PBL3798 Description
PBL 3798 is an analog Subscriber Line Interface Circuit (SLIC), which is fabricated in a 75 V bipolar, monolithic process. The programmable, constant current feed circuit incorporates a switch mode regulator to minimize on-chip power dissipation. A stand-by state further reduces idle power dissipation, while allowing the supervisory functions to be active.
PBL3798 Key Features
- On-chip switch mode regulator to minimize power dissipation
- Programmable, constant current feed
- Line feed characteristics independent of battery variations
- Tip-ring polarity reversal function
- Tip and ring open circuit state; tip open with ring active state
- Detectors
- programmable loop current/ring ground detector
- ground key detector
- ring trip detector
- Ring and test relay drivers