CMX644AD2 Ver la hoja de datos (PDF) - MX-COM Inc

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CMX644AD2

Bell 212A and V.22 Modem with Call Progress and DTMF

MX-COM Inc  

Bell 212A / V.22 Modem with Call Progress and DTMF

5

CMX644A Preliminary Information

CMX644A

D2/D5/P4

Signal

Description

Pin No.

Name

Type

The reference voltage for the internal A to D of the

23

A/D CAP

output

receiver. This pin must be decoupled by a capacitor

mounted close to the device pins.

The positive supply rail. Levels and thresholds within the

24

VDD

power

device are proportional to this voltage. Should be

decoupled to VSS by a capacitor mounted close to the

device pins.

This device is capable of detecting and decoding small amplitude signals. It is recommended that the printed

circuit board be laid out with a ground plane in the CMX644A area to provide a low impedance connection

between the VSS pin and the VDD and VBIAS decoupling capacitors. The receive path should be protected as

much as possible from extraneous signals.

Table 1: Signal Lists

2000 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480197.006

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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