PBL38620-2

Subscriber Line Interface Circuit

Description

The PBL 386 20/2 Subscriber Line Interface Circuit SLIC is a 90 V bipolar integrated circuit for use in PBX,Terminal adapters and other telecommunications equipment. The PBL 386 20/2 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

• 60 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

• 44V open loop voltage @ -48V battery feed

• Full longitudinal current capability during on-hook state

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

• Integrated Ring Relay driver

• Ground key detector

• Programmable signal headroom