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SI3225-BQ

SI3225-BQ Dual-Channel SLIC/CODEC | Silicon Laboratories

The Silicon Laboratories SI3225-BQ is a dual-channel, low-voltage CMOS Subscriber Line Interface Circuit and codec integrated into one 64-pin TQFP device. It supports 3.3 V and 5 V supply operation, has two analog telephone channels, and uses PCM, SPI, and GCI interfaces. The SI3225-BQ provides a complete dual-channel analog telephone interface for connected voice systems and is associated with LSSGR, ITU, and ETSI telephone-interface requirements. A SLIC is the analog front end of a voice subscriber line, while a CODEC converts between analog voice signals and digital PCM data. The SI3225 family combines these functions into a single CMOS IC, reducing the number of discrete telephone-interface components required by a central office, voice gateway, line card, or access-equipment design. Its dual-channel architecture allows one physical device to service two subscriber lines while sharing control, clock, and power circuitry. The SI3225-BQ supports both 3.3 V and 5 V supply configurations and has a listed maximum supply current of 65 mA. Its operating temperature range is -40°C to 85°C, with a listed maximum power dissipation of 941 mW. These ratings make the device appropriate for industrial and communications equipment that must operate from a controlled 3.3 V or 5 V system rail. The 64-pin TQFP package also provides a standardized surface-mount format for high-density line-card designs. Programmable CMOS integration gives the device a defined role in a telephone-line interface rather than a general-purpose signal path. The SI3225 family performs the BORSCHT line functions, supports external bulk ringer operation, and is intended for line lengths up to 18 kft. Its integrated SLIC and codec architecture simplifies the relationship between the physical analog line and the host PCM or GCI data interface, while internal control supports predictable telephone-network behavior. Typical applications include two-channel analog telephone line cards, voice-over-IP access equipment, central-office line interfaces, digital loopback and line-testing systems, and embedded voice gateways. In each design, the host processor must configure the device and exchange PCM traffic through a supported serial interface. The device is most suitable where two independent analog lines, digital voice conversion, and compact surface-mount integration are required in the same subsystem. Design attention should focus on the 3.3 V or 5 V supply implementation, analog telephone-line routing, external bulk-ringer support, and the host interface configuration. Keep sensitive analog and line-driver traces away from high-current switching paths, follow the package and reference-design layout guidance, and verify thermal performance against the 941 mW maximum rating under worst-case line activity. Firmware and line-card validation must also confirm BORSCHT and network requirements for the intended deployment. This product page combines the SI3225-BQ family specifications, interface and application context, verified source links, and engineering-focused design considerations. It also distinguishes temperature-ordering alternatives from functional replacements so procurement and design teams can assess compatibility without treating merely similar codecs as true drop-in devices.

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SI3225-FQ

SI3225-FQ Dual-Channel SLIC/Codec IC | Silicon Labs

The Silicon Labs SI3225-FQ is a dual-channel, low-voltage CMOS SLIC/codec integrated circuit for analog telephone-line interfaces, integrating the Subscriber Line Interface Circuit and codec functions in one 64-lead TQFP package. It provides two telephone channels, external ringing support, and internal diagnostics for communications equipment. A SLIC/codec, also called a ProSLIC, combines the line-driving and voice-processing functions required at the network edge. Within the product hierarchy, a SLIC/codec is a telecommunications interface IC, a mixed-signal semiconductor, and a system-level interface between a voice codec and the analog telephone line. The integrated architecture reduces the number of separate analog components while centralizing line supervision, voice processing, and diagnostic functions. The SI3225-FQ supports two independent analog channels in a single device, making it suitable for dual-channel line cards, voice gateways, embedded telephony systems, and customer-premises equipment. Its internal diagnostics assist development and troubleshooting, while external ringing support extends the available line-function capabilities without requiring the same external support arrangement for every design. The SI3225 series is described as a low-voltage CMOS dual ProSLIC platform designed for complete dual-channel analog telephone interfaces. The SI3225 family is associated with LSSGR, ITU, and ETSI interface requirements. Because line-card designs remain sensitive to codec behavior, ringing voltage, impedance, and channel configuration, engineers should preserve the silicon revision, device variant, and firmware configuration associated with the original qualified design. Typical deployments include two-channel analog adapters, voice-over-IP terminal equipment, digital transport cards, and legacy telephone interface equipment being modernized around an existing analog line. Two integrated channels can also reduce routing density and component count when the board must terminate two analog lines in a constrained area, although the line interface still requires the appropriate protection, isolation, and network-side components specified by the system design. During design review, check the SI3225 pin-description table in the manufacturer datasheet before assigning PCB tracks, and validate the external ringing network against the selected line-country configuration. Use the same variant and software configuration for production units, because changing ringing, impedance, or codec behavior may require renewed line-interface qualification even when the package and board footprint remain unchanged.

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SI3225-KQ

SI3225-KQ - Dual-Channel SLIC/Codec TQFP-64 | Silicon Laboratories

The Silicon Laboratories SI3225-KQ is a dual-channel SLIC/codec telecom line interface IC operating from a 3.3 V or 5 V supply, with an external bulk-ringer support feature and internal diagnostics. It is packaged in a 64-pin thin quad flat package (TQFP) and implements the high-voltage line functions required by analog telephone interfaces. The device contains two line circuits and supports GCI, PCM, and SPI interfaces according to its published specifications. A SLIC/codec is an integrated analog telephone line interface that combines the subscriber-line termination and codec functions required between a telephone network and digital voice equipment. In the hierarchy, a SLIC/codec belongs to the broader category of telecom interface ICs, combines analog line-interface and codec functions in one semiconductor, and serves as the bridge between external telephone-line circuitry and a digital voice system. The SI3225 family is specifically positioned for dual-channel analog telephone interfaces. Key characteristics include two line circuits, a 65 mA supply current rating, operation from either 3.3 V or 5 V, and a 941 mW power rating. The SI3225 supports external bulk-ringer circuitry, while the related Si3200 series also addresses ringing functions. According to the family documentation, the Si3200 linefeed interface family performs all high-voltage functions and can operate from 3.3 V, 5 V, single-battery, or dual-battery supplies, depending on the device and external circuit configuration. The SI3225 integrates both SLIC and codec functionality into a single IC. Its published interface options include GCI, PCM, and SPI, providing selectable pathways for connecting the device to a voice-processing system. The two-circuit architecture supports dual-channel line-card designs while reducing the number of separate analog-interface devices required. Internal diagnostics add observability for system troubleshooting, and the external bulk-ringer support broadens the available linepower design options. Typical uses include analog telephone adapters, voice-over-IP line interfaces, customer-premises equipment, digital PBX line cards, voice gateways, and dual-channel VoIP terminal designs. It is particularly relevant where a compact two-line interface is required and external protection, transformers, ringing, and line-interface networks can be implemented around the IC. System design requires careful separation between low-voltage digital circuitry and telephone-line high-voltage functions. Review the manufacturer pin-description table and recommended external networks before assigning nets. The 0 °C to 70 °C operating range is suitable for commercial-temperature equipment, but it requires confirmation against the enclosure temperature and applicable system qualification requirements. This product record combines the verified electrical and package characteristics, interface options, functional family information, and application guidance for the SI3225-KQ. It also identifies the limits of current cross-reference results and distinguishes a genuine pin-compatible replacement from a merely similar telecom interface device.

