KEY FEATURES

• Two complete FXS channels in a single

8x8 mm package

• Performs all BORSCHT functions

• Ultra-low power consumption

• Patented low-power ringing

• Patented Smart Ringing option

• Reduces peak current with 2-channel

ringing (Si32295/7)

• Adaptive ringing

• Simplified configuration and diagnostics

• Supported by SimpleVoice API

• Audio diagnostics with loopback

• Integrated test load

• Wideband voice support

• On-hook transmission

• Loop or ground start operation

• Smooth polarity reversal

• Programmable interrupts

• Software-programmable parameters:

• Ringing frequency, amplitude, cadence,

and waveshape

• Two-wire ac impedance

• Transhybrid balance

• DC current loop feed (10–45 mA)

• Loop closure and ring trip thresholds

• Ground key detect threshold

• Flexible integrated tracking DC-DC

controller supporting patented low-cost

capacitive ultra-boost configuration

• DTMF Generation

• DTMF Detection (Si32291/3/5/7)

• 3-wire Integrated Serial Interface (ISI) or

PCM interface

• A-Law/μ-Law companding, linear PCM

• Pulse metering

• 3.3 V operation

• Pb-free/RoHS-compliant packaging