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Details, datasheet, quote on part number:FX128
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Datasheet text preview:
FX/MX128
CML Microcircuits
C O M M U N I C ATION SEMICONDUCTORS
D/128/2 January 2003
Audio Band Scrambler
Provisional Information
Features
· · · · · · · Full-Duplex Audio Processing On-Chip Filters Carrier Rejection >55dB Uses IF (10.24 MHz) Clock Excellent Audio Quality Low Power Operation (3.0V) Battery Powered Portability
Applications
· · · · Cordless Telephones Wireless PBX Two-Way Radio Leisure Radio (FRS, GMRS, MURS, PMR446)
1.1 Brief Description The FX/MX128 is a full-duplex frequency inversion scrambler designed to provide secure conversations. The Rx and Tx audio paths consist of the following: 1. A switched-capacitor balanced modulator with high baseband and carrier rejection. 2. A 3.3 kHz inversion carrier (injection tone). 3. A 3100 Hz lowpass filter. 4. Input op-amps with externally adjustable gain. The FX/MX128 uses mixed signal CMOS switched-capacitor filter technology and operates from a single supply in the range of 3.0 to 5.5 volts. The inversion carrier's frequency and filter switching clock are generated on-chip using an external 10.24 MHz or 3.58/3.6864 MHz crystal or clock input (selectable). This device is available in the following package styles: 16-pin SOIC,TSSOP and PDIP.
© 2003 CML Microsystems Plc
Audio Band Scrambler
FX/MX128
CONTENTS
Section 1.2 1.3 1.4 1.5 1.6 1.7 Page
Block Diagram.......... 3 Signal List........ 4 External Components.... 5 Application ...... 6 Application Notes .......... 6 Performance Specification..... 7
1.7.1 1.7.2 Electrical Performance ....7 Packaging ......10
© 2003 CML Microsystems Plc
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D/128/2
Audio Band Scrambler
FX/MX128
1.2
Block Diagram
Figure 1: Block Diagram
© 2003 CML Microsystems Plc
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D/128/2
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