TPT29545-TS4R

Specialized Overview

The TPT29545-TS4R is a 1:4 bidirectional translating I2C switch in a TSSOP20 package. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features four active-low interrupt inputs, an active-low reset input, and two address terminals allowing up to four devices on the bus. It provides ESD protection exceeding ±4,000 V (HBM) and ±1,500 V (CDM), with latch-up performance exceeding 200 mA per JESD 78. Characterized for temperatures from -40°C to +85°C.

Specialized Feature Summary

• Bidirectional translation between 2.5-V, 3.3-V, and 5-V buses
• Four active-low interrupt inputs with one combined output
• Active-low reset input for bus recovery
• Low on-state resistance switches

Specialized Applications

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

Specialized Procurement Notes

Verify the specific ordering suffix TS4R corresponds to the TSSOP20 package and tape and reel transport media containing 3,000 units. Confirm the operating temperature range is -40°C to +85°C. Ensure compliance with RoHS standards and halogen-free requirements as defined by the manufacturer's green product specifications before procurement.

Specialized Selection Notes

Select this component when a single upstream I2C bus must fan out to four downstream channels with independent control. It is suitable for environments requiring voltage level translation among 2.5 V, 3.3 V, and 5 V buses. The integrated interrupt and reset functions make it appropriate for systems needing bus fault recovery and status monitoring capabilities.

Specialized Part Context

This part belongs to the TPT29545 series of I2C switches manufactured by 3PEAK. It is designed to expand I2C bus capacity while managing voltage levels. The datasheet revision history indicates updates through December 2024, ensuring current technical specifications are documented for design integration.

Specialized Replacement Considerations

No public substitute part numbers are confirmed in the provided documentation. Verify pin compatibility and electrical parameters if considering alternative vendors.

Specialized FAQ

How does the TPT29545 handle stuck buses?

An active-low reset input allows the device to recover from a stuck low state on any downstream I2C bus by resetting the internal state machine and deselecting all channels.

What is the maximum clock frequency supported?

The device supports Standard Mode and Fast Mode I2C devices with a maximum clock frequency of 400 kHz.

Can multiple channels be enabled simultaneously?

Yes, the programmable control register allows enabling one or several SCn/SDn downstream pairs simultaneously, provided the total bus capacitance limits are not exceeded.