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

onsemi MC74HCT541ADW

Name: MC74HCT541ADW
Brand: onsemi
SKU: MC74HCT541ADW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74HCT541ADW

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: MC74HCT541ADW.pdf

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

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Product details

Overview

MC74HCT541ADW from onsemi is an octal non-inverting 3-state buffer/line driver in SOIC-20 package, featuring 2V–6V supply operation, TTL-compatible inputs, and ±4mA output drive at V_CC = 4.5V. It supports bidirectional bus interfacing in industrial control and microprocessor peripheral expansion.

For engineers reviewing the MC74HCT541ADW datasheet, pinout, applications, or equivalent options, key selection criteria include input threshold compatibility with 5V TTL logic, guaranteed 3-state isolation leakage (< 1µA), propagation delay (t_PD = 18ns max at V_CC = 4.5V), and SOIC-20 thermal performance under sustained bus loading.

Technical Context

This device implements eight independent non-inverting buffers, each with separate 3-state enable control (1OE, 2OE) for dual 4-bit group management. Input thresholds are fixed at V_IL ≤ 0.8V and V_IH ≥ 2.0V across full V_CC range (2.0V–6.0V), ensuring robust TTL-level signal recognition.

Output stages use standard CMOS push-pull topology with symmetrical sourcing/sinking capability and guaranteed high-impedance state off-leakage of ≤ 1µA at V_CC = 6V and T_A = 25°C. Propagation delays are characterized at both rising and falling edges with matched t_PLH/t_PHL ≤ 18ns (V_CC = 4.5V, C_L = 50pF).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.0V to 6.0V - Enables direct interface with mixed-voltage systems including 3.3V and 5V logic domains.
Input Thresholds	V_IL ≤ 0.8V, V_IH ≥ 2.0V - Guarantees reliable recognition of standard TTL logic levels across full V_CC range.
Output Drive	±4mA at V_CC = 4.5V - Sufficient to drive 10 LSTTL loads or terminate 50Ω transmission lines without external buffering.
Propagation Delay	t_PD ≤ 18ns (V_CC = 4.5V, C_L = 50pF) - Supports 25MHz bus clocking with timing margin for setup/hold compliance.
3-State Leakage	I_OZ ≤ 1µA (V_CC = 6V, T_A = 25°C) - Prevents signal contention and crosstalk during bus arbitration.
Operating Temperature	−40°C to +85°C - Qualified for industrial-grade embedded control and instrumentation environments.

Pinout & Package

MC74HCT541ADW is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and 1.27mm lead pitch. The package meets JEDEC MS-013AC standards and supports reflow soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	Output Enable (1OE, 2OE)	Active-low enables respective 4-bit buffer groups; tied high disables outputs into high-Z state.
2–5, 11–14	Data Inputs (1A1–1A4, 2A1–2A4)	Non-inverting logic inputs accepting TTL-compatible voltage thresholds.
6–9, 15–18	Data Outputs (1Y1–1Y4, 2Y1–2Y4)	CMOS push-pull outputs with symmetrical sourcing/sinking and defined 3-state behavior.
10	GND	Ground reference for all internal circuitry and I/O structures.
20	V_CC	Positive supply rail supporting 2.0V–6.0V operation with bypass capacitor requirement.

Key Features

Feature	Design Value
TTL-Compatible Inputs	Fixed V_IL/V_IH thresholds ensure interoperability with legacy 5V TTL buses without level-shifting.
Dual Independent Output Enables	Separate 1OE and 2OE pins allow selective activation of two 4-bit data lanes for flexible bus partitioning.
High-Noise-Immunity Outputs	Guaranteed 3-state off-leakage < 1µA prevents false triggering in shared-bus systems with multiple drivers.
Wide Supply Range	2.0V–6.0V operation supports migration from 5V to 3.3V systems while retaining pinout and logic behavior.

