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Exar devices suit datacom platforms

Posted: 01 Jul 2003 ?? ?Print Version ?Bookmark and Share

Keywords:exar? universal asynchronous receiver transmitter? uart? xr16l2551? xr16l2450?

Exar Corp. has released what it claims is the industry's smallest Universal Asynchronous Receiver Transmitter (UART) package for data communications platforms. The device targets portable communication systems such as handheld data entry terminals, Point-of-Sale (POS)/credit authorization terminals, global positioning systems, and CDMA cellular phones.

The XR16L2551, the first in a four part family, features a selectable microprocessor data bus and a PowerSave function that reduces the power consumption to <30?A during sleep mode. The device also offers a hardware pin for selecting either an Intel or Motorola data bus interface, has two independent UART channels, and operates from 2.25V to 5.5V with 5V tolerant inputs.

In addition to the XR16L2551, the UART family also includes the XR16L2450, XR16L2550, and XR16L2552 series. All devices operate over the industrial temperature range, have an internal loopback facility that allows power-up system diagnostics, plus on-board status registers that provide the user with receive data error indications and operational status.

The XR16L2450 is pin- and function-compatible to the ST16C2450 and is offered in 44-PLCC and 48-TQFP. The XR16L2550 is pin- and function-compatible to the ST16C2550, XR16L2750, and XR16C2850, and is offered in 32-QFN, 44-PLCC and 48-TQFP. The XR16L2551 is pin- and function-compatible to the XR16L2751, and is offered in 32-QFN and 48-TQFP. And the XR16L2552 is pin- and function-compatible to the ST16C2552, XR16L2752, and XR16C2852, and is offered in 44-PLCC and 48-TQFP.

In 1,000-piece quantities, the XR16L2551 is priced at $3.75 each and the XR16L2550 at $3.40 each.





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