SI3200-KS - Dual Programmable CMOS SLIC | Skyworks
MPN: SI3200-KS ✗ End of LifeSI3200-KS Overview
A Subscriber Line Interface Concept, or SLIC, is an integrated line-interface circuit used in customer-premise equipment. It forms the analog signaling path between a telephone line and the equipment codec or voice-processing electronics. In the product hierarchy, a SLIC is a specialized telecom interface IC: it sits above general-purpose transceivers and codecs while providing the line-specific voltage, current, ringing, and supervision functions required by analog telephone networks.
The SI3200-KS provides two SLIC channels in one package, reducing board area compared with separate single-channel implementations. Its software-programmable parameters allow an equipment designer to configure ringing frequency, line impedance behavior, and other interface characteristics through the control system. Internal balanced ringing to 65 Vrms supports telephone-line signaling without requiring a separate balanced-ringing circuit for every channel.
The device emphasizes low standby power, with the manufacturer data describing consumption below 65 mW per channel. This characteristic is relevant in customer-premise equipment that may remain connected to a telephone line while the user is not actively making a call. Consolidation into one dual-channel IC can also reduce package count, although actual board savings still depend on the surrounding protection, isolation, codec, and magnetics arrangement.
Typical uses include analog telephone adapters, voice gateways, customer-premise line cards, and other dual-channel voice terminals. A complete voice terminal still requires supporting components such as a speech codec, line protection, isolation components, and the appropriate external line circuitry. The SI3200-KS therefore occupies the line-interface portion of the design rather than replacing the codec or the entire telephone front end.
When designing around the SI3200-KS, verify the complete external line interface against the manufacturer’s recommended schematic and component values. Pay particular attention to line-voltage and ringing limits, external protection, grounding, and the relationship between programmed line parameters and the codec interface. The verified source material does not provide a complete pin list, so board-level pin assignment must be checked against the manufacturer documentation rather than inferred from the distributor description.
This product page consolidates verified distributor information, a source-backed technical description, practical application guidance, and a structured comparison of the available same-family references. It distinguishes confirmed facts from parameters that still require direct verification from the full manufacturer datasheet, helping engineers evaluate the obsolete SI3200-KS without relying on ambiguous cross-reference listings alone.
Drop-in alternatives for SI3200-KS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
SI3200-G-GS
✅ Drop-In📋 Reference alternative (not in catalog)
SI3200-G-GSR
✅ Drop-In📋 Reference alternative (not in catalog)
SI3200-KS Specifications
| Device Type | Subscriber Line Interface Concept (SLIC), codec interface |
| Channel Count | 2 channels |
| Process Technology | CMOS |
| Programmability | Software-programmable parameters |
| Standby Power Consumption | <65 mW per channel |
| Internal Balanced Ringing | Up to 65 Vrms |
| Linefeed Voltage | 100 V maximum |
| Primary Application | Customer premise equipment |
| Interface Category | Telecom interface IC |
| Package Type | 16-pin SOIC |
| Mounting Type | Surface mount |
SI3200-KS 16-pin soic Pin Configuration Guide
Pin configuration for SI3200-KS (16-pin soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SI3200-KS.
Refer to the datasheet for full pin configuration.
Typical Applications
SI3200-KS is suitable for 6 applications: Dual-Channel Analog Telephone Adapter, Customer-Premise Voice Terminal, Voice-over-IP Line Card, Analog Fax and Data Terminal, Small Business PBX Line Module, Telephone Line Test and Monitoring Equipment.
Dual-Channel Analog Telephone Adapter
The SI3200-KS fits a dual-line customer-premise adapter because it combines two programmable CMOS SLIC channels in one 16-pin SOIC package. Each channel can support telephone-line signaling, while internal balanced ringing reaches 65 Vrms and standby power is below 65 mW per channel. The device reduces the number of separate line-interface ICs required for a two-line terminal. Designers should pair it with a compatible codec, external protection, and the manufacturer-recommended line network, then validate ring cadence and line-state behavior in the intended telephone network.
Recommended
Customer-Premise Voice Terminal
A voice terminal can use the SI3200-KS to implement two telephone-line front ends in a compact surface-mount design. Its software-programmable line parameters let the host controller adapt ringing frequency and line behavior, while the 65 Vrms internal balanced-ringing capability addresses the high-voltage signaling requirement. The 16-pin SOIC package also simplifies PCB assembly relative to two discrete line-interface circuits. Final qualification must include off-hook, on-hook, ring-voltage, surge, and codec-interoperability testing under the target network conditions.
