TPT29548A-QF8R

Specialized Overview

The TPT29548A is an 8-channel bidirectional translating I2C switch with an active-low reset input. It operates within a supply voltage range of 2.3 V to 5.5 V and supports Standard Mode (100 kHz) and Fast Mode (400 kHz). The device allows voltage-level translation between 2.5-V, 3.3-V, and 5-V buses, with all I/O terminals rated for 5.5 V tolerance. It features low on-state resistance switches and supports hot insertion. ESD protection exceeds 3.5 kV Human-Body Model and 1.5 kV Charged-Device Model standards. The component is available in TSSOP24 and QFN24L packages and is characterized for operation from −40°C to +85°C.

Specialized Feature Summary

• Bidirectional translation capability enables communication between different bus voltage levels without additional protection components.
• Active-low reset input facilitates recovery from stuck-low downstream buses by resetting the internal state machine.
• Three address terminals allow up to eight distinct devices to coexist on the same I2C bus.
• Supports hot insertion and provides robust latch-up performance exceeding JESD 78 specifications.

Specialized Applications

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

Specialized Procurement Notes

Verify the specific package variant required for the design, as the TPT29548A is offered in both TSSOP24 and QFN24L configurations. Confirm that the selected ordering suffix matches the desired tape and reel quantity and transport media. Ensure the operating temperature range aligns with the system's environmental requirements before finalizing procurement.

Specialized Selection Notes

Select this component when multiple I2C slaves share identical addresses or require connection to mixed-voltage buses. The device supports simultaneous channel selection via its programmable control register. Verify that the total bus capacitance does not exceed the specified limits for the target clock frequency. Ensure external pull-up resistors are sized appropriately for each channel's voltage level.

Specialized Part Context

This part belongs to the TPT29548 family of I2C switches manufactured by 3PEAK. It serves as a specialized interface solution for expanding I2C bus capabilities in complex electronic systems. The device integrates logic for channel selection and voltage translation into a compact footprint suitable for space-constrained applications.

Specialized Replacement Considerations

The TPT29548A-QF8R is functionally equivalent to the TPT29548A-TS5R, differing only in the physical package type (QFN24 vs. TSSOP24). No other cross-model substitutes are documented in the official datasheet.