MX375LH データシートの表示（PDF） - MX-COM Inc

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MX375LH

Pvt SQUELCH™ CTCSS Encoder/Decoder

MX-COM Inc  

PvtSQUELCHTM CTCSS Encoder/Decoder

3

1. Block Diagram

MX375

TX Audio

Input

RX Audio

Input

XTAL

XTAL

TX

TX

6dB/Octave

Filter

Output

BIAS

RX

fEMPH

fCLK1

Balanced

Modulator

Input

CLR

-6dB/Octave

fCARRIER fCLK2

PVT

RX

fEMPH

TX

TX Audio Output

BIAS

Clocks

3333Hz Reference

Filters

Hysteresis

RX Audio Output

RX Tone Decoder Output

Decode Comparator Input

RX Tone Input

Load/Latch

CTCSS

Tone Detect

3333 Hz

RX Tone Detect Output

D5 or Serial Enable 1

D4 or Serial Enable 2

D3 or Serial Data Input

D2 or Serial Clock Input

D1 Input

D0 Input

RX/TX

Control

Private Enable

Push-To-Listen

8-Bit

Shift

Register

and

Latches

LD5-LD0

Control

Logic

PTL

TX Tone

Output

fCARRIER NoTone Output

ffCCLLKK21

V

DD

fEMPH

RX Path

V

TX Path

BIAS

Private

V

SS

Figure 1: Device Block Diagram

© 1997 MX•COM Inc.

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

Doc. # 20480026.007

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

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