Consumer Microcircuits Limited CMX264
The CMX264 is a frequency domain scrambler for use in analogue cellular phone systems. It contains separate Tx and Rx paths for full duplex operation and operates under µProcessor control via a simple serial interface. The frequency at which the signal is split, the “split-point”, can be either fixed or rolling between four possible settings resulting in a transmitted audio signal which is unintelligible to eavesdroppers.- Max Operating Temp : 85°C
- Min Operating Temp : -40°C
Source:
Octopart
| Part No. | CMX264 |
|---|---|
| Datasheet | CMX264 Download |
| Manufacturer |  Consumer Microcircuits Limited |
| Description | Frequency Domain Split Band Scrambler |
| Buy | Stock & Price |
FEATURES
● Ensures Privacy●
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● Full Duplex High Quality Recovered Audio Low Height, Surface Mount Package 3.0V, Low Power Operation
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● Fixed or Rolling Code Standby Mode Uses Split Band Inversion Low Current, Low Voltage 4.433619MHz Operation 1.1 Brief
DESCRIPTION
In the Tx path, scrambling is achieved by splitting the audio band into two parts, or sub-bands, and frequency inverting each one. Descrambling is achieved by a receive device set to the same split point as the remote transmitter. Thus if the Tx and Rx devices are synchronously cycled through the same sequence of split points, a clear recovered signal will emerge at the output of the receiver. A 4.433619MHz crystal is used allowing up to four split points to be programmed. The device is designed to be compatible with existing cellphone circuitry. © 1999 Consumer Microcircuits Limited Frequency Domain Split Band Scrambler CMX264 CONTENTS Section Page 1.0FEATURES
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