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SI3201-FS

SI3201-FS 100V Linefeed Interface IC | Skyworks | 16-SOIC

The Skyworks Solutions, Inc. SI3201-FS is a Subscriber Line Interface Concept (SLIC) integrated circuit designed for customer premise equipment and analog telephone interface applications. It is identified as a 100 V linefeed interface IC for the Si321x family, with a codec interface, programmable CMOS SLIC architecture, integrated battery supply, and software-programmable ringing voltage generation. The device is supplied in a 16-pin SOIC package and is marketed as a lead-free component. The SI3201-FS addresses the subscriber-line side of a voice terminal or CPE design by combining linefeed control, ringing-voltage generation, battery feed, and codec interfacing in one IC. Its programmable architecture allows the system to configure line parameters and ringing behavior through software rather than relying on a large collection of discrete telephone-network components. The listed electrical headline is a 100 V linefeed interface, while the device description identifies programmable internal balanced ringing up to 90 VPK under specified REN and loop-length conditions. A key feature is the integrated battery supply with dynamic voltage output. In a telephone design, this function supports the line DC feed required by the subscriber line while allowing the system to manage line conditions dynamically. The software-programmable codec interface simplifies connection between the line interface and a digital voice processor or system controller. Because the SI3201-FS is intended for a 16-SOIC footprint, it can be integrated into CPE hardware with a surface-mount assembly process rather than through-hole insertion. Typical applications include analog telephone adapters, voice over IP terminals, residential gateways, digital subscriber line equipment, and other CPE products requiring a programmable analog line interface. The device should be selected only when the host design supports the associated ProSLIC software, codec interface, ringing and battery requirements, and the specified line parameters. The SI3201-FS is not a general-purpose low-voltage regulator or a replacement for a conventional codec. For implementation, engineers must follow the manufacturer datasheet for hook-state behavior, linefeed current, ringing limits, battery voltage, external component selection, and software configuration. Particular attention should be paid to the 100 V linefeed classification and the 90 VPK balanced ringing capability, since these values determine insulation, creepage, transient protection, and PCB spacing requirements. This page consolidates the verified distributor descriptions, package information, sourcing links, and application guidance for engineers evaluating the SI3201-FS.

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SI3201-GS

SI3201-GS - Programmable CMOS SLIC with 90 V Ringing | Silicon Laboratories

The Silicon Laboratories SI3201-GS is a programmable CMOS subscriber line interface circuit that integrates SLIC, codec, ringing-voltage generation, and battery-supply functions in a 16-pin SOIC exposed-pad package. It operates from a 3.3 V or 5 V system supply, accepts a 3.3 V to 35 V DC input for battery generation, and provides balanced ringing up to 90 VPK. The device supports 5 REN at 4 kft and 3 REN at 8 kft line loading conditions. Its integrated approach reduces the number of external telephone-interface components required in voice-over-packet, analog terminal, and central-office line-card designs. Programmable interface characteristics make it suitable for telephone equipment requiring configurable line supervision, codec interfacing, and on-hook power generation. 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.

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SI3201-KS

SI3201-KS - Programmable CMOS SLIC with Ringing | Silicon Labs

The Silicon Labs SI3201-KS is a low-voltage programmable CMOS subscriber line interface circuit and codec for customer premises equipment, with software-programmable ringing and battery-voltage generation. It supports internally balanced ringing up to 90 VPK, including 5 REN at 4 kft and 3 REN at 8 kft, and is supplied in a 16-SOIC package with an exposed pad. The SI3201-KS combines the linefeed interface, codec interface, ringing generator, and battery supply in one CMOS IC. A SLIC, or subscriber line interface circuit, is an analog telephone-interface component that connects a central-office telephone line to customer equipment. It belongs to the telephone-interface IC hierarchy, where it bridges a high-voltage analog line and low-voltage digital or analog circuitry. The SI3201-KS is specifically associated with ProSLIC-type customer premises equipment and provides a programmable alternative to discrete linefeed networks. Principal features include software programmability, a codec interface, internal balanced ringing generation up to 90 VPK, and an integrated battery supply with dynamic voltage output. Distributor listings describe the device as a 100 V linefeed interface for Si321x applications. The 16-SOIC package measures 0.154 inch, or 3.90 mm, in width and uses an exposed-pad thermal and construction option. The device combines high-voltage analog line-interface functions with low-voltage CMOS control logic. Its programmable architecture allows ringing and line parameters to be configured through the associated control system rather than relying only on fixed passive networks. The exact supply voltages, DC feed characteristics, codec interfaces, temperature range, and absolute maximum ratings are not fully exposed in the supplied search records and should therefore be confirmed in the manufacturer datasheet. Typical applications include analog telephones, voice-over-IP terminals, DSL or broadband customer premises equipment, analog fax machines, voice gateways, and other carrier-facing or analog telephone adapters. The SI3201-KS is most appropriate where an integrated, programmable SLIC can simplify the line-interface section and reduce discrete external circuitry. The principal design consideration is the high-voltage line and ringing interface. PCB creepage, isolation, component spacing, surge protection, and thermal performance require careful attention even though the IC itself is a low-voltage CMOS device. Designers should also confirm the exposed-pad land pattern, required external components, and codec compatibility against the exact manufacturer datasheet before layout release.

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SI3210-BT

SI3210-BT - Programmable SLIC/CODEC with Ringing | Skyworks

The Skyworks Solutions, Inc. SI3210-BT is a programmable CMOS subscriber line interface circuit and codec (SLIC/CODEC) with integrated ringing and battery-voltage generation. It supports one telephone line, 3.3 V or 5 V operation, and the SI3210 family is offered in a 38-pin TSSOP configuration. The device consolidates line-interface, voice-processing, DTMF, and telephone-signaling functions into one integrated circuit. A SLIC is an interface IC that connects a digital communications system to an analog telephone line. Typical SLIC functions include DC feed, line termination, ring voltage generation, line supervision, codec conversion, tone generation, and caller-ID signal handling. By placing these functions in a programmable CMOS device, the SI3210-BT allows system designers to adapt line behavior through manufacturer-defined control registers rather than using a large collection of discrete telephone components. The SI3210/Si3211 family supports software-configurable ringing with up to five REN and 90 VPK, along with DTMF generation and decoding and Caller ID generation. These capabilities make the family applicable to analog telephone adapters, voice-over-IP terminal equipment, digital subscriber line terminal designs, customer-premises equipment, and other line-powered telecom products. The family documentation also describes comprehensive telephony signaling support for global operation. The SI3210-BT is identified in comparison data as a one-channel SLIC with 60 dB performance and approximately 41 mA operation from 3.3 V or 5 V supplies. The -BT suffix denotes the 38-pin TSSOP ordering option. Because the SI3210-BT is marked obsolete, engineers should confirm availability, lifecycle expectations, and the exact package drawing before beginning a new production design. A robust line-interface design must account for high ringing voltage, transient protection, hook-state transitions, analog isolation, and PCB creepage. The ring generator can reach 90 VPK, so external protection and insulation coordination are essential even though the ringing function is integrated. Firmware configuration and production test should also be treated as part of the product design rather than treating the IC as a fixed-function codec. This page consolidates verified family specifications, sourcing links, package constraints, and practical line-interface guidance. It also distinguishes the documented SI3210 options from unverified assumptions, helping engineers evaluate obsolete inventory without presenting it as a currently recommended new-design choice.

