The Si3228x Dual ProSLIC® devices, in a single package, implement two complete foreign exchange station (FXS) telephony interfaces. The Si3228x devices operate from a 3.3 V supply and have standard PCM/SPI or 3-wire ISI digital interfaces. A pair of built-in dc-dc converter controllers can be used to automatically generate the optimal battery voltage required for each line-state, optimizing efficiency and minimizing heat generation. The Si3228x devices are designed to operate with capacitive boost tracking battery supply for lower power, cost, and footprint vs. other tracking or shared battery supplies in the industry. Self-testing and metallic loop testing (MLT) is facilitated by the built-in DSP, monitor ADC, and test load. The devices are available with wideband audio for better than PSTN voice quality, DTMF detection, and Smart Ringing. Smart Ringing reduces the peak current with 2-channel ringing for lower-cost ac-dc adapters. The Si3228x devices are available in a 7 x 7 mm 48-pin QFN or 8 x 8 mm 56-pin QFN package.Applications:• VoIP gateways and routers• xDSL IADs• Optical Network Terminals/Units (ONT/U)• Analog Terminal Adapters (ATA)• Cable eMTA• Wireless Fixed Terminals (WFT)• Wireless Local Loop (WLL)• WiMAX CPE• Private Branch Exchange (PBX)• VoIP MDU gateways 9icnet Electronics is an authorized Silicon Labs distributor.
Feature
- Single-chip dual-channel FXS solution
- 7 mm x 7 mm or 8 mm x 8 mm QFN package enables small board area
- Patent-pending low-cost capacitive boost tracking dc-dc controller
- Reduced BOM cost vs. other tracking or shared supplies in the industry
- Ultra-low power consumption (50mW on hook per channel)
- Patented low-power ringing
- Reduced BOM cost vs. other tracking or shared supplies in the industry
- Smart ringing reduces peak current with 2 channel ringing (Si32284/5/6/7)
- Global programmability
- Simplified configuration and diagnostics supported by ProSLIC API
- Ringing frequency, amplitude, cadence, and waveshape
- Transhybrid balance
- DC current loop feed (10–45 mA)
- Loop closure and ring trip thresholds
- Ground key detection threshold
- Integrated test load
- Wideband voice support
- On-hook transmission
- Loop or ground start operation
- DTMF detection option (Si32181/3/5/7)
- DTMF generation
- Pulse metering
- -106 V Max Vbat
- 3.3 V operation