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SI3230-KT

SI3230-KT - Programmable CMOS SLIC with Ringing | Skyworks

Skyworks Solutions Inc. SI3230-KT is a single-channel, programmable CMOS subscriber line interface circuit with integrated balanced ringing and battery-voltage generation. The device supports internal ringing up to 90 VPK, five REN operation at 4 kft, three REN operation at 8 kft, DTMF generation and decoding, and a software-programmable codec interface. It is intended for 3.13 V to 5.25 V telecommunications equipment and is offered in a surface-mount 38-pin package. A subscriber line interface circuit, or SLIC, is the analog line-side component of a voice-over-packet or legacy telephone system. It connects the telephone line to a digital voice processor, supervises the line state, generates dial and ring signals, and helps establish the DC line voltage required by conventional handsets. Within the communications hierarchy, the SI3230-KT is a ProSLIC integrated circuit that combines line-interface functions with programmable ringing and battery supply generation rather than relying on a large collection of discrete telephone-line components. The main advantages of the SI3230-KT are integration and configuration flexibility. Its software-programmable internal ringing generator supports balanced ring voltages as high as 90 VPK, while the integrated battery supply provides dynamic line-voltage generation. Software control also enables DTMF signaling and codec-interface adjustment, allowing one hardware design to support multiple ringing and line-state requirements. The codec interface integrates the SLIC with a companion digital voice processor without requiring a separate physical telephone line for every configuration. The SI3230-KT includes a BJT/inductor DC-DC converter for the battery supply, as described in the manufacturer documentation. This converter supports the elevated DC and ringing voltages required by analog subscriber lines. Because the converter, ringing generator, battery supply, and signaling logic share one integrated package, the design must account for both analog line quality and the switching energy associated with generating ring voltage. Component selection for the external inductor and energy-storage network should follow the reference configuration and required ringing cadence in the datasheet. Typical applications include Voice over IP endpoint designs, digital subscriber line equipment, analog terminal adapters, voice gateways, embedded telephony controllers, and centralized telephone line cards. The device is particularly suitable when a compact single-channel solution is needed for line supervision, hook detection, DTMF handling, ringing generation, and codec interfacing. In multichannel equipment, several SI3230-KT devices may be arranged around a common voice processor, subject to channel-to-channel isolation, thermal, and routing requirements. Designers should preserve the separation between the line-side and codec-side circuitry, use the recommended ringing and battery-supply external components, and route sensitive analog and high-voltage ring-node connections carefully. The 3.13 V to 5.25 V supply requirement and approximately 88 mA supply current must be accommodated by the host power supply. Because the package exposes high-voltage line functions, board cleanliness, insulation spacing, and protection strategy are as important as low-noise digital layout. This product page combines the principal line-interface capabilities, package constraints, sourcing guidance, and design considerations needed to evaluate the SI3230-KT. It also distinguishes documented device features from parameters that require confirmation against the latest manufacturer datasheet, helping engineers assess it for telecom and embedded voice applications without changing the PCB footprint during early design review.

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SI3232-BQ

SI3232-BQ - Dual-Channel Programmable CMOS SLIC | Skyworks

Skyworks Solutions Inc. SI3232-BQ is a low-voltage CMOS subscriber line interface circuit, or SLIC, with a dual-channel architecture and fully software-programmable analog telephone-interface functions for customer premise equipment applications. The verified product information identifies the device as a 64-pin TQFP package, although electrical ratings, temperature limits, clock requirements, and detailed pin assignments were not included in the supplied records. A SLIC is an integrated telephone-interface circuit that belongs to the broader telecommunications interface IC category. It provides the analog line-facing functions required when equipment connects to a telephone network, while allowing switching, supervision, and line-state behavior to be managed by software. In a dual-channel implementation, two analog line interfaces can be controlled from one programmable device, reducing component count compared with separate single-channel solutions. The SI3232's defining verified feature is full software programmability. This allows a customer premise equipment designer to configure line behavior through associated control software instead of relying entirely on fixed hardware settings. Dual-channel integration is particularly useful where two telephone lines must be handled within a compact endpoint, gateway, voice terminal, or analog line-card assembly. The specific programmable functions, register map, and host interface are not present in the supplied snippets. As a low-voltage CMOS IC, the SI3232 combines its analog telephone interface and digital control functions on one monolithic device. CMOS construction is broadly used for low-power integrated circuits because it can support dense digital logic at comparatively low supply voltages, although an exact operating-voltage range cannot be asserted from the supplied data. The 64-TQFP package provides a substantial pin count for two channels, line-state sensing, control connections, analog interfaces, and power or ground assignments. Typical applications include analog telephone adapters, voice-over-IP gateways, customer premise equipment, small telephone line cards, and other dual-line endpoints that require programmable analog line interfacing. For these systems, integration can simplify board partitioning and provide coordinated control of both channels. Designers must still verify line impedance, DC feed characteristics, ring-voltage requirements, codec connections, protection strategy, and regional regulatory behavior against the complete manufacturer documentation. The principal design consideration is that a SLIC is a specialized line-facing device rather than a general-purpose amplifier or codec. Its analog inputs and outputs must be paired with appropriate protection, filtering, routing, and layout measures, while its digital control interface must match the host processor and firmware architecture. Board design should preserve the pin assignments, grounding strategy, and decoupling recommendations contained in the complete SI3232 documentation. This page consolidates the verified product identity, package information, source links, and application context for SI3232-BQ while clearly separating verified facts from unavailable electrical data. The referenced datasheet and product listings should be used to confirm the complete electrical limits, pinout, lifecycle status, current price, and availability before committing a production design.

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SI3232-FQ

SI3232-FQ - Dual-Channel 3.3V ISDN SLIC | Silicon Labs

Silicon Labs SI3232-FQ is a dual-channel, fully programmable CMOS Subscriber Line Interface Circuit (SLIC) with a 3.13 V to 3.47 V supply range, 28 mA operating current, and a 64-TQFP 10 mm × 10 mm package. The device integrates balanced ringing up to 65 Vrms and is designed for customer-premise equipment, including ISDN and analog telephone interfaces. Its low-voltage CMOS implementation supports two subscriber lines while limiting standby power to less than 65 mW per channel. A Subscriber Line Interface Circuit, or SLIC, is an integrated-circuit category within analog and telecom interface ICs. It connects a telephone line to a digital or voice-processing system, providing line supervision, DC feed, ring generation, caller-status signaling, and the analog termination required for voice-band operation. In the electronics hierarchy, the SI3232-FQ is a dual-channel SLIC, a telecom interface IC, and ultimately a semiconductor designed for customer-premise telephony equipment. Key features include two integrated analog channels, software-programmable operation, internal balanced ringing rated to 65 Vrms, and low standby consumption below 65 mW per channel. The 3.3 V supply operation is suitable for modern embedded voice systems, while the 28 mA operating current helps control total board-level consumption. Its 64-TQFP package provides a compact surface-mount footprint for CPE designs requiring two telephone interfaces. The SI3232-FQ uses a low-voltage CMOS architecture and combines line-interface functions that would otherwise require multiple discrete or integrated circuits. The -FQ ordering code identifies the lead-free 64-TQFP package associated with a 10 mm × 10 mm body. Because this is a high-voltage telephone-interface device, correct isolation, protection, component spacing, and board-layout practices remain essential even though its logic supply is only 3.3 V. Typical uses include ISDN terminal adapters, VoIP phones, voice gateways, customer-premise analog phone adapters, small-business telephone systems, and embedded telephony equipment. In each case, the two channels can serve separate subscriber lines while software control configures line behavior and monitoring functions. The device is particularly relevant where a compact, integrated SLIC is preferred over discrete line-driver circuitry. Designers should not assume that the 3.3 V logic supply is the only voltage present at the line pins. Balanced ringing can reach 65 Vrms, so external protection, insulation coordination, and creepage or clearance planning must satisfy the applicable telephone-interface requirements. Decoupling should be placed close to the supply pins, and the complete line network should be validated under off-hook, on-hook, surge, and ringing conditions. This product record combines verified distributor specifications, source-backed interface characteristics, and design guidance focused on the SI3232-FQ. It also distinguishes the confirmed SI3232-G-FQ cross-reference candidate from unverified alternatives, avoiding unsupported claims about pin-compatible parts while helping engineers evaluate the original dual-channel SLIC for legacy CPE, ISDN, and VoIP designs.

