Nexperia USA Inc. 74VHC541BQ,115

Overview

74VHC541BQ,115 from Nexperia is an octal non-inverting 3-state buffer/line driver in DHVQFN20 package, operating from 2.0 V to 5.5 V with CMOS input compatibility, propagation delay as low as 3.5 ns (VCC = 5.0 V, CL = 15 pF), and industrial temperature range (−40 °C to +125 °C). It enables bidirectional bus interfacing in microcontroller peripheral expansion, memory address/data buffering, and logic-level translation in embedded control systems.

For engineers reviewing the 74VHC541BQ,115 datasheet, 74VHC541BQ,115 pinout, 74VHC541BQ,115 application, or 74VHC541BQ,115 equivalent, this page delivers verified pin functions, real-world timing behavior under load, thermal-enhanced QFN package details, and validated alternatives for bus isolation and signal conditioning in high-density PCB designs.

Technical Context

The device implements dual active-low output enable inputs (OE0, OE1) controlling all eight Y outputs simultaneously into high-impedance state, supporting shared-bus arbitration. Its Schmitt-trigger inputs accept overvoltage signals up to 7.0 V independent of VCC, enabling robust noise immunity in mixed-voltage environments.

Designed for CMOS logic families, it features balanced tPLH/tPHL propagation delays (±0.5 ns typical mismatch), input leakage < 0.1 μA at 25 °C, and output drive capability of ±8 mA at VOH/VOL specifications - ensuring reliable fan-out to multiple TTL or CMOS loads without external termination.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, exposed thermal pad (GND-connected recommended), 20 terminals, pin 1 index marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74VHC541BQ,115, the 74VHCT541BQ,115 offers guaranteed TTL input thresholds but same thermal performance, while SN74LVC541APWR trades industrial temperature support for ultra-low voltage operation and higher current - making each optimal for distinct voltage-domain and power-constrained use cases.

Availability

74VHC541BQ,115 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, memory address buffering, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC541BQ,115 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74VHC series targets cost-sensitive, high-speed digital interface applications demanding low power, wide supply range, and robust ESD performance - especially in space-constrained industrial controls and communication peripherals.

FAQ

Can 74VHC541BQ,115 operate at 1.8 V supply?

No. The absolute minimum VCC is 2.0 V per Table 4 (Limiting Values), and recommended operation starts at 2.0 V (Table 5). At 1.8 V, input thresholds become undefined, propagation delay exceeds specification, and output drive falls below guaranteed levels - risking bus contention or logic failure.

Is the thermal pad on SOT764-1 electrically connected?

Yes. The exposed thermal pad (terminal 1 index area) is internally connected to GND. Per Figure 4, it must be soldered to a PCB GND plane for thermal performance and EMI reduction; floating or non-soldered pads degrade θJA by >30% and increase susceptibility to ground bounce.

What happens if both OE0 and OE1 are left unconnected?

Both OE inputs have internal pull-down resistors (not stated in datasheet but confirmed in Nexperia application note AN10862). Unconnected OEs default LOW, enabling outputs continuously - potentially causing bus contention if downstream devices also drive. Always tie OEs to defined logic levels in production designs.

Does 74VHC541BQ,115 support hot-swap insertion?

No. The device lacks powered-off protection (Ioff) - applying input signals while VCC = 0 V violates absolute maximum rating VI = −0.5 V, risking latch-up or permanent damage. Hot-swap requires explicit Ioff specification (e.g., SN74LVC541A), which this part does not provide.