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SI3210-FT

SI3210-FT - 1-Channel ProSLIC SLIC/CODEC | Silicon Labs

Silicon Labs SI3210-FT is a 1-channel ProSLIC subscriber line interface circuit and codec that integrates a SLIC, voice codec, ringing generator, and battery-voltage generation into a programmable CMOS 38-pin TSSOP package. It supports 3.3 V and 5 V operation, draws 41 mA, and provides a 60 dB line-related performance figure. The device is designed for wired-line telephone interfaces requiring software-configurable voice, signaling, ringing, and DC feed functions. A SLIC, or Subscriber Line Interface Circuit, is the analog-side interface between a telephone line and digital voice-processing equipment. In the product hierarchy, a SLIC belongs to the broader category of telecom interface integrated circuits. The SI3210-FT combines that analog line interface with a codec, DTMF processing, caller-ID generation, ringing-voltage generation, and a DC-DC controller that can track a battery voltage from a 3.3 V to 35 V input. This integration reduces the number of external components required in a subscriber-line access design. Key features include software-configurable internal ringing for up to five REN, ringing support up to 90 VPK, DTMF generation and decoding, caller-ID generation, and comprehensive BORSCHT functions. The single-channel architecture targets one analog subscriber line rather than a multi-line office endpoint. Its programmable CMOS implementation allows line parameters, tone generation, and signaling behavior to be configured through the associated control interface. The SI3210-FT uses a PCM and SPI interface for connection to digital communication equipment. The PCM path carries voice samples, while the SPI path supports device configuration and status access. Because the device integrates both codec and line-interface functions, a telephone interface design can use a single high-level IC while retaining access to software-programmable line parameters and signaling features. Typical applications include analog telephone adapters, voice-over-IP terminal front ends, small-business telephony equipment, digital subscriber line terminal equipment, embedded voice gateways, and legacy telephone-line interface designs. The 38-pin TSSOP package supports surface-mount assembly while retaining a conventional leaded-package footprint for telecom and embedded equipment. Design attention should focus on the high-voltage ringing path, external line-network protection, DC-DC power-conversion layout, and the separation between sensitive voice signals and switching or ringing waveforms. Follow the manufacturer’s reference layout and component-selection guidance, and verify that the external protection network is appropriate for the maximum ringing voltage and line exposure. This product page consolidates the device specifications, documented alternatives, application guidance, and practical design considerations into an engineering-focused view. It also distinguishes documented package and electrical differences among candidates so designers can assess PCB reuse, environmental requirements, and firmware compatibility before selecting a replacement.

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SI3210-GT

SI3210-GT - Programmable CMOS SLIC/CODEC | Skyworks Solutions

Skyworks Solutions Inc. SI3210-GT is a programmable low-voltage CMOS subscriber line interface circuit, or SLIC, with integrated codec and battery-voltage generation functions in a 38-pin TSSOP package. It operates from 3.13 V to 5.25 V and is designed specifically for short-loop analog telephone interfaces where the line, voice codec, ringing and battery functions must be combined in one controlled integrated circuit. A SLIC is the line-facing portion of a telephone interface, while a codec converts between analog voice signals and digital PCM data. The SI3210-GT combines these functions with ringing and battery-voltage generation to reduce the number of external components required in terminal adapters, cable telephony products and related short-loop equipment. In this product hierarchy, it is an integrated SLIC and codec within the broader category of telecom interface ICs. Programmable operation allows the device to be configured for different line conditions and application requirements. This is particularly useful in products that must accommodate variations in loop length, subscriber-line loading, ringing behavior or voice-path implementation. The integrated battery generator supports the line-powering requirements associated with analog telephone equipment, while the codec provides the voice interface to the surrounding digital communications system. The SI3210-GT is particularly relevant to compact telephone line-card and terminal-adapter designs. Its 38-pin TSSOP package provides a practical surface-mount format for equipment where a larger quad flat package would be unnecessary. Because the device includes SLIC, codec and battery-generation circuitry, board designers can evaluate whether separate line-interface and voice-processing components can be consolidated, provided the complete electrical, timing and firmware requirements of the target design remain satisfied. Typical applications include cable telephony terminal adapters, short-loop line interfaces, analog telephone adapters and wireless local-loop equipment. The device is also associated with legacy telecom-interface designs, so firmware, line-state supervision and analog compliance testing are important considerations when integrating it into new equipment. Design work should follow the manufacturer datasheet for power sequencing, external line-network components, codec clocking, digital interface connections, filtering and layout. The 3.13 V to 5.25 V supply range does not remove the need to verify every minimum and maximum operating condition, particularly during ringing, hook-state transitions and off-hook load changes. This product page combines the documented SLIC, codec, battery-generation and package characteristics with application guidance, verified source links, comparison details and engineering-focused design notes. It is intended to help engineers identify the correct legacy telecom-interface part and evaluate replacement decisions without overlooking software, line-network or package-compatibility requirements.

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SI3211-BT

SI3211-BT - Single-Channel SLIC/Codec | Skyworks Solutions

Skyworks Solutions SI3211-BT is a single-channel subscriber line interface circuit and voice codec with DTMF decoding, designed in a 38-pin TSSOP surface-mount package. The device integrates telephony line-interface and codec functions, accepts 3.3 V and 5 V supply operation, draws 88 mA, and is specified for 700 mW power consumption and an ambient temperature range of -40°C to +85°C. It provides software-configurable internal ringing up to 90 VPK across five REN. A subscriber line interface circuit, or SLIC, is the analog-facing section of a telephone line interface. It bridges a PSTN or voice-frequency line with digital voice-processing electronics, while the codec converts linear audio into a digital PCM stream. Together, SLIC and codec functions form a subscriber line interface circuit, which belongs to the broader category of telecom interface integrated circuits and ultimately to the semiconductor hierarchy. The SI3211-BT combines five-REN ringing, DTMF generation and decoding, Caller ID generation, and comprehensive telephony signaling in one device. Its single-channel architecture suits designs requiring one analog line and one digital voice path. Configuration through the SPI interface allows the equipment controller to manage line states, tone signaling, voice processing, and other subscriber-line functions. The SI3211 family uses a CMOS implementation and separates line-interface requirements from host digital processing. The SI3211 variant selects an external tracking-battery supply, while the related SI3210 variant includes battery generation. This distinction is important when selecting a device because the external line-battery implementation, component values, and power budget must align with the telephone line being supported. Typical applications include analog telephone adapters, voice-over-IP terminals, voice gateways, digital subscriber line equipment, fax and multifunction-printer interfaces, and embedded telephony controllers. Its software-configurable ringing and signaling functions can reduce the number of discrete line-interface components while allowing common firmware to serve multiple regions and line conditions. Design the SI3211-BT around the external line network, protection components, digital host interface, and tracking-battery requirements specified in the manufacturer datasheet. Keep sensitive analog and line-driver traces away from fast SPI and PCM activity, provide the required bypass capacitors close to the supply pins, and validate surge, ringing, and off-hook behavior in the intended telephone network. This product page combines the SI3211-BT interface, package, environmental, and signaling specifications with practical selection guidance, commercial request instructions, and an explicit review of drop-in replacement availability. It helps engineers distinguish the SI3211 from related family members before committing a telecom line-card design to production.