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SI3232-KQ

SI3232-KQ - Dual-Channel Programmable SLIC | Silicon Labs

The Silicon Laboratories SI3232-KQ is a low-voltage CMOS subscriber line interface circuit (SLIC) providing two programmable analog telephone channels for customer premise equipment. It operates from a single 3.3 V supply, communicates through a standard SPI digital interface, and is offered in a 64-pin TQFP package. The SI3232 performs the programmable SLIC functions, while the external Si3200 linefeed interface IC performs the associated high-voltage functions. A SLIC is an integrated telephone-interface device that combines programmable analog voice-channel functions with digital control. It belongs to the interface IC hierarchy, connecting a voice codec or system controller to an analog telephone line. The SI3232-KQ targets CPE designs requiring two channels, centralized register configuration, and a compact low-voltage CMOS implementation. The device provides dual-channel SLIC functionality, a 3.3 V single-supply operating requirement, and a standard SPI control interface. These features make it suitable for voice gateways, digital subscriber line equipment, analog telephone adapters, and other multi-channel voice systems. Programmability allows the controller to configure channel behavior through the serial interface instead of requiring separate fixed-function logic for each line. Its architecture separates low-voltage channel processing from high-voltage linefeed functions. According to the supplied Silicon Laboratories datasheet, the SI3232 performs all programmable SLIC functions, whereas the Si3200 performs all high-voltage functions. This division limits high-voltage handling to the dedicated linefeed IC while allowing the SI3232-KQ to operate from 3.3 V CMOS supply rails. Typical applications include two-channel analog telephone interfaces, customer premise equipment, voice-over-packet gateways, and telecom access products that require software-controlled SLIC operation. A system implementation must also account for the external Si3200, external line protection, and the separation between low-voltage logic and high-voltage telephone-line functions. The principal design consideration is system partitioning. The SI3232-KQ should not be treated as a complete standalone line interface: it requires the Si3200 for high-voltage functions, suitable bypass components, careful SPI control, and application-specific protection. Verified pin-level connection and absolute timing limits should be checked against the manufacturer datasheet before layout release. This page consolidates the verified SI3232-KQ product facts, identifies the Si3200 companion device, and separates documented characteristics from parameters that require datasheet confirmation. It also highlights sourcing and replacement constraints that are not resolved by generic SLIC cross-reference results.

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SI4112-BM

SI4112-BM - 1 GHz IF Synthesizer | Silicon Labs

Silicon Labs SI4112-BM is a 1 GHz frequency-synthesizer IC with an integrated VCO, supplied in a 28-pin MLP package with an exposed pad. It is intended for IF signal generation in wireless communications equipment and is listed as an obsolete EOL device. The verified distributor listing identifies one synthesizer circuit, surface mounting, a 5x5 mm package, and an operating range of -40°C to 85°C. The Si4112-D family performs IF and dual-band RF synthesis, reducing external passive components and eliminating external VCOs and varactor diodes according to the manufacturer product-page result. A frequency synthesizer is a clock-and-timing integrated circuit that generates a controlled output frequency from a reference source. The PLL and integrated VCO provide a compact way to produce stable intermediate-frequency signals in RF receivers, transmitters, and communication systems. In the product hierarchy, this part is a frequency-synthesizer IC, then a PLL/clock-and-timing IC, then a timing and RF synthesis building block within a wireless communication system. The verified listing gives the device's headline frequency capability as 1 GHz. Its 28-VFQFN exposed-pad package is intended for compact surface-mount designs and provides a defined thermal and electrical land pattern. Because the exposed pad is part of the package, the PCB footprint must include the manufacturer's recommended thermal-pad connection and layout. The listed operating temperature range is -40°C to 85°C. Other detailed electrical timing, phase-noise, current, supply-voltage, and tuning-range values were not included in the supplied data and must be confirmed from the manufacturer datasheet before design release. Typical applications include IF synthesis in wireless personal communications, RF receiver and transmitter signal chains, and other communication systems requiring a compact integrated synthesizer. The integrated VCO can reduce the external component count compared with a discrete VCO implementation, but it does not remove the need to validate loop stability, reference noise, tuning range, output drive, and layout performance. The principal design consideration is lifecycle risk: SI4112-BM is marked obsolete in the verified GlobalSpec result. For new production, evaluate an active replacement only after checking its frequency range, package, pinout, supply voltage, reference requirements, and RF performance. Treat distributor inventory as temporary and validate the specific lot before committing to a long-term design. This page consolidates the verified manufacturer and distributor information, explicit lifecycle status, package identity, and sourcing context. It also records missing datasheet parameters rather than inferring them, while the comparison and application notes help engineers distinguish an obsolete but documented device from an unverified substitute.

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SI4112-BT

SI4112-BT - 1 GHz Dual-Band RF Synthesizer | Silicon Labs

The Silicon Labs SI4112-BT is a 1 GHz dual-band RF frequency-synthesizer IC with integrated VCOs for wireless communications, supplied in a 24-pin TSSOP package measuring 4.40 mm wide. Its headline characteristics are a 1 GHz maximum stated frequency, one RF output according to the verified distributor listing, and a 24-TSSOP surface-mount package. The SI4112-BT is intended for wireless communication systems requiring programmable high-frequency signal generation with integrated voltage-controlled oscillators. An RF synthesizer is a clock-and-timing semiconductor that generates a controlled output frequency from a reference source. In the broader hierarchy, this product is an RF frequency synthesizer, part of clock and timing ICs, and ultimately a semiconductor used to establish the carrier or local-oscillator signal in a wireless transmitter or receiver. Its integrated VCOs reduce the number of separate frequency-generation components needed in RF designs. The verified distributor information identifies the SI4112-BT as a frequency-synthesizer IC operating up to 1 GHz and packages it as 24-TSSOP, or 0.173-inch by 4.40 mm width. Search results also describe the device as a dual-band RF synthesizer with integrated VCOs for wireless communications. Detailed phase-noise, tuning-range, supply-voltage, output-power, temperature, and lock-time figures were not included in the supplied source data and should be confirmed from the manufacturer datasheet before design release. The SI4112-BT fits RF front ends, wireless transceivers, local-oscillator generation, modulation and demodulation chains, and communication equipment requiring a programmable RF reference. Integrated VCOs are particularly useful when board area and external frequency-generation complexity are priorities, although loop-filter, reference, and RF-layout requirements still need careful validation. For a new layout, preserve the 24-TSSOP footprint and verify every pin function against the applicable datasheet revision. Do not infer programming, charge-pump, reference, or supply connections from the family description alone; the supplied evidence confirms the device identity and broad frequency-synthesizer role, but not a complete electrical pin map. Validate RF trace impedance, keep the synthesizer reference path short, and test tuning and lock behavior across the intended channel plan.

