Details, datasheet, quote on part number: FX214
PartFX214
CategoryAnalog & Mixed-Signal Processing
DescriptionFrequency Domain Split-band Scrambler
CompanyConsumer Microcircuits Limited
DatasheetDownload FX214 datasheet
Quote
Find where to buy
 
  

 

Features, Applications

1.0 Features Ensures Privacy Full Duplex High Quality Recovered Audio Low Height, Surface Mount Package 3.0V, Low Power Operation

Fixed or Rolling Code Standby Mode Uses Split Band Inversion Low Current, Low Voltage 4.433619MHz Operation

The 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 ÁProcessor control via a simple serial interface. In the Tx path, scrambling is achieved by splitting the audio band into two parts, or sub-bands, and frequency inverting each one. 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. 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.

Features......................................................................................................1 1.1 Brief Description.........................................................................................1 1.2 Block Diagram............................................................................................3 1.3 Signal List...................................................................................................4 1.4 External Components.................................................................................6 1.5 General Channel..................................................................................8 1.5.3 Serial Interface............................................................................9 1.6 Application Notes.....................................................................................13 1.6.1 General Use...............................................................................13 1.6.2 Input Anti-Alias and Output Smoothing Filters.......................13 1.7 Performance Specification.......................................................................14 1.7.1 Electrical 1.7.2 Packaging..................................................................................25


 

Some Part number from the same manufacture Consumer Microcircuits Limited
FX224 VSB Audio Scrambler
FX301L Frequency Sensitive Switch
FX304 C-net Audio Processor
FX306 Audio Filter Array
FX307 Selective Signalling Device
FX309 Continuously Variable Slope Delta Modulation
FX3090 Delta Modulationencoder/decoder Hybrid
FX313 QTC Data Store/dispaly Driver
FX313K Fx202 is an Obsolete Product - For Information Only -
FX315 CTCSS Encounter
FX316 NMT Audio Filter Array
FX323 QTC Data Store/dispaly Driver
FX326 Audio Bandpass Filter
FX335 CTCSS Encoder/decoder
FX336 R2000 Filter Array
FX346 Amps, Tacs, NMT Audio Processing Array
FX355 CTCSS Encoder/decoder
FX365 CTCSSEncoder/Decoder 
FX365A CTCSS Encoder/decoder
FX365C Low-voltage CTCSS Encoder/decoder
FX365J CTCSSEncoder/Decoder 

CMX813 : Multi-standardanalogue Paging Decoder 

CMX868 : Low Power V.22bisModem 

FX429A : 1200/2400 Baud FFSK Modem For Trunked Radio Systems

FX589 : Low-voltage/high-speed GMSK Modem: App Note

FX806ALG : Audio Processor

FX809LS : FFSK Modem

MX335L : CRCSS Encoder/decoder

MX651 : PCM Line Card->Signaling & Control Telephone Subscriber Pulse Metering & Anti Fraud Tone Processor

 
0-C     D-L     M-R     S-Z