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SI3211-KT

SI3211-KT - Single-Channel SLIC/Codec | Silicon Labs

Silicon Labs SI3211-KT is a programmable CMOS subscriber line interface and codec (SLIC/codec) designed for one-channel telephone-line interface applications. It integrates a single-channel SLIC, codec, DTMF decoder, ringing-voltage generation, and battery-voltage generation functions in a 38-terminal gull-wing TSSOP package. The device operates from 5 V, making it suitable for telecommunications equipment requiring a dedicated integrated line-interface solution. A SLIC is the analog-facing portion of a telephone subscriber line interface. It handles the line conditions encountered by voice-band equipment and provides the interface between the central-office line and digital voice-processing circuitry. A codec converts analog voice signals into digital representations and reverses that process. The SI3211-KT combines these functions with ringing and battery-voltage generation to support compact, single-channel subscriber line interface designs. Programmability is the central feature of the SI3211-KT. Its CMOS interface circuitry allows system designers to configure line parameters rather than relying only on fixed external analog networks. The integrated DTMF decoder supports detection of dual-tone multifrequency signaling, while the ringing and battery-voltage generators support the DC and ringing conditions required by connected telephone equipment. Integration reduces the number of discrete functions required around the line interface. The SI3211-KT is identified as a commercial-temperature component and is supplied in a 38-pin TSSOP package with gull-wing leads and a rectangular package body. This package supports conventional surface-mount assembly and inspection, but the narrow lead pitch requires a careful PCB footprint and adequate clearance between adjacent routed conductors. A complete terminal map and recommended land pattern should be taken directly from the manufacturer datasheet and package drawing before layout release. Typical uses include single-channel voice-over-IP terminals, analog telephone adapters, embedded telephony gateways, customer-premise line equipment, and small-format telephone interface modules. In these systems, the device can consolidate line termination, voice conversion, DTMF recognition, and subscriber-line power functions. The exact external component network and firmware configuration remain application-specific and should follow the manufacturer reference design and application guidance. Power routing should provide a low-impedance 5 V rail and a quiet return path to the line-interface analog section. Keep sensitive routing away from switching nodes and high-current ringing paths, and place filtering and protection components near the line connector. PCB creepage, clearance, surge protection, and isolation requirements must be established from the applicable telephone-interface environment rather than inferred from the package dimensions. This page consolidates the available SI3211-KT product information into an engineering-focused package summary, application guidance, comparison framework, and design checklist. Because a verified pin-to-pin replacement was not identified, replacement decisions should begin with the Request a Quote form on this page and conclude with a full review of terminal assignments, line parameters, clocking, firmware, and protection requirements.

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SI3215-BT

SI3215-BT - Programmable SLIC/Codec | Silicon Labs

The Silicon Labs SI3215-BT is a single-channel programmable CMOS Subscriber Line Interface Circuit and integrated codec with ringing and battery-voltage generation, packaged in a 38-pin TSSOP. It supports a 3.13 V to 5.25 V supply range, 41 mA operating current, 60 dB signal performance, and GCI, PCM, and SPI interfaces. Its software-configurable ringing generator supports up to 5 REN and 90 VPK. A SLIC is the analog-facing circuit that connects a telephone line to a digital voice system, while a codec converts between analog voice signals and digital PCM data. The SI3215-BT combines these functions into one programmable device, placing line termination, voice conversion, ringing generation, and battery feeding in a single telecom interface IC. Programmable internal balanced ringing is one of the device’s principal functions. The ringing engine can operate at 5 REN up to 4 kft or 3 REN up to 8 kft, with a maximum ringing voltage of 90 VPK. DTMF generation, BORSCHT line functions, and expanded support for Japan and China country requirements broaden its applicability to regional analog telephone systems. An integrated battery supply and dynamically controlled DC-DC converter produce the negative battery voltage required by the line interface. The converter continuously adjusts its operating point to minimize power consumption. According to the manufacturer datasheet, the SI3215 also performs all BORSCHT functions and supports software migration considerations from the earlier Si3210 family. Typical uses include single-line VoIP adapters, analog terminal adapters, embedded telephony gateways, voice-over-IP endpoint equipment, and legacy telephone interface designs that require PCM or GCI connectivity. The 38-pin TSSOP package is suitable for conventional surface-mount assembly where the system also requires high-voltage ringing and battery circuitry. Designers must account for the line-side high voltage, isolated ringing requirements, analog impedance matching, digital codec timing, and power-supply sequencing. The exact hook state, DC feed, ringer threshold, and country-specific parameters should be programmed and validated against the target line and network requirements before production release. This product page combines package, interface, ringing, supply, and application details with practical design considerations for engineers evaluating the SI3215-BT. It also identifies the limitations of cross-reference results so that a replacement is selected only when package, pinout, interface, and telephone-network behavior are confirmed together.

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SI3215-C-FM

SI3215-C-FM - ProSLIC SLIC/Codec with 90VPK Ringing | Skyworks

The Skyworks SI3215-C-FM is a single-channel ProSLIC Subscriber Line Interface Concept (SLIC) and CODEC IC housed in a 38-pin QFN (5x7 mm) package, integrating software-configurable 5 REN internal ringing up to 90 VPK, DTMF generation, and a comprehensive set of telephony signaling capabilities with expanded support for Japan and China country requirements. It pairs with the Si3201 line-side DC-DC controller (in a thermally-enhanced 16-pin SOIC) to form a complete FXS interface solution. Supply voltage is 3.13V to 5.25V with a typical 88 mA supply current and approximately 700 mW power dissipation; operating temperature is 0C to 70C. A SLIC (Subscriber Line Interface Concept) is the analog front-end IC that connects a central-office or customer-premises telephone line to a digital voice path, performing the BORSCHT functions (Battery, Over-voltage, Ringing, Supervision, Codec, Hybrid, Test). The SLIC category sits within the broader telecom interface IC family and is essential for VoIP gateways, embedded media gateways, and integrated access devices where legacy copper-pair connectivity must coexist with packetized voice. Key features include software-programmable internal balanced ringing to 90 VPK (5 REN to 4 kft, 3 REN to 8 kft), integrated battery supply with dynamic voltage generation, on-hook/off-hook detection, polarity reversal, and a PCM/SPI/GCI digital interface. The -C variant denotes the commercial (0C to 70C) temperature grade and the FM suffix denotes the 38-pin QFN (5x7) package. The part delivers >60 dB longitudinal balance and supports worldwide DC feed and ringing characteristics through firmware configuration rather than hardware strapping. The Si3215 ProSLIC architecture uses a high-voltage bipolar line-side driver controlled by an integrated low-voltage CMOS DSP-like controller; all ringing and feed parameters are loaded through the SPI control port at boot. Compared to discrete line-interface solutions built from individual op-amps, relays, and ringing generators, the ProSLIC dramatically reduces PCB area and BOM count while providing software-controlled country compliance. Typical applications include VoIP residential gateways, integrated access devices (IADs), cable embedded media terminals, PON/ONU voice port adapters, and small-office/home-office (SOHO) routers with FXS ports. The 90 VPK ringing and DTMF generation make it suitable for direct connection to analog telephones, faxes, or modems on the tip-and-ring copper pair. When designing with the Si3215-C-FM, observe the line-side surge and over-voltage protection guidance in the Si3215 datasheet; the Si3201 DC-DC controller must be co-designed for proper battery and ringing voltage generation. Decoupling must be placed within 2-3 mm of each supply pin to keep PCM and SPI buses free of switching noise from the internal DC-DC converters. This page synthesizes datasheet parameters from the manufacturer, distributor availability, and detailed comparison context for Skyworks ProSLIC family members that share the same 38-QFN footprint for drop-in PCB reuse.

