MX465DS データシートの表示（PDF） - CML Microcircuits

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MX465DS

LOW VOLTAGE CTCSS ENCODER/DECODER with Tx and Rx Audio Filters

CML Microcircuits 

DATA BULLETIN

MX465

LOW VOLTAGE

CTCSS ENCODER/DECODER

with Tx and Rx Audio 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 4MHz Xtal

(See MX165C for 1MHz)

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 MX465 CTCSS Encoder/Decoder is a low voltage, CMOS device that meets TIA/EIA-603 Standards.

The MX465 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 MX465 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 (MX465TN), 24-pin SSOP (MX465DS),

24-pin SOIC (MX465DW), 24-pin PLCC (MX465LH), 24-pin PDIP (MX465P), and 24-pin CDIP (MX465J) the

MX465 requires a single 3.3V to 5.0V supply and a 4MHz clock or crystal.

©1998 MX•COM, INC.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. #20480143.008

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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