●Description
●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 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. 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 8 x 8 mm 60-pin QFN package.
●Si32260/61 Features
●Two complete FXS channels in 8 x 8 mm
●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
●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
●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
