Product category:
Communications ICs (Wired)
News Release from: Nu Horizons Electronics Corp | Subject: Exar M-Series
Edited by the Electronicstalk Editorial
Team on 02 October 2006
Dual UARTs run up to 16Mbit/s
Exar has announced a family of dual universal asynchronous receiver transmitters that operate from a 1.62 to 3.63V supply and feature 16, 32 or 64byte FIFOs.
Exar has announced a family of dual universal asynchronous receiver transmitters (DUARTs) that operate from a 1.62 to 3.63V supply and feature 16, 32 or 64byte FIFOs Designated the M-series, each channel of these devices is capable of datarates up to 16Mbit/s at 3.3V with a 4x sampling clock
This article was originally published on Electronicstalk on 25 Mar 2004 at 8.00am (UK)
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They are all compatible with industry standard 16550 UARTs and provide a host of additional features including selectable TX and RX FIFO trigger levels, automatic hardware (RTS/CTS) flow control, automatic software (Xon/Xoff) flow control, sleep mode, and a fractional baud rate generator.
Some versions add a power save function that operates in sleep mode and isolates the address, data and control lines from the CPU to reduce sleep current to 15uA.
The fractional baud rate generator is a new feature that provides a greater choice of clock or crystal frequency.
It allows divisors from 1 to 215.9375 in steps of 0.0625.
As a result, a nonstandard clock frequency can be used to generate standard baud rates or a standard clock can generate nonstandard baud rates.
Some versions, in all FIFO types, can operate in either Intel or Motorola bus modes.
M-series DUARTs are available in 48-TQFP and 32-QFN packages.
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