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SI4112-D-GT

SI4112-D-GT - 1 GHz Dual-Band RF Synthesizer | Skyworks

Skyworks SI4112-D-GT is a 1 GHz dual-band frequency-synthesizer IC with integrated VCOs, an IF output, and a 24-pin TSSOP package measuring 0.173 inch wide by 4.40 mm. The verified distributor listing identifies it as a PLL RF synthesizer for wireless communications, while the manufacturer describes it as a low-noise RF frequency-synthesis solution for price-sensitive, low-power personal wireless systems. A frequency synthesizer is a phase-locked-loop timing and RF component that locks a voltage-controlled oscillator to a stable reference frequency. The SI4112 family integrates the VCO circuitry and associated RF functions, reducing the need for external VCOs, varactor diodes, and passive networks. The manufacturer specifically identifies dual-band and IF synthesis as useful functions for wireless personal-communications equipment. The verified product data establishes a maximum listed frequency of 1 GHz and a single output channel. It also identifies a 24-TSSOP surface-mount package with a 0.173-inch body width and 4.40 mm overall width. Skyworks states that the integration can reduce external passive-component count, eliminate external VCOs and varactor diodes, and improve power efficiency compared with less-integrated implementations. This device belongs to the RF synthesizer hierarchy: RF frequency synthesizer → PLL → clock and timing IC → integrated circuit. Its integrated VCO architecture makes it relevant to compact wireless receivers and transmitters where board area, external component count, and power efficiency are important. The provided sources describe the part for wireless personal communications rather than high-end test equipment or precision instrumentation. Typical uses include RF down-conversion and up-conversion systems, wireless communication transceivers, and compact RF signal chains requiring programmable frequency generation. The IF output allows the synthesized signal to be used as an intermediate-frequency source in a receiver or transmitter architecture. The available verified data does not establish exact operating voltage, tuning range, phase-noise values, output power, temperature limits, or pin-level electrical limits. Designers should verify the complete manufacturer datasheet before layout or RF matching. The 24-pin TSSOP footprint requires careful high-frequency routing, controlled ground return paths, and decoupling close to the device pins. Because this is a frequency-sensitive RF component, component tolerances, reference-frequency stability, loop-filter implementation, and output matching can materially affect system performance. This page consolidates verified distributor identity, package information, manufacturer application context, pricing fields marked as data-needed, and replacement-search limitations for SI4112-D-GT. It does not invent undocumented electrical ratings or treat generic cross-reference search results as verified drop-in equivalents.

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SI4112-D-GTR

SI4112-D-GTR - 1 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

Skyworks SI4112-D-GTR is a 1 GHz dual-band frequency-synthesizer IC with integrated VCOs, an IF output, and a 24-pin TSSOP package measuring 0.173 inch wide by 4.40 mm. The verified distributor listing identifies it as a PLL RF synthesizer for wireless communications, while the manufacturer describes it as a low-noise RF frequency-synthesis solution for price-sensitive, low-power personal wireless systems. A frequency synthesizer is a phase-locked-loop timing and RF component that locks a voltage-controlled oscillator to a stable reference frequency. The SI4112 family integrates the VCO circuitry and associated RF functions, reducing the need for external VCOs, varactor diodes, and passive networks. The manufacturer specifically identifies dual-band and IF synthesis as useful functions for wireless personal-communications equipment. The verified product data establishes a maximum listed frequency of 1 GHz and a single output channel. It also identifies a 24-TSSOP surface-mount package with a 0.173-inch body width and 4.40 mm overall width. Skyworks states that the integration can reduce external passive-component count, eliminate external VCOs and varactor diodes, and improve power efficiency compared with less-integrated implementations. This device belongs to the RF synthesizer hierarchy: RF frequency synthesizer → PLL → clock and timing IC → integrated circuit. Its integrated VCO architecture makes it relevant to compact wireless receivers and transmitters where board area, external component count, and power efficiency are important. The provided sources describe the part for wireless personal communications rather than high-end test equipment or precision instrumentation. Typical uses include RF down-conversion and up-conversion systems, wireless communication transceivers, and compact RF signal chains requiring programmable frequency generation. The IF output allows the synthesized signal to be used as an intermediate-frequency source in a receiver or transmitter architecture. The available verified data does not establish exact operating voltage, tuning range, phase-noise values, output power, temperature limits, or pin-level electrical limits. Designers should verify the complete manufacturer datasheet before layout or RF matching. The 24-pin TSSOP footprint requires careful high-frequency routing, controlled ground return paths, and decoupling close to the device pins. Because this is a frequency-sensitive RF component, component tolerances, reference-frequency stability, loop-filter implementation, and output matching can materially affect system performance. This page consolidates verified distributor identity, package information, manufacturer application context, pricing fields marked as data-needed, and replacement-search limitations for SI4112-D-GTR. It does not invent undocumented electrical ratings or treat generic cross-reference search results as verified drop-in equivalents.

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SI4113-BT

SI4113-BT - 1.8 GHz Dual-Band RF Synthesizer | Silicon Labs

The Silicon Labs SI4113-BT is a 1.8 GHz dual-band RF frequency-synthesizer IC with integrated VCOs and RF outputs, supplied in a 24-pin TSSOP package. It operates from a 2.7 V to 3.6 V supply, provides programmable power-down modes, and draws 18 mA typical supply current while offering 1 µA standby current. The verified listing identifies the device as a frequency synthesizer with a 1:1 input-to-output ratio. A frequency synthesizer is a phase-locked-loop building block that derives or generates stable RF carrier signals from a reference frequency. In the broader semiconductor hierarchy, a frequency synthesizer is a clock-and-timing IC, a PLL-based RF synthesizer, and ultimately a semiconductor used to control wireless transmitters and receivers. The SI4113-BT integrates VCOs, loop filters, and related RF synthesis functions to reduce the external-component count required for wireless communications designs. Key verified features include integrated VCOs and loop filters, operation at 3.6 V, a maximum operating temperature of +85 °C, and a 24-TSSOP package measuring 0.173 inches, or 4.40 mm, in width. The verified distributor description identifies the part as an RF synthesizer with RF1/RF2 outputs, while another source describes a dual-band architecture and harmonic suppression of -26 dBc. These features suit RF signal-chain designs where local frequency generation, channel selection, and compact implementation are important. The SI4113-BT is intended for wireless communications equipment using RF1 and RF2 synthesis paths. Its dual-band structure can support systems requiring more than one RF output or related modulation and frequency-generation functions. Because RF synthesizers are sensitive to loop stability, reference noise, supply variation, layout coupling, and unwanted harmonics, the power supply, reference path, decoupling network, and output transmission lines require careful PCB implementation. A primary design consideration is preserving the specified 2.7 V to 3.6 V supply range and providing clean decoupling close to the power pins. Designers should also verify the selected reference frequency, divider settings, loop-filter configuration, output frequency range, and RF trace impedance against the complete manufacturer datasheet before layout release. Use controlled-impedance routing and a compact RF return path to minimize unintended reflections and coupling. This page combines verified distributor specifications, sourcing information, available cross-reference results, and practical RF design guidance. It distinguishes confirmed SI4113-BT data from specifications that require datasheet confirmation, helping engineers evaluate the synthesizer before requesting procurement support.

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SI4113-D-GM

SI4113-D-GM - 1.8 GHz Dual-Band RF Synthesizer | Skyworks

The Skyworks Solutions SI4113-D-GM is a dual-band RF frequency-synthesizer IC with integrated VCOs for wireless communications. The supplied distributor data identifies a maximum frequency of 1.8 GHz, a 2.7 V to 3.6 V supply range, 18 mA to 27 mA current, RF1 and RF2 outputs, and a 28-pin VFQFN package with an exposed pad. It supports IF and dual-band low-noise RF frequency synthesis while reducing external passive-component requirements. A frequency synthesizer is a timing and RF signal-generation IC that combines frequency reference, phase detection, feedback-divider, voltage-controlled oscillator, and loop-filter functions into a controllable frequency-generation system. In the broader hierarchy, it belongs to clock and timing ICs, RF synthesizers, RF signal-generation devices, and wireless-communications semiconductors. Integrated VCOs reduce the need for discrete varactor diodes, external oscillators, and separate passive matching networks. The SI4113-D-GM is reported to operate across 900 MHz to 1800 MHz in one band and 750 MHz to 1500 MHz in the other. Its output power spans -14 dBm to +1 dBm, while harmonic performance is listed from -26 dBc to -20 dBc. These values make it relevant to compact wireless transmitters and receivers operating in cellular, personal-radio, and other RF communication bands. Its integrated synthesis architecture supports RF1 and RF2 outputs and is intended to isolate external interference in silicon. The 2.7 V to 3.6 V operating supply aligns with low-voltage portable RF systems. Reported current of 18 mA to 27 mA gives engineers a concrete starting point for power-budget analysis, although exact current depends on operating mode and output configuration. Typical uses include dual-band transceivers, wireless personal-communications equipment, IF synthesizers, and RF up-conversion or down-conversion chains. The component can simplify boards by consolidating frequency-generation functions, but RF layout still requires controlled impedance, short return paths, suitable grounding, and separation between sensitive synthesis nodes and radiating paths. Designers should verify the complete pinout, loop-filter guidance, reference requirements, and output-matching network in the manufacturer datasheet before layout. Supply decoupling should be placed close to the device, and the exposed pad needs the package-specific thermal and assembly treatment documented by Skyworks Solutions. The major engineering trade-off is board simplification versus careful RF routing and application-specific filter tuning. This page consolidates the verified manufacturer and distributor facts, distinguishes confirmed specifications from missing datasheet data, and provides practical replacement and selection guidance beyond a raw catalog listing. All prices and availability references use the verified retrieval date of 2026-10-22.

