCX32M Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LCX

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

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: OR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 2V ~ 3.6V

Current - Quiescent (Max):: 10 µA

Current - Output High, Low:: 24mA, 24mA

Input Logic Level - Low:: 0.7V ~ 0.8V

Input Logic Level - High:: 1.7V ~ 2V

Max Propagation Delay @ V, Max CL:: 5.5ns @ 3.3V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

74LCX32M FAQ

1.How can I place an order for 74LCX32M through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LCX32M 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 74LCX32M reliable?

The price and inventory of 74LCX32M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX32M is usually 5 days.

3.What payment methods are accepted for 74LCX32M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX32M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LCX32M?

74LCX32M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LCX32M 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 74LCX32M?

For technical support, including 74LCX32M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX32M requirements.

6.How does Aetrix verify that 74LCX32M is sourced from the original manufacturer or authorized distributors?

All 74LCX32M 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 74LCX32M meets industry standards.

7.What is the process for return or replacement of 74LCX32M?

All 74LCX32M units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX32M, 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 74LCX32M part is unused and in its original packaging.

Return procedure for 74LCX32M:

1.Submit a request within 90 days.

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

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