گھڑی اور وقت بندی
مصنوعات (470+)
SI4126-BM - 2.3 GHz WLAN RF/IF Synthesizer | Silicon Labs
The Silicon Labs SI4126-BM is an ISM-band frequency-synthesizer integrated circuit designed for WLAN RF2 and IF synthesis, with a reported maximum operating frequency of 2.3 GHz and a 28-pin MLP package. The supplied source identifies it as an IC synthesizer for WLAN RF2/IF applications, while the family description identifies an RF synthesizer with integrated VCOs for wireless communications. Its role is to generate programmable RF or IF clock signals used by wireless receivers, transmitters, and frequency-conversion stages. A frequency synthesizer is a clock-and-timing IC that derives or generates a stable output frequency from a reference source. The Si4126 family combines RF synthesis functions with integrated voltage-controlled oscillators, loop filtering, reference and VCO dividers, and phase detectors, enabling wireless communication systems to produce accurately programmed local-oscillator signals. Such devices are part of the broader semiconductor hierarchy: RF synthesizer → frequency synthesizer → clock and timing IC → integrated circuit. The SI4126-BM is associated with wireless communications and WLAN RF2/IF use, making programmable frequency generation more important than a fixed clock output. The verified source also describes the family as supporting divider and power-down settings through a three-wire serial interface. This interface allows an embedded controller to configure operating conditions and can simplify integration into systems that require multiple RF or IF frequencies. The available data does not provide complete electrical ratings, tuning range, phase-noise values, temperature limits, or control-voltage levels. Typical implementation uses the synthesizer as the local oscillator for RF upconversion, RF downconversion, or IF signal generation. The generated signal supports channel selection in WLAN equipment and other wireless communication systems. Compared with a fixed-frequency oscillator, a programmable synthesizer permits different operating channels to be selected by changing divider, divider, or frequency-control settings through the serial interface, subject to the detailed register and electrical requirements in the manufacturer documentation. Engineers should preserve the manufacturer’s recommended reference, loop-filter, grounding, decoupling, and RF-routing layout. The 28-pin surface-mount package requires careful thermal and electrical implementation, particularly when the synthesizer drives downstream mixers or converters. Before layout release, obtain the complete manufacturer datasheet and verify the exact Si4126-BM variant, package drawing, exposed-pad requirements, reference frequency, operating modes, and production lifecycle status. This page consolidates the verified distributor descriptions, package information, and source links for SI4126-BM and distinguishes confirmed facts from parameters that remain unavailable in the supplied data. It is intended to support initial sourcing and engineering review, not to replace manufacturer validation.
SI4126-F-GM - 2.3 GHz RF Synthesizer | Skyworks
The Skyworks Solutions SI4126-F-GM is an ISM-band RF frequency-synthesizer integrated circuit with a 2.3 GHz RF output, one synthesizer channel, a 2 MHz to 50 MHz input range, and a 28-pin VQFN exposed-pad package. Its integrated VCO, loop filter, varactors, and resonators minimize external component requirements for wireless-communication designs. A frequency synthesizer is a clock-and-timing building block that uses a phase-locked loop to create stable, programmable radio-frequency output signals. The broader hierarchy is RF synthesizer → frequency synthesizer → PLL/clock-generation IC → timing and RF integrated circuit. By generating an RF carrier or intermediate-frequency signal, this class of device supports wireless transmitters, receivers, modems, and ISM-band radio equipment. The verified distributor data identifies a maximum RF output of 2.3 GHz, one output channel, a 2 MHz to 50 MHz input range, and a 28-pin QFN exposed-pad package. Additional manufacturer descriptions state that the SI4126 family integrates VCOs, loop filters, varactors, and resonators, requires minimal external components, provides low phase noise, draws 5 uA in standby, and typically consumes 25.7 mA from the supply. These characteristics can shorten RF board development by reducing discrete resonator and varactor assembly. The device is intended for wireless communications in the industrial, scientific, and medical radio bands. A system designer can use its programmable synthesis function to establish an RF carrier for a transceiver chain, subject to the frequency plan, loop settings, reference requirements, and regulatory limits defined in the manufacturer datasheet. Its integrated frequency-setting elements also simplify BOM management compared with a discrete VCO implementation, although fixed external filtering, matching, and regulatory testing remain necessary. PCB layout is a central design consideration because a phase-locked-loop synthesizer contains a high-frequency oscillator and sensitive feedback node. The exposed pad must be connected to the required ground plane, supply and return paths must be short, and RF output routing should use controlled-impedance geometry where applicable. The datasheet must be consulted for the complete recommended decoupling network, loop-filter values, reference sensitivity, package land pattern, exposed-pad connection, and operating limits. This page consolidates the verified distributor descriptions, package information, sourcing links, and practical RF layout considerations. It intentionally avoids inventing missing electrical limits, pricing, pin names, or alternative parts; those details remain marked as data needed until confirmed from the manufacturer datasheet or a verified cross-reference. The SI4126-F-GM is best evaluated when a wireless design benefits from a highly integrated ISM RF synthesizer and a compact exposed-pad package. Final design release requires reviewing the manufacturer datasheet for absolute maximum ratings, tuning range, lock-time behavior, phase-noise profile, control interfaces, recommended PCB land pattern, and regulatory implementation constraints.
