7 supply pins – Maxim Integrated DS21Q55 User Manual

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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:

Signal Description:

Digital Positive Supply

Signal Type:

Supply

3.3V ±5%. Should be tied to the RV

and TV

pins.

Signal Name:

Signal Description:

Receive Analog Positive Supply

Signal Type:

Supply

3.3V ±5%. Should be tied to the DV

and TV

pins.

Signal Name:

Signal Description:

Transmit Analog Positive Supply

Signal Type:

Supply

3.3V ±5% Should be tied to the RV

and DV

pins.

Signal Name:

Signal Description:

Digital Signal Ground

Signal Type:

Supply

Should be tied to the RV

and TV

pins.

Signal Name:

Signal Description:

Receive Analog Signal Ground

Signal Type:

Supply

0.0V. Should be tied to DV

and TV

Signal Name:

Signal Description:

Transmit Analog Signal Ground

Signal Type:

Supply

0.0V. Should be tied to DV

and RV