onsemi 74VHC541M

Overview

74VHC541M from Fairchild Semiconductor is an octal buffer/line driver with 3-STATE outputs, designed for memory and address driving, clock distribution, and bus-oriented transmitter/receiver functions. It operates from 2.0V to 5.5V, delivers 3.5 ns typical propagation delay at 5V, supports 3V/5V mixed-supply interfacing, and features flow-through pinout for microprocessor output port use.

For engineers reviewing the 74VHC541M datasheet, pinout, applications, or equivalent options, key selection factors include 3-STATE enable control (OE1/OE2), input voltage tolerance up to 7V independent of VCC, low ICC (4 µA max), high noise immunity (28% VCC min), and SOIC-20 package compatibility with legacy 74HC541 layouts.

Technical Context

The 74VHC541M implements eight non-inverting buffers with dual independent 3-STATE enable inputs (OE1, OE2), allowing grouped output control. Its silicon gate CMOS process enables TTL-compatible speed (3.5 ns tPD typ) while maintaining CMOS-level quiescent current (4 µA max).

Input protection circuitry permits 0V–7V input voltage range regardless of VCC, enabling robust level-shifting between 3V and 5V domains and safe operation in battery-backup dual-supply systems. Outputs drive ±25 mA and tolerate VOUT = 0V to VCC + 0.5V.

Key Specifications

Pinout & Package

74VHC541M is housed in a 20-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-013, 0.300" wide (Package Number M20B), with standard 1.27 mm pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC541D and SN74LVC541APWR, the 74VHC541M uniquely balances 5V-speed performance (3.5 ns), ultra-low static current (4 µA), and universal input voltage tolerance (0–7V), making it the only option supporting robust 3V/5V interface without redesign or external components.

Availability

74VHC541M is available at Aetrix Electronics and suitable for memory subsystems, microprocessor I/O expansion, clock distribution networks, and mixed-voltage interface circuits requiring stable component supply over extended production lifecycles.

Supply support for 74VHC541M 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

Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The 74VHC541M belongs to the VHC (Very High Speed CMOS) family, engineered to deliver bipolar-like speed with CMOS power efficiency-specifically targeting high-density bus buffering, address latching, and clock fanout in space-constrained embedded systems.

FAQ

What is the maximum input voltage rating for the 74VHC541M?

The 74VHC541M supports DC input voltages from 0V to 7.0V, independent of the VCC supply level. This feature enables safe interfacing between higher-voltage peripherals (e.g., 5V sensors) and lower-voltage controllers (e.g., 3.3V FPGAs) without external protection components. The 74VHC541M's input protection circuitry prevents latch-up or damage under mismatched supply conditions, a key advantage over standard HC or AHC families.

Does the 74VHC541M support 3.3V-only operation?

Yes, the 74VHC541M operates reliably across 2.0V to 5.5V VCC, including 3.3V nominal systems. At VCC = 3.3V ± 0.3V, it achieves tPD ≤ 7.0 ns (CL = 15 pF) and maintains VIH ≥ 2.31V (0.7 × VCC), ensuring compatibility with standard 3.3V LVTTL logic thresholds. The 74VHC541M retains full 3-STATE functionality and input tolerance up to 7V even at 3.3V supply.

How does the dual OE structure of the 74VHC541M improve system design?

The 74VHC541M features two independent active-low 3-STATE enable inputs (OE1 on pin 1, OE2 on pin 19), each controlling four outputs (O0–O3 and O4–O7 respectively). This allows segmented bus control-for example, enabling one group for memory access while holding the other in high-impedance during peripheral communication. The 74VHC541M thus supports flexible resource sharing without additional logic or multiplexers.

Is the 74VHC541M pin-compatible with the 74HC541?

Yes, the 74VHC541M is pin- and function-compatible with the 74HC541 in SOIC-20 packaging (M20B), including identical pin assignments for I0–I7, O0–O7, OE1, OE2, VCC, and GND. However, the 74VHC541M offers superior performance: 3.5 ns vs. 15 ns typical propagation delay at 5V, 4 µA vs. 80 µA max ICC, and extended input voltage tolerance (0–7V vs. 0–VCC).

What thermal and environmental conditions apply to the 74VHC541M?

The 74VHC541M is rated for operation from –40°C to +85°C ambient temperature and storage from –65°C to +150°C. Its SOIC-20 package (M20B) supports lead-free reflow per JEDEC J-STD-020B, with peak solder temperature up to 260°C for 10 seconds. These specifications make the 74VHC541M suitable for industrial control, automotive body electronics, and commercial computing applications.