Applications

Industrial PLC I/O Expansion	Microcontroller Peripheral Interface
Use Scenario: Adding parallel digital I/O capability to programmable logic controllers using isolated 24V field-side signals converted to 5V logic levels. IC Role / Device Role / Timing Role: Level-translating buffer isolating MCU-side 5V logic from optocoupler-driven field inputs/outputs. Use Value: Enables direct connection to TTL-compatible address/data buses while maintaining noise immunity and bus contention protection via controlled 3-state outputs.	Use Scenario: Interfacing an 8-bit microcontroller port to external memory-mapped peripherals such as ADCs, DACs, or LCD controllers. IC Role / Device Role / Timing Role: Bidirectional bus driver managing data flow direction and enabling/disabling peripheral access on shared address/data lines. Use Value: Provides deterministic 18ns propagation delay and ±4mA drive strength sufficient to meet setup/hold timing for 25MHz memory read/write cycles.
Legacy System Bus Buffering	Test Equipment Signal Conditioning
Use Scenario: Upgrading aging test fixtures with modern 3.3V controllers while preserving compatibility with existing 5V backplane logic. IC Role / Device Role / Timing Role: Voltage-tolerant buffer bridging mixed-supply domains without external level shifters or pull-up resistors. Use Value: Eliminates need for discrete resistor networks or dedicated level translators by supporting 2V–6V V_CC and TTL input thresholds.	Use Scenario: Driving calibrated analog multiplexer control lines and digital trigger inputs in automated test equipment with strict timing jitter requirements. IC Role / Device Role / Timing Role: Low-skew, low-leakage buffer ensuring precise edge alignment and zero DC loading on sensitive analog control nodes. Use Value: Delivers matched t_PLH/t_PHL ≤ 18ns and sub-µA off-state leakage critical for repeatable switching accuracy in precision measurement systems.

Industrial PLC I/O Expansion

Microcontroller Peripheral Interface

Use Scenario: Adding parallel digital I/O capability to programmable logic controllers using isolated 24V field-side signals converted to 5V logic levels.

IC Role / Device Role / Timing Role: Level-translating buffer isolating MCU-side 5V logic from optocoupler-driven field inputs/outputs.

Use Value: Enables direct connection to TTL-compatible address/data buses while maintaining noise immunity and bus contention protection via controlled 3-state outputs.

Use Scenario: Interfacing an 8-bit microcontroller port to external memory-mapped peripherals such as ADCs, DACs, or LCD controllers.

IC Role / Device Role / Timing Role: Bidirectional bus driver managing data flow direction and enabling/disabling peripheral access on shared address/data lines.

Use Value: Provides deterministic 18ns propagation delay and ±4mA drive strength sufficient to meet setup/hold timing for 25MHz memory read/write cycles.

Legacy System Bus Buffering

Test Equipment Signal Conditioning

Use Scenario: Upgrading aging test fixtures with modern 3.3V controllers while preserving compatibility with existing 5V backplane logic.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer bridging mixed-supply domains without external level shifters or pull-up resistors.

Use Value: Eliminates need for discrete resistor networks or dedicated level translators by supporting 2V–6V V_CC and TTL input thresholds.

Use Scenario: Driving calibrated analog multiplexer control lines and digital trigger inputs in automated test equipment with strict timing jitter requirements.

IC Role / Device Role / Timing Role: Low-skew, low-leakage buffer ensuring precise edge alignment and zero DC loading on sensitive analog control nodes.

Use Value: Delivers matched t_PLH/t_PHL ≤ 18ns and sub-µA off-state leakage critical for repeatable switching accuracy in precision measurement systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal non-inverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT541DWR	Same logic function and pinout; TI version with identical V_CC range and output drive but tighter t_PD spec (15ns max).	Preferred where lower propagation delay is required for higher-speed bus timing margins.	Select SN74HCT541DWR when system timing budget demands <18ns delay; verify layout compatibility with TI's SOIC-20 footprint variant.
74HCT541PW,118	NXP version in TSSOP-20 package; same electrical specs but smaller footprint (4.4mm × 6.5mm vs SOIC-20's 7.5mm × 12.8mm).	Suitable for space-constrained PCB layouts where board area optimization is prioritized over thermal mass.	Choose 74HCT541PW,118 for compact designs requiring same functionality in reduced package size; confirm reflow profile compatibility with TSSOP.

