Product category: Communications ICs (Wired)
News Release from: CML Microcircuits | Subject: CMX867A
Edited by the Electronicstalk Editorial Team on 4 May 2006
Modem chip takes DTMF decoder onboard
The CMX867A is an enhanced V.22 multistandard modem IC specifically targeted at telephone based information systems
New from CML, the CMX867A is an enhanced V.22 multistandard modem IC, specifically targeted at telephone based information systems. The key feature of the CMX867A is the inclusion of a high-quality DTMF decoder, offering excellent immunity to falsing on voice, which greatly increases the applications to which this advanced modem IC is suited.
This article was originally published on Electronicstalk on 4 May 2006 at 8.00am (UK)
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Operations such as those met in industrial control systems, security systems, telephone telemetry and advanced payphones are but a few of the CMX867A's target applications.
Compliant with ITU and Bell recommendations, the CMX867A is fully backward compatible with the popular CMX867, allowing existing users to re-use their current software and hardware designs.
Control and data transfer on the CMX867A is via a simple high-speed serial bus, compatible with standard microcontroller interfaces.
Data transfer is conveniently handled by user-selected 8bit bytes or 16bit words via on-chip, programmable Tx and Rx USARTs.
Supported formats are either transparent synchronous data or multiformat asynchronous data compatible with ITU V.14 recommendations.
The device features a ringing-signal/line-reversal detector that continues to function when the device is in its power-save mode, providing an interrupt which can be used to wake-up the host controller when these signals are detected.
A hook-switch/relay-drive output, software gain controls and DTMF transmit twist compensation complete the DAA controller.
Flexible line-drivers and a receiver hybrid are integrated on-chip, requiring only passive external components to operate in a two- or four-wire line interface.
The CMX867A is an ultra-low-voltage device, operating from a single 2.7 to 5.5V supply and is available in 24-pin TSSOP, SOIC and DIL packages.
The guide price for this product is $2.50.
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