MX165C View Datasheet(PDF) - MX-COM Inc

Part Name

Description

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MX165C

Low Voltage CTCSS Encoder/Decoder with TX/RX Filters

MX-COM Inc  

DATA BULLETIN

MX165C

Low Voltage

CTCSS Encoder/Decoder

with TX/RX Filters

Features

• Meets TIA/EIA-603 Standards

• 47 CTCSS Tones + Notone

• TX/RX Speech Filters

• Improved Sinad

• Serial or Parallel Programming

• Easy µP Interface

• Scanning on any Channel

• Standard 1MHz Xtal

(See MX465 for 4MHz)

• Low Voltage 3.3V to 5.0V

Applications

• Mobile Radio Channel Sharing

• Scan Trunking

• Wireless Intercom Traffic Control

• Hookswitch Supervision

• Repeater Control

TONE IN

TONE IN

FILTER

+

-

f TONE CLKS

CLKS

TONE DECODE

FILTER

REFERENCE

VOLTAGE

-

+

LOAD/LATCH

D5/SERIAL ENABLE 1

D4/SERIAL ENABLE 2

D3/SERIAL DATA IN

D2/SERIAL CLOCK

D1

D0

RX/TX

PTL

XTAL/CLK

XTAL

CLKS/XTAL

DIGITAL

INTERFACE

AND

CLOCK

GENERATION

CLKS/XTAL

A0-A5

D0-D10

TONE DETECT RX TONE DETECT

LOGIC

TONE OUT FILTER

TX TONE OUT

TONE

ROM

48 x 10

VDD

VSS

VBIAS

TX AUDIO IN

RX AUDIO IN

DECODE COMPARATOR REF.

DECODE COMPARATOR IN

CLK

300Hz

AUDIO FILTER

+

-

TX AUDIO OUT

RX AUDIO OUT

RX TONE DECODE

The MX165C CTCSS Encoder/Decoder is a low voltage, CMOS device that meets TIA/EIA-603 Standards. The MX165C

will encode and decode the tones 159.8Hz, 183.5Hz, 189.9Hz, 196.6Hz, 199.5Hz, 206.5Hz, 229.1Hz, and 254.1Hz in

addition to the 39 standard CTCSS tones, for a total of 47 CTCSS tones + Notone. With the incorporation of the on-chip

TX and RX speech filter, the MX165C enhances voice/tone multiplexing by attenuating TX and RX speech 36dB at

frequencies below 250Hz while passing signals > 300Hz with only 1dB of ripple. This not only minimizes CTCSS talk-off

in the TX mode but also improves Hum and Noise performance in the RX mode.

Available in the following package styles: 24-pin TSSOP (MX165CTN), 24-pin SOIC (MX165CDW), 24-pin PLCC

(MX165CLH), and 24-pin PDIP (MX165CP), the MX165C requires a single 3.3V to 5.0V supply and a 1MHz clock or

crystal.

© 1997 MX•COM Inc.

www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054

Doc. # 20480102.008

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

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