SI3050-KT

Telecom Overview

The Skyworks Solutions Si3050-KT is a system-side component of the Si3050+Si3011/18/19 Voice DAA chipset, designed as a highly programmable foreign exchange office (FXO) analog interface. It operates on a 3.3 V digital supply and interfaces directly to standard telephony PCM or GCI highways. The device integrates an 80 dB dynamic range codec, µ-law/A-law companding, and a 2- to 4-wire analog hybrid. Utilizing patented isolation capacitor technology, it provides over 5000 V isolation without transformers. Key electrical parameters include a loop current range of 10–120 mA, ring detect voltages from 13.5 to 49.5 V rms, and transmit/receive levels configurable at +6 dBm or +3.2 dBm.

Telecom Feature Summary

• Patented isolation capacitor technology eliminates the need for costly isolation transformers, relays, or opto-isolators while providing superior surge immunity.
• Integrated codec with programmable digital gain in 0.1 dB increments and support for both µ-law and A-law companding standards.
• Supports parallel handset detection, polarity reversal detection, and Type I and II caller ID signaling.
• Features programmable line interface capabilities including AC/DC termination, ringer impedance adjustment, and overload detection.

Telecom Applications

• DSL Integrated Access Devices (IADs)
• VoIP gateways
• PBX and IP-PBX systems
• Voice mail systems
• DECT base stations

Telecom Procurement Notes

Verify that the ordering suffix corresponds to the specific package type required for your design, such as TSSOP or QFN. Confirm the temperature grade matches your operational environment, as F-grade covers 0 to 70 °C and G-grade extends to -40 to 85 °C. Ensure the component is RoHS compliant and lead-free if required by your manufacturing standards. Cross-reference the datasheet revision to confirm pinout compatibility with existing layouts.

Telecom Selection Notes

Select the Si3050-KT when designing FXO interfaces that require high integration and global compliance. This component pairs with line-side devices like the Si3011, Si3018, or Si3019 to complete the DAA solution. Consider the thermal resistance characteristics of the chosen package, such as 84 °C/W for TSSOP-20 or 67 °C/W for QFN-24, during thermal management planning. Verify that the host processor supports the required SPI control interface or PCM/GCI highway protocols.

Telecom Part Context

The Si3050 serves as the system-side controller within the Silicon Laboratories Si3050+Si3011/18/19 Voice DAA chipset family. It is engineered to replace traditional discrete transformer-based FXO designs with a compact, software-configurable alternative. The chipset architecture separates the high-voltage line interface functions into the companion Si301x series devices, allowing the Si3050 to focus on signal processing and control logic.

Telecom Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.