74LVCHR16245AGRDR

Overview

The SN74LVCHR16245A is a 16-bit (dual-octal) noninverting bus transceiver designed for 1.65-V to 3.6-V VCC operation. It supports asynchronous communication between data buses with inputs accepting voltages up to 5.5 V. The device features a maximum propagation delay of 4.8 ns at 3.3 V and typical output ground bounce of 2 V. Outputs include equivalent 26-Ω series resistors, and the Ioff circuitry supports live insertion and partial power-down modes.

Feature Summary

• Supports mixed-mode signal operation on asynchronous communication buses
• Active bus-hold circuitry eliminates the need for external pullup or pulldown resistors
• Outputs feature integrated series resistors to minimize overshoot and undershoot
• Ioff circuitry prevents damaging current backflow during partial power-down

Applications

• Telecom infrastructures
• Industrial transport systems
• Wireless infrastructures
• Servers
• Tests and measurements equipment

Procurement Notes

Verify the specific package type required for the design, as the SN74LVCHR16245A family includes SSOP, TSSOP, TVSOP, and BGA options. Confirm that the selected variant meets the thermal requirements for the intended operating temperature range. Ensure compatibility with the system's voltage levels and check for any specific ordering suffixes that may affect availability or packaging quantity.

Selection Notes

Select this component when interfacing 1.65-V to 3.6-V buses with 5-V tolerant logic without requiring external level shifters. The dual-octal architecture allows configuration as two independent 8-bit transceivers or one 16-bit unit. Consider the 26-Ω internal series resistance for signal integrity in high-speed applications where external damping resistors are undesirable.

Part Context

This device belongs to Texas Instruments' Widebus Family of logic components. It is part of the LVCHR series, which combines low-voltage CMOS technology with high drive capability and robust input protection. The SN74LVCHR16245A provides a bidirectional solution for data transfer between different bus domains within mixed-voltage electronic systems.

Replacement Considerations

SN74LVCHR16245ADL

FAQ

How does the device handle unused or floating data inputs?

The SN74LVCHR16245A includes active bus-hold circuitry on all data inputs. This feature holds unused or floating inputs at a valid logic level, eliminating the need for external pullup or pulldown resistors.

Can this transceiver be used for voltage translation between 3.3-V and 5-V systems?

Yes, the inputs accept voltages up to 5.5 V while the device operates from 1.65 V to 3.6 V. This allows it to function as a translator in mixed 3.3-V/5-V system environments.