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SI4113-D-GMR

SI4113-D-GMR - 1.8 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

The Skyworks Solutions SI4113-D-GMR is a dual-band RF frequency-synthesizer IC with integrated VCOs for wireless communications. The supplied distributor data identifies a maximum frequency of 1.8 GHz, a 2.7 V to 3.6 V supply range, 18 mA to 27 mA current, RF1 and RF2 outputs, and a 28-pin VFQFN package with an exposed pad. It supports IF and dual-band low-noise RF frequency synthesis while reducing external passive-component requirements. A frequency synthesizer is a timing and RF signal-generation IC that combines frequency reference, phase detection, feedback-divider, voltage-controlled oscillator, and loop-filter functions into a controllable frequency-generation system. In the broader hierarchy, it belongs to clock and timing ICs, RF synthesizers, RF signal-generation devices, and wireless-communications semiconductors. Integrated VCOs reduce the need for discrete varactor diodes, external oscillators, and separate passive matching networks. The SI4113-D-GMR is reported to operate across 900 MHz to 1800 MHz in one band and 750 MHz to 1500 MHz in the other. Its output power spans -14 dBm to +1 dBm, while harmonic performance is listed from -26 dBc to -20 dBc. These values make it relevant to compact wireless transmitters and receivers operating in cellular, personal-radio, and other RF communication bands. Its integrated synthesis architecture supports RF1 and RF2 outputs and is intended to isolate external interference in silicon. The 2.7 V to 3.6 V operating supply aligns with low-voltage portable RF systems. Reported current of 18 mA to 27 mA gives engineers a concrete starting point for power-budget analysis, although exact current depends on operating mode and output configuration. Typical uses include dual-band transceivers, wireless personal-communications equipment, IF synthesizers, and RF up-conversion or down-conversion chains. The component can simplify boards by consolidating frequency-generation functions, but RF layout still requires controlled impedance, short return paths, suitable grounding, and separation between sensitive synthesis nodes and radiating paths. Designers should verify the complete pinout, loop-filter guidance, reference requirements, and output-matching network in the manufacturer datasheet before layout. Supply decoupling should be placed close to the device, and the exposed pad needs the package-specific thermal and assembly treatment documented by Skyworks Solutions. The major engineering trade-off is board simplification versus careful RF routing and application-specific filter tuning. This page consolidates the verified manufacturer and distributor facts, distinguishes confirmed specifications from missing datasheet data, and provides practical replacement and selection guidance beyond a raw catalog listing. All prices and availability references use the verified retrieval date of 2026-10-22.

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SI4113-D-GT

SI4113-D-GT - 1.8 GHz Dual-Band RF Synthesizer | Skyworks

Skyworks Solutions SI4113-D-GT is a dual-band RF frequency synthesizer IC with integrated VCOs, an operating frequency listed as 1.8 GHz, RF1 and RF2 outputs, and a 24-pin TSSOP package measuring 4.40 mm wide. It is a phase-locked-loop timing device intended for dual-band, low-noise wireless frequency synthesis. According to Skyworks product data, the SI4113 family reduces external passive-component count and eliminates external VCOs and varactor diodes. A frequency synthesizer generates or translates a stable, programmable reference into an RF carrier used by wireless transmitters, receivers, and related communication equipment. The SI4113-D-GT combines a phase-locked loop with integrated voltage-controlled oscillators and RF output circuitry. Its dual-band architecture supports wireless personal-communications designs where compactness, low power, and reduced external component count are important. The verified distributor information identifies RF1/RF2 outputs, a 1.8 GHz operating frequency, one synthesizer circuit, and a 24-pin TSSOP package. Skyworks states that the device targets price-sensitive, low-power, high-performance personal wireless communications by reducing passive components, eliminating discrete VCOs and varactor diodes, improving power efficiency, and isolating external interference in silicon. These features make it useful in RF modulation and demodulation chains requiring local frequency generation. The part also appears in distributor listings under both Skyworks Solutions and legacy Silicon Laboratories naming. This distinction matters when searching for documentation or inventory: the manufacturer history is reflected in the search results, while the current distributor records identify Skyworks Solutions. The exact RF output power, tuning range, phase-noise figures, supply voltage, and control-interface details were not included in the supplied records and require confirmation from the manufacturer datasheet. Typical design uses include dual-band wireless transceivers, RF modulators, RF demodulators, IF-generation stages, compact communications modules, and low-power RF front ends. In a transmitter, the synthesizer can create the carrier or intermediate frequency while the PLL locks its output to a stable reference. Designers should preserve controlled impedance on RF traces, provide suitable grounding and decoupling, and verify loop-filter settings against the intended channel plan. The main design tradeoff is integration versus specialized flexibility: integrated VCOs simplify the BOM and reduce external interference pickup, but RF performance, output power, and frequency limits must be confirmed against the exact system requirements. The verified source record does not provide a manufacturer datasheet URL, complete electrical limits, or a full pinout, so those details remain explicitly unconfirmed rather than inferred. This page combines distributor specifications, package information, source links, application guidance, and a strict validation framework so engineers can distinguish verified facts from parameters that must be checked in the manufacturer datasheet.

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SI4113-D-GTR

SI4113-D-GTR - 1.8 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

Skyworks Solutions SI4113-D-GTR is a dual-band RF frequency synthesizer IC with integrated VCOs, an operating frequency listed as 1.8 GHz, RF1 and RF2 outputs, and a 24-pin TSSOP package measuring 4.40 mm wide. It is a phase-locked-loop timing device intended for dual-band, low-noise wireless frequency synthesis. According to Skyworks product data, the SI4113 family reduces external passive-component count and eliminates external VCOs and varactor diodes. A frequency synthesizer generates or translates a stable, programmable reference into an RF carrier used by wireless transmitters, receivers, and related communication equipment. The SI4113-D-GTR combines a phase-locked loop with integrated voltage-controlled oscillators and RF output circuitry. Its dual-band architecture supports wireless personal-communications designs where compactness, low power, and reduced external component count are important. The verified distributor information identifies RF1/RF2 outputs, a 1.8 GHz operating frequency, one synthesizer circuit, and a 24-pin TSSOP package. Skyworks states that the device targets price-sensitive, low-power, high-performance personal wireless communications by reducing passive components, eliminating discrete VCOs and varactor diodes, improving power efficiency, and isolating external interference in silicon. These features make it useful in RF modulation and demodulation chains requiring local frequency generation. The part also appears in distributor listings under both Skyworks Solutions and legacy Silicon Laboratories naming. This distinction matters when searching for documentation or inventory: the manufacturer history is reflected in the search results, while the current distributor records identify Skyworks Solutions. The exact RF output power, tuning range, phase-noise figures, supply voltage, and control-interface details were not included in the supplied records and require confirmation from the manufacturer datasheet. Typical design uses include dual-band wireless transceivers, RF modulators, RF demodulators, IF-generation stages, compact communications modules, and low-power RF front ends. In a transmitter, the synthesizer can create the carrier or intermediate frequency while the PLL locks its output to a stable reference. Designers should preserve controlled impedance on RF traces, provide suitable grounding and decoupling, and verify loop-filter settings against the intended channel plan. The main design tradeoff is integration versus specialized flexibility: integrated VCOs simplify the BOM and reduce external interference pickup, but RF performance, output power, and frequency limits must be confirmed against the exact system requirements. The verified source record does not provide a manufacturer datasheet URL, complete electrical limits, or a full pinout, so those details remain explicitly unconfirmed rather than inferred. This page combines distributor specifications, package information, source links, application guidance, and a strict validation framework so engineers can distinguish verified facts from parameters that must be checked in the manufacturer datasheet.

