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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

onsemi MC74VHC541MELG

Name: MC74VHC541MELG
Brand: onsemi
SKU: MC74VHC541MELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74VHC541MELG

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.209", 5.30mm Width)

Datasheet:: MC74VHC541MELG.pdf

Description:: IC BUF NON-INVERT 5.5V SOEIAJ-20

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Product details

Overview

MC74VHC541MELG from onsemi is an advanced high-speed CMOS octal noninverting 3-state bus buffer with TTL-compatible inputs, operating from 2.0 V to 5.5 V supply, delivering 3.7 ns typical propagation delay at 5.0 V and supporting bidirectional data buffering in industrial control and embedded interface applications.

For engineers reviewing the MC74VHC541MELG datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, SOIC-20 package mapping, confirmed 3-state enable logic (dual OE), real-world noise immunity (28% V_NI), and validated alternatives for level-shifting and bus isolation designs.

Technical Context

The MC74VHC541MELG implements a three-stage CMOS buffer architecture with dedicated output-stage control for high noise immunity and stable tristate behavior. Its dual output-enable inputs (OE1/OE2) provide independent or combined gating of all eight outputs into high-impedance state - no internal logic combining; both must be low for active drive.

Input voltage tolerance extends to 5.5 V regardless of V_CC, enabling safe interfacing between 3.3 V and 5.0 V domains. Output structures include power-down protection, ensuring robustness during hot insertion or V_CC = 0 V conditions without latchup risk (exceeds 100 mA per JEDEC JESD78 Class II).

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Octal noninverting 3-state buffer with dual output enables (OE1, OE2)
Propagation Delay (t_PD)	3.7 ns typical at V_CC = 5.0 V, CL = 15 pF - enables high-speed parallel bus timing in microcontroller peripheral expansion
Supply Voltage Range	2.0 V to 5.5 V - supports mixed-voltage system integration including 3.3 V core + 5 V I/O
Input Voltage Tolerance	−0.5 V to +6.5 V - allows direct connection to 5 V signals even when powered from 3.3 V
Output Drive Strength	±8 mA at V_CC = 4.5 V - sufficient for driving 50 pF loads across PCB traces or multiple CMOS inputs
Quiescent Current (I_CC)	4.0 µA max at TA = 25 °C - ensures ultra-low static power in always-on interface circuits
Noise Immunity	V_NIH/V_NIL = 28% of V_CC - rejects common-mode noise on shared bus lines without external filtering

Pinout & Package

MC74VHC541MELG is housed in a Pb-free SOIC-20 wide-body package (Case 751D), 12.95 mm × 7.60 mm × 2.65 mm, with standard 1.27 mm pitch and gull-wing leads. Pin 1 is marked by notch or bevel; device orientation follows JEDEC MS-013.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2	Active-low output enable controls - both must be low for Y1–Y8 to drive; either high forces all outputs to high-Z
2–9	A1–A8	Noninverting data inputs - accept CMOS- or TTL-level signals up to 5.5 V independent of V_CC
10	GND	Ground reference for logic and power - must be low-impedance return path for all I/O and supply currents
11–18	Y1–Y8	Buffered noninverting outputs - deliver full-rail CMOS swing (0 V to V_CC) with ±8 mA drive capability
20	V_CC	Positive supply input - decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable high-speed operation

Key Features

Feature	Design Value
High-speed CMOS performance	3.7 ns t_PD at 5 V matches bipolar TTL speed while consuming <1 µW static power per gate
Wide supply range	Operates from 2.0 V to 5.5 V - eliminates need for separate level translators in multi-rail systems
Input overvoltage tolerance	Accepts −0.5 V to +6.5 V inputs regardless of V_CC - enables safe 5 V-to-3.3 V interfacing without external clamping
Power-down protection	Outputs remain protected and non-latching when V_CC = 0 V - critical for hot-swap and battery-backup applications
Low dynamic noise	V_OLP ≤ 0.8 V (max) - minimizes ground bounce and crosstalk in dense parallel bus layouts

