Description
The Si3233 ProSLIC® is a low-voltage CMOS device that provides a multi-functional subscriber line interface ideal for customer premise equipment (CPE) applications. The ProSLIC integrates subscriber line interface circuit (SLIC) and battery generation functionality into a single CMOS integrated circuit. The integrated battery supply continuously adapts its output voltage to minimize power and enables the entire solution to be powered from a single 3.3 V (Si3233M only) or 5 V supply. The ProSLIC controls the phone line through Silicon Labs’ Si3201 Linefeed IC or discrete circuitry.

Features
■ Software Programmable SLIC with codec interface
■ Software programmable internal balanced ringing up to 90 VPK (5 REN up to 4 kft, 3 REN up to 8 kft)
■ Integrated battery supply with dynamic voltage output
    • On-chip dc-dc converter continuously minimizes power in all operating modes
    • Entire solution can be powered from a single 3.3 V or 5 V supply
    • 3.3 V to 35 V dc input range
    • Dynamic 0 V to –94.5 V output
■ Software programmable linefeed parameters:
    • Ringing frequency, amplitude, cadence, and waveshape
    • 2-wire ac impedance
    • constant current feed (20 to 41 mA)
    • Loop closure and ring trip thresholds and filtering
■ Software programmable signal generation and audio processing:
    • Phase-continuous FSK (caller ID) generation
    • Dual audio tone generators
    • Smooth and abrupt polarity reversal
■ Extensive test and diagnostic features
    • Realtime dc linefeed measurement
    • GR-909 line test capabilities
■ SPI control interface
■ Extensive programmable interrupts
■ 100% software configurable global solution
■ Lead-Free and RoHS-compliant

Applications
■ Interface to Broadcom devices
    • BCM11xx residential gateway
    • BCM3341 VOIP processor
    • BCM33xx cable modem
■ Voice over IP
■ Terminal adapters
■ Fixed cellular terminal