Embedded DAAs

The Silicon Labs Si3056 and Si306x ICs are integrated silicon Direct Access Arrangement (DAA) products. The Si3056 IC offers a DSP-compatible Synchronous Serial Interface (SSI) enabling global compliance through a programmable telephone line interface. The Si306x family includes line-side devices for use with third-party processors that contain an integrated Silicon Labs’ DAA interface. 

Offered as a chipset with either the Si3018 global line-side device or the Si3019 enhanced global line-side device, the Si3056 IC is fully programmable for ac and dc termination, ringer impedance and ringer threshold. The Si3056 chipset also supports billing tone detection, on- and off-hook polarity reversal detection and pulse dialing, enabling it to meet the most stringent global PTT requirements. Other enhanced features include on and off-hook parallel phone detection, overcurrent protection, ring validation, higher transmit/receive levels (up to +3.2 dBm), finer resolution gain control (gain or attenuation adjustments in steps as small as 0.1 dB), and a programmable hybrid.   



  • Globally-compliant with FCC, NET4, CTR21, JATE and country-specific PTT specifications
  • Type I and Type II caller ID support
  • Automatic overcurrent protection
  • Integrated ring detection and validation including programmable ring threshold
  • Pulse dialing support
  • Over 6000 V isolation with standard capacitors
  • On/off-hook line voltage monitoring (1 V/bit) for parallel handset/valid line detection
  • Off-hook loop current sensing
  • Selectable terminations (up to 16 ac and 3 dc)
  • 8-tap programmable hybrid filter to optimize near-end echo cancellation (Si3056 only)
  • 16-bit codec with 84 dB dynamic range
  • ± 12 dB transmit/receive gain or attenuation with step resolution of 0.1 dB (Si3056 only)
  • Up to +6.0 dBm transmit/receive levels
  • Polarity reversal detection

Product Matrix

Part Number Data Sheet Package Type Host Interface Region Line Voltage Monitor BOM Components AC Termination Settings
SOIC16; SOIC16 + SOIC8 SSI Global Yes 32 4; 16
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