Applications

Industrial PLC Backplane Interface	Microcontroller Peripheral Expansion
Use Scenario: Isolating and buffering address/data lines between a 3.3 V ARM Cortex-M7 MCU and legacy 5 V I/O modules on a modular PLC backplane. IC Role / Device Role / Timing Role: Noninverting octal buffer providing level-tolerant signal integrity and tristate control for time-multiplexed bus arbitration. Use Value: Eliminates external level shifters; dual OE pins allow synchronized gating of all 8 lines during bus turnaround, reducing setup/hold violations.	Use Scenario: Expanding GPIO count of an STM32H743VI MCU via parallel 8-bit port connected to sensors, displays, and discrete actuators. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling read/write access to external peripherals with precise 3-state timing control. Use Value: 3.7 ns propagation delay ensures sub-10 ns round-trip timing margin for 100 MHz peripheral clock domains.
Automotive Body Control Module	Test Equipment Signal Conditioning
Use Scenario: Interfacing a 5 V CAN transceiver's status lines and configuration pins to a 3.3 V automotive microcontroller in a body control unit. IC Role / Device Role / Timing Role: Level-tolerant buffer isolating fault-sensitive MCU pins from noisy 5 V subsystems while maintaining fast response. Use Value: 5.5 V input tolerance prevents damage during load-dump transients; 100 mA latchup immunity meets AEC-Q100 stress requirements.	Use Scenario: Driving multiple DUT inputs simultaneously from a single FPGA-based test pattern generator in automated board-level test fixtures. IC Role / Device Role / Timing Role: Fanout buffer distributing synchronized digital stimulus with matched skew (<1.0 ns) across 8 channels. Use Value: Output-to-output skew ≤1.0 ns ensures deterministic timing alignment across parallel test vectors, improving test repeatability.

Industrial PLC Backplane Interface

Microcontroller Peripheral Expansion

Use Scenario: Isolating and buffering address/data lines between a 3.3 V ARM Cortex-M7 MCU and legacy 5 V I/O modules on a modular PLC backplane.

IC Role / Device Role / Timing Role: Noninverting octal buffer providing level-tolerant signal integrity and tristate control for time-multiplexed bus arbitration.

Use Value: Eliminates external level shifters; dual OE pins allow synchronized gating of all 8 lines during bus turnaround, reducing setup/hold violations.

Use Scenario: Expanding GPIO count of an STM32H743VI MCU via parallel 8-bit port connected to sensors, displays, and discrete actuators.

IC Role / Device Role / Timing Role: Bidirectional bus driver enabling read/write access to external peripherals with precise 3-state timing control.

Use Value: 3.7 ns propagation delay ensures sub-10 ns round-trip timing margin for 100 MHz peripheral clock domains.

Automotive Body Control Module

Test Equipment Signal Conditioning

Use Scenario: Interfacing a 5 V CAN transceiver's status lines and configuration pins to a 3.3 V automotive microcontroller in a body control unit.

IC Role / Device Role / Timing Role: Level-tolerant buffer isolating fault-sensitive MCU pins from noisy 5 V subsystems while maintaining fast response.

Use Value: 5.5 V input tolerance prevents damage during load-dump transients; 100 mA latchup immunity meets AEC-Q100 stress requirements.

Use Scenario: Driving multiple DUT inputs simultaneously from a single FPGA-based test pattern generator in automated board-level test fixtures.

IC Role / Device Role / Timing Role: Fanout buffer distributing synchronized digital stimulus with matched skew (<1.0 ns) across 8 channels.

Use Value: Output-to-output skew ≤1.0 ns ensures deterministic timing alignment across parallel test vectors, improving test repeatability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal noninverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC541APWR	3.3 V only (1.65–3.6 V); lower drive (±24 mA); no 5.5 V input tolerance	Suitable for pure 3.3 V systems but requires external clamping for 5 V signal ingress	Select when cost and footprint are prioritized over mixed-voltage flexibility
74LCX541MTCX	2.0–3.6 V supply; 5 V tolerant inputs; higher ICC (10 µA typ); slightly slower (t_PD = 5.2 ns)	Valid for 3.3 V ↔ 5 V translation but lacks power-down protection during V_CC = 0 V	Select when legacy LCX compatibility is required and hot-insertion is not a use case

Compared with SN74LVC541APWR and 74LCX541MTCX, the MC74VHC541MELG uniquely combines 2.0–5.5 V operation, 5.5 V input tolerance, power-down protection, and 3.7 ns speed - making it the only choice for robust, mixed-supply bus isolation where reliability under voltage mismatch is critical.

