CMX838 데이터 시트보기 (PDF) - MX-COM Inc

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CMX838

FRS/PMR446/GMRS Family Radio Processor

MX-COM Inc  

FRS/PMR446/GMRS Family Radio Processor

9

CMX838 Advance Information

Package

18

19

20

21

22

23

24

25

26

27

28

Signal

SERIAL CLOCK

input

VSS

TXMOD2

power

output

TXMOD1

output

VDD

RXOUT

BIN

AIN

VBIAS

BOUT

supply

output

input

input

bi-directional

output

AOUT

output

Description

Serial clock input to C-BUS serial control port. This clock

input controls transfer timing of commands and data to

and from the device.

Negative supply (Circuit Common)

Transmit Output 2 internally switch selected to be at any

of (1) VBIAS, (2) transmit subaudio or (3) transmit audio

summed with subaudio.

Transmit Output 1 internally switch selected to be at any

of (1) VBIAS, (2) transmit audio or (3) transmit audio

summed with subaudio.

Positive supply. Levels and voltages are dependent upon

this supply. This signal must be decoupled to VSS by a

capacitor mounted close to the device pins.

Processed receive audio output.

External processing Path B input.

External processing Path A input.

A bias line for the internal circuitry, driven to VDD/2 by a

high impedance source. This signal must be decoupled by

a capacitor mounted close to the device pins.

External processing Path B output. This provides internal

switch controlled access to either Rx or Tx audio signals

for external processing such as expanding and

unscrambling.

External processing Path A output. This provides internal

switch controlled access to either Rx or Tx audio signals

for external processing such as compressing and

scrambling.

Table 1: Signal List

¤2001 MX-COM, Inc.

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

Doc. # 20480221.002

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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