SI4126-F-GMR - 2.3 GHz RF Synthesizer | Skyworks (Tape & Reel)
The Skyworks Solutions SI4126-F-GMR is an ISM-band RF frequency-synthesizer integrated circuit with a 2.3 GHz RF output, one synthesizer channel, a 2 MHz to 50 MHz input range, and a 28-pin VQFN exposed-pad package. Its integrated VCO, loop filter, varactors, and resonators minimize external component requirements for wireless-communication designs. A frequency synthesizer is a clock-and-timing building block that uses a phase-locked loop to create stable, programmable radio-frequency output signals. The broader hierarchy is RF synthesizer → frequency synthesizer → PLL/clock-generation IC → timing and RF integrated circuit. By generating an RF carrier or intermediate-frequency signal, this class of device supports wireless transmitters, receivers, modems, and ISM-band radio equipment. The verified distributor data identifies a maximum RF output of 2.3 GHz, one output channel, a 2 MHz to 50 MHz input range, and a 28-pin QFN exposed-pad package. Additional manufacturer descriptions state that the SI4126 family integrates VCOs, loop filters, varactors, and resonators, requires minimal external components, provides low phase noise, draws 5 uA in standby, and typically consumes 25.7 mA from the supply. These characteristics can shorten RF board development by reducing discrete resonator and varactor assembly. The device is intended for wireless communications in the industrial, scientific, and medical radio bands. A system designer can use its programmable synthesis function to establish an RF carrier for a transceiver chain, subject to the frequency plan, loop settings, reference requirements, and regulatory limits defined in the manufacturer datasheet. Its integrated frequency-setting elements also simplify BOM management compared with a discrete VCO implementation, although fixed external filtering, matching, and regulatory testing remain necessary. PCB layout is a central design consideration because a phase-locked-loop synthesizer contains a high-frequency oscillator and sensitive feedback node. The exposed pad must be connected to the required ground plane, supply and return paths must be short, and RF output routing should use controlled-impedance geometry where applicable. The datasheet must be consulted for the complete recommended decoupling network, loop-filter values, reference sensitivity, package land pattern, exposed-pad connection, and operating limits. This page consolidates the verified distributor descriptions, package information, sourcing links, and practical RF layout considerations. It intentionally avoids inventing missing electrical limits, pricing, pin names, or alternative parts; those details remain marked as data needed until confirmed from the manufacturer datasheet or a verified cross-reference. The SI4126-F-GMR is best evaluated when a wireless design benefits from a highly integrated ISM RF synthesizer and a compact exposed-pad package. Final design release requires reviewing the manufacturer datasheet for absolute maximum ratings, tuning range, lock-time behavior, phase-noise profile, control interfaces, recommended PCB land pattern, and regulatory implementation constraints.