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SI3215-FM

SI3215-FM - ProSLIC Programmable CMOS SLIC/Codec, 5 REN, 90Vpk | Skyworks

The Skyworks (formerly Silicon Laboratories) SI3215-FM is a ProSLIC programmable CMOS Subscriber Line Interface Circuit (SLIC) with integrated codec and ringing/battery voltage generation, housed in a 38-pin QFN (5x7 mm) package. It integrates the SLIC, codec, and battery generation functionality into a single CMOS IC, providing a complete analog telephone interface ideal for customer premise equipment (CPE) applications such as VoIP gateways, ATA adapters, and integrated access devices. What is a SLIC/Codec? A Subscriber Line Interface Circuit (SLIC) is a critical analog front-end IC that connects a digital telecom system to the analog 2-wire telephone subscriber line, performing DC feed, overvoltage protection, supervision (off-hook/on-hook/ring-trip detection), and 2-wire to 4-wire hybrid conversion. The codec digitizes the voice band signal for DSP processing. A ProSLIC integrates the SLIC, the codec, and the high-voltage battery/ringing supply generation on a single low-voltage CMOS die, dramatically reducing BOM count versus discrete SLIC + codec + boost-converter designs. Key features include software-configurable 5 REN internal ringing up to 90 Vpk without an external ringing generator, integrated DTMF/melody generation, and a comprehensive set of telephony signaling capabilities with expanded support of Japan and China country requirements. The device operates from a single low-voltage supply paired with the Si3201 line-driver companion IC, and supports both polarity-reversal and metering pulse generation needed for international billing standards. The ProSLIC architecture uses a low-voltage CMOS core driving a high-voltage external bipolar transistor array (via the Si3201), achieving the wide dynamic range and 1500V isolation typically required for tip-and-ring while keeping the primary silicon on a low-cost CMOS process. The integrated DC-DC controller eliminates the need for a discrete boost converter for ringing/battery generation. Typical applications include VoIP residential gateways, cable embedded MTA, optical network terminals (ONT/ONU), small-office/home-office (SOHO) routers with FXS ports, and wireless fixed-line terminals. The expanded Japan/China compliance makes it well suited for Asian telecom CPE designs. When designing with the SI3215-FM, the Si3201 line interface IC must be used as a companion device for the high-voltage tip/ring drivers; signal integrity between the two ICs is critical and the datasheet provides a reference PCB layout. Proper thermal management of the 38-QFN package is required for sustained ringing loads. This page synthesizes distributor pricing, drop-in alternative MPNs from the ProSLIC family, and PCB design notes not consolidated in the manufacturer datasheet, providing actionable information for telecom hardware engineers selecting FXS ports.

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SI3215-FT

SI3215-FT - 90 VPK Programmable SLIC/Codec | Silicon Labs

The Silicon Labs SI3215-FT is a programmable CMOS subscriber line interface circuit and codec (ProSLIC) designed for customer-premise telecommunications equipment. It supports software-configurable internal ringing up to 90 VPK, operates with up to 5 REN at 4 kft, and supports up to 3 REN at 8 kft. The device is packaged in a 38-pin TSSOP and combines BORSCHT line functions, ringing and battery-voltage generation, voice codecs, and digital telephony signaling in one integrated circuit. A ProSLIC is a highly integrated telephone-interface IC used to connect a voice codec and digital line-control system to an analog subscriber line. Its programmable architecture replaces several discrete functions associated with BORSCHT line supervision, ring generation, battery feed, DTMF generation, and codec operation. This integration reduces external circuitry while allowing line behavior to be adjusted through device software rather than fixed external component networks. Key features include internal balanced ringing to 90 VPK, dynamically controlled battery voltage, DTMF generation, and software-programmable country-specific signaling. According to the manufacturer datasheet, the Si3215 family supports requirements associated with Japan and China. The integrated DC-DC converter controller continuously minimizes power by producing the battery voltage required for the current operating state from a single positive supply, reducing the need for a large external battery supply. The SI3215 is intended for single-channel CPE designs where analog telephone access must coexist with a digital voice processor. Its digital interfaces and programmable control allow the host system to manage line state, ring cadence, tone generation, and codec operations. A complete implementation must account for linefeed components, protection paths, ringing-network constraints, thermal margins, and host-specific register configuration. Typical applications include analog VoIP terminals, customer-premises telephony equipment, digital telephone adapters, voice-over-LAN endpoints, embedded telephony gateways, and legacy telephone-interface designs requiring programmable BORSCHT behavior. The 38-pin TSSOP package is also appropriate where a surface-mount single-channel solution is required but a higher pin-count QFN variant is not necessary. Designers should use the pin-description and typical application circuits in the manufacturer datasheet when assigning PCB nets and selecting the external line interface network. Validate ringing voltage, loop current, dc feed, thermal performance, and protection behavior in the final telephone equipment because these parameters depend on the line length, country-specific requirements, and external passive network. This page organizes the principal Si3215 capabilities into an application-focused guide, adds practical implementation considerations, and separates documented functions from parameters that must be confirmed in the complete manufacturer datasheet before a new board is released.

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SI3215-GT

SI3215-GT - Programmable CMOS SLIC/CODEC | Silicon Labs

Silicon Labs SI3215-GT is a programmable CMOS subscriber line interface circuit and codec with integrated ringing and battery-voltage generation. It performs the line-side signaling functions used in voice-over-packet and digital telephone systems, supports software-configurable balanced ringing up to 90 VPK, and generates DTMF tones. The device is available in a 38-pin surface-mount package configuration identified in the Si3215 family documentation as TSSOP or QFN. 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.

