The HT42B534-x device is a high performance USB to UART bridge controller with fully integrated USB and UART interface functions, designed for applications that communicate with various types of UART. The device includes a USB 2.0 full speed compatible interface which is used for PC communication. The device also includes a fully integrated high speed oscillator which is used as clock source for the USB and UART baud rate generator. The baud rate generator can support up to 3Mbps of baud rate for the UART interface.

Features:

• Operating Voltage (VDD): 3.3V~5.5V
• UART pins Voltage (VDDIO): 1.8V~VDD (Less than VDD voltage)
• Power down and wake-up functions to reduce power consumption
• Fully integrated internal 12MHz oscillator with 0.25% accuracy for all USB modes which requires no external components
• USB interface
  • USB 2.0 Full Speed compatible
  • Implements USB protocol composite device:
    • Communication Device Class (CDC) for communications and configuration
    • Human Interface Device (HID) for user configure USB VID, PID and device description strings
  • Internal 1.5kΩ pull-high resistor on D+ pin
• Fully-duplex Universal Asynchronous Receiver and Transmitter Interface -- UART
• Supports Baud Rate up to 3Mbps
• Supports maximum 128 bytes transmit buffer and 128 bytes receive buffer
• UART Data formats supported:
  • Data bits: 8
  • Stop bits: 1 or 2
  • Parity: odd, even, no parity
• Supports RTS/CTS pins for auto flow control
• Supports RX pin resume signal to request a remote wake-up
• Supports VDDIO pin for UART pins power supply
• Supports automatic resynchronization function
• Supports standard Windows® drivers for Virtual Com Port (VCP): Windows XP (SP2), Vista, Widows 7 & Windows 8 (only an INF file is required), Windows 10
• Supports Android 4.0 or later version and Mac OS X
• Integrated 256 bytes true EEPROM for user memory
• Package types: 8-pin SOP, 10-pin SOP/MSOP, 16-pin NSOP