CMX644AD2 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX644AD2' PDF : 31 Pages View PDF
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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