TPT29546A-TS3R

Specialized Overview

The TPT29546A is a 1:4 bidirectional translating I2C switch manufactured by 3PEAK. It fans out one upstream SCL/SDA pair to four downstream channels, allowing any single or combination of channels to be selected via a programmable control register. The device supports Standard Mode and Fast Mode I2C devices with clock frequencies from 0 to 400 kHz. Operating power-supply voltage ranges from 2.3 V to 5.5 V, enabling voltage-level translation among 2.5-V, 3.3-V, and 5-V buses. All I/O terminals are 5.5 V tolerant. An active-low reset input helps recover from stuck-low bus states. ESD protection exceeds ±4000 V HBM and ±1500 V CDM. Latch-up performance exceeds 200 mA per JESD 78. It operates from -40°C to +85°C and is available in TSSOP16 and SOP16 packages.

Specialized Feature Summary

• Bidirectional translation between different I2C bus voltage levels without additional protection components
• Active-low reset input for recovering from stuck-low bus conditions
• Supports hot insertion into live I2C buses
• Three address terminals allow up to eight devices on the same I2C bus

Specialized Applications

• Servers and storage systems
• Telecom switching equipment and routers
• Factory automation systems
• Products with I2C slave address conflicts

Specialized Procurement Notes

Verify the specific package type required for your design, as the TPT29546A is offered in both TSSOP16 (suffix TS) and SOP16 (suffix SO). Confirm that the operating temperature range of -40°C to +85°C meets your system requirements. Ensure your I2C master can handle the device's addressing scheme using the three hardware address pins. Check that the supply voltage remains within the 2.3 V to 5.5 V range during all operational states.

Specialized Selection Notes

Select the TPT29546A when you need to expand an I2C bus to four distinct channels while managing voltage level differences between 2.5 V, 3.3 V, and 5 V domains. It is suitable for resolving slave address conflicts by utilizing multiple address bits. Consider this component if your design requires low standby current and robust ESD protection exceeding standard industrial levels. Verify that the maximum bus capacitance limits are not exceeded when enabling multiple channels simultaneously.

Specialized Part Context

The TPT29546A belongs to 3PEAK's family of I2C interface solutions, which includes switches, translators, and IO expanders. It complements other products like the TPT29548L and TPT29606 by providing multi-channel switching capabilities rather than simple point-to-point translation. This component addresses the need for bus isolation and voltage compatibility in complex digital systems where multiple peripherals share limited I2C lines.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult 3PEAK directly for alternative recommendations or verify pin-to-pin compatibility with other 4-channel I2C switches from different manufacturers.