Hot-selling and scarce SI32260-C-FMR Telecom IC Subscriber Line Interface Concept, CODEC 60-QFN

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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 6 x 8 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 6 x 8 mm 47-pin QFN package or an 8 x 8 mm 60-pin QFN package.

Product Features

 Two complete FXS channels in a single 6 x 8 mm or 8 x 8 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

 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

Product 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

Product Specification

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