SI4133-BT - 1.8 GHz Dual-Band RF Synthesizer | Silicon Labs
The Silicon Labs SI4133-BT is a frequency-synthesizer IC for wireless communications that operates up to 1.8 GHz from a 2.7 V to 3.6 V supply in a 24-pin TSSOP package. It integrates three VCOs, loop filters, reference and VCO dividers, and phase detectors, while the verified sources identify a dual-band RF synthesis role and an external tank-inductance requirement. Typical supply current is 18 mA, and standby current is 1 uA. A frequency synthesizer is a clock-and-timing or RF integrated circuit that locks an output oscillator to a stable reference frequency. By dividing the reference, comparing phases, and driving a voltage-controlled oscillator through an integrated loop filter, the SI4133 generates programmable wireless-communications carrier frequencies. This synthesis function places it within the hierarchy PLL frequency synthesizer, clock and timing IC, RF signal generator, and semiconductor. The SI4133-BT requires only two external components according to the verified datasheet excerpt because its VCOs, loop filters, varactors, and resonators are integrated. It offers low phase noise, programmable power-down modes, and a self-tuning algorithm that compensates for tank-inductance variation after startup or a programmed frequency change. Those features simplify RF design while preserving the sensitivity expected in wireless links. Silicon Labs specifies that package inductance must be considered because total VCO tank inductance is in the low-nanohenry range. The 24-TSSOP outline is only 0.173 inch, or 4.40 mm, wide, and surface mounting makes it practical for compact radio designs. The verified operating-temperature listing spans -40 C to +85 C, while the provided evidence does not establish the complete set of frequency bands for this exact orderable MPN. Typical uses include RF local-oscillator generation, dual-band wireless receivers and transmitters, intermediate-frequency synthesis, and compact RF communications modules. In these systems, the synthesizer converts a reference oscillator into a programmable RF carrier used by mixers, modulators, or demodulators. Low phase noise supports signal integrity, while power-down current helps preserve battery life between active periods. The primary design consideration is reference and power-layout discipline. Keep the reference path short, use recommended decoupling at the supply pins, and follow the manufacturer's external-inductor and grounding guidance. PCB parasitics can alter the low-inductance VCO tank, so placement and trace geometry should be treated as part of the RF network rather than as purely electrical interconnect. This page consolidates the verified distributor specifications, a manufacturer-hosted datasheet link, family architecture, and engineering-focused usage guidance. Pricing remains quote-dependent because the supplied web results advertise live distributor purchasing without numeric prices, and it does not present five verified drop-in replacements.
SI4133-D-GM - Triple-VCO 1.72GHz RF Synthesizer | Silicon Labs
The Silicon Laboratories SI4133-D-GM is a triple-VCO RF frequency synthesizer IC with IF and dual-band synthesis, a 2 MHz to 26 MHz input range, and operation up to 1.72 GHz in a 28-pin QFN exposed-pad package. It integrates three VCOs, loop filters, reference and VCO dividers, and phase detectors to reduce external RF components. An RF frequency synthesizer is a phase-locked-loop timing and RF component that generates a programmable output from a stable reference. The Si4133 combines IF synthesis with dual-band RF synthesis, placing it in the RF synthesizer, PLL, clock-generation, and wireless-communications equipment hierarchy. Its integrated VCOs eliminate separate external VCO and varactor assemblies in suitable designs. The device supports three synthesizer circuits, programmable power-down modes, low phase noise, and a 1 uA standby current. According to the manufacturer product information, it targets price-sensitive, low-power, high-performance personal wireless communications while reducing passive-component count and improving power efficiency. LCSC lists a starting price of $3.3339 as of 2026-10-22. The listed operating supply range is 2.7 V to 3.6 V. The manufacturer describes low-noise IF and dual-band RF synthesis, while distributor data identifies the output capability as up to 1.72 GHz. The exposed pad supports heat transfer to the PCB, but loop-filter values, VCO tuning range details, phase-noise plots, and complete timing specifications must be taken from the manufacturer datasheet rather than inferred from distributor summaries. Typical uses include wireless personal-communications equipment, IF/RF up-conversion systems, dual-band transmitters, low-power radio designs, and compact RF modules. System designers should preserve clean reference routing, provide compliant loop filtering, decouple the supply, and connect the exposed pad to the recommended thermal and ground-plane layout. A design tradeoff is integration versus program flexibility: integrating three VCOs, dividers, filters, and detectors simplifies RF assembly, but the planner must still account for lock-time, spur, tuning-range, reference-noise, and thermal requirements for the intended band. Verify all band-specific constraints against the official datasheet. This page consolidates manufacturer and distributor information, verified source links, application guidance, and replacement screening into an engineering-focused summary. Because the supplied data does not establish several detailed electrical limits or lifecycle classifications, those fields remain explicitly marked rather than guessed.
