描述 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.

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