mx128dw Consumer Microcircuits Limited, mx128dw Datasheet

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mx128dw

Manufacturer Part Number
mx128dw
Description
Audio Band Scrambler
Manufacturer
Consumer Microcircuits Limited
Datasheet

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Part Number:
MX128DW
Manufacturer:
CML
Quantity:
20 000
D/128/3 April 2005
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:
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.
© 2005 CML Microsystems Plc
COMMUNICATION SEMICONDUCTORS
Features
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.
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
CML Microcircuits
1
Applications
Cordless Telephones
Wireless PBX
Two-Way Radio
(FRS, GMRS, MURS, PMR446)
Leisure Radio
FX/MX128
Audio Band
Scrambler
Provisional Information
D/128/3

Related parts for mx128dw

mx128dw Summary of contents

Page 1

CML Microcircuits COMMUNICATION SEMICONDUCTORS D/128/3 April 2005 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 1.1 Brief ...

Page 2

Audio Band Scrambler Section 1.2 Block Diagram ..........................................................................................................3 1.3 Signal List .................................................................................................................4 1.4 External Components ..............................................................................................5 1.5 Application ................................................................................................................6 1.6 Application Notes .....................................................................................................6 1.7 Performance Specification ......................................................................................7 1.7.1 Electrical Performance ................................................................................................7 1.7.2 Packaging..................................................................................................................10 © 2005 CML Microsystems Plc CONTENTS 2 ...

Page 3

Audio Band Scrambler 1.2 Block Diagram © 2005 CML Microsystems Plc Figure 1: Block Diagram 3 FX/MX128 D/128/3 ...

Page 4

Audio Band Scrambler 1.3 Signal List All Signal Packages Pin No. Name XTALN 1 2 XTAL/CLOCK TXOUT TX GAIN AMP 5 OUT 6 TXIN BIAS RXIN RX ...

Page 5

Audio Band Scrambler 1.4 External Components Components Note: Xtal circuitry shown is in accordance with CML’s Xtal Application Note. Figure 2: Recommended External Components © 2005 CML Microsystems Plc Value X1 10.24MHz R1 1.0MΩ C1 0.47µF C2 22.0pF C3 22.0pF ...

Page 6

Audio Band Scrambler 1.5 Application Figure 3: Block Diagram of a Typical Application of the FX/MX128 (Cordless Phone) 1.6 Application Notes Formulae for calculating the carrier frequency, upper cutoff frequency and lower cutoff frequency with clock select pin high are ...

Page 7

Audio Band Scrambler 1.7 Performance Specification 1.7.1 Electrical Performance Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. General Supply ( Voltage on any pin Current in ...

Page 8

Audio Band Scrambler Operating Characteristics For the following conditions unless otherwise specified 3. 25°C DD AMB Clock Frequency = 10.24MHz Audio Level 0dB ref. at 1kHz = (V Static Values Supply Current Input Impedance Digital ...

Page 9

Audio Band Scrambler Passband Gain (@1kHz ref.) Rx and Tx Channel Switched-Capacitor Filter Sampling Carrier Frequency Invert Mode Combined Tx and Rx Response Passband -3dB Cutoff Frequencies Low High Passband Gain Distortion (@1kHz) Passband Gain (@1kHz ref.) Low Frequency Roll-off ...

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... Audio Band Scrambler 1.7.2 Packaging Figure 4: 16-pin SOIC Mechanical Outline: Order as part no. FX128D4 or MX128DW Figure 5: 16-pin PDIP Mechanical Outline: Order as part no. FX128P3 or MX128P © 2005 CML Microsystems Plc 10 FX/MX128 D/128/3 ...

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... Fax: +44 (0)1621 875600 Fax: +1 336 744 5054 Sales: Sales: sales@cmlmicro.com us.sales@cmlmicro.com Technical Support: Technical Support: techsupport@cmlmicro.com us.techsupport@cmlmicro.com www.cmlmicro.com www.cmlmicro.com/products/datasheets/download.htm www.cmlmicro.com/products/applications/ CML Microcircuits (USA) Inc Kallang Pudding Road, #09 to 05/06 Mactech Industrial Building, Singapore 349307 Tel: +65 6745 0426 800 638 5577 Fax: +65 6745 2917 Sales: sg ...

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