SN74LVTH16500DL

Overview

The SN74LVTH16500DL is an 18-bit universal bus transceiver from the Widebus family, designed for low-voltage 3.3-V VCC operation with TTL interface capability to 5-V systems. It supports mixed-mode signal environments and unregulated battery operation down to 2.7 V. The device features a flow-through architecture, active bus-hold circuitry, and Ioff/power-up 3-state support for hot insertion. It operates within a temperature range of -40°C to 85°C in a 56-pin SSOP package.

Feature Summary

• Supports mixed-mode signal operation between 5-V input/output voltages and 3.3-V VCC
• Integrates D-type latches and flip-flops for transparent, latched, or clocked modes
• Includes active bus-hold circuitry to eliminate external pullup/pulldown resistors
• Provides Ioff and power-up 3-state functionality for safe hot-insertion applications

Applications

• Mixed-mode signal interfaces between 5-V and 3.3-V system environments
• Hot-insertion data buses requiring high-impedance states during power transitions
• Unregulated battery-powered equipment operating down to 2.7 V
• High-density memory and storage controller architectures

Procurement Notes

Verify the specific ordering suffix (e.g., DL) matches the required SSOP package configuration. Confirm that the component meets RoHS compliance standards as indicated in the manufacturer's documentation. Ensure the supply voltage requirements align with the recommended operating conditions before integration into the target design.

Selection Notes

Select this component when designing systems requiring 18-bit bidirectional data transfer with integrated storage capabilities. It is suitable for applications needing mixed-voltage compatibility without additional level-shifting logic. Consider the flow-through architecture for optimized PCB layout efficiency and reduced trace lengths in high-speed digital designs.

Part Context

This device belongs to Texas Instruments' Widebus family, combining universal bus transceivers with D-type latches and flip-flops. It enables flexible data handling in transparent, latched, or clocked modes. The LVTH series is engineered for low-voltage operations while maintaining compatibility with legacy 5-V logic levels, bridging older and modern digital system components.

Replacement Considerations

SN74LVTH16500DGGR

FAQ

How does the device handle unused inputs?

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state, eliminating the need for external pullup or pulldown resistors.

What is the function of the Ioff circuitry?

The Ioff circuitry disables outputs when VCC is between 0 and 1.5 V, preventing damaging current backflow through the device during power-down states.