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

onsemi MC74AC132MELG

Name: MC74AC132MELG
Brand: onsemi
SKU: MC74AC132MELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74AC132MELG

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MC74AC132MELG.pdf

Description:: IC GATE NAND 4CH 2-INP SOEIAJ-14

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Product details

Overview

MC74AC132MELG from onsemi is a quad 2-input NAND Schmitt trigger IC in SOIC-14 package, operating from 2.0 V to 6.0 V supply, delivering ±24 mA output drive, with input hysteresis up to 1.6 V at 5.5 V, and propagation delay as low as 9.0 ns at 5.0 V - used for noise-immune signal conditioning in industrial control logic interfaces.

For engineers reviewing the MC74AC132MELG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, validated SOIC-14 pin mapping, real-world use cases in edge-detection and waveform shaping, and two confirmed alternative parts with documented functional and voltage-level differences.

Technical Context

The MC74AC132MELG implements four independent 2-input NAND gates, each with integrated Schmitt-trigger inputs that provide hysteresis-based noise rejection. Its input thresholds are temperature- and supply-voltage-stable due to resistor-ratio-defined positive feedback architecture.

It operates in high-performance silicon-gate CMOS technology, supports rail-to-rail input voltage range (0 to V_CC), and features TTL-compatible output drive capability without requiring external pull-ups. The device is not TTL-input compatible - that applies only to the MC74ACT132 variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input NAND with Schmitt-trigger inputs - enables clean digital output from slow or noisy analog-like signals
Supply Voltage Range	2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V
Output Drive	±24 mA per output - sufficient to directly drive LEDs, small relays, or interface with standard CMOS/TTL loads
Propagation Delay	9.0 ns max at V_CC = 5.0 V, CL = 50 pF - ensures timing-critical signal conditioning in sub-100 MHz logic paths
Hysteresis Width	1.6 V max at V_CC = 5.5 V - provides robust immunity to EMI and contact bounce in mechanical switch debouncing
Input Thresholds	V_t+ = 3.9 V, V_t− = 1.1 V at V_CC = 5.5 V - defines precise switching windows for asymmetrical signal recovery
Quiescent ICC	40 µA max at V_CC = 5.5 V - enables low-static-power operation in always-on sensing subsystems

Pinout & Package

MC74AC132MELG is housed in a Pb-free SOIC-14 (Case 751A) surface-mount package, 8.75 mm × 3.9 mm × 1.75 mm, with 1.27 mm pitch, moisture sensitivity level 1, and rated for −40°C to +85°C ambient operation.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 8, 9, 12, 13	Input A/B of NAND gates	Schmitt-trigger inputs - accept slow-rising/falling signals and reject noise between thresholds
3, 4, 10, 11	Output Y of NAND gates	CMOS push-pull outputs - source/sink up to 24 mA, rail-to-rail swing
7	GND	Ground reference for all logic and power domains - must be low-impedance return path
14	V_CC	Positive supply input - decoupling capacitor (0.1 µF) required within 10 mm of pin

Key Features

Feature	Design Value
Schmitt-trigger inputs	Enables reliable edge detection on slowly varying or noisy waveforms without external hysteresis components
±24 mA output drive	Eliminates need for buffer stages when driving moderate capacitive or resistive loads
Pb-free SOIC-14 package	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements
Wide V_CC range (2.0–6.0 V)	Permits direct integration into 3.3 V, 5 V, and legacy 2.5 V logic systems without level shifters
Low ICC (40 µA max)	Reduces standby power in battery-backed or energy-constrained monitoring circuits

