SLIC 2CH 60dB 3.3V 60Pin QFN EP
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