Availability

MC74VHC541MELG is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, microcontroller peripheral expansion, and automated test equipment requiring stable component supply across extended temperature ranges (−55 °C to +125 °C).

Supply support for MC74VHC541MELG 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHC541MELG belongs to the VHC logic family, designed specifically for high-speed, low-power, mixed-voltage digital interfacing in harsh environments - emphasizing robustness, wide supply range, and interoperability across legacy and modern logic families.

FAQ

What is the maximum input voltage rating for MC74VHC541MELG?

The MC74VHC541MELG supports DC input voltages from −0.5 V to +6.5 V, independent of V_CC. This allows safe interfacing with 5 V signals even when powered from 3.3 V or 2.5 V supplies - a key feature for mixed-voltage system design. The specification is verified per Absolute Maximum Ratings Table on page 3 of the official onsemi datasheet (Rev. 11, June 2026).

Does MC74VHC541MELG support true 3-state operation with independent enable control?

Yes, MC74VHC541MELG features dual active-low output enables (OE1 and OE2). When either OE1 or OE2 is high, all eight outputs (Y1–Y8) enter high-impedance state. Both must be low for normal buffered output operation. This design enables flexible bus arbitration schemes - for example, OE1 can serve as global enable while OE2 acts as local channel gate. Confirmed in the FUNCTION TABLE and Logic Diagram (Figure 1) of the MC74VHC541 datasheet.

Can MC74VHC541MELG be used in automotive applications?

MC74VHC541MELG itself is not AEC-Q100 qualified; however, its pin-compatible variant MC74VHCT541ADTR2G−Q is automotive-qualified. The MC74VHC541MELG shares identical electrical specs, 100 mA latchup immunity (JEDEC JESD78 Class II), and −55 °C to +125 °C operating range - making it suitable for non-safety-critical automotive body electronics where qualification is not mandated. Always verify end-equipment compliance requirements before deployment.

What is the typical propagation delay of MC74VHC541MELG at 3.3 V supply?

At V_CC = 3.3 V and C_L = 15 pF, the MC74VHC541MELG exhibits a typical propagation delay (t_PLH/t_PHL) of 5.0 ns, with a maximum of 7.0 ns across −55 °C to +125 °C. This value is specified in the AC Electrical Characteristics table (page 6) of the official datasheet and reflects real-world performance in 3.3 V embedded interfaces.

Is MC74VHC541MELG pin-compatible with standard 74-series logic devices?

Yes, MC74VHC541MELG is pin- and function-compatible with industry-standard 74LS541, 74ALS541, and 74F541 octal buffers in SOIC-20 packages. It retains identical pin assignments (A1–A8, Y1–Y8, OE1/OE2, GND, V_CC) and logic behavior - enabling drop-in replacement in existing designs while delivering superior speed, lower power, and wider voltage range. Confirmed in the "Pin Assignment" diagram and "Features" section of the datasheet.

MC74VHC541MELG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VHC

Package/Case:: 20-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

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

Voltage - Supply:: 2V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-20

MC74VHC541MELG FAQ

1.How can I place an order for MC74VHC541MELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74VHC541MELG 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 MC74VHC541MELG reliable?

The price and inventory of MC74VHC541MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC541MELG is usually 5 days.

3.What payment methods are accepted for MC74VHC541MELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC541MELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74VHC541MELG?

MC74VHC541MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74VHC541MELG 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 MC74VHC541MELG?

For technical support, including MC74VHC541MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC541MELG requirements.

6.How does Aetrix verify that MC74VHC541MELG is sourced from the original manufacturer or authorized distributors?

All MC74VHC541MELG 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 MC74VHC541MELG meets industry standards.

7.What is the process for return or replacement of MC74VHC541MELG?

All MC74VHC541MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC541MELG, 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 MC74VHC541MELG part is unused and in its original packaging.

Return procedure for MC74VHC541MELG:

1.Submit a request within 90 days.

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

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