SKYWORKS SI32261-C-ZM2

Software-programmable parameters:

• Ringing frequency, amplitude, cadence, and waveshape
• Two-wire ac impedance
• Transhybrid balance
• DC current loop feed (10–45 mA)
• Loop closure and ring trip thresholds
• Ground key detect threshold
• Integrated dc-dc controllers with direct connection to MOSFET
• Three high voltage supply options
  • Full tracking
  • Tracking shared supplies
  • Fixed rail
• DTMF generator/decoder
• A-Law / μ-Law companding, linear PCM
• GCI/IOM-2 mode support
• 3.3 V operation
• Pb-free/RoHS-compliant packaging

The Si32260/1 Dual ProSLIC devices, in a single package, implement two complete foreign exchange station (FXS) telephony interfaces. The Si32260/1 devices operate from a 3.3 V supply and have standard PCM/SPI or GCI (8x8 mm package only) bus 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 Si32260/1 devices are designed to operate not only with a tracking battery supply for each channel for lowest power consumption, but also with shared battery supplies, for lowest cost. When used with shared battery supplies, the internal dc-dc controller operates in Tracking Shared Supply (TSS) mode to deliver power consumption lower than typical fixed voltage shared rail designs (shared supplies are not currently supported by the 6x8 mm package option).

Self-testing and metallic loop testing (MLT) (e.g., GR-909) is facilitated by the built-in DSP, monitor ADC, and test load. The devices are available with linefeed voltage ratings of –110 V (Si32260) or –140 V (Si32261) to support high voltage ringing, and both devices support wideband audio for better-than-PSTN voice quality. The Si32260/1 devices are available in a 6x8 mm 47-pin QFN package or an 8x8 mm 60-pin QFN package.

• Two complete FXS channels in a single 6x8 mm or 8x8 mm package
• Performs all BORSCHT functions
• Ideal for short- or long-loop applications
• Ultra low power consumption
• Internal balanced or unbalanced ringing
• Patented low power ringing
• Adaptive ringing
• Simplified configuration and diagnostics
  • Supported by ProSLIC API
  • GR-909 loop diagnostics
  • Audio diagnostics with loopback
  • Integrated test load
• Wideband voice support
• On-hook transmission
• Loop or ground start operation
• Smooth polarity reversal
• Pulse metering
• PCM and SPI bus digital interfaces with programmable interrupts

• 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