SI3215-GT - Programmable CMOS SLIC/CODEC | Silicon Labs
N.º de pieza: SI3215-GT ✓ ActivoSI3215-GT Descripción general
A SLIC, or subscriber line interface circuit, is the analog and signaling interface between a telephone line and a digital voice-processing system. It forms part of the broader telephony interface hierarchy: SLIC > codec > integrated interface circuit > communications semiconductor. A ProSLIC combines the line-driver, codec, tone generation, ringing-generator, and battery-supply functions into a programmable device, reducing the number of separate components required in a voice endpoint design.
The SI3215 supports software-configurable internal balanced ringing up to 90 VPK. The published ringing capability is stated as 5 REN at 4 kft and 3 REN at 8 kft, allowing the ringing load to be tailored to the line length and telephone-network environment. It also provides DTMF generation and comprehensive telephony signaling support, including requirements associated with Japan and China.
An integrated DC-DC converter acts as the controller for a buck-boost converter that converts a positive supply into the negative battery voltage required by a conventional telephone line. Dynamic control of the battery voltage allows the converter to reduce the required level for a given operating mode, which can help lower power consumption while maintaining line functionality.
The SI3215 family is suited to voice gateways, digital subscriber line equipment, analog telephone adapters, voice-over-IP terminals, embedded telephony systems, and other designs that connect one or more subscriber lines to a digital signal processor or system controller. Programmable operating characteristics make the same hardware platform adaptable to different ringing, battery, and signaling requirements.
Careful line-interface design remains essential even though the codec and ringing functions are integrated. The external network, protection, transformer or coupling components, bypass capacitors, and power-conversion components must be selected for the intended voltage, current, ringing, and surge environment. Designers should also review the Si3215 data sheet before migrating a Si3210 design because the manufacturer explicitly identifies hardware and software differences between the two families.
This product record combines the Si3215 family capabilities with practical migration, protection, layout, and sourcing guidance. It also distinguishes confirmed drop-in candidates from related family variants, helping engineers narrow the selection without treating package similarity as proof of complete electrical, software, and production compatibility.
Alternativas directas para SI3215-GT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
SI3215-BT
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SI3215-FT
✅ Sustitución directaConsulte el precio
Ver hoja de datos →SI3215-GT Especificaciones
| Product Type | Programmable CMOS SLIC/CODEC |
| Maximum Configurable Ringing Voltage | 90 VPK |
| Ringing Load at 4 kft | 5 REN |
| Ringing Load at 8 kft | 3 REN |
| Tensión de alimentación | 3.3 V or 5 V |
| Power Consumption | 41 mA |
| Channel Count | 1 channel |
| Ringing Generation | Software-configurable internal balanced ringing |
| Battery Generation | Integrated dynamic battery voltage generation |
| DC-DC Converter Architecture | Buck-boost controller |
| Tone Generation | DTMF |
| Line Functions | BORSCHT functions |
| Country Signaling Support | Japan and China requirements |
| Package Options in Si3215 Family | 38-pin QFN or 38-pin TSSOP |
| Tipo de montaje | Surface mount |
Guía de configuración de pines de SI3215-GT 38-pin qfn or 38-pin tssop
Configuración de pines para SI3215-GT (encapsulado 38-pin qfn or 38-pin tssop). 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 SI3215-GT.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SI3215-GT es adecuado para 6 aplicacións: Voice-over-IP Telephone Terminal, Digital Subscriber Line Access Equipment, Analog Telephone Adapter, Voice Gateway Line Card, Embedded Telephony Control System, Industrial Voice Monitoring Equipment.
Voice-over-IP Telephone Terminal
The SI3215-GT fits a voice-over-IP terminal that must connect a conventional analog subscriber line to a digital voice processor. Its one-channel SLIC/codec combines line termination, voice conversion, DTMF generation, balanced ringing, and dynamic battery generation in one programmable device. The 90 VPK ringing capability supports 5 REN at 4 kft or 3 REN at 8 kft, allowing the same platform to cover different line lengths. Integrated battery control reduces the number of external line-supply functions, while the host processor must run compatible ProSLIC control software and provide the required protection network.
Recomendado
Digital Subscriber Line Access Equipment
SI3215-GT is appropriate for subscriber-line access equipment requiring a programmable integrated line interface and codec. The device performs the principal BORSCHT line functions, generates DTMF tones, and supplies balanced ringing without a separate ringing generator. Its dynamic negative-battery generation is especially useful in designs that want to minimize the required battery voltage for each operating mode. For access products, designers should still implement a compliant protection network and verify line length, loop current, ringing load, and regional signaling requirements against the manufacturer data sheet.