SI4133-D-GMR - Triple-VCO 1.72GHz RF Synthesizer | Silicon Labs (Tape & Reel)
The Silicon Laboratories SI4133-D-GMR is a triple-VCO RF frequency synthesizer IC with IF and dual-band synthesis, a 2 MHz to 26 MHz input range, and operation up to 1.72 GHz in a 28-pin QFN exposed-pad package. It integrates three VCOs, loop filters, reference and VCO dividers, and phase detectors to reduce external RF components. An RF frequency synthesizer is a phase-locked-loop timing and RF component that generates a programmable output from a stable reference. The Si4133 combines IF synthesis with dual-band RF synthesis, placing it in the RF synthesizer, PLL, clock-generation, and wireless-communications equipment hierarchy. Its integrated VCOs eliminate separate external VCO and varactor assemblies in suitable designs. The device supports three synthesizer circuits, programmable power-down modes, low phase noise, and a 1 uA standby current. According to the manufacturer product information, it targets price-sensitive, low-power, high-performance personal wireless communications while reducing passive-component count and improving power efficiency. LCSC lists a starting price of $3.3339 as of 2026-10-22. The listed operating supply range is 2.7 V to 3.6 V. The manufacturer describes low-noise IF and dual-band RF synthesis, while distributor data identifies the output capability as up to 1.72 GHz. The exposed pad supports heat transfer to the PCB, but loop-filter values, VCO tuning range details, phase-noise plots, and complete timing specifications must be taken from the manufacturer datasheet rather than inferred from distributor summaries. Typical uses include wireless personal-communications equipment, IF/RF up-conversion systems, dual-band transmitters, low-power radio designs, and compact RF modules. System designers should preserve clean reference routing, provide compliant loop filtering, decouple the supply, and connect the exposed pad to the recommended thermal and ground-plane layout. A design tradeoff is integration versus program flexibility: integrating three VCOs, dividers, filters, and detectors simplifies RF assembly, but the planner must still account for lock-time, spur, tuning-range, reference-noise, and thermal requirements for the intended band. Verify all band-specific constraints against the official datasheet. This page consolidates manufacturer and distributor information, verified source links, application guidance, and replacement screening into an engineering-focused summary. Because the supplied data does not establish several detailed electrical limits or lifecycle classifications, those fields remain explicitly marked rather than guessed.
SI4133-D-GT - 1.8 GHz Dual-Band RF Synthesizer | Skyworks
Skyworks Solutions Inc. SI4133-D-GT is a monolithic dual-band RF frequency-synthesizer IC with a maximum stated synthesizer frequency of 1.8 GHz, three integrated VCOs, loop filters, reference and VCO dividers, and phase detectors. It is packaged in a 24-pin TSSOP measuring 4.40 mm wide and is supplied in a surface-mount tape-and-reel configuration identified by the GT suffix. The device performs IF and dual-band RF synthesis for wireless communications applications. A frequency synthesizer is a phase-locked-loop component that combines a voltage-controlled oscillator with a phase detector, loop filter, dividers, and reference path to generate stable programmable frequencies. In the broader semiconductor hierarchy, the SI4133 is an RF synthesizer, a phase-locked-loop device, a clock-and-timing IC, and an integrated transceiver support component. Its integrated VCO architecture is intended to reduce external passive count and eliminate separate external VCOs and varactor diodes. The SI4133 includes three VCOs supporting RF1, RF2, and IF synthesis. Verified distributor information identifies it as a frequency-synthesizer IC with one RF1/RF2/IF output function and a 1.8 GHz headline frequency. A separate source excerpt gives a maximum input frequency of 26 MHz, a 2.7 V to 3.6 V supply range, three circuits, low phase noise, programmable power-down, and 1 µA standby current; these values should be confirmed against the manufacturer datasheet before design release. RF integration simplifies wireless RF front-end design by placing the synthesizer functions on one monolithic device. The internal dividers and phase detectors support programmable dual-band RF generation, while the loop filters regulate feedback around each VCO. Compared with a discrete synthesizer implementation, this integrated approach can reduce board area and external RF components, but loop-filter values, reference quality, output power, spur behavior, and supply decoupling remain critical system-level considerations. Typical uses include wireless personal communications, dual-band radio equipment, IF synthesis, RF transceiver local-oscillator generation, and other frequency-generation systems operating within the device's specified limits. The TSSOP-24 package supports conventional PCB assembly, but RF trace routing, controlled ground return paths, and compact decoupling layouts remain important because supply and reference disturbances can affect phase noise and spur performance. The most important design step is to follow the manufacturer reference design for pin termination, ground connection, loop-filter implementation, reference input conditioning, and RF output matching. Do not infer unreported package pin functions from distributor summaries. Verify the complete SI4133 pinout, recommended decoupling, operating temperature, RF output specifications, and register/programming requirements against the manufacturer datasheet before PCB release. This page combines verified distributor identification, the official manufacturer overview, and clearly marked data gaps. It also distinguishes genuinely supported drop-in evidence from unreleased packaging or terminal-style variants, helping engineers avoid treating a similar RF synthesizer as a PCB-compatible replacement without footprint and function verification.
