Exar has released the XR21B1411, a new addition to the
Full-Speed USB UART series. These USB UARTs feature +/-
15kV HBM ESD protection, up to 12Mbps serial data rate,
optimized software drivers including Microsoft WHQL certification,
and supports FIFO sizes of 128-byte TX and 384-byte RX.
Exar has also released a design tool named the Exar I/O
Lab for XR21B1411.
"With on-chip +/-15kV HBM ESD protection on the USB
data pins, the XR21B1411 differentiates itself from competitive
devices by providing a robust and cost effective solution,"
said Levent Ozcolak, vice president, Interface Product Line.
"With the most extensive UART portfolio available including
8-bit, USB, PCI, PCIe, I2C/SPI, VLIO devices, Exar again
solidifies its position as an Interface solution innovator
with the addition of the XR21B1411 to our market-proven
XR21V14x series."
The XR21B1411 targets embedded and consumer applications.
Examples of embedded applications are gaming systems, ATM
machines, and industrial automation systems amongst others.
For consumer applications, the series is ideal for smart
phones, Personal Digital Assistants (PDAs), notebooks, GPS
systems, DVD players/recorders and other portable applications.
"For USB bus powered and/or battery operated applications,
the XR21B1411 is an ideal fit," said Rakesh Bhatia,
senior manager, strategic marketing, Interface Products
Line. "It operates from a single 5V power supply and
the on-chip +/-15kV HBM ESD feature minimizes the number
of external components needed, thereby reducing the Bill-of-Materials
(BOM)."
The XR21B1411 has a USB device controller that is compliant
with Full-Speed (12Mbps) USB 2.0 specification. The device
has an on-chip one-time programmable (OTP) memory. These
devices also feature Vendor ID, Product ID, bus-powered
mode, self powered mode, remote wakeup support or maximum
power consumption values, and default baud rate settings.
The device has an array of features including large FIFO
sizes of 128-byte TX and 384-byte RX that optimize overall
data throughput, automatic hardware (RTS/CTS or DTR/DSR)
flow control, automatic software (Xon/Xoff) flow control,
and multi-drop mode with auto half-duplex transceiver control.
The XR21B1411 operates from an internal clock that is programmable
to 6, 12, 24 or 48 MHz, hence eliminating the need for any
external crystal / oscillator. With the fractional baud
rate generator, any baud rate up to 12 Mbps can be accurately
generated using the internal clock. Software drivers for
Windows 7, 2000, XP, Vista, CE, Linux, and Mac are supported
for the XR21B1411.
Package: 16-pin 3mm x 3mm QFN
Price: US$1.89 for 1K pieces
Availability: Now
