74LVT16543ADGG,112

Overview

The Nexperia 74LVT16543ADGG,112 is a 3.3 V 16-bit registered transceiver with 3-state outputs housed in a TSSOP56 (SOT364-1) package. It operates within a supply voltage range of 2.7 V to 3.6 V and supports overvoltage tolerant inputs up to 5.5 V. The device features BiCMOS technology providing an output capability of +64 mA/-32 mA. At 3.3 V, the propagation delay ranges from 1.0 ns to 3.7 ns for data paths and 1.5 ns to 4.8 ns for latch enable paths.

Feature Summary

• Integrated bus-hold data inputs eliminate the need for external pull-up resistors to define unused inputs.
• IOFF circuitry provides partial power-down mode operation by disabling outputs to prevent damaging backflow currents.
• Power-up reset and power-up 3-state functionality ensure defined states during initialization.
• Live insertion and extraction are permitted without causing bus current loading when tied to a 5 V bus.

Applications

• Mixed 3.3 V and 5 V system interfaces
• High-speed buffered memory and register-to-register transfers
• Parallel I/O expansion

Procurement Notes

Verify the specific ordering suffix matches the required tape-and-reel packaging configuration. Confirm that the component meets RoHS compliance standards and verify the manufacturing date code against project requirements. Ensure the TSSOP56 footprint aligns with the intended PCB layout before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high drive strength and registered data transfer between 3.3 V logic systems and 5 V tolerant buses. The integrated bus-hold feature simplifies design by removing external pull-up components. Verify that the operating temperature range of -40 °C to +85 °C satisfies the environmental constraints of the target application.

Part Context

This part belongs to the 74LVT series of low-voltage TTL-compatible logic devices manufactured by Nexperia. It functions as a universal bus interface capable of being configured as two 8-bit transceivers or one 16-bit transceiver. The registered nature of the device allows for precise timing control in synchronous digital designs.

Replacement Considerations

Check for direct pin-compatible alternatives within the same LVT family. Verify that any substitute maintains the 16-bit width, registered output capability, and identical TSSOP56 package dimensions to ensure mechanical fit.

FAQ

How does the device handle unused inputs?

The device includes bus-hold data inputs which automatically hold unused inputs at a valid logic level, eliminating the need for external pull-up resistors.

What is the function of the IOFF circuitry?

The IOFF circuitry enables partial power-down mode operation. It disables the outputs to prevent potentially damaging backflow currents through the device when it is powered down while other parts of the system remain active.