Recommended
Voice-over-IP Line Card
The SI3200-KS is appropriate for a voice-over-IP line card that bridges one or two analog telephone lines to digital packet processing. It handles the line-side analog interface, including line monitoring and balanced ringing to 65 Vrms, while the codec and voice processor perform speech conversion and packetization. Standby consumption below 65 mW per channel is useful in CPE where continuous line connection must coexist with low idle power. The line card still requires isolation, protection, a compatible codec, and country-specific ringing and impedance configuration.
Recommended
Analog Fax and Data Terminal
The SI3200-KS can support legacy fax or modem terminals where an analog telephone-network connection is required alongside voice features. Two integrated SLIC channels permit dual-line or line-plus-fax arrangements when supported by the associated codec and system software. Programmable line behavior is valuable because ringing and impedance characteristics can differ between networks, and the internal balanced-ringing output reaches 65 Vrms. Engineers should verify the complete operating modes against the obsolete device documentation and conduct real-line testing before production use.
Recommended
Small Business PBX Line Module
A compact PBX line module can use the SI3200-KS for dual analog subscriber-line endpoints. Each channel provides the subscriber line interface, monitoring, and programmable ringing behavior needed by an on-hook terminal. Packaging both channels into a 16-pin SOIC supports denser line cards than separate single-channel SLICs, while standby power below 65 mW per channel limits consumption from continuously connected lines. Thermal and regulatory testing must account for the linefeed circuitry, ringing energy, isolation components, and the number of channels populated on each module.
Recommended
Telephone Line Test and Monitoring Equipment
The SI3200-KS can serve in telecom test equipment that needs programmable line-state behavior and monitoring rather than only passive line access. Two channels allow simultaneous testing of two subscriber lines, while software programmability supports controlled ringing and operating-state changes during diagnostic sequences. Its standby consumption below 65 mW per channel helps limit thermal load in multi-channel test systems. The design must still add safe, high-voltage line protection, measurement circuitry, and isolation before it connects directly to external telephone lines.
Recommended
Engineering reference data for SI3200-KS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI3200-G-GS | SI3200-G-GSR |
|---|---|---|---|
| Package | SOIC-16 | SOIC-16 | SOIC-16 with exposed pad |
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Channel Count | 2 channels | 2 channels | 2 channels |
| Programmability | Software-programmable parameters | Software-programmable parameters | Software-programmable parameters |
Key Differentiators
- Higher listed linefeed voltage than the SI3200-G-GS reference (vs SI3200-G-GS)
- Explicit dual-channel line monitoring in the verified product description (vs SI3200-G-GSR)
- Documented low standby consumption (vs SI3200-G-GS)
- Broader voltage margin than the fixed 3.13 V SI3200-G-GSR comparison entry (vs SI3200-G-GSR)
Design Notes
The confirmed standby-power figure is below 65 mW per channel, but it must not be used as the package’s maximum active dissipation. Estimate worst-case dissipation using the core supply, active-channel current, codec load, and the thermal environment. Confirm the actual operating-current limits and exposed-pad requirements from the complete datasheet before sizing copper or making an obsolete-part procurement decision.
Keep the SI3200-KS away from unprotected external line nodes and place all protection, isolation, filtering, and ringing components according to the manufacturer reference schematic. The 16-pin SOIC is not a complete line interface, so incorrect placement between the SLIC and telephone line can expose the IC to transients beyond its 100 V linefeed rating. Review creepage, clearance, grounding, and surge-current paths during PCB signoff.
Do not treat the SI3200-G-GS or SI3200-G-GSR comparison entries as automatic drop-in replacements. The published summaries show a 99 V versus 100 V maximum-voltage difference for SI3200-G-GS and a fixed 3.13 V, 45 mA, exposed-pad configuration for SI3200-G-GSR. Verify pin names, programming registers, codec timing, line current, ringing limits, and the PCB land pattern before substitution.
Because the SI3200-KS is associated with an obsolete lifecycle indication, preserve the exact manufacturer ordering code, package marking, and firmware configuration for any remaining production or repair demand. Avoid mixing SI3200 family members solely by the base name. Document the external circuitry and firmware settings alongside each board revision so that a future replacement can be evaluated against the full hardware-software interface rather than the distributor category description alone.
Compliance Information
The supplied excerpts do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for SI3200-KS. A comparison-page RoHS field is present but not accompanied by a clear verified status, so it is not treated as evidence of compliance.