XR21B1421 Datasheet PDF - Exar Enhanced 1-Ch Full-Speed USB HID to UART Bridge Specs

XR21B1421 - Enhanced 1-Ch Full-Speed USB HID to UART Bridge

Datasheet Summary

Description

The XR21B1421 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) bridge to HID class USB interface.

The USB interface is fully compliant to the USB 2.0 (Full-Speed) specification with 12 Mbps USB data transfer rate.

Features

±15kV ESD on USBD+/USBD.
USB 2.0 Compliant, Full-Speed (12Mbps).
Unique pre-programmed USB serial number.
Internally generated 48MHz core clock.
Enhanced UART features.
Baud rates up to 12 Mbps.
Fractional Baud Rate Generator.
512-byte TX and 512-byte RX FIFOs.
Auto Hardware / Software Flow Control.
Multidrop and Half-Duplex Modes.
Auto RS-485 Half-Duplex Control.
Selectable GPIO or Modem.

Datasheet Details

Part number	XR21B1421
Manufacturer	Exar
File Size	387.20 KB
Description	Enhanced 1-Ch Full-Speed USB HID to UART Bridge
Datasheet	XR21B1421 Datasheet
Additional preview pages of the XR21B1421 datasheet.

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Full PDF Text Transcription

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General Description The XR21B1421 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) bridge to HID class USB interface. The USB interface is fully compliant to the USB 2.0 (Full-Speed) specification with 12 Mbps USB data transfer rate. The USB interface also supports USB suspend, resume and remote wakeup operations. The USB Vendor ID, Product ID, power mode, remote wakeup support, maximum power, and numerous other settings may be programmed in the no-chip OTP memory via the USB interface using either HID reports or Exar-supplied OTP programming tools. The XR21B1421 includes an internal oscillator and does not require an external crystal/oscillator. Any UART baud rate up to 12 Mbps may be generated with this internal clock and the fractional baud rate generator.

Published: Sep 2, 2016 |