SN74AXCH8T245PWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AXCH8T245PWR is an 8-bit dual-supply bus transceiver from Texas Instruments featuring configurable voltage translation, tri-state outputs, and bus-hold circuitry. It operates with independent power rails (VCCA and VCCB) ranging from 0.65 V to 3.6 V. The device supports data rates up to 380 Mbps when both supplies are at least 1.8 V. It includes partial power-down capabilities via Ioff circuitry to prevent backflow current during power loss. The component is housed in a 24-pin TSSOP package and functions as a non-inverting transceiver for asynchronous communication between buses.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Configurable voltage translation allows operation across varying supply nodes from 0.65 V to 3.6 V on both ports.
• Integrated bus-hold circuitry maintains stable logic levels on floating lines without external pull-up or pull-down resistors.
• Partial power-down mode utilizes Ioff circuitry to disable outputs and prevent damaging backflow current when the device is unpowered.
• Dual-direction control inputs enable synchronous data transfer between A and B buses while maintaining high-impedance isolation.

Buffers, Drivers, Receivers, Transceivers Applications

• Enterprise and communication systems requiring level shifting between different voltage domains
• Industrial automation equipment interfacing low-voltage controllers with standard voltage peripherals
• Personal electronics and wireless infrastructure connecting diverse logic families

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'PWR' corresponds to the 24-TSSOP package and tape-and-reel shipping configuration. Confirm that the 'H' variant designation indicates the inclusion of bus-hold circuitry, which distinguishes it from the standard SN74AXC8T245 series. Ensure compatibility with your board's thermal requirements for surface-mount installation within the specified operating temperature range.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when simultaneous voltage translation and signal integrity maintenance on floating buses are required. The integrated bus-hold feature simplifies design by eliminating external components typically needed for pull-ups. Choose this over the standard AXC8T245 if the application involves buses that may remain unconnected or require defined states during inactive periods. Verify that the 380 Mbps speed rating meets the system's maximum data throughput requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74AX family of advanced CMOS logic devices designed for high-speed applications. It serves as an evolution of the SN74AVC8T245, adding bus-hold functionality to enhance signal stability. The device addresses the need for flexible voltage domain interfacing in modern mixed-signal systems where multiple power rails coexist.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74AXC8T245PWR is a compatible substitute but lacks the bus-hold circuitry found in the H variant. The SN74AVC8T245PWRE4 is an older generation alternative with similar voltage translation capabilities but lower performance specifications and no bus-hold feature. Verify pinout compatibility before swapping these parts.