Si3228x Dual-Channel ProSLIC®

The Si3228x dual-channel ProSLIC subscriber line interface circuit (SLIC) devices deliver the lowest power consumption, highest level of programmability, and lowest cost bill of materials in the industry. Unmatched power efficiency is achieved using patented on-chip intelligent dc-dc controllers, patented low-power ringing (LPR), a very low-power on-hook mode, and energy-friendly smart ringing that can save power adapter cost in two channel applications. A selectable digital interface enables the system architect to interface with the SoC via a standard PCM/SPI digital interface or our three-wire integrated serial interface (ISI).

Dual FXS
For cost-optimized gateways
Host interface
PCM/SPI or ISI

Si3228x Common Specs

  • Single-chip dual-channel FXS solution
  • 7x7 mm or 8x8 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
  • 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
Find the Right Si3228x Device Select Columns
Select Columns
Part Number Host Interface # FXS Channel # FXO Channel Max V Battery Wideband DTMF Detection Pulse Metering Daisy-chain Mode Smart Ringing dc-dc Options * Package Type Package Size (mm)
ISI 2 0 -106 LCCB QFN48 7x7
ISI 2 0 -106 LCCB QFN48 7x7
PCM/SPI 2 0 -106 LCCB QFN56 8x8
PCM/SPI 2 0 -106 LCCB QFN56 8x8
ISI 2 0 -106 LCCB QFN48 7x7
ISI 2 0 -106 LCCB QFN48 7x7
PCM/SPI 2 0 -106 LCCB QFN56 8x8
PCM/SPI 2 0 -106 LCCB QFN56 8x8

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*LCCB (Low-Cost Capacitive Boost)

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