74LVCH16245ADLRG4

Overview

The SN74LVCH16245ADLRG4 is a 16-bit bus transceiver with 3-state outputs from the Texas Instruments Widebus family. It operates on a supply voltage range of 1.65 V to 3.6 V and features inputs tolerant to 5.5 V, supporting mixed-mode signal operation. The device provides a maximum propagation delay of 4 ns at 3.3 V and includes active bus-hold circuitry to maintain valid logic states on unused inputs. It supports partial-power-down mode via Ioff circuitry for live insertion and back-drive protection.

Feature Summary

• Operates across a wide voltage range from 1.65 V to 3.6 V
• Inputs accept voltages up to 5.5 V for mixed-mode compatibility
• Active bus-hold circuitry eliminates the need for external pullup or pulldown resistors
• Ioff feature enables live insertion and back-drive protection

Applications

• Electronic Points of Sale
• Test and Measurement equipment
• Wearable Health and Fitness Devices
• Tablets

Procurement Notes

Verify the specific package type and suffix against the datasheet orderable addendum. Confirm that the RoHS compliance status matches project requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Check for any recent lifecycle changes or obsolescence notices directly from the manufacturer.

Selection Notes

Select this component when asynchronous communication between data buses requires 16-bit width. It is suitable for systems needing down-voltage translation due to its 5.5 V input tolerance. Consider the TSSOP-48 package for surface-mount applications requiring high pin density. Verify power dissipation limits if driving heavy capacitive loads.

Part Context

This part belongs to the SN74LVCH16245A series within the Texas Instruments Widebus family. It is designed specifically for asynchronous communication between data buses in mixed-voltage environments. The device functions as two independent 8-bit transceivers or a single 16-bit unit depending on configuration.

Replacement Considerations

SN74LVCH16245ADGGRG4

FAQ

How does the device handle unused inputs?

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

What is the purpose of the Ioff feature?

The Ioff circuitry disables the outputs during partial-power-down applications, preventing damaging current backflow through the device when it is powered down.