Microcom 224 Manual do Utilizador descarregar pdf

DATA BULLETIN

MX214/224

1998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.002

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

Variable Split Band

Inverter

Features Applications



CTCSS Highpass Filter



Good Recovered Audio Quality



Fixed and Rolling Code Modes



Serial (MX214) and Parallel (MX224)

Loading Options



32 Programmable Split Points



Half-Duplex Capability



Mobile Radio Voice Security



Cellular Telephone Voice

Security

CLEAR / SCRAMBLE

EN / MUTE

Rx / Tx

LOAD / LATCH

SERIAL CLOCK

ENABLE / MUTE

CLEAR / SCRAMBLE

Rx / (SER / PAR)Tx

(SERIAL DATA IN)

Rx IN

BIAS

EN Rx⋅⋅PS

MUTE

BIAS

Tx ⋅ PS

BIAS

Tx IN

BIAS

CLEAR

SCRAMBLE

BIAS

PS MUTE Rx⋅⋅

Rx OUT

PS + EN Rx⋅

CTCSS

PS EN Tx⋅⋅

PS + EN Tx⋅

Tx OUT

CLOCK

SWITCHING

Rx / Tx

BIAS

CLOCK

DIVIDER

1MHz

CK4

CLOCK

DIVIDER

ROM

1MHz

OSC

XTAL / CLOCK

XTAL

INPUT LATCHES

POWERSAVE

FILTER 3

FILTER 2FILTER 1

FILTER 4

The MX214/224 Variable Split Band Inverters are designed for mobile and cellular radio voice security

applications. Digital control functions are loaded serially into the MX214. The MX224 is loaded in parallel.

The MX214/224 ICs include a highpass filter that rejects subaudio frequencies, ensuring full CTCSS

compatibility. This CTCSS filter is not included on the earlier generation MX204 VSB Inverter.

The MX214/224 splits the voiceband (300-2700Hz) into upper and lower subbands, and inverts each subband

about itself. The ‘split point’ (defined as the frequency where the voice band is subdivided), is externally

programmable to 32 distinct values in the 300 to 3000Hz range. In the ‘fixed code’ mode, a single point is

used. Fixed mode operation nets approximately 4 mutually exclusive secure channels.

In ‘rolling code’ mode, the split point is changed many times per second, usually under control of a

microprocessor. Rolling code scrambling requires synchronization, offers higher security than fixed code

operation, and provides a much greater number of mutually exclusive secure channels.

The MX214/224 offers a recovered audio product close to that of a telephone. The on-chip ‘ Mute’ function is

useful when implementing rolling code continuous synchronization schemes. ‘Powersave’ and

‘Clear/Scramble’ controls are also included on-chip. Timing and filter clocks are derived internally from an

on-chip 1MHz reference oscillator driven by a 1MHz crystal or clock pulse input.

The MX214 and the MX224 operate from a single 5.0V supply and available in the following packges:

22-pin CDIP (MX214J/MX224J), 22-pin PDIP (MX214P/MX224P), and 24-pin PLCC (MX214LH/MX224LH).

1 2 3 4 5 6 ... 16 17

Resumo do Conteúdo

Página 1 - MX214/224

DATA BULLETINMX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024800 Bethania Statio

Página 2 - Contents

Variable Split Band Inverter 10 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 3 - 1. Block Diagram

Variable Split Band Inverter 11 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 4 - 2. Signal List

Variable Split Band Inverter 12 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 5

Variable Split Band Inverter 13 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 6

Variable Split Band Inverter 14 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 7 - 3. External Components

Variable Split Band Inverter 15 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 8 - 4. General Description

Variable Split Band Inverter 16 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.0024

Página 9 - 5. Application

CML Product DataIn the process of creating a more global image, the three standard product semiconductorcompanies of CML Microsystems Plc (Consumer Mi

Página 10

Variable Split Band Inverter 2 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 11 - 6. Performance Specifications

Variable Split Band Inverter 3 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 12

Variable Split Band Inverter 4 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 13

Variable Split Band Inverter 5 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 14 - Serial Loading

Variable Split Band Inverter 6 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 15 - 6.2 Packages

Variable Split Band Inverter 7 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 16 - Package Tolerances

Variable Split Band Inverter 8 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

Página 17 - CML Microcircuits

Variable Split Band Inverter 9 MX214/2241998 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 Doc. # 20480112.00248

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Microcom 224 Manual do Utilizador

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