Description

The PBL 386 50/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Central Office Metering applications and other telecommunications equipment. The PBL 386 50/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.

Key Features

• 24-pin SSOP package

• Programmable two-wire signal headroom for 2.2 V rms metering

• High and low battery with automatic switching

• Only +5 V feed in addition to battery

• Selectable transmit gain (0.5x or 0.25x)

• 70 mW on-hook power dissipation in active state

• On-hook transmission

• Long loop battery feed tracks Vbat for maximum line voltage

• No power-up sequence

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

• Constant loop voltage for line leakage 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