Wideband FXS with ISI interface

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Lead Time 6 weeks
Unit Price:$2.87
Minumum Qty: 2500
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The Si3218x devices are pin-compatible single-channel ProSLIC® products that implement a complete foreign exchange station (FXS) telephony interface solution in accordance with all relevant global specifications. The Si3218x ProSLIC ICs operate from a 3.3 V supply and interface to standard PCM/SPI or 3-wire ISI digital interfaces with 3.3 V or 1.8 V I/O. The Si3218x integrated dc-dc controller automatically generates the optimal battery voltages required for each linestate. Si3218x ICs are available with voltage rating of –106 V. The Si3218x devices are available in a 5x6 mm 36-pin QFN package and a 6x6 mm 40-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 5x6 mm or 6x6 mm package
Performs all BORSCHT functions
Ideal for short to medium loops
Global programmability
Patented low-power ringing
Simplified configuration and diagnostics
Supported by ProSLIC API
Audio diagnostics with loopback
Integrated test load
Ultra low power consumption
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 (Si32181/3/5)
3.3 V operation
Support for 1.8 V I/O
Maximum battery up to 106 V
Pb-free/RoHS-compliant packaging
Two digital interface options
3-wire Integrated Serial Interface (ISI) or PCM/SPI interface


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Wideband FXS with ISI interface
Part #: SI32182-A-GMR
Wideband FXS with ISI interface