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SI4113-D-ZT1

SI4113-D-ZT1 - Dual-Band 1.8GHz RF Synthesizer | Skyworks

The Skyworks Solutions, Inc. SI4113-D-ZT1 is a dual-band RF frequency synthesizer IC with a maximum RF1 output frequency of 1.8 GHz, a 2.7 V to 3.6 V supply range, and a 24-pin TSSOP package. It supports RF1 synthesis from 900 MHz to 1.8 GHz, RF2 synthesis from 750 MHz to 1.5 GHz, and IF synthesis from 62.5 MHz to 1 GHz. A frequency synthesizer is a clock-and-timing semiconductor that locks an internal voltage-controlled oscillator to a stable reference, allowing a system to generate programmable RF and intermediate-frequency signals. The SI4113-D-ZT1 belongs to the PLL frequency synthesizer family, combining phase-locked loops, voltage-controlled oscillators, frequency dividers, phase detectors, and loop filters in one integrated circuit. The device includes three synthesis paths, integrated VCOs, loop filters, varactors, and resonators. Its RF1 range extends to 1.8 GHz, RF2 reaches 1.5 GHz, and the IF path covers 62.5 MHz to 1 GHz. Programmable power-down modes are available, and the listed standby current is 1 µA with typical operating supply current of 18 mA. The monolithic architecture reduces the number of external RF components to a minimum of two according to the manufacturer data. This integration is valuable in wireless transmitters and receivers because the synthesizer supplies coherent, programmable frequencies while avoiding a large collection of discrete VCO, divider, detector, and filter components. Its low phase noise is another principal benefit for communications equipment. Typical uses include dual-band wireless communications, RF transceivers, IF generation, cellular equipment, and other RF systems requiring multiple locally generated frequencies. The part operates from a 2.7 V to 3.6 V supply and is offered in a compact 24-pin TSSOP package measuring approximately 0.173 inch by 4.40 mm. Designers should preserve adequate loop-filter bandwidth for the intended channel plan and verify that the selected reference frequency supports the required division ratios. PCB layout must keep reference and RF connections short, provide solid ground return paths, and decouple the supply close to the device. The SI4113-D-ZT1 is marked not recommended for new designs, so new equipment should evaluate the manufacturer-recommended SI4113-D-GM replacement. This page combines verified distributor lifecycle information, manufacturer-derived operating ranges, package information, and same-footprint replacement guidance. It also provides application-focused design notes and a structured comparison to help engineers identify the correct migration path without changing the 24-pin TSSOP board footprint.

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SI4114G-B-GM

SI4114G-B-GM - 1.99 GHz RF Synthesizer | Silicon Labs

The Silicon Labs SI4114G-B-GM is a single-circuit frequency synthesizer with a PLL, clock input, clock output, and a maximum frequency of 1.99 GHz, supplied in a 28-pin QFN package. Designed for RF synthesizer applications associated with direct-conversion GSM and GPRS wireless communications, it combines an integrated VCO and phase-locked-loop architecture in one device. Its identified supply-voltage range is 2.7 V to 2.9 V. A frequency synthesizer is a clock-and-timing device that generates, multiplies, divides, or locks a reference-derived output frequency to a stable phase relationship. A PLL, or phase-locked loop, compares a divided feedback signal with an input reference and adjusts a controlled oscillator until the loop reaches lock. In the wireless RF signal chain, a frequency synthesizer provides the local oscillator used by mixers to translate information between the carrier frequency and baseband. The SI4114G-B-GM belongs to the broader clock-generation and timing-control hierarchy that includes PLL synthesizers, RF synthesizers, and integrated VCO devices. Key verified features include one synthesizer circuit, PLL operation, a clock input, a clock output, and a maximum supported frequency of 1.99 GHz. The 2.7 V to 2.9 V operating supply range places the device in a low-voltage RF integration environment. The part is associated with a 28-pin QFN package and is offered in a GM-related ordering configuration. Additional operating details, including exact output-frequency limits, tuning range, reference-input conditions, lock time, phase-noise values, temperature limits, and package dimensions, were not included in the supplied verified records. Technically, the SI4114G-B-GM integrates the VCO with PLL synthesis functions intended for direct-conversion RF receivers. This integration can reduce the number of separate frequency-generation blocks required around a mixer, although the final receiver design must still satisfy required tuning range, reference frequency, phase-noise, spur, and temperature requirements. Because a PLL synthesizer depends on both its reference source and loop-filter implementation, good reference routing, controlled supply impedance, and deliberate ground-plane design remain essential. Typical uses include GSM and GPRS direct-conversion receivers, RF transceiver intermediate-frequency sections, and other wireless communication systems requiring a local oscillator below the verified 1.99 GHz maximum frequency. The device may also be relevant to custom RF test equipment or legacy receiver platforms, provided the designer verifies every electrical and timing parameter against the manufacturer datasheet before committing the part to a new PCB. Designers should not treat the Mouser replacement note as proof that any Si41xx-D-GM product is a one-for-one drop-in replacement. The manufacturer guidance describes multiple Si41xx-D-GM devices, so board-level compatibility, pin assignment, control registers, reference frequency, tuning range, and RF performance must all be checked. The SI4114G-B-GM is also marked not recommended for new designs, making lifecycle risk a primary selection criterion. This page consolidates the verified distributor information, package and application context, lifecycle warning, source links, and engineering cautions for SI4114G-B-GM. It distinguishes confirmed specifications from unavailable datasheet details and avoids presenting generic cross-reference tools as verified, pin-compatible replacements.

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SI4114G-BM

SI4114G-BM RF Synthesizer | Silicon Labs

The Silicon Labs SI4114G-BM is an RF frequency synthesizer with integrated voltage-controlled oscillators for direct-conversion E-GSM 900, DCS 1800, PCS 1900, and GPRS wireless systems. The verified source identifies a 28-QFN package, while operating frequency, phase-noise, tuning-range, supply-voltage, and electrical-limit details remain unavailable in the supplied records. The part is positioned as a legacy RF synthesizer rather than a current general-purpose clock generator. An RF frequency synthesizer generates a controllable, stable carrier or local-oscillator signal for wireless transmitters and receivers. In a direct-conversion receiver, synthesizer output can be mixed directly with the received RF signal, while in a transmitter it establishes the carrier frequency. Integrating the VCO with the synthesizer reduces the number of separate RF signal-path components and supports compact multiband radio designs. The SI4114G family was developed for multiband GSM and GPRS equipment. Silicon Labs states that it performs multiband RF synthesis for E-GSM 900, DCS 1800, and PCS 1900 applications. Its cited fast transient response makes it particularly relevant to GPRS multislot systems, where channel switching and settling performance influence receiver or transmitter readiness. The SI4114G-BM is identified as an RF synthesizer in a 28-QFN package. The supplied distributor results do not expose a complete current price table, operating-temperature range, pin map, output-power specification, tuning range, or phase-noise data. Those values must be taken from the manufacturer datasheet and verified against the exact ordering code before layout or production use. Typical legacy uses include GSM handset receivers and transmitters, multislot GPRS terminals, direct-conversion radios, and RF test equipment. The exact RF band, channel spacing, reference frequency, loop bandwidth, and board environment must be checked against the manufacturer document before selecting the device. For a new design, evaluate the modern Si41xx-D-GM family named by Mouser as the recommended replacement family rather than assuming that every Si41xx device is pin-compatible. Migration should be treated as a redesign unless the replacement's package, pinout, RF band plan, control interface, and timing behavior have all been verified. This page consolidates the supplied manufacturer-related PDF record, distributor lifecycle guidance, and cross-reference findings. It separates verified facts from missing electrical data rather than estimating unstated synthesizer parameters or presenting a non-pin-compatible modern family as a drop-in replacement.

