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Implements support for the TI TCAL6416 16-bit I2C I/O expander with the following features: - 16 GPIO pins (2 banks of 8) - Bidirectional I/O with configurable input/output modes - Support for inverted pins - Compatible with ESP32, ESP8266, and RP2040 platforms - I2C interface with configurable address (default: 0x20) The TCAL6416 provides higher current latched outputs suitable for directly driving LEDs or keypads. It operates at voltages from 1.08V to 3.6V and supports I2C speeds up to 1MHz. Addresses: https://github.com/orgs/esphome/discussions/3233
