Maxim Integrated DS2488X+T, Input Output Controller, 8-Pin 8 WLP

The Maxim Integrated DS2488 is a simple bridge device that with a single dedicated contact on each side of the bridge enables up to 512kbps pass-through communication, power delivery for battery charging, small message exchange, and state reporting between two microcontroller-based subsystems.

Its two-contact solution enables advance TWS features
It has full range of capabilities for earbud and charging case detection
Minimalist dual 1-wire interface reduces cost and complexity

Datasheet - DS2488X+T