74LVC543ABQ,115

Overview

The 74LVC543ABQ,115 is an octal D-type registered transceiver with 3-state outputs manufactured by Nexperia. It operates within a supply voltage range of 1.2 V to 3.6 V and features 5 V tolerant inputs/outputs for interfacing with 5 V logic. The device contains two sets of D-type latches for temporary storage of data flow in either direction, with separate latch enable and output enable inputs for each register. Propagation delay from An to Bn or Bn to An is typically 3.0 ns at 3.3 V with a 50 pF load.

Feature Summary

• Octal D-type registered transceiver with 3-state non-inverting outputs suitable for bus-oriented applications
• Back-to-back registers provide independent control of data flow direction and storage via separate latch and output enable inputs
• High-impedance state maintained when VCC is 0V, supporting partial power-down modes

Applications

• Bus-oriented data transmission systems requiring registered buffering
• Interfacing between low-voltage logic circuits and 5 V tolerant logic devices
• Temporary data storage and direction-controlled transfer in digital communication architectures

Procurement Notes

Verify the specific ordering suffix matches the DHVQFN24 package configuration required for your design. Confirm that the temperature range specification aligns with your operational environment requirements. Ensure compatibility with your PCB footprint dimensions for the SOT815-1 outline. Cross-reference the latest datasheet revision to confirm any updates to electrical characteristics or pin definitions before finalizing procurement.

Selection Notes

Select this component when bidirectional data transfer with registered storage is necessary. The 5 V tolerance allows direct connection to legacy 5 V systems without level shifting. Consider the propagation delay specifications relative to your system clock speed. Evaluate the power dissipation limits against your thermal management capabilities, particularly regarding derating factors at elevated temperatures.

Part Context

This part belongs to the 74LVC family of high-speed CMOS logic devices. It serves as a registered version of standard unbuffered transceivers, adding storage capability to prevent data corruption during direction changes. The DHVQFN24 package offers a compact solution for space-constrained designs while maintaining thermal performance through an exposed pad.

Replacement Considerations

Check for equivalent parts from other manufacturers offering identical pinouts and electrical characteristics. Verify that alternative components support the same 5 V tolerance and 3-state output functionality. Ensure the replacement package matches the DHVQFN24 form factor if board space is limited.