Product Matrix

Dual ProSLIC®

Si3220/25/32 SLIC
The Dual ProSLIC is a low power subscriber line interface circuit (SLIC) solution that integrates two SLICs and two codecs into a tiny CMOS IC to provide the smallest and lowest cost dual-channel analog telephone interface.

Block Diagram

 

Features

Software programmable parameters for global compliance with one hardware design:
Constant current loop feed (18–45 mA)
Two-wire ac impedance
Transhybrid balance
Ringing frequency, amplitude, cadence
Loop closure and ring trip thresholds
Ground key detection threshold
Low standby power consumption: <65 mW
Loop start and ground start support
Automatic switching of up to three batteries
DTMF generation and decoding
Modem/fax tone detection
Internal ringing up to 65 V RMS (Si3220)
12/16 kHz pulse metering (Si3220)
FSK (caller ID) tone generation
PCM/SPI or GCI digital interfaces

Applications

Ideal for applications up to 18,000 feet
CO/DLC line cards
PBX/key telephone systems
Cable telephony systems
Voice over IP/Voice over DSL systems
Pair gain remote terminals

Technologies

Performs all battery, overvoltage, ringing, supervision, coding, hybrid and test (BORSCHT) functions per LSSGR and ITU standards
Programmable ringing relay control and ring trip detection for centralized ringing architectures (Si3225)
 Integrated GR-909 subscriber line diagnostics, programmable audio diagnostics filters and multiple analog/digital loopback test modes

Resources

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Design Tools
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Product Matrix

Part NumberAvailable DocumentsChannelsIntegrated SLIC and CodecIntegrated High Voltage Line FeedInternal RingingExternal RingingDC/DC ConverterDTMF DecoderPulse MeteringFXO System Side DAALine DiagnosticsWideband 
Si3220Data SheetDualYesUses Si320xYes––YesYesN/AYes–
Si3225Data SheetDualYesUses Si320x–Yes–Yes–N/AYes–
Si3232Data SheetDual–Uses Si3200Yes–––YesN/AYesYes (Using external wideband codec)

 

Fully programmable parameters allow global compliance using a single hardware solution and on-chip functions such as DTMF generation/decoding, FSK caller ID generation and modem tone detection help eliminate external DSP requirements. Integrated test and line monitoring allows remote subscriber loop and line card diagnostics without centralized test equipment. The Si3220 provides programmable internal ringing generation for space-constrained CPE applications and the Si3225 includes internal ringing relay drivers and ring trip detection to minimize external components in traditional access applications. The Si3220 and Si3225 operate from a single 3.3 V or 5 V supply and interface directly to standard PCM/SPI or GCI digital interfaces; all high voltage functions are performed using the Si3200 linefeed interface IC. The Si3220 and Si3225 are packaged in a 64-pin TQFP, and the Si3200 is packaged in a thermally-enhanced 16-pin SOIC.