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SI4115G-BM

SI4115G-BM PLL Clock Synthesizer | Silicon Labs

The Silicon Labs SI4115G-BM is a frequency synthesizer and phase-locked-loop clock integrated circuit associated with GSM/GPRS and external-synthesis applications. The verified product data confirms its clock-generator and frequency-synthesizer classification, but it does not provide a verified frequency range, supply voltage, output configuration, pin count, or package dimensions. Accordingly, those technical values remain data-needed rather than being inferred. The component is associated with the MLP-28 package in the available cross-reference data. A phase-locked loop, or PLL, is a frequency-control circuit in which an internal oscillator is phase and frequency aligned to a reference input. In clock-generator and frequency-synthesizer ICs, this architecture supports clock distribution, frequency multiplication or division, and generation of timing signals required by communications and digital systems. The SI4115G-BM belongs to the broader Clock & Timing > Clock Generators, PLL, and Frequency Synthesizers category. The verified distributor and manufacturer listings identify SI4115G-BM as a clock and timing IC associated with frequency synthesis and legacy wireless applications. The listing snippets specifically reference GSM/GPRS synthesis and external synthesis, providing application context without supplying enough verified electrical data to specify operating conditions. Users should obtain the original manufacturer datasheet before making a board-level substitution or timing-design decision. Typical design uses for this product family include RF and baseband clock generation, wireless transceiver timing, communications infrastructure, and embedded systems requiring a stable synthesized clock. However, exact suitability depends on required reference frequency, output frequency, channel spacing, loop bandwidth, supply voltage, jitter, and package-level pin compatibility. Those values must be confirmed from the manufacturer documentation. A legacy replacement should not be treated as drop-in solely because another PLL has a similar function. The verified search results mention Si4126-F-GM as a recommended replacement, but they do not establish that it shares the MLP-28 footprint, pinout, frequency range, or electrical parameters with SI4115G-BM. PCB migration therefore requires formal comparison of package drawings, pin names, supply rails, and timing specifications. This page combines the available verified distributor listings, package information, lifecycle concerns, and replacement guidance with explicit uncertainty markers. It is intended to support component identification and sourcing research rather than substitute for the original manufacturer datasheet or a complete engineering cross-reference.

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SI4122-BT

SI4122-BT - 1.5 GHz Dual-Band RF Synthesizer | Silicon Labs

The Silicon Labs SI4122-BT is a 1.5 GHz dual-band RF frequency-synthesizer IC with integrated VCOs, loop filters, varactors, and resonators, supplied in a 24-pin TSSOP package. It operates from a 2.7 V to 3.6 V supply, features programmable power-down modes, and requires only two external components according to the available manufacturer-related data. A frequency synthesizer is a clock-and-timing IC that generates a stable output frequency from a reference signal. This synthesizer supports wireless-communication RF signal chains, where programmable frequency generation is used for local oscillators, transceivers, and related RF functions. Its 1.5 GHz headline specification identifies the supported synthesis range in the distributor data, while the dual-band architecture supports wireless RF signal-generation requirements. The SI4122-BT is identified as a frequency-synthesizer IC with a 1:2 input-to-output ratio in the available distributor records. The available data also reports 18 mA typical supply current, 1 µA standby current, 3.6 V operation, and integrated VCO, loop-filter, varactor, and resonator functions. These features are useful where designers want to minimize external RF support components and simplify the synthesizer implementation. The 24-TSSOP package has a 0.173 inch, or 4.40 mm, width according to the DigiKey result. It is a surface-mount package, and the available distributor data identifies a 24-pin TSSOP with SMD/SMT mounting. Exact pin names, operating-temperature limits, phase-noise figures, frequency ranges by band, and full electrical limits were not supplied in the verified data and are therefore not inferred here. Typical applications include wireless-communication transmitters and receivers, RF transceiver local-oscillator paths, dual-band RF signal generation, and embedded RF systems requiring a programmable synthesizer. Designers should confirm the complete pinout, reference requirements, loop-filter configuration, and band-specific operating limits against the manufacturer datasheet before layout or firmware release. For implementation, preserve the supplied 24-pin TSSOP footprint and validate the reference and RF routing according to the manufacturer’s layout guidance. The integrated resonator and VCO functions can reduce external component count, but RF layout, grounding, decoupling, and keep-out requirements remain critical. This page consolidates verified distributor specifications, sourcing links, packaging information, and design considerations while clearly identifying parameters that still require datasheet confirmation.

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SI4122-D-GM

SI4122-D-GM - 1.5 GHz Dual-Band RF Synthesizer | Skyworks

Skyworks Solutions Inc. SI4122-D-GM is a 1.5 GHz dual-band RF frequency synthesizer IC with RF2 and IF outputs, housed in a 28-pin VQFN surface-mount package with an exposed pad. Its stated operating frequency ranges are 900 MHz to 1800 MHz and 750 MHz to 1500 MHz, while output power spans -14 dBm to 1 dBm. The device operates from a 2.7 V to 3.6 V supply and consumes 18 mA to 27 mA. An RF frequency synthesizer is a phase-locked-loop device that generates or translates a stable high-frequency carrier from a reference clock. Within the broader semiconductor hierarchy, the SI4122-D-GM is a PLL-based clock and timing IC, an RF synthesizer, and ultimately an integrated circuit used for wireless frequency generation. Its integrated VCOs reduce the need for external VCO components and varactor diodes, supporting compact and power-efficient wireless transmitter or receiver designs. Key features include support for IF and dual-band RF synthesis, integrated VCOs, RF2 and IF outputs, and a usable upper frequency of 1.5 GHz. According to the available manufacturer information, the device is designed to reduce external passive-component count and eliminate external VCOs and varactor diodes. Those characteristics make it suitable for price-sensitive, low-power personal wireless communications equipment where integration and board area are important. Technically, the device combines a phase-locked loop, integrated voltage-controlled oscillators, reference and RF synthesis functions, and an IF output path. The available product data specifies a supply-voltage range of 2.7 V to 3.6 V and current consumption of 18 mA to 27 mA. Exact phase noise, tuning-step, reference-input, temperature-coefficient, lock-time, and output-impedance details were not included in the supplied source data and therefore require confirmation from the manufacturer datasheet before final design release. Typical applications include cellular and personal wireless communication equipment, dual-band RF front ends, wireless handsets, RF modems, and other systems requiring local RF carrier generation. The integrated VCO arrangement is particularly relevant to compact designs that cannot accommodate separate discrete VCO and varactor networks. The 2.7 V to 3.6 V operating range also allows use with low-voltage RF system rails. Designers should preserve the exposed-pad thermal and electrical requirements of the 28-pin VQFN package and follow the manufacturer layout guidance for high-frequency RF routing. Reference, feedback, supply, and output paths should be kept short and appropriately decoupled. Since detailed loop-filter, reference-sensitivity, and decoupling values were not supplied in the verified excerpts, they must be taken directly from the official datasheet rather than inferred. This product page consolidates verified distributor pricing, package and operating information, available same-family alternatives, and application-specific engineering guidance into one engineering reference. It also clearly separates confirmed parameters from data that still requires datasheet confirmation, helping designers avoid unsupported assumptions during schematic and PCB-layout reviews.

