Description

The PBL 386 40/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment. The PBL 386 40/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.

Key Features

• 24-pin SSOP package

• High and low battery with automatic switching

• 65 mW on-hook power dissipation in active state

• On-hook transmission

• Long loop battery feed tracks Vbat for maximum line voltage

• Only +5 V feed in addition to battery

• Selectable transmit gain (1x or 0.5x)

• No power-up sequence

• Programmable signal headroom

• 43V open loop voltage @ -48V battery feed

• Constant loop voltage for line leakage

  <5 mA (RLeak ~ >10 kΩ@ -48V)

• Full longitudinal current capability during on-hook state

• Analog over temperature protection permits transmission while the protection circuit is active

• Line voltage measurement

• Polarity reversal

• Ground key detector

• Tip open state with ring ground detector

• -40°C to +85°C ambient temperature range