Wideband FXS, ISI interface, parametric MLT, customer-specific

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ProSLIC® Single-Channel FXS Solutions

The Si32192 Single FXS ProSLIC® devices implement a complete foreign exchange station (FXS) telephony interface solution in a single package that conforms to all relevant global specifications. The Si32192 ProSLIC ICs operate from a 3.3 V supply and have a 3-wire ISI digital interface with 1.8 to 3.3 V I/O. The Si32192 devices are designed to operate with a capacitive boost tracking battery supply for lower power, cost, and footprint than other tracking supplies in the industry. Self-testing and metallic loop testing (MLT) are facilitated by the built-in DSP, monitor ADC, and test load. The devices are available with wideband audio for better-than-PSTN voice quality and DTMF detection.

The Si32192 devices are available in a 4 x 6 mm, 38-pin QFN package.

• VoIP Gateways and Routers
• Optical Network Terminals/Units (ONT/U)
• Analog Terminal Adapters (ATA)
• Cable eMTA
• Wireless Fixed Terminals (WFT)
• Wireless Local Loop (WLL)

Symmetry Electronics is an authorized Silicon Labs distributor.


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Complete FXS solution in a single 4 x 6mm package
Performs all BORSCHT functions
Ideal for short- or medium-loop applications
Ultra-low power consumption
Patented low-power ringing
Adaptive ringing
Dynamic overhead control
Ringing current limiting
Simplified configuration and diagnostics
Supported by ProSLIC API
Audio diagnostics with loopback
Integrated test load
Global programmability
Wideband voice support
On-hook transmission
Loop or ground start operation
Smooth polarity reversal
A-Law/-Law companding, linear PCM
Flexible integrated tracking dc-dc controller supporting patent-pending low-cost capacitive boost configuration
Software-programmable parameters:
Ringing frequency, amplitude, cadence, and waveshape
Two-wire ac impedance
Transhybrid balance
DC current loop feed (1045 mA)
Loop closure and ring trip thresholds
Ground key detect threshold
Pulse metering
DTMF generation
DTMF detection (Si32193)
3.3 V operation
Support for 1.8 V I/O
Maximum battery up to 100 V
Pb-free/RoHS-compliant packaging
3-wire Integrated Serial Interface (ISI)


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