SN74AVCH8T245PWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AVCH8T245PWR is an 8-bit dual-supply bus transceiver from Texas Instruments, designed for low-voltage bidirectional voltage translation. It operates with VCCA and VCCB ranging from 1.2V to 3.6V, supporting asynchronous communication between different voltage nodes. The device features configurable voltage translation, 3-state outputs, and a propagation delay of 2.5 ns. It supports data rates up to 320 Mbps when both supplies are at least 1.8V. Packaged in a 24-pin TSSOP, it functions within a temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Configurable dual-rail design allows independent power supply tracking for A and B ports, enabling universal low-voltage bidirectional conversion across various voltage nodes.
• I/O ports tolerate voltages up to 4.6V, providing robust protection against voltage surges and ensuring compatibility with diverse circuit environments.
• Supports partial power-down mode via Ioff, allowing the device to enter a high-impedance state during power-up or power-down sequences to prevent current backflow.

Buffers, Drivers, Receivers, Transceivers Applications

• Connecting sensors, Bluetooth modules, and memory chips in smartphones and tablets
• Voltage adaptation between PLCs, sensors, and control modules in industrial automation
• Data interaction coordination in IoT gateways and smart home controllers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'PWR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the operating temperature range of -40°C to +85°C meets the environmental specifications of the target application. Ensure that the 4.6V I/O tolerance aligns with the voltage levels present on the connected buses to prevent damage.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing logic families requiring asymmetric voltage levels, such as 1.2V to 3.3V conversions. It is suitable for designs needing high-speed data transfer with minimal skew. Consider the 24-pin TSSOP package constraints regarding PCB space. Verify that the DIR and OE control inputs are compatible with the VCCA reference voltage levels used in the system design.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74AVCH8T245 series of CMOS bus transceivers. It is engineered to facilitate asynchronous data transmission between buses operating at different voltage potentials. The device integrates direction control and output enable functions, offering flexibility in bus management while maintaining signal integrity across varying supply conditions.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AVC8T245PWR is a manufacturer-recommended alternative within the same family, lacking the H (high-drive/isolation) specific enhancements but sharing core functionality.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle partial power-down scenarios?

The SN74AVCH8T245PWR supports Ioff circuits, which automatically place the outputs in a high-impedance state when the respective supply voltage drops below a threshold, preventing backfeeding into the disabled power rail.

What is the maximum data rate supported by this transceiver?

The device supports a maximum data rate of 320 Mbps when both VCCA and VCCB are greater than or equal to 1.8V. If either supply is below 1.8V, the rate is limited to 170 Mbps.