SI3201-GS - Programmable CMOS SLIC with 90 V Ringing | Silicon Laboratories
N.º de pieza: SI3201-GS ✓ ActivoSI3201-GS Descripción general
A subscriber line interface circuit, commonly called a SLIC, is the analog front end used between a telephone line and a digital voice processor. In the broader hierarchy, a SLIC is a telephone interface IC, while the SI3201-GS additionally combines codec interfacing and battery or ringing generation in one programmable CMOS device. This integration can simplify board partitioning, but the system must still provide appropriate protection, isolation, line filtering, and hook-state interfaces around the chip.
Key features include software-programmable SLIC and codec behavior, internal balanced ringing rated to 90 VPK, an integrated battery supply with dynamic voltage output, and an on-chip DC-DC converter. The verified distributor data identifies a one-channel implementation with 60 dB channel isolation, approximately 41 mA operating current, a 3.13 V to 5.25 V supply range, and operation from -40°C to 85°C. The SI3201-GS also appears as a lead-free, 100 V linefeed interface option for use with Si321x-family companion devices.
Technically, the device combines a low-voltage CMOS signal path with high-voltage line functions. Its DC-DC converter provides tracking battery from a 3.3 V to 35 V input, allowing the caller-side supply to track line voltage while the core interface operates from a 3.3 V or 5 V rail. This separation between logic supply and line-feed input improves design flexibility, but it also requires careful validation of converter layout, protection paths, and thermal performance.
Typical applications include analog telephone adapters, voice-over-IP terminals, small PBX line cards, digital loopback or line-interface test equipment, and embedded voice systems that need programmable ringing and hook detection. In these systems, the SI3201-GS handles the physical line side while a DSP or system controller configures operating parameters through its digital interface.
Design consideration: the exposed pad must be connected to the recommended ground plane, and high-voltage ringing paths require validated creepage, clearance, protection components, and isolation boundaries. Telephone interfaces are safety-critical, so final circuit compliance depends on the complete product design rather than the IC alone.
This page consolidates verified distributor specifications, same-family drop-in candidates, comparison fields, and practical implementation guidance that are not presented together on a typical distributor listing.
Alternativas directas para SI3201-GS — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con SI3201-GS (mismo factor de forma y huella) — difiere en Battery Supply, Channel Count, Package.
SI3201-FSR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI3201-FS
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SI3201-GSR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SI3201-GS Especificaciones
| Product Type | Programmable CMOS SLIC with codec interface and ringing/battery voltage generation |
| Channel Count | 1 channel |
| Core Supply Voltage Range | 3.13 V to 5.25 V |
| Nominal Logic Supply Options | 3.3 V or 5 V |
| DC Input Range for Battery Generation | 3.3 V to 35 V |
| Balanced Ringing Voltage | Up to 90 VPK |
| Ringer Equivalence at 4 kft | 5 REN |
| Ringer Equivalence at 8 kft | 3 REN |
| Channel Isolation | 60 dB |
| Operating Current | 41 mA |
| Rango de temperatura de funcionamiento | -40°C to +85°C |
| Linefeed Interface Voltage | 100 V |
| Battery Supply | Integrated supply with dynamic voltage output |
| DC-DC Converter | On-chip converter with tracking battery from 3.3 V to 35 V input |
| Programmable Functions | Software-programmable SLIC and codec interface |
| Encapsulado | 16-pin SOIC exposed-pad package |
| Tipo de montaje | Surface mount |
| Lead-Free Status | Lead-free |
Guía de configuración de pines de SI3201-GS 16-pin soic exposed-pad package
Configuración de pines para SI3201-GS (encapsulado 16-pin soic exposed-pad package). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para SI3201-GS.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SI3201-GS es adecuado para 6 aplicacións: Voice-over-IP Telephone Terminal, Analog Telephone Adapter, Small PBX Line Card, Embedded Voice Processing System, Telephone Line Interface Test Equipment, Central Office Line Interface.
Voice-over-IP Telephone Terminal
The SI3201-GS fits a voice-over-IP terminal because it combines a one-channel programmable SLIC, codec interface, ringing generation, and battery supply in one 16-pin SOIC exposed-pad device. Its 90 VPK balanced ringing output supports conventional analog telephones, while the 3.13 V to 5.25 V core supply operates from 3.3 V or 5 V system rails. The separate 3.3 V to 35 V tracking-battery input adds design flexibility. A DSP can configure line behavior through the digital interface, reducing the number of discrete line-driver functions in the terminal. Protection and isolation remain mandatory because the ringing path reaches 90 VPK.
Recomendado
Analog Telephone Adapter
An analog telephone adapter can use the SI3201-GS as its subscriber line front end because the device provides programmable SLIC functions, a codec interface, on-hook battery generation, and balanced ringing in one package. The verified 90 VPK capability, 5 REN at 4 kft, and 3 REN at 8 kft ratings help engineers match ringing performance to the intended line load. Its approximately 41 mA summarized operating current and 3.3 V or 5 V core supply suit compact embedded systems. The board must still implement surge protection, ring-slew control, filtering, and the required telephone-network isolation barrier.