Compared with MC74HCT541ADW, SN74HCT541DWR offers marginally faster timing for speed-critical interfaces, while 74HCT541PW,118 provides identical logic performance in a 40% smaller footprint-enabling trade-offs between timing headroom and board space efficiency.

Availability

MC74HCT541ADW is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MC74HCT541ADW 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 MC74HCT541ADW belongs to onsemi's HCT logic family designed specifically for TTL-to-CMOS interfacing in industrial and embedded systems requiring wide supply tolerance and robust noise immunity.

FAQ

What is the maximum operating frequency supported by the MC74HCT541ADW?

The MC74HCT541ADW does not specify a maximum clock frequency in its datasheet because it is a combinational logic buffer-not a clocked device. However, based on its typical propagation delay of 13ns and maximum of 18ns (at V_CC = 4.5V, C_L = 50pF), the MC74HCT541ADW supports reliable data transfer up to approximately 25MHz in synchronous bus applications with adequate setup/hold margins.

Does the MC74HCT541ADW support 3.3V-only operation?

Yes, the MC74HCT541ADW supports 3.3V-only operation across its full specified supply range of 2.0V to 6.0V. Its TTL-compatible input thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.0V) ensure correct logic interpretation of 3.3V CMOS outputs, making the MC74HCT541ADW suitable for mixed-voltage systems without external level shifting.

How is output enable controlled on the MC74HCT541ADW?

The MC74HCT541ADW features two active-low output enable inputs: 1OE (pin 1) controls Y1–Y4, and 2OE (pin 19) controls Y11–Y14. When either enable is high, its corresponding four outputs enter high-impedance state. Both enables must be low for full 8-bit output activation. This dual-enable architecture allows independent gating of two 4-bit data lanes in the MC74HCT541ADW.

What is the recommended bypass capacitor for the MC74HCT541ADW?

A 0.1µF ceramic capacitor placed as close as possible to the V_CC (pin 20) and GND (pin 10) pins is the standard recommendation for the MC74HCT541ADW. This minimizes high-frequency supply noise and ensures stable switching performance, especially under dynamic bus loading conditions where simultaneous output transitions occur.

Is the MC74HCT541ADW RoHS compliant and halogen-free?

Yes, the MC74HCT541ADW is RoHS compliant and halogen-free per onsemi's official product documentation. It meets EU Directive 2011/65/EU and satisfies IPC-4101 definition for halogen-free materials (Cl ≤ 900 ppm, Br ≤ 900 ppm), confirming environmental compliance for the MC74HCT541ADW in industrial and commercial deployments.

MC74HCT541ADW Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HCT

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

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:: 6mA, 6mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

MC74HCT541ADW FAQ

1.How can I place an order for MC74HCT541ADW through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74HCT541ADW 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 MC74HCT541ADW reliable?

The price and inventory of MC74HCT541ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HCT541ADW is usually 5 days.

3.What payment methods are accepted for MC74HCT541ADW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HCT541ADW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74HCT541ADW?

MC74HCT541ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74HCT541ADW 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 MC74HCT541ADW?

For technical support, including MC74HCT541ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HCT541ADW requirements.

6.How does Aetrix verify that MC74HCT541ADW is sourced from the original manufacturer or authorized distributors?

All MC74HCT541ADW 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 MC74HCT541ADW meets industry standards.

7.What is the process for return or replacement of MC74HCT541ADW?

All MC74HCT541ADW units undergo pre-shipment inspection (PSI). If there is an issue with MC74HCT541ADW, 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 MC74HCT541ADW part is unused and in its original packaging.

Return procedure for MC74HCT541ADW:

1.Submit a request within 90 days.

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

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