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SI3215-KT

SI3215-KT - 90 VPK Programmable SLIC/Codec | Silicon Labs

The Silicon Laboratories SI3215-KT is a programmable CMOS SLIC/codec with integrated ringing and battery-voltage generation, supporting up to 5 REN and 90 VPK internal ringing in a 38-pin TSSOP package. It consolidates subscriber-line interface, codec, tone generation, and line-voltage functions into one programmable device for telephone line-card designs. A SLIC, or subscriber-line interface circuit, is the analog front end between a telephone line and digital voice-processing circuitry. A COC, or codec, converts that analog voice signal into a digital PCM stream. The SI3215-KT combines these functions in a programmable CMOS IC, reducing external circuitry while allowing line parameters and signaling behavior to be configured through the device software. The SI3215-KT supports software-configurable internal ringing up to 90 VPK. The ringing capability accommodates 5 REN at 4 kft and 3 REN at 8 kft, providing flexibility across different line lengths and network loading conditions. It also includes DTMF generation, an integrated battery supply with dynamic voltage output, and an on-chip DC-DC converter that continuously minimizes power consumption during operation. The device provides the BORSCHT line-interface functions in programmable CMOS. Its telephone signaling capabilities include expanded support for Japan and China country requirements, making it suitable for regional line-card and voice-access equipment. The manufacturer datasheet also documents migration differences from the earlier Si3210, which is important when reusing software, hardware, or production test procedures. Typical uses include Voice-over-Packet adapters, digital loopback terminators, integrated access devices, analog telephone adapters, and subscriber-line access concentrators. A design can use the integrated codec path for digital voice transport while using the programmable SLIC functions to supervise the line, control DC feed, and generate ringing voltage without a separate line-interface processor. Layout is especially important because this device controls a high-voltage analog line interface alongside sensitive digital signaling. Follow the manufacturer datasheet for the 38-pin TSSOP footprint, decoupling placement, ground-return construction, and isolation boundaries. Keep switching and high-energy ringing pathways away from codec and clock traces to reduce susceptibility to noise and surge-induced disturbance. This page consolidates the SI3215-KT’s key line-card functions, sourcing guidance, application fit, and practical integration considerations. It also distinguishes verified device capabilities from specifications that require confirmation against the manufacturer datasheet, helping engineers plan a design before finalizing the PCB, firmware, and production test strategy.

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SI3215M-C-FMR

SI3215M-C-FMR - Single-Channel SLIC/Codec w/ MOSFET DC-DC | Skyworks

The Skyworks Solutions (formerly Silicon Labs) SI3215M-C-FMR is a single-channel ProSLIC programmable CMOS Subscriber Line Interface Circuit (SLIC) with integrated codec, ringing, and MOSFET-based DC-DC converter, packaged in a 38-pin QFN (5x7 mm). It operates from a 3.13 V to 5.25 V supply, draws 88 mA typical supply current, and dissipates up to 700 mW while performing all BORSCHT functions on a single twisted-pair line. An SLIC (Subscriber Line Interface Circuit) is a mixed-signal IC used in VoIP gateways, central-office line cards, and DSLAM/PON ONU platforms to interface between the digital PCM/ SPI bus of a host processor and the analog 2-wire subscriber line. The SLIC handles Battery feed, Over-voltage protection, Ringing, Supervision, Coding, Hybrid, and Test (BORSCHT). Modern single-chip ProSLICs integrate the codec, battery switcher, and ringing waveform generator, replacing dozens of discrete analog components that older designs required. SI3215M-C-FMR is part of the Si3215 family that integrates a MOSFET-driver DC-DC converter, eliminating the external BJT or inductor typically required for the line-side battery feed. Key features include software-programmable internal balanced ringing up to 90 VPK (5 REN to 4 kft, 3 REN to 8 kft), an integrated battery supply with dynamic voltage control, low-power standby, and on-hook transmission. The 'M' suffix denotes the MOSFET-output variant (Si3215 without the M uses an external BJT/inductor), and the polarity of DCFF vs DCDRV is the only circuit difference between the two versions. Host interface options include PCM, GCI, and SPI for flexible connection to most VoIP SoCs. Typical applications include VoIP residential gateways, integrated access devices (IADs), PON/GPON ONTs, cable eMTA, small-office PBX line cards, and industrial FXO/FXS adapters. The integrated MOSFET driver cuts BOM cost and board area versus BJT-based SLICs. When designing with SI3215M-C-FMR, ensure the DC-DC converter's MOSFET and catch diode meet the peak ringing/battery-feed current demand; verify thermal dissipation on the QFN exposed pad and follow Skyworks reference layout for EMI/ESD compliance. This page synthesizes distributor pricing from 8+ sources, drop-in pin-compatible Si3215 family alternatives, and practical design notes not found on the manufacturer datasheet.

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SI3216-BT

SI3216-BT - 38-TSSOP Voice SLIC/CODEC | Silicon Labs

Silicon Labs SI3216-BT is a single-channel ProSLIC analog telephone interface with GCI, PCM, and SPI interfaces, a 3.13 V to 5.25 V supply range, and a 38-pin TSSOP package. It supports wideband audio from 50 Hz to 7.0 kHz and narrowband audio from 200 Hz to 3.4 kHz, including 16-bit voice processing at a 16 kHz sampling rate. A SLIC, or subscriber line interface circuit, is the analog front end used to connect a telephone line to a digital voice system. It belongs to the codec and telephone-interface hierarchy within integrated interface ICs. By combining line-interface circuitry with voice encoding functions, the SI3216-BT is designed for Voice-over-IP gateways, analog terminal adapters, voice gateways, and other equipment that connects a copper-wire telephone line to a digital voice processor. The SI3216-BT combines a 1-channel SLIC/CODEC architecture with support for both wideband and narrowband operating modes. Its stated supply current is 88 mA, its rated power dissipation is 700 mW, and its operating temperature range is -40°C to +85°C. GCI, PCM, and SPI interfaces give system designers several paths for connecting the device to line-processing and control electronics. The industrial-temperature grade suits equipment expected to operate across extended commercial temperature environments. Technical operation depends on a low-voltage CMOS implementation operating from 3.13 V to 5.25 V. Wideband mode covers 50 Hz to 7.0 kHz for enhanced-voice systems, while narrowband mode covers 200 Hz to 3.4 kHz for conventional telephony. The 16-bit, 16 kHz codec capability supports digital voice processing with a 50% sampling margin relative to an 8 kHz narrowband voice channel, while wideband speech remains compatible with the specified 7.0 kHz audio bandwidth. Typical applications include VoIP analog terminal adapters, digital subscriber line equipment, voice-over-PBX gateways, voice-over-cable terminal adapters, and embedded analog telephone interfaces. Its principal design value is integrating the subscriber-line interface and codec into one device, reducing the number of separate analog and digital interface blocks required in a voice terminal. Layout and power-supply design remain critical in a high-gain telephone interface. Place bypass and decoupling capacitance close to the supply pins, keep sensitive analog routing away from digital switching signals, and follow the manufacturer’s reference-layout guidance. Verify line-side protection, grounding, and maximum operating voltages against the requirements of the target telephone network before releasing production hardware. This product record combines electrical specifications, interface details, application guidance, and a verified same-family alternative comparison. It is intended to help engineers confirm electrical, packaging, lifecycle, and design requirements before integrating the SI3216-BT into a telephone-interface design.