Recomendado
Small PBX Line Card
The SI3201-GS is appropriate for a compact PBX line card when one analog subscriber port is required per device. Its software-programmable SLIC and codec interface allow a common DSP or controller to configure line behavior across multiple cards, while the integrated DC-DC converter produces tracking battery from a 3.3 V to 35 V input. That separation can simplify power architecture compared with driving every line from a dedicated external battery supply. The 16-pin SOIC exposed-pad package simplifies routing, although exposed-pad grounding and ringing-path layout must follow the manufacturer recommendations.
Recomendado
Embedded Voice Processing System
The SI3201-GS can serve as the physical line interface in an embedded voice system that combines a modem, DSP, or application processor with an analog telephone connection. The device's one-channel architecture keeps each subscriber port independent, while programmable SLIC and codec behavior allows firmware to adapt to different network conditions. A 3.3 V or 5 V core supply supports embedded processing platforms, and the 3.3 V to 35 V battery-generation input permits a wider line-side source. Because the IC includes high-voltage ringing capability, layout must clearly separate the linefeed and logic domains and preserve the specified creepage and clearance.
Recomendado
Telephone Line Interface Test Equipment
The SI3201-GS can support telephone line-interface test equipment because its integrated ringing and battery functions allow the board to emulate subscriber-side line conditions with fewer external circuits. The 90 VPK balanced ringing output and selectable 5 REN at 4 kft or 3 REN at 8 kft operating context provide useful line-loading characteristics for bench systems. Its programmable SLIC behavior also helps automate tests across different supervision and codec scenarios. Test engineers must still control the exposure and duration of high-voltage ringing and include calibrated measurement points that do not materially load the device.
Recomendado
Central Office Line Interface
The SI3201-GS can be evaluated for a central-office line interface where a programmable one-channel SLIC with ringing and battery generation is required. Its 60 dB channel-isolation rating and -40°C to 85°C operating range support line-card environments, while the on-chip DC-DC converter provides tracking battery from a 3.3 V to 35 V source. The same-device architecture can simplify software support across a family of line cards. Qualification should confirm exact line impedance, ring cadence, codec timing, protection coordination, and system isolation requirements because the supplied summaries do not provide every production-level parameter.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SI3201-GS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SI3201-FSR | SI3201-FS | SI3201-GSR |
|---|---|---|---|---|
| Package | 16-pin SOIC exposed-pad | 16-pin SOIC exposed-pad | 16-pin SOIC exposed-pad | 16-pin SOIC exposed-pad |
| Brand | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Type | Programmable CMOS SLIC with codec interface and ringing/battery generation | ProSLIC interface IC | ProSLIC interface IC | ProSLIC interface IC |
Diferenciadores clave
- Verified 90 VPK balanced ringing capability (frente a SI3201-FSR)
- Wide 3.3 V to 35 V tracking-battery input (frente a SI3201-FS)
- Specified 60 dB channel isolation and -40°C to 85°C operation (frente a SI3201-GSR)
- Integrated codec interface, battery supply, and ringing generation (frente a SI3201-FSR)
Notas de diseño
Follow the manufacturer exposed-pad layout exactly: connect the thermal and electrical ground pad to a low-impedance ground plane with short vias, while keeping the high-voltage ringing and line-feed nodes physically separated from sensitive logic and codec routing. The supplied public excerpts do not contain the complete recommended land pattern, so do not infer pad dimensions, via counts, or clearances from generic SOIC drawings.
Treat the 3.13 V to 5.25 V core supply and the 3.3 V to 35 V tracking-battery input as separate rails with different decoupling and stress requirements. Place the closest high-frequency bypass capacitors at the IC supply pins and provide stable, low-impedance connections to the battery-generation converter. Validate ringing-load transitions in hardware because the summarized 41 mA operating-current figure does not represent every converter and ringing condition.
A shared 16-pin SOIC footprint does not by itself establish drop-in equivalence. Before substituting SI3201-FSR, SI3201-FS, or SI3201-GSR, compare every pin, exposed-pad connection, supply limit, ringing specification, register map, firmware dependency, and absolute maximum. The verified comparison source specifically notes that some electrical characteristics differ, so a schematic-only review is insufficient.
Ringing is a high-voltage, high-AC slew event even though the core is a low-voltage CMOS device. Route line and ring conductors as tightly coupled or shielded pairs as required, use the shortest practical high-current loops, and keep protection components close to the line entry. Validate conducted and radiated emissions at the complete product level because the public data provides no finished-system EMI performance.
Información de cumplimiento
The verified Mouser listing identifies SI3201-GS as a lead-free 100 V linefeed interface IC for Si321x devices. RoHS, REACH, halogen-free, and conflict-minerals declarations were not included in the supplied excerpts.
