Electronicdesign 7720 Exarusb Serial
Electronicdesign 7720 Exarusb Serial
Electronicdesign 7720 Exarusb Serial
Electronicdesign 7720 Exarusb Serial
Electronicdesign 7720 Exarusb Serial

USB-to-Serial Bridge Accelerates Multichannel Throughput

Sept. 23, 2014
A new family of USB-to-serial bridge devices offers a straightforward way to interface with RS-232 or RS-485 serial networks through USB, using a minimum of components and printed-circuit-board space.

A new family of USB-to-serial bridge devices offers a straightforward way to interface with RS-232 or RS-485 serial networks through USB, using a minimum of components and printed-circuit-board space. The XR21B1420, XRB21B1422, and XRB21B1424 from Exar feature 1, 2, and 4 UART channels respectively. Also, the XRB21B1421, replete with single-channel UART, uses the native operating system HID (Human Interface Device) driver.

The XR21B142x devices fully comply with the USB 2.0 (Full-Speed) specification, maintaining a 12-Mbit/s USB data-transfer rate and delivering high data throughput, especially when multiple channels are operating simultaneously. Large 512-byte transmit (TX) and receive (RX) FIFOs enable maximum data throughput of 9 Mbits/s across up to four UART channels.

The family incorporates ±15-kV electrostatic-discharge (ESD) protection on the USB pins, eliminating the need for additional protection components and saving space. The devices also feature an internal oscillator, removing the need for an external crystal. The devices can be powered directly from the USB host’s 5-V supply. Furthermore, an integrated low-dropout linear regulator provides a regulated 3.3-V output.

EXAR

Sponsored Recommendations

Understanding Thermal Challenges in EV Charging Applications

March 28, 2024
As EVs emerge as the dominant mode of transportation, factors such as battery range and quicker charging rates will play pivotal roles in the global economy.

Board-Mount DC/DC Converters in Medical Applications

March 27, 2024
AC/DC or board-mount DC/DC converters provide power for medical devices. This article explains why isolation might be needed and which safety standards apply.

Use Rugged Multiband Antennas to Solve the Mobile Connectivity Challenge

March 27, 2024
Selecting and using antennas for mobile applications requires attention to electrical, mechanical, and environmental characteristics: TE modules can help.

Out-of-the-box Cellular and Wi-Fi connectivity with AWS IoT ExpressLink

March 27, 2024
This demo shows how to enroll LTE-M and Wi-Fi evaluation boards with AWS IoT Core, set up a Connected Health Solution as well as AWS AT commands and AWS IoT ExpressLink security...

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!