PBL3798-2 - Ericsson

PBL3798-2 Subscriber Line Interface Circuit

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. T.

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
• Line terminating impedance, complex or real, set by a simple external network
• Hybrid function with conventional or programmable CODEC/filters
• 70 dB longitudinal to metallic balance RINGRLY 6.