Applications

Industrial Switch Debouncing	Waveform Shaping
Use Scenario: Mechanical pushbuttons and limit switches generate contact bounce lasting 1–10 ms, causing false triggers in PLC I/O modules. IC Role / Device Role / Timing Role: MC74AC132MELG acts as a hardware debouncer - its Schmitt input hysteresis rejects sub-threshold transients while cleanly squaring the switch transition. Use Value: Eliminates need for microcontroller polling or RC+software filtering; reduces firmware complexity and improves deterministic response time.	Use Scenario: Sine or triangle waveforms from sensors or oscillators require conversion to clean square waves for clocking or counting circuits. IC Role / Device Role / Timing Role: MC74AC132MELG functions as a zero-crossing comparator substitute - its dual-threshold input shapes analog inputs into jitter-free digital edges. Use Value: Achieves <10 ns pulse jitter at 5 MHz input rates without external comparators or op-amps, simplifying analog-to-digital interface design.
Power-On Reset Conditioning	Noise-Immune Sensor Interface
Use Scenario: Microcontroller reset lines require clean, monotonic assertion/deassertion during power ramp-up, but supply rails exhibit overshoot and ripple. IC Role / Device Role / Timing Role: MC74AC132MELG serves as a threshold-controlled POR generator - one gate monitors V_CC via resistor divider, triggering reset only after stable voltage crossing. Use Value: Prevents premature MCU boot from brown-out conditions; eliminates reliance on dedicated reset ICs in cost-sensitive designs.	Use Scenario: Proximity sensors (e.g., inductive or capacitive) output low-amplitude, EMI-prone analog signals in factory-floor environments. IC Role / Device Role / Timing Role: MC74AC132MELG acts as front-end signal conditioner - its hysteresis rejects RF noise and line-frequency interference before digitization. Use Value: Increases effective SNR by >20 dB versus standard logic gates; enables reliable detection at >3 m distance without shielded cabling.

Industrial Switch Debouncing

Waveform Shaping

Use Scenario: Mechanical pushbuttons and limit switches generate contact bounce lasting 1–10 ms, causing false triggers in PLC I/O modules.

IC Role / Device Role / Timing Role: MC74AC132MELG acts as a hardware debouncer - its Schmitt input hysteresis rejects sub-threshold transients while cleanly squaring the switch transition.

Use Value: Eliminates need for microcontroller polling or RC+software filtering; reduces firmware complexity and improves deterministic response time.

Use Scenario: Sine or triangle waveforms from sensors or oscillators require conversion to clean square waves for clocking or counting circuits.

IC Role / Device Role / Timing Role: MC74AC132MELG functions as a zero-crossing comparator substitute - its dual-threshold input shapes analog inputs into jitter-free digital edges.

Use Value: Achieves <10 ns pulse jitter at 5 MHz input rates without external comparators or op-amps, simplifying analog-to-digital interface design.

Power-On Reset Conditioning

Noise-Immune Sensor Interface

Use Scenario: Microcontroller reset lines require clean, monotonic assertion/deassertion during power ramp-up, but supply rails exhibit overshoot and ripple.

IC Role / Device Role / Timing Role: MC74AC132MELG serves as a threshold-controlled POR generator - one gate monitors V_CC via resistor divider, triggering reset only after stable voltage crossing.

Use Value: Prevents premature MCU boot from brown-out conditions; eliminates reliance on dedicated reset ICs in cost-sensitive designs.

Use Scenario: Proximity sensors (e.g., inductive or capacitive) output low-amplitude, EMI-prone analog signals in factory-floor environments.

IC Role / Device Role / Timing Role: MC74AC132MELG acts as front-end signal conditioner - its hysteresis rejects RF noise and line-frequency interference before digitization.

Use Value: Increases effective SNR by >20 dB versus standard logic gates; enables reliable detection at >3 m distance without shielded cabling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger NAND applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LV132APWR	Lower V_CC range (2.0–5.5 V); 8 mA output drive; 11 ns max t_PHL at 3.3 V	Optimized for 3.3 V systems only; insufficient drive for 5 V bus termination or LED indicators	Select when operating exclusively at 3.3 V and board space is constrained (TSSOP-14 footprint)
74HC132D,653	Same SOIC-14 package; 5.2 V max V_CC; 4 mA output drive; 21 ns max t_PLH at 4.5 V	Limited noise margin and slower edge rate - unsuitable for high-EMI industrial settings or fast-switching sensors	Choose for cost-sensitive consumer products where full 6 V tolerance and ±24 mA drive are unnecessary

Compared with SN74LV132APWR and 74HC132D,653, the MC74AC132MELG offers superior noise immunity (1.6 V hysteresis), higher drive strength (±24 mA), and broader supply range (up to 6.0 V), making it optimal for industrial-grade signal conditioning where reliability under voltage fluctuation and EMI is critical.

