74LVC541APW/AUJ

Overview

The Nexperia 74LVC541A is an octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and supports overvoltage tolerant inputs up to 5.5 V, enabling direct interfacing with 5 V logic in mixed-voltage environments. The device includes IOFF circuitry for partial power-down applications to prevent backflow current. Inputs utilize Schmitt-trigger action to tolerate slower rise and fall times. It complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36.

Feature Summary

• Features two active-low output enable inputs (OE1 and OE2) that control the high-impedance OFF-state.
• Includes IOFF circuitry to disable outputs during power-down, preventing potentially damaging backflow currents.
• Provides 5 V tolerant inputs and outputs, allowing use as a translator in mixed 3.3 V and 5 V systems.
• Incorporates Schmitt-trigger action at all inputs to ensure tolerance for slow input signal transitions.

Applications

• Partial power-down mode operation
• Mixed 3.3 V and 5 V environment translation
• Direct interface with TTL levels

Procurement Notes

Verify the specific package variant against the ordering information table, such as TSSOP20 (SOT360-1), SO20 (SOT163-1), or DHVQFN20 (SOT764-1). Confirm the temperature range specification matches the application requirements, as the device is specified from -40 °C to +85 °C and -40 °C to +125 °C. Ensure compatibility with the required JEDEC standard version.

Selection Notes

Select this component when an octal buffer with three-state capability is required for bus driving applications. The wide supply voltage range and 5 V tolerance make it suitable for bridging low-voltage logic with 5 V legacy systems. Consider the IOFF feature if the design involves partial power-down states to protect downstream components from reverse current flow.

Part Context

This part belongs to the 74LVC541A family of octal buffers and line drivers manufactured by Nexperia. It is designed as a high-performance, low-power CMOS device compatible with advanced CMOS families. The product data sheet defines its electrical characteristics, pin configurations, and functional behavior for integration into digital logic circuits requiring bus isolation and level shifting.

Replacement Considerations

Public confirmed substitute part numbers include 74LVC541AD and 74LVC541ABQ.

FAQ

How does the device handle partial power-down conditions?

The device utilizes IOFF circuitry which disables the outputs when powered down, preventing potentially damaging backflow current through the device.

What is the function of the OE1 and OE2 pins?

OE1 and OE2 are output enable inputs that are active LOW. A HIGH level on either pin causes the associated outputs to assume a high-impedance OFF-state.