Silicon Laboratories Inc. launched the industry’s most integrated, cost-effective and power-efficient Subscriber Line Interface Circuit (SLIC) for VoIP Gateways. The new Si3226x Dual ProSLIC family delivers the smallest bill of materials and board area and the lowest power consumption of any dual SLIC available. The Si3226x family provides an ideal solution for low-channel-count VoIP customer premises equipment (CPE) such as Fiber-to-the-Home (FTTH) gateways, DSL integrated access devices and cable embedded multimedia terminal adaptors (EMTAs), as well as high-channel-count products including multiple-dwelling-unit gateways and PBX systems.

Subscriber Line Interface Circuit (SLIC) for VoIP GatewaysAccording to Global Industry Analysts, Fiber-to-the-Home (FTTH) deployment is expected to reach 183.9 million subscribers by 2015, with more than 80 percent of the roll-out occurring in Asia. The need for higher bandwidth to support IPTV and video-on-demand services, growing demand for bundled voice/data/video services and aggressive plans to upgrade copper networks to fiber-optic cable are driving the growth of the FTTH gateway market. Silicon Labs’ Si3226x Dual ProSLIC family is designed to help reduce the cost and complexity of these gateways.

FTTx and other VoIP gateway manufacturers are challenged to fit all the functionality demanded by subscribers into small, inexpensive system designs. The Si3226x SLICs address this challenge by providing two complete channels in a tiny 60-pin 8 mm x 8 mm QFN package. The tiniest dual foreign exchange station (FXS) solution available, the Si3226x devices enable the lowest BOM cost and smallest footprint per channel for multiline gateways, even smaller than some quad- and octal-channel FXS solutions.

The Si3226x family sets a new benchmark in minimizing total FXS system power consumption, requiring less than 55 mW per channel when on-hook, making the Dual ProSLIC devices an ideal solution as telecommunication service providers and governments mandate more energy-efficient electronic products. The on-chip intelligent dc-dc converters optimize energy efficiency by generating only the voltages needed in on-hook, off-hook and ringing states. Ultra-low power consumption makes it easier to meet green energy requirements such as the European Commission’s Code of Conduct on Power Consumption for Broadband Equipment; enables longer battery standby time in battery-backed designs; and reduces heat dissipation, eliminating the need for fans in multiline gateway designs, further reducing system cost.

Silicon Labs provides software and reference design support to accelerate time to market and simplify Si3226x-based designs. The ProSLIC API, a common software library for the entire ProSLIC portfolio, eliminates the need to develop system-specific software drivers for ProSLIC devices. To allow system designers to optimize the tradeoff between cost and power consumption, the Si3226x evaluation boards support multiple dc-dc converter options. To further ease design challenges, reference design hardware and software support is available from leading vendors of system-on-chip (SoC) solutions for VoIP gateway equipment.