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The RT8973A is a USB port accessory detector and switch that is optimized to protect low voltage system from abnormal high input voltage (up to 28V). The RT8973A supports high speed USB operation and I2C interface control. The RT8973A provides a device detection function by using the USB ID pin signal and the VBUS voltage. The ID pin resistance and VBUS voltage determine the unique characteristics for variety accessories. The host microprocessor can use I2C interface to control the switch position and read the results of the accessory detection. The RT8973A also detects USB chargers including dedicated chargers (D+/D- shorted) and high power host/hub chargers.
Hi-Speed USB Operation
UART Switch
Interrupt for Device Insertion and Removal
Interrupt for Protection Function
Default Startup Mode for Factory Support
Battery Charger Detection (BCD 1.2) Compliant
28V Maximum Rating for DC Adapter
Integrated Over-Voltage and Over-Current Protection FET On VBUS for Fault Isolation
I2C Controlled Interface
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