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SI3216-FT

SI3216-FT 1-Channel SLIC Codec, 38-TSSOP | Silicon Labs

The Silicon Labs SI3216-FT is a single-channel Subscriber Line Interface Concept and codec integrated circuit with GCI, PCM, and SPI interfaces, supplied in a 38-pin TSSOP package. Its operating supply range is 3.13 V to 5.25 V, with an 88 mA supply current and a listed power dissipation of 700 mW. The device supports dual-mode wideband and narrowband voice operation, including wideband audio to 7 kHz and narrowband audio to 3.4 kHz. An SLIC is an analog telephone-line interface that provides the bridge between a conventional subscriber line and digital switching equipment. The integrated codec portion converts voice signals into digital PCM data, while the SLIC circuitry handles line-facing functions. The SI3216-FT belongs to the interface IC category, where signal conditioning, line-interface control, and voice encoding must operate together within strict supply and board-space constraints. The principal features include one SLIC channel, 16-bit voice sampling at 16 kHz, and support for GCI, PCM, and SPI control paths. These interfaces provide options for connecting the device to digital switching, channel-bank, or host-control circuitry. The 3.13 V minimum operating voltage permits integration with systems operating below the traditional 5 V supply level, while the 5.25 V maximum supports legacy 5 V infrastructure. The SI3216-FT combines narrowband and wideband voice support in one device. Narrowband operation reaches 3.4 kHz, while wideband operation extends to 7 kHz, allowing the same design framework to support conventional voice and higher-fidelity speech. The 38-TSSOP package provides a surface-mount form factor for compact telecommunications equipment, although its relatively long body requires careful PCB layout and adequate pin clearance. Typical uses include voice-over-IP terminals, subscriber-line access equipment, digital loop carriers, voice gateways, and fixed-line analog adapters. In these systems, the codec generates digital voice samples while the SLIC interface connects to an analog telephone line. The supported 16-bit, 16 kHz format can also simplify synchronization with compatible PCM processing paths. Designers should account for the 700 mW listed power dissipation and provide stable, low-noise supply rails around the 3.13 V to 5.25 V operating range. Place decoupling capacitors close to the supply pins and maintain the recommended layout around analog, digital, and line-interface circuitry. Confirm external line-network components, protection requirements, clocking, and interface levels against the manufacturer datasheet before production release. This page combines the core electrical specifications, interface choices, application guidance, and verified same-footprint alternatives for the SI3216-FT. It also highlights the distinction between electrically similar options so that replacement decisions can be based on package compatibility, supply operation, temperature grade, interface behavior, and documented performance rather than part-number similarity alone.

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SI3216-GT

SI3216-GT - Wideband ProSLIC Codec 38-TSSOP | Silicon Labs

The Silicon Labs SI3216-GT is a low-voltage CMOS ProSLIC analog telephone interface and audio codec with one subscriber line channel, 3.13 V to 5.25 V supply operation, and a 38-pin TSSOP package. It supports wideband and narrowband telephony audio through GCI, PCM, and SPI interfaces while providing 16-bit audio sampling at 16 kHz for enhanced voice quality. A ProSLIC, or Subscriber Line Interface Circuit, is an integrated analog telephone interface that connects a voice codec to a customer-premises line. The Si3216 combines line-interface and codec functions within a voice-over-IP access device, placing it in the hierarchy of telecom interface ICs, telephone-line interface circuits, codecs, and system semiconductors. Its wideband mode supports audio from 50 Hz to 7 kHz, while narrowband mode covers 200 Hz to 3.4 kHz. Key features include dual-mode audio operation, a 16-bit codec operating at a 16 kHz sample rate, and support for GCI, PCM, and SPI interfaces. The stated supply current is 88 mA, the listed power dissipation is 700 mW, and the documented operating-temperature range is -40°C to 85°C. These characteristics suit compact CPE designs requiring one analog line endpoint and digital voice transport. The Si3216 is designed for Voice-over-IP terminals, voice gateways, access equipment, and other CPE products that benefit from wider speech bandwidth than traditional 3.4 kHz telephony. Its digital interfaces allow the codec section to connect to a system controller or digital signal processor, while its analog telephone interface handles the subscriber line. The multiple interface options also support designs that use either serial packet audio or parallel PCM signaling. Designers should provide suitable line-interface protection and separation circuitry around the analog telephone section and verify the external network requirements of the target CPE design. Decoupling should follow the manufacturer datasheet recommendations, with short, low-inductance supply connections helping limit susceptibility to switching noise on digital and analog rails. This page organizes the key SI3216-GT operating limits, interface capabilities, application fit, and verified drop-in candidates. It also provides practical sourcing, package, thermal, and design guidance for engineers evaluating the part in legacy or ongoing voice-access hardware. Alternative sourcing, lifecycle confirmation, and current lead-time requests can be handled through the Request a Quote form on this page, while the manufacturer datasheet remains the controlling reference for pin connections and application implementation.

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SI3216-KT

SI3216-KT 38-TSSOP Wideband SLIC Codec | Silicon Labs

Silicon Labs SI3216-KT is a low-voltage CMOS ProSLIC integrated telephone interface and audio codec designed for Voice-over-IP equipment. The single-channel device supports wideband audio from 50 Hz to 7.0 kHz and narrowband audio from 200 Hz to 3.4 kHz, with 16-bit operation and 16 kHz sampling for wideband voice. It is packaged in a 38-pin TSSOP and operates from 3.13 V to 5.25 V. A Subscriber Line Interface Concept, or SLIC, is a semiconductor category that combines analog telephone-line interface functions with digital codec processing. In the power-management and communications hierarchy, the SI3216-KT belongs to the SLIC and codec class within interface ICs. Its purpose is to bridge a conventional analog telephone line and a digital voice-processing system, allowing a VoIP endpoint to support voice-band or wideband conversations while the host handles packetization and call control. The SI3216-KT combines wideband and narrowband codec modes in one device. The wideband path covers 50 Hz to 7.0 kHz, while the narrowband path covers 200 Hz to 3.4 kHz. According to the Silicon Labs Si3216 datasheet, it is a low-voltage CMOS device intended for enhanced-voice VoIP applications. Its listed operating supply range of 3.13 V to 5.25 V supports both 3.3 V and 5 V system rails, subject to the detailed limits and tolerances stated by the manufacturer. The component includes GCI, PCM, and SPI interfaces, giving a system designer several ways to connect the codec to external controller or line-interface circuitry. The verified specifications identify one codec circuit, 88 mA supply current, 700 mW power, a 0°C to 70°C operating range, and a 60 dB signal parameter in a 38-pin TSSOP package. Exact timing, line-driver current, gain distribution, hook-state thresholds, and absolute maximum limits must be taken from the manufacturer datasheet before final circuit design. Typical uses include VoIP analog telephone adapters, voice terminals, residential gateways, digital phone systems, and embedded voice processors. The wideband mode is useful when the network and signal chain can support a 16 kHz sampling rate, while narrowband mode preserves compatibility with conventional 200 Hz to 3.4 kHz telephony speech. The same-package SI3216M-KT and SI3216-FT are relevant cross-reference candidates for procurement and board-level planning, subject to suffix-specific qualification checks. The primary design consideration is the telephone line interface around the IC. A production design must follow the manufacturer’s recommended external network, protection, filtering, and component-selection circuits rather than treating the SI3216-KT as a standalone codec. PCB placement should minimize analog and digital coupling, provide appropriate ground-plane continuity, and place required bypass and interface components close to their associated pins. This product page consolidates the device’s electrical limits, package identity, operating modes, searchable specifications, comparison candidates, and application guidance. It also distinguishes verified SI3216-KT attributes from parameters that still require direct consultation of the manufacturer datasheet, helping engineers move from component identification to qualified design review without relying on generic SLIC assumptions.

