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MX014 Datasheet

  • MX014

  • Voice Band inverter

  • 12頁

  • CMLMICRO

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DATA BULLETIN
MX014
Features
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CTCSS Compatible
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Fixed Frequency Inversion
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Low Power CMOS
Voice Band inverter
Applications
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Land Mobile Radio Systems
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Community Repeaters
BALMOD
DEEMP Out
RX Buffer In
TX Audio Feedback
TX Audio In
6dB/Octave
Pre-emphasis
10dB Gain
Rx Path
Path Invert
TX Buffer In
BPF Out
Filter
TX
6dB/Octave
De-emphasis
TX Audio Out
TX
BIAS
RX Audio In
Bandpass
Filter
300-3033 Hz
Bandpass
Filter
300-3033 Hz
Filsav 1
BIAS
RX Path
Filsav 1
RX Path
Carrier
RX Audio Out
Filsav 2
RX Audio Feedback
3333 Hz
PTT
PTT
RX Audio Enable
RX Audio Enable
PTL
PTL
Privacy Enable
Clock
Carrier
Filsav 1
Filsav 2
CLK
3333 Hz
CLK Generator
Clock
LOGIC
RX Path
EMPSAV
TX
Path Invert
V
DD
V
SS
BIAS
The MX014 Voice Band Inverter gives the security of private voice communications to land mobile radio users, as well as
to the users of other shared radio channel systems. Designed for use in half-duplex systems, the MX014 exchanges high
and low frequencies in the voiceband and renders transmitted messages unintelligible. This privacy function is achieved
by a single frequency inversion. When used with CTCSS,
PvtSQUELCH
TM
privacy adapter operation is achieved.
Sharp cut-off in the internal voiceband filters permits operation with CTCSS and similar sub-audio signaling schemes. This
results in high quality recovered audio.
The core of the MX014 consists of two audio band pass filters and a balanced modulator. The device uses a
programmable clock divider which controls the carrier and filter cut-off frequencies. Control of the RX/TX, PTL and
privacy function is by pin selection.
The MX014 operates from a single 5V supply and uses a 4 MHz crystal oscillator to ensure the correct pitch in recovered
speech. Signal coupling and decoupling are the only external components needed. The device is available in 24-pin
PLCC (MX014LH), 24-pin PDIP (MX014P) and 24-pin CDIP (MX014J) packages.
漏
1997 MX鈥OM, INC.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480013.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by there respective companies.

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