Si3218x Next Generation Single-Channel ProSLIC®

The new flagship Si3218x single-channel ProSLIC subscriber line interface circuit (SLIC) devices deliver the lowest power consumption, smallest footprint, 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 controller, patented low-power ringing (LPR), and a very low-power on-hook mode. PCM/SPI and our three-wire integrated serial interface (ISI) options are supported.

QFN package
5 x 6 mm
Host interface

Si3218x Common Specs

  • Single-chip single-channel FXS solution
  • 5 mm x 6 mm or 6mm x 6mm 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)
  • Patented low-power ringing
  • PCM/SPI (Si32184/5) or three-wire ISI (Si32182/3) host interface options
  • 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 (Si32183/5)
  • DTMF generation
  • Pulse metering
  • -106 V Max Vbat
  • 3.3 V operation
  • 1.8 V or 3.3 V I/O without level shifters
Find the Right Si3218 Single-Channel 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 1 0 -106 LCCB QFN36 5x6
ISI 1 0 -106 LCCB QFN36 5x6
PCM/SPI 1 0 -106 LCCB QFN40 6x6
PCM/SPI 1 0 -106 LCCB QFN40 6x6

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*LCCB (Low-Cost Capacitive Boost)

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