​Si3220/25/32 Dual ProSLIC

Note: Si3220/25/32 devices are not recommended for new designs. Please use the Si32260/61 devices instead.
​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.
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.
 
 

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

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
Note: Si3220/25/32 devices are not recommended for new designs. Please use the Si32260/61 devices instead.

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Schematics/Layout (6)

DescriptionVersionUpdatedSize
Si3220KIT4-EVB
1729 kB
Si3220PPTO-EVB
5550 kB
Si3220PPTX-EVB
5772 kB
Si3225KIT4-EVB
1572 kB
Si3225PPT0-EVB
5392 kB
Si3225PPTX-EVB
5615 kB
Note: Si3220/25/32 devices are not recommended for new designs. Please use the Si32260/61 devices instead.
Product Matrix
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Part NumberISI# FXS Channel# FXO ChannelMax V BatteryWidebandDTMF DetectionPulse MeteringTracking dc-dcShared dc-dcDaisy-chain ModePackage TypePackage Size
Si3220NoNoYesYesNoNoNo
Si3225NoNoYesNoNoNoNo
Si3232NoNoNoYesNoNoNo
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 ICs operate from a single 3.3 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 ICs are packaged in a 64-pin TQFP, and the Si3200 is packaged in a thermally enhanced 16-pin SOIC.

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