Silicon Labs Single-Chip Dual ProSLIC® Si32260

The Si3226x Dual ProSLIC® devices, in a single package, implement two complete foreign exchange station (FXS) telephony interfaces. The Si3226x devices operate from a 3.3 V supply. The Si32260/1 have standard PCM/SPI or GCI bus digital interfaces, while the Si32266/7/8/9 devices use Silicon Labs' proprietary three-wire digital Integrated Serial Interface (ISI).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 Si32266/7 devices are designed to operate with a tracking battery supply for each channel for lowest power consumption. The Si32268/9 devices use shared battery supplies for lowest cost, with an internal dc-dc controller that operates in Tracking Shared Supply (TSS) mode to deliver power consumption lower than typical fixed voltage shared rail designs. The Si32260/1 devices operate with either power source.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 (Si32260/6/8) or -140 V (Si32261/7/9) 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 mm x 8 mm 60-pin QFN package. All Si32266/7/8/9 devices are available in a 6 mm x 8 mm 50-pin QFN package