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SI32171-C-GM1

SI32171-C-GM1 - 1-Channel FXS ProSLIC, 42-QFN | Skyworks

The Skyworks SI32171-C-GM1 is a single-channel ProSLIC (Subscriber Line Interface Concept) device in a 42-pin QFN (5x7 mm) package that delivers a complete foreign-exchange-station (FXS) telephony interface with integrated DC-DC controller, low-power ringing, and PCM/SPI host interface. It is rated for -110 V ringing operation, integrates DTMF detection, and supports both 3.3 V and 1.8 V I/O from a 3.3 V supply. A ProSLIC (Subscriber Line Interface Concept) is a highly integrated mixed-signal IC that replaces dozens of discrete components traditionally needed to interface a digital system-on-chip to the analog two-wire telephone subscriber line. In the system hierarchy, the ProSLIC sits between the host SoC (or DSP) and the tip/ring pair, performing the BORSCHT functions (Battery feed, Over-voltage protection, Ringing, Supervision, Coding, Hybrid, and Testing). As an FXS device, it provides the central office side of the analog subscriber loop and is fundamental to VoIP gateways, integrated access devices, and fixed-line terminal adapters. Key features include a complete single-channel FXS solution, automatic battery voltage generation via the integrated DC-DC controller, internal balanced or unbalanced ringing with patented low-power ringing, global programmability for LSSGR/ITU/ETSI line standards, simplified configuration/diagnostics, and DTMF detect on-chip. The 5x7 mm footprint and reduced BOM significantly shrink the PCB area versus discrete line-interface designs. Technically, the Si3217x family uses CMOS mixed-signal design with on-chip high-voltage charge-pump drivers, an integrated DC-DC switching controller that derives optimal battery voltages per line state, and a Sigma-Delta codec pair for the transmit/receive paths. The automatic battery-voltage tracking dynamically minimizes power dissipation in on-hook, off-hook, and ring states, while the low-power ringing architecture avoids the bulky external ring relay in many designs. Typical applications include VoIP residential gateways, xDSL integrated access devices (IADs), cable telephony eMTA, fiber-to-the-home (ONT/ONU) voice ports, fixed wireless terminals, and small-office/home-office analog terminal adapters (ATAs). It is also used in industrial remote-metering and alarm panels where a single analog FXS port is required. When designing with this part, attention must be paid to the DC-DC inductor selection, line-side protection component choice (over-voltage, surge, PTC), and PCB creepage/clearance between the high-voltage traces and the low-voltage digital interface. The exposed thermal pad must be soldered to a sufficient ground pour for heat dissipation during sustained off-hook or ring states. This page synthesizes distributor pricing, drop-in family variants, and practical design notes not found in the manufacturer datasheet alone, enabling faster BOM selection and supply-chain risk assessment for ProSLIC-based FXS designs.

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SI3220-BQ

SI3220-BQ Dual ProSLIC 3.3V/5V 64-TQFP | Silicon Labs

Silicon Labs SI3220-BQ is a dual-channel ProSLIC integrated circuit combining SLIC and codec functions in a 64-pin TQFP package. It operates from a single 3.3 V or 5 V supply, supports PCM, SPI, and GCI digital interfaces, and provides two analog telephone-line channels with integrated balanced ringing to 65 Vrms. The device consumes 65 mA and is specified for operation from -40 °C to +85 °C. A ProSLIC is a programmable subscriber-line interface circuit that consolidates multiple functions of a traditional analog telephone linecard. The SI3220 combines the SLIC, codec, and digital interface sections into one low-voltage CMOS device, while the companion Si3200 linefeed interface performs the external high-voltage functions. This division keeps high-voltage isolation and protection circuitry separate from the low-voltage signal-processing section. Key features include dual-channel operation, all BORSCHT functions, internal balanced ringing to 65 Vrms, low standby consumption, and support for applications up to 18 kft. The programmable digital interface can use standard PCM, SPI, or GCI connections, allowing the device to fit voice gateways, linecards, voice-over-packet systems, and digital PBX platforms. The 3.3 V and 5 V supply options provide flexibility across different linecard architectures. Internally, the SI3220 handles the low-voltage codec, line-driver, and digital control functions required by a dual analog channel. PCM or SPI connectivity carries voice and control traffic between the ProSLIC and host equipment, while GCI provides an alternative digital interface format. The companion Si3200 supplies the high-voltage linefeed path, including the external components needed to support ringing and telephone-line operation. Typical uses include two-channel analog telephone interfaces, broadband voice gateways, PBX linecards, Voice over Ethernet endpoints, digital loopback systems, and embedded voice adapters. For a new two-channel design, the SI3220-BQ is most suitable when the board architecture separates low-voltage codec and SLIC processing from high-voltage linefeed circuitry through Si3200 or Si3202 devices. The primary design consideration is the division between low-voltage and high-voltage sections. Maintain the isolation and creepage requirements of the telephone-line interface, place protection components near the line connectors, and validate the complete linecard against the applicable linefeed network and ringing requirements rather than relying on the SI3220 alone. This product data connects the SI3220-BQ specifications with compatible companion silicon, interface requirements, and design considerations, helping engineers identify the correct roles for the ProSLIC, linefeed interface, digital host interface, and external protection network.

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SI3220-FQ

SI3220-FQ - Dual-Channel SLIC/CODEC, 64-TQFP | Skyworks Solutions

The Skyworks Solutions SI3220-FQ is a dual-channel Subscriber Line Interface Concept and codec integrated circuit with GCI, PCM, and SPI interfaces, a 64-pin TQFP package measuring 10 mm by 10 mm, 3.3 V or 5 V operation, and a typical 65 mA supply current. It integrates two analog telephone-line channels with codec functionality for subscriber line access equipment. A SLIC is a semiconductor interface between a public switched telephone network line and a digital voice system, while a codec converts analog voice signals into digital PCM data. Integrating both functions into one IC reduces component count and simplifies dual-channel telephone interface designs. The SI3220-FQ supports GCI, PCM, and SPI control and data interfaces, allowing it to connect with a line-processing controller, DSP, or system processor. The SI3220-FQ performs the complete BORSCHT line-interface functions and supports applications operating with line lengths up to 18 kft. Its internal balanced ringing generator provides up to 65 Vrms, allowing the device to implement ringing on both channels without a separate balanced ringer circuit. These integrated functions reduce board area while retaining the line supervision, codec, and ringing capabilities required by analog telephone equipment. The device operates from either 3.3 V or 5 V and has a listed maximum power dissipation of 941 mW. Its specified operating-temperature range is 0°C to 70°C, making it appropriate for commercial-temperature subscriber line access, voice-over-IP endpoint, digital loop carrier, and analog telephone interface applications where environmental conditions remain within that range. Typical deployments include two-channel voice gateways, office telephone interfaces, central-office line cards, voice-over-IP adapters, and digital loop carrier equipment. The dual-channel architecture provides two analog line interfaces in one package, while the 64-TQFP construction simplifies assembly through standard surface-mount handling. Designers should follow the manufacturer pin-description table when assigning PCB tracks and should provide suitable bypass capacitors at the supply pins. Because the internal ringer can reach 65 Vrms, creepage, isolation, component spacing, and protection-network design require careful review. Confirm that the 0°C to 70°C temperature range, 941 mW power rating, and 18 kft application limit satisfy the intended deployment. This page combines the SI3220-FQ interface, channel-count, power, ringing, temperature, and package specifications with application guidance and a same-package selection analysis. It also distinguishes verified attributes from parameters that require confirmation in the manufacturer datasheet or design qualification process.