Recomendado
Analog Telephone Adapter
The SI3215-GT supports a compact analog telephone adapter by integrating the subscriber line interface, codec, tone generation, ringing supply, and battery supply into a single programmable IC. Its 3.3 V or 5 V operation accommodates common embedded processor platforms, while the one-channel architecture matches a basic FXS endpoint. The 90 VPK balanced-ringing capability allows the adapter to serve real telephone lines rather than restricted test loads. Product developers must validate the external protection, coupling network, and converter layout because those networks determine survivability and signal quality.
Recomendado
Voice Gateway Line Card
A voice gateway line card can use SI3215-GT to provide one programmable analog line endpoint per channel. Software-controlled ringing, DTMF generation, and battery behavior simplify support for different subscriber services and regional operating modes. The reported consumption of approximately 41 mA is useful during initial thermal and power-budget planning, although actual demand depends on line activity and converter efficiency. Dense line cards should preserve the recommended separation between sensitive codec signals, ringing outputs, switching converters, and protection components.
Recomendado
Embedded Telephony Control System
SI3215-GT is suitable for embedded telephony controllers that need programmable subscriber-line behavior rather than a fixed analog interface. The integrated codec, DTMF generation, ringing generator, and dynamic battery supply reduce external component count, while programmable registers allow the host software to configure line operating modes. The 38-pin TSSOP option also supports conventional surface-mount assembly methods. Firmware migration should be planned carefully because the Si3215 data sheet identifies hardware and software differences between the Si3215 and Si3210 families.
Recomendado
Industrial Voice Monitoring Equipment
The SI3215-GT can support industrial voice-monitoring equipment that connects legacy analog lines to a modern acquisition or control system. Programmable balanced ringing and DTMF generation support remote line testing, while the one-channel codec provides the voice path. Dynamic battery generation helps the subsystem adapt the line supply to the active mode, which is valuable in unattended installations with varying call activity. The design must include isolation and surge protection appropriate to the installation environment, and it should be tested across supported ringing loads and line lengths.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SI3215-GT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SI3215-BT | SI3215-FT |
|---|---|---|---|
| Package | 38-pin TSSOP | 38-pin TSSOP | 38-pin TSSOP |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Type | Programmable CMOS SLIC/CODEC | Programmable CMOS SLIC/CODEC | Programmable CMOS SLIC/CODEC |
| Channel Count | 1 channel | 1 channel | 1 channel |
| Supply Voltage | 3.3 V or 5 V | 3.3 V or 5 V | 3.3 V or 5 V |
| Operating Consumption | 41 mA | 41 mA | 41 mA |
| Maximum Ringing Voltage | 90 VPK | 90 VPK | 90 VPK |
| Ringing Load at 4 kft | 5 REN | 5 REN | 5 REN |
| Ringing Load at 8 kft | 3 REN | 3 REN | 3 REN |
| Battery Supply | Integrated dynamic negative battery-voltage generation | Integrated dynamic negative battery-voltage generation | Integrated dynamic negative battery-voltage generation |
| Tone Generation | DTMF | DTMF | DTMF |
Diferenciadores clave
- Integrated programmable line interface (frente a SI3215-BT)
- Country-aware telephony signaling support (frente a SI3215-FT)
- Configurable ringing load capability (frente a SI3215-BT)
Notas de diseño
Treat the SI3215-GT buck-boost battery supply as a switched power-conversion subsystem rather than a passive negative rail. Follow the manufacturer application circuit for inductor, capacitor, diode or switch selection, loop area, and feedback routing. The dynamic battery controller reduces the required voltage according to operating mode, but converter layout and component selection still determine ripple, conversion efficiency, and stability around the subscriber line.
Separate the high-voltage ringing and battery paths from the codec and digital interface routing. Keep the DC-DC converter loop compact, maintain a short return path for its high-current switching node, and place protection components close to the line-facing connector. Use the manufacturer layout guidance when assigning ground and power planes because unexpected coupling between ringing output circuitry and the voice path can degrade signal integrity.
Do not substitute a Si3215 or Si3210 variant solely because it has a 38-pin package. Confirm the exact ordering suffix, package drawing, pin assignment, temperature grade, software support, ringing limits, and lifecycle status. The manufacturer data sheet explicitly notes hardware and software differences between Si3215 and Si3210, and even within the Si3215 family the ordering suffixes must be checked before a production substitution is approved.
Validate the complete line interface with the intended external protection and coupling network instead of relying only on codec-level tests. Check receive sensitivity, DTMF generation and detection behavior, line current, ringing load, and on-hook battery levels across the required line lengths. The published 90 VPK capability and 5 REN at 4 kft or 3 REN at 8 kft define supported ringing scenarios, not permission to omit surge protection.
Información de cumplimiento
The available manufacturer and distributor records do not explicitly state the requested compliance statuses. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations using the manufacturer's current product documentation.
