SN74LVT543DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVT543DWR is an octal registered transceiver utilizing Advanced BiCMOS (ABT) technology, designed for 3.3-V VCC operation with TTL interface capability to 5-V systems. It features two sets of D-type latches for temporary data storage in either direction, controlled by separate latch-enable and output-enable inputs. The device supports mixed-mode signal operation and unregulated battery operation down to 2.7 V. It includes active bus-hold circuitry to eliminate external pullup resistors and provides ESD protection exceeding 2000 V per MIL-STD-883C. The component operates within a temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation allowing 5-V input and output voltages during 3.3-V VCC operation
• Contains two sets of D-type latches for temporary storage of data flowing in either direction
• Features active bus-hold data inputs to maintain valid logic levels without external pullup resistors
• Provides independent control of data flow direction via separate latch-enable and output-enable inputs

Buffers, Drivers, Receivers, Transceivers Applications

• Mixed-mode signal environments requiring 5-V system interfacing with 3.3-V components
• Unregulated battery-powered applications operating down to 2.7 V
• Live insertion scenarios requiring robust bus-hold functionality

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant against the datasheet, as the 'DW' suffix denotes the SOIC-24 package. Confirm that the SN74LVT543DW status is NRND (Not Recommended for New Designs) if sourcing for new production, ensuring compatibility with existing designs. Check for RoHS compliance and lead finish details in the latest packaging addendum before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require bidirectional data transfer between 5-V and 3.3-V domains. The ABT technology offers low static power dissipation suitable for battery-operated devices. Ensure the design accommodates the separate control inputs for latch and output enable functions to manage data flow direction effectively.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN54/74LVT543 family of 3.3-V ABT octal registered transceivers. It is functionally similar to other octal transceivers but specifically optimized for 3.3-V operation with 5-V tolerant I/O. The DW package option provides a standard small-outline form factor suitable for surface-mount applications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for SN74LVTH543 variants which offer enhanced performance characteristics. Verify pinout compatibility and electrical specifications against current design requirements before substituting.