TPT29548T-QF8R-S

Specialized Overview

The TPT29548T-QF8R-S is a bidirectional translating I2C switch with an active-low reset input, designed for systems requiring voltage-level translation between 2.5 V, 3.3 V, and 5 V buses. It features eight downstream channels selectable via a programmable control register, allowing up to eight devices on the I2C bus using three address terminals. The device supports standard mode (up to 100 kHz) and fast mode (up to 400 kHz) clock frequencies. Operating power-supply voltage ranges from 2.3 V to 5.5 V, with all I/O terminals rated at 5.5 V tolerance. It includes low RON switches, latch-up protection exceeding 200 mA per JESD 78, and ESD protection exceeding JESD 22 standards.

Specialized Feature Summary

• Bidirectional translator supporting voltage-level translation between 2.5 V, 3.3 V, and 5 V buses
• Eight downstream channels selectable via a programmable control register
• Active-low reset input for recovering from stuck-low states
• AEC-Q100 qualified for automotive applications

Specialized Applications

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

Specialized Procurement Notes

Verify the component against the official 3PEAK datasheet CA20230905A0 to confirm specifications. Ensure the QFN4X4-24 package matches design requirements. Check AEC-Q100 qualification status if used in automotive contexts. Confirm operating temperature range of -40°C to +125°C aligns with system constraints. Validate supply voltage compatibility within the 2.3 V to 5.5 V range.

Specialized Selection Notes

Select this component when multiple I2C devices share conflicting addresses or require voltage translation. Ensure the system operates within the specified 2.3 V to 5.5 V supply range. Consider the 400 kHz maximum clock frequency for high-speed communication needs. Verify that the QFN4X4-24 package fits the PCB layout. Account for the need for external pull-up resistors for each channel.

Specialized Part Context

The TPT29548T is part of 3PEAK's I2C switch portfolio, specifically designed for bidirectional level shifting. It removes reserved registers found in similar devices and utilizes a QFN4X4-24 package. The 'QF8R-S' suffix indicates the specific tape and reel packaging configuration for automated assembly.

Specialized Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult 3PEAK technical support for potential alternatives if sourcing issues arise.

Specialized FAQ

How does the TPT29548T handle stuck-low I2C buses?

An active-low RESET input can be pulled low to reset the I2C state machine and deselect all channels, helping the device recover from a stuck-low condition.

What is the maximum clock frequency supported by the TPT29548T?

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

Can the TPT29548T translate between different voltage levels?

Yes, it allows voltage-level translation between 2.5 V, 3.3 V, and 5 V buses without additional protection components.