SN74LVCHR16245AKR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVCHR16245AKR is a 16-bit (dual-octal) noninverting bus transceiver designed for asynchronous communication between data buses. It operates from a supply voltage of 1.65 V to 3.6 V and features inputs that accept voltages up to 5.5 V, supporting mixed-mode signal operation in 5-V input/3.3-V VCC environments. The device provides a maximum propagation delay of 4.8 ns at 3.3 V and includes active bus-hold circuitry on data inputs to eliminate the need for external pullup or pulldown resistors.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation with 5-V tolerant inputs while operating at lower supply voltages
• Includes active bus-hold circuitry on data inputs to maintain valid logic levels without external components
• Outputs feature equivalent series resistors to minimize overshoot and undershoot during switching
• Ioff circuitry supports partial power-down mode by disabling outputs to prevent back-drive current

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package suffix 'KR' against the manufacturer's orderable addendum, as standard documentation lists packages such as DGG, DL, ZQL, and ZRD. Confirm the operating temperature range matches the application requirements, noting that some variants are rated for -40°C to 85°C while others extend to 125°C. Ensure the component meets RoHS and Green material specifications required for the target assembly process.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring bidirectional level translation between 1.65-V to 3.6-V buses and 5-V logic domains. The integrated bus-hold feature simplifies PCB layout by removing the need for external termination resistors on floating lines. Consider the 26-Ω internal series resistance for signal integrity management in high-speed applications where external damping resistors are undesirable.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to Texas Instruments' Widebus family of logic ICs. It functions as a 16-bit transceiver that can alternatively be configured as two independent 8-bit transceivers. The architecture allows data transmission from the A bus to the B bus or vice versa, controlled by dedicated direction pins. It is designed for general-purpose asynchronous communication in multi-voltage digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVCHR16245ADL

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle unused or floating data inputs?

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

What is the function of the Ioff circuitry?

The Ioff circuitry disables the outputs when the device is in a partial power-down state. This prevents damaging current from flowing back through the device from powered buses, supporting live insertion applications.

Can this transceiver operate in a mixed 3.3-V and 5-V system?

Yes, the inputs are tolerant to 5.5 V regardless of the VCC supply voltage. This allows the device to interface with 5-V devices while the core operates at 3.3 V or other valid voltages within the 1.65-V to 3.6-V range.