74LV540APWJ

Overview

The Nexperia 74LV540APWJ is an octal buffer and line driver featuring inverting logic with three-state outputs. It operates within a supply voltage range of 2.0 V to 5.5 V and supports mixed-mode voltage environments through overvoltage-tolerant inputs. The device incorporates Schmitt-trigger action for improved noise immunity and includes IOFF circuitry to prevent backflow current during partial power-down states. It is housed in a TSSOP-20 package (SOT360-1) and is rated for operation from -40 °C to +125 °C.

Feature Summary

• Octal inverting buffer/line driver with three-state outputs controlled by two independent output enable inputs
• IOFF circuitry enables partial power-down mode, disabling outputs to prevent damaging backflow currents
• Schmitt-trigger inputs provide tolerance for slower input rise and fall times
• Overvoltage tolerant inputs allow safe interfacing in mixed voltage applications

Applications

• Mixed-mode voltage translation between different logic families
• Clock drivers and bus-oriented memory register drives
• Partial power-down system configurations requiring high-impedance isolation

Procurement Notes

Verify the specific suffix 'J' against the manufacturer's official documentation to confirm packaging details such as tape and reel specifications or marking codes. Ensure that the required operating temperature range aligns with the specified -40 °C to +125 °C rating for your application environment before finalizing procurement.

Selection Notes

Select this component when designing systems requiring eight-channel signal inversion with high-impedance control. The wide supply voltage compatibility and overvoltage-tolerant inputs make it suitable for bridging interfaces between devices operating at different voltage levels. Consider the propagation delay characteristics relative to your system clock speeds.

Part Context

This part belongs to the 74LV series of low-voltage CMOS logic devices manufactured by Nexperia. The 74LV540A variant specifically provides octal buffering capabilities. The 'PWJ' designation indicates the TSSOP-20 plastic thin shrink small outline package with specific manufacturing lot or packaging attributes defined by the supplier.

Replacement Considerations

SN74LV540APW (Texas Instruments)

FAQ

How does the IOFF feature function?

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

What is the purpose of the Schmitt-trigger inputs?

Schmitt-trigger action makes the circuit highly tolerant of slower input rise and fall times, improving noise immunity.