TS5USBA43402YZPR

Overview

The TS5USBA43402 is a Micro USB switch IC designed to interface cellphone UART, USB, and audio chips with external peripherals via a micro-USB connector. It features impedance detection for accessory identification through DP and DM pins, automatically switching channels for data, audio, or UART based on the detected accessory. The device includes integrated LDOs for VREF and mic bias, supports USB 2.0 High Speed, and provides negative rail support with click/pop reduction for audio paths. It operates on a 1.8-V compatible I2C interface and generates interrupts upon plug/unplug events.

Feature Summary

• Integrated impedance detection mechanism identifies accessories attached via the micro-USB port and switches to appropriate channels.
• Supports USB 2.0 High Speed data paths alongside dedicated UART and stereo audio signal routing.
• Includes integrated low-dropout regulators (LDOs) providing stable voltage references and microphone bias.
• Features audio path click/pop reduction and negative rail support for high-fidelity headset applications.

Applications

• Cellular telephones
• Stereo headsets with microphone
• Dedicated charger connections
• Host/Hub charger interfaces

Procurement Notes

Verify the specific ordering suffix YZPR against the manufacturer's current Package Option Addendum to confirm tape-and-reel packaging and RoHS compliance status. Ensure the design accounts for the 20-pin DSBGA package thermal characteristics and pin assignments defined in the official datasheet.

Selection Notes

Select this component when a single IC must manage multiplexing between USB, UART, and audio signals while simultaneously performing accessory impedance detection. It is suitable for designs requiring integrated power regulation for microphone bias and automatic channel selection without external logic controllers.

Part Context

This part belongs to Texas Instruments' specialized MUIC (Mobile USB Interface Controller) family. It integrates switch matrix functionality with detection logic, distinguishing it from standard analog switches that require external control for path selection. The YZP package offers a compact footprint suitable for mobile device constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing I2C register maps and pin configurations if considering alternative MUIC devices from other manufacturers.

FAQ

How does the device identify connected accessories?

The device uses an internal ADC to measure resistance on the ID pin relative to ground. It compares this value against calibrated thresholds to determine the accessory type and configures the switch matrix accordingly.

What determines the default switch state at power-up?

The Default Switch State (DSS) pin determines the initial configuration. An internal pulldown selects USB switches as default, while pulling the pin high selects UART switches. If VBAT power is present without VBUS, switches are disabled by default.

Does the TS5USBA43402 support high-current charging modes?

Yes, it includes an ISET output pin that can signal a charger IC to enable high-current charging modes upon detection of compatible chargers.