7 supply pins – Maxim Integrated DS21Q55 User Manual
Page 22
Product Preview
DS21Q55
22 of 248
012103
Please contact
or search
http://www.maxim-ic.com
for updated
information.
Signal Name:
TTIP x and TRINGx
Signal Description:
Transmit Tip and Ring
Signal Type:
Output
Analog line driver outputs. These pins connect via a 1:2 step-up transformer to the network. See Line Interface Unit for details.
3.7 Supply Pins
Signal Name:
DV
DD
Signal Description:
Digital Positive Supply
Signal Type:
Supply
3.3V ±5%. Should be tied to the RV
DD
and TV
DD
pins.
Signal Name:
RV
DD
Signal Description:
Receive Analog Positive Supply
Signal Type:
Supply
3.3V ±5%. Should be tied to the DV
DD
and TV
DD
pins.
Signal Name:
TV
DD
Signal Description:
Transmit Analog Positive Supply
Signal Type:
Supply
3.3V ±5% Should be tied to the RV
DD
and DV
DD
pins.
Signal Name:
DV
SS
Signal Description:
Digital Signal Ground
Signal Type:
Supply
Should be tied to the RV
SS
and TV
SS
pins.
Signal Name:
RV
SS
Signal Description:
Receive Analog Signal Ground
Signal Type:
Supply
0.0V. Should be tied to DV
SS
and TV
SS
.
Signal Name:
TV
SS
Signal Description:
Transmit Analog Signal Ground
Signal Type:
Supply
0.0V. Should be tied to DV
SS
and RV
SS
.