Availability

MC74AC132MELG is available at Aetrix Electronics and suitable for industrial automation, sensor interface design, and embedded control systems requiring stable component supply across long production lifecycles.

Supply support for MC74AC132MELG 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 focused on energy-efficient electronics, delivering power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74AC132MELG belongs to the 74AC high-speed CMOS logic family, engineered for robust noise immunity and wide-supply operation in industrial control, instrumentation, and factory automation systems where signal integrity under harsh electrical conditions is essential.

FAQ

What is the maximum supply voltage rating for MC74AC132MELG?

The absolute maximum DC supply voltage (V_CC) for MC74AC132MELG is +6.5 V, but the recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V risks exceeding internal oxide breakdown limits and is not guaranteed for reliability or parametric performance. Always refer to the Absolute Maximum Ratings table on page 2 of the official onsemi datasheet for MC74AC132MELG.

Does MC74AC132MELG have TTL-compatible inputs?

No, MC74AC132MELG does not have TTL-compatible inputs. That feature applies only to the MC74ACT132 variant. The MC74AC132MELG uses standard CMOS input thresholds (V_t+ ≈ 3.9 V at 5.5 V V_CC), which differ from TTL's 2.0 V VIH minimum. Interfacing with TTL outputs may require level-shifting or verification of voltage compatibility per application conditions.

What is the typical hysteresis voltage of MC74AC132MELG at 5.0 V supply?

At V_CC = 5.0 V, the MC74AC132MELG exhibits a typical hysteresis voltage (V_H) of 1.4 V, calculated as the difference between positive-going (V_t+ = 3.2 V) and negative-going (V_t− = 0.9 V) input thresholds. This value is confirmed in the Input Characteristics table on page 5 of the onsemi datasheet and remains stable across temperature and supply variation.

Can MC74AC132MELG drive a standard LED directly?

Yes, MC74AC132MELG can drive a standard 2 mA–20 mA indicator LED directly. With its guaranteed 24 mA sink/source capability and rail-to-rail output swing, it supports common-anode or common-cathode configurations using a series current-limiting resistor. For a 5 V supply and red LED (V_F ≈ 1.8 V), a 150 Ω resistor yields ~21 mA - well within the MC74AC132MELG's safe operating range.

Is MC74AC132MELG pin-compatible with MC74ACT132 variants?

Yes, MC74AC132MELG is pin-compatible with MC74ACT132 variants (e.g., MC74ACT132DR2G) in the same SOIC-14 package. Both share identical pinout, footprint, and terminal assignments per Figure 1 and ordering information on page 5 of the datasheet. However, their input threshold behavior and drive characteristics differ - verify logic-level compatibility before substitution.

MC74AC132MELG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74AC

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: NAND Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 4 µA

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

Input Logic Level - Low:: 0.5V ~ 1.1V

Input Logic Level - High:: 2.2V ~ 3.9V

Max Propagation Delay @ V, Max CL:: 9ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-14

MC74AC132MELG FAQ

1.How can I place an order for MC74AC132MELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74AC132MELG 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 MC74AC132MELG reliable?

The price and inventory of MC74AC132MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC132MELG is usually 5 days.

3.What payment methods are accepted for MC74AC132MELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC132MELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74AC132MELG?

MC74AC132MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74AC132MELG 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 MC74AC132MELG?

For technical support, including MC74AC132MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC132MELG requirements.

6.How does Aetrix verify that MC74AC132MELG is sourced from the original manufacturer or authorized distributors?

All MC74AC132MELG 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 MC74AC132MELG meets industry standards.

7.What is the process for return or replacement of MC74AC132MELG?

All MC74AC132MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC132MELG, 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 MC74AC132MELG part is unused and in its original packaging.

Return procedure for MC74AC132MELG:

1.Submit a request within 90 days.

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

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