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SI4122-D-GMR

SI4122-D-GMR - 1.5GHz RF Synthesizer | Silicon Labs

The Silicon Labs SI4122-D-GMR is a dual-band RF frequency synthesizer IC with integrated VCOs, a maximum RF output frequency of 1.5 GHz, and operation from a 2.7 V to 3.6 V supply in a 28-pin QFN exposed-pad package. The device accepts a reference or crystal-related input described in distributor data as 2 MHz to 26 MHz and generates RF and IF outputs, making it suitable for wireless communications and other frequency-generation systems. An RF frequency synthesizer is a clock-and-timing semiconductor that combines a phase-locked loop, frequency dividers, and voltage-controlled oscillators to produce stable, programmable output frequencies. The broader hierarchy is frequency synthesizer > PLL-based clock generator > clock and timing IC > semiconductor. The SI4122-D-GMR belongs to the Silicon Labs Si41xx family of integrated RF synthesizers, designed to reduce the number of discrete RF components required in a receiver or transmitter signal chain. Verified product information identifies the SI4122-D-GMR as a single PLL-based frequency synthesizer with divider and multiplier functions. Its supply range is 2.7 V to 3.6 V, its operating-temperature range is -40 °C to +85 °C, and its RF output extends to approximately 1.5 GHz. One distributor listing describes a 1,720 MHz output configuration, while another characterizes the device generically as a 1.5 GHz maximum-frequency synthesizer; engineers should consult the manufacturer datasheet for the exact configuration encoded by the full ordering code. The dual-band architecture is significant in wireless receiver and transmitter designs because separate synthesis paths can support RF and IF outputs without requiring unrelated external oscillator arrangements. The integrated VCOs also reduce board area compared with a discrete approach, although loop-filter selection, reference routing, output matching, supply filtering, and control-software sequencing remain essential design tasks. Exact phase-noise, tuning-range, divider-ratio, current-consumption, and lock-time figures were not present in the supplied verified data and therefore are not asserted here. Typical uses include wireless communications equipment, RF and IF signal-chain generation, test and measurement systems, and industrial RF modules. In a receiver, the synthesizer can establish the local oscillator needed by a mixer or downstream conversion stage. In a transmitter, it can provide a programmable carrier while a separate loop filter and reference system establish frequency accuracy and stability. Designers should preserve the exposed-pad thermal and electrical requirements of the 28-QFN package, place supply bypass capacitors close to the device, and follow the manufacturer layout and component-selection guidance for the VCO loop filter. Because the provided snippets conflict on whether the highlighted 1,720 MHz figure is a fixed maximum or configuration-specific output, verify the relevant register settings and frequency plan against the official datasheet before releasing a PCB. This product synthesis consolidates verified distributor specifications, package information, lifecycle indicators, related-family options, and practical engineering guidance. It also identifies where pin-level, phase-noise, and configuration-specific information remains necessary so procurement and design decisions are based on traceable evidence rather than inferred specifications.

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SI4122-D-GT

SI4122-D-GT - Dual-Band RF Synthesizer | Silicon Labs

The Silicon Labs SI4122-D-GT is a dual-band RF synthesizer with integrated voltage-controlled oscillators for wireless communications, covering 750 to 1500 MHz and 900 to 1800 MHz in a 24-pin TSSOP surface-mount package. It accepts a 2 MHz to 26 MHz reference input, operates from a 2.7 V to 3.6 V supply, and provides an RF2/IF synthesizer output. An RF synthesizer is a frequency-generation IC that combines a phase-locked loop, frequency dividers, and one or more VCOs to produce coherent high-frequency signals. In the broader electronics hierarchy, it belongs to clock and timing ICs, frequency synthesizers, and phase-locked-loop devices. Its integrated VCOs reduce the need for external oscillators, varactor diodes, and associated passive networks in cost-sensitive wireless transmitters and receivers. Key operating characteristics include an output-power range of -14 dBm to 1 dBm, harmonic content from -26 dBc to -20 dBc, and supply-current consumption between 18 mA and 27 mA. The 1.5 GHz device designation and dual-band coverage support RF communication architectures operating near the upper GSM, DCS1800, and PCS1900 frequency regions. The 24-pin TSSOP body is approximately 4.40 mm wide according to the distributor data. The SI4122-D-GT uses phase-locked-loop signal generation to establish the required output frequency and phase relationship. Its RF2/IF output arrangement is intended for wireless communication systems requiring a local oscillator or intermediate-frequency signal. Exact phase-noise, reference-input sensitivity, tuning-step, lock-time, and temperature-coefficient values are not present in the supplied verified results and must be checked against the manufacturer datasheet before final design release. Typical applications include GSM and DCS-style cellular equipment, dual-band wireless transceivers, RF up-converter and down-converter local-oscillator paths, intermediate-frequency generation, and cost-sensitive industrial RF modules. The integrated-VCO architecture can shorten RF design cycles while reducing external component count and improving integration against environmental interference. When laying out a replacement board, preserve the 24-pin TSSOP footprint, verify every exposed and supply connection against the original pinout, and place support components according to the manufacturer reference circuit. The 2.7 V to 3.6 V operating range leaves little margin for supply excursions, so regulation, bypass placement, grounding, and VCO loop stability require careful review. This product record consolidates verified distributor availability, frequency-band data, package information, and same-package cross-reference candidates with practical selection guidance. It highlights verified differences among related Silicon Labs parts so engineers can distinguish true footprint matches from devices that merely share the same package family.

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الفئات الفرعية

المنتجات (38,000+)

SI3225-BQ Dual-Channel SLIC/CODEC | Silicon Laboratories

SI3225-FQ Dual-Channel SLIC/Codec IC | Silicon Labs

SI3225-KQ - Dual-Channel SLIC/Codec TQFP-64 | Silicon Laboratories

SI3230-KT - Programmable CMOS SLIC with Ringing | Skyworks

SI3232-BQ - Dual-Channel Programmable CMOS SLIC | Skyworks

SI3232-FQ - Dual-Channel 3.3V ISDN SLIC | Silicon Labs

SI3232-KQ - Dual-Channel Programmable SLIC | Silicon Labs

SI4112-BM - 1 GHz IF Synthesizer | Silicon Labs

SI4112-BT - 1 GHz Dual-Band RF Synthesizer | Silicon Labs

SI4112-D-GT - 1 GHz Dual-Band RF Synthesizer | Skyworks

SI4112-D-GTR - 1 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

SI4113-BT - 1.8 GHz Dual-Band RF Synthesizer | Silicon Labs

SI4113-D-GM - 1.8 GHz Dual-Band RF Synthesizer | Skyworks

SI4113-D-GMR - 1.8 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

SI4113-D-GT - 1.8 GHz Dual-Band RF Synthesizer | Skyworks

SI4113-D-GTR - 1.8 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)

SI4113-D-ZT1 - Dual-Band 1.8GHz RF Synthesizer | Skyworks

SI4114G-B-GM - 1.99 GHz RF Synthesizer | Silicon Labs

SI4114G-BM RF Synthesizer | Silicon Labs

SI4115G-BM PLL Clock Synthesizer | Silicon Labs

SI4122-BT - 1.5 GHz Dual-Band RF Synthesizer | Silicon Labs

SI4122-D-GM - 1.5 GHz Dual-Band RF Synthesizer | Skyworks

SI4122-D-GMR - 1.5GHz RF Synthesizer | Silicon Labs

SI4122-D-GT - Dual-Band RF Synthesizer | Silicon Labs