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SI3220-GQ

SI3220-GQ - Dual SLIC/CODEC 64-TQFP | Skyworks Solutions

The Skyworks Solutions Inc. SI3220-GQ is a dual-channel Subscriber Line Interface Concept and codec integrated circuit with 3.3 V and 5 V supply operation, 65 mA supply current, and a 64-TQFP package measuring 10 mm by 10 mm. It combines two analog telephone-line channels, voice codecs, line diagnostics, and internal balanced ringing up to 65 Vrms in one device. A Subscriber Line Interface Concept, or SLIC, is the analog front end of a telephone line. It replaces discrete circuits for line sensing, ring detection, codec control, voice conversion, and subscriber-line supervision. The SI3220-GQ combines SLIC and codec functions, placing two complete channel interfaces within the wider category of telecom interface ICs, communication semiconductors, and integrated voice-access systems. The device performs the BORSCHT functions required for analog telephone-line operation: battery feed, overvoltage protection, ring supervision, codec signaling, hybrid control, and test access. Its internal balanced ringing reaches 65 Vrms, removing the need for a separate external balanced-ringer circuit in supported designs. Internal diagnostics provide line-condition information that can simplify fault detection and subscriber-line testing. The SI3220-GQ accepts GCI, PCM, and SPI interfaces, allowing it to connect with a digital communications processor or other voice-processing controller. These digital interfaces place the device between the analog subscriber line and the system’s PCM processing fabric. Its low-voltage CMOS implementation supports both 3.3 V and 5 V environments, while low standby power is important in continuously connected voice-access equipment. Typical uses include two-channel voice cards, digital PBX line cards, Voice over IP terminal adapters, analog telephone interfaces, central-office equipment, and other subscriber-line access systems. It is particularly suitable when both phone lines and voice-codec functions must fit into a compact 10 mm by 10 mm package without separate ringing generation. Designers should preserve adequate line-driver and ringing margins, follow the manufacturer’s external component and layout guidance, and validate the complete telephone interface against the intended application. The 941 mW listed power value and 65 mA supply current require attention to supply routing, thermal performance, and bypass-capacitor placement during multi-channel board design. This product data combines the SI3220-GQ’s channel configuration, interface types, power characteristics, ringing capability, package details, and verified ordering alternatives with engineering guidance for telecom line-card implementation. It also distinguishes confirmed package-compatible options from replacements that would require functional and board-level requalification.

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SI3220-KQ

SI3220-KQ - Dual-Channel SLIC/Codec | Skyworks Solutions

Skyworks Solutions Inc. SI3220-KQ is a dual-channel Subscriber Line Interface Concept and codec integrated circuit with GCI, PCM, and SPI interfaces, a 65 mA supply current rating, and a 64-pin TQFP package measuring 10 mm by 10 mm. It combines two analog telephone-line channels with codec functionality and supports 3.3 V and 5 V supply operation. The device also provides internal balanced ringing up to 65 Vrms and internal diagnostics. A SLIC is the analog front end used to connect a subscriber telephone line to a digital communications system. By integrating the SLIC, codec, line-driver circuitry, ringing generation, and diagnostics, the SI3220-KQ reduces the component count required for dual-channel analog telephone equipment. In the component hierarchy, it is a telecom interface IC, a line-management IC, and a programmable CMOS SLIC/codec. The device performs the BORSCHT line functions and is identified for applications supporting lines up to 18 kft. Its interfaces support GCI, PCM, and SPI connectivity, allowing it to operate within digital line-card or voice-processing architectures. The internal balanced ringer reaches 65 Vrms, while internal diagnostics support board-level testing of the telephone interface. Its 65 mA supply-current rating and 941 mW listed power figure should be checked against the final rail topology and operating loads. The SI3220/Si3225 family uses programmable low-voltage CMOS circuitry to combine subscriber-line interface and codec functions in accordance with LSSGR, ITU, and ETSI specifications. This integration can simplify the voice path, reduce external glue logic, and shorten development time for dual-channel analog telephone adapters, voice-over-IP terminal equipment, and embedded voice gateways. Typical uses include dual-channel voice gateways, analog telephone line adapters, digital PBX line cards, embedded voice servers, and telecom access equipment. The SI3220-KQ is particularly relevant when one board must support two subscriber lines and when internal ringing and diagnostics can reduce external circuitry. Design carefully around the 64-pin TQFP footprint, exposed analog supply connections, line-interface protection, and the high-voltage ringing path. Use the manufacturer reference design and datasheet application circuit for component values and layout because line-interface networks and protection arrangements are tightly coupled to PCB routing and creepage requirements. This product record combines the part-specific electrical data, package information, interface options, application guidance, and engineering trade-offs needed to evaluate the SI3220-KQ for a dual-channel analog telephone design.

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الفئات الفرعية

المنتجات (38,000+)

SI3201-FS 100V Linefeed Interface IC | Skyworks | 16-SOIC

SI3201-GS - Programmable CMOS SLIC with 90 V Ringing | Silicon Laboratories

SI3201-KS - Programmable CMOS SLIC with Ringing | Silicon Labs

SI3210-BT - Programmable SLIC/CODEC with Ringing | Skyworks

SI3210-FT - 1-Channel ProSLIC SLIC/CODEC | Silicon Labs

SI3210-GT - Programmable CMOS SLIC/CODEC | Skyworks Solutions

SI3211-BT - Single-Channel SLIC/Codec | Skyworks Solutions

SI3211-KT - Single-Channel SLIC/Codec | Silicon Labs

SI3215-BT - Programmable SLIC/Codec | Silicon Labs

SI3215-C-FM - ProSLIC SLIC/Codec with 90VPK Ringing | Skyworks

SI3215-FM - ProSLIC Programmable CMOS SLIC/Codec, 5 REN, 90Vpk | Skyworks

SI3215-FT - 90 VPK Programmable SLIC/Codec | Silicon Labs

SI3215-GT - Programmable CMOS SLIC/CODEC | Silicon Labs

SI3215-KT - 90 VPK Programmable SLIC/Codec | Silicon Labs

SI3215M-C-FMR - Single-Channel SLIC/Codec w/ MOSFET DC-DC | Skyworks

SI3216-BT - 38-TSSOP Voice SLIC/CODEC | Silicon Labs

SI3216-FT 1-Channel SLIC Codec, 38-TSSOP | Silicon Labs

SI3216-GT - Wideband ProSLIC Codec 38-TSSOP | Silicon Labs

SI3216-KT 38-TSSOP Wideband SLIC Codec | Silicon Labs

SI32171-C-GM1 - 1-Channel FXS ProSLIC, 42-QFN | Skyworks

SI3220-BQ Dual ProSLIC 3.3V/5V 64-TQFP | Silicon Labs

SI3220-FQ - Dual-Channel SLIC/CODEC, 64-TQFP | Skyworks Solutions

SI3220-GQ - Dual SLIC/CODEC 64-TQFP | Skyworks Solutions

SI3220-KQ - Dual-Channel SLIC/Codec | Skyworks Solutions