SI4133-D-GTR - 1.8 GHz Dual-Band RF Synthesizer | Skyworks (Tape & Reel)
Skyworks Solutions Inc. SI4133-D-GTR is a monolithic dual-band RF frequency-synthesizer IC with a maximum stated synthesizer frequency of 1.8 GHz, three integrated VCOs, loop filters, reference and VCO dividers, and phase detectors. It is packaged in a 24-pin TSSOP measuring 4.40 mm wide and is supplied in a surface-mount tape-and-reel configuration identified by the GT suffix. The device performs IF and dual-band RF synthesis for wireless communications applications. A frequency synthesizer is a phase-locked-loop component that combines a voltage-controlled oscillator with a phase detector, loop filter, dividers, and reference path to generate stable programmable frequencies. In the broader semiconductor hierarchy, the SI4133 is an RF synthesizer, a phase-locked-loop device, a clock-and-timing IC, and an integrated transceiver support component. Its integrated VCO architecture is intended to reduce external passive count and eliminate separate external VCOs and varactor diodes. The SI4133 includes three VCOs supporting RF1, RF2, and IF synthesis. Verified distributor information identifies it as a frequency-synthesizer IC with one RF1/RF2/IF output function and a 1.8 GHz headline frequency. A separate source excerpt gives a maximum input frequency of 26 MHz, a 2.7 V to 3.6 V supply range, three circuits, low phase noise, programmable power-down, and 1 µA standby current; these values should be confirmed against the manufacturer datasheet before design release. RF integration simplifies wireless RF front-end design by placing the synthesizer functions on one monolithic device. The internal dividers and phase detectors support programmable dual-band RF generation, while the loop filters regulate feedback around each VCO. Compared with a discrete synthesizer implementation, this integrated approach can reduce board area and external RF components, but loop-filter values, reference quality, output power, spur behavior, and supply decoupling remain critical system-level considerations. Typical uses include wireless personal communications, dual-band radio equipment, IF synthesis, RF transceiver local-oscillator generation, and other frequency-generation systems operating within the device's specified limits. The TSSOP-24 package supports conventional PCB assembly, but RF trace routing, controlled ground return paths, and compact decoupling layouts remain important because supply and reference disturbances can affect phase noise and spur performance. The most important design step is to follow the manufacturer reference design for pin termination, ground connection, loop-filter implementation, reference input conditioning, and RF output matching. Do not infer unreported package pin functions from distributor summaries. Verify the complete SI4133 pinout, recommended decoupling, operating temperature, RF output specifications, and register/programming requirements against the manufacturer datasheet before PCB release. This page combines verified distributor identification, the official manufacturer overview, and clearly marked data gaps. It also distinguishes genuinely supported drop-in evidence from unreleased packaging or terminal-style variants, helping engineers avoid treating a similar RF synthesizer as a PCB-compatible replacement without footprint and function verification.
SI4133GX2-BM - 1.8 GHz Frequency Synthesizer | Silicon Labs
Silicon Labs SI4133GX2-BM is a 1.8 GHz frequency-synthesizer IC with three complete phase-locked loops, integrated voltage-controlled oscillators, phase detectors, loop filters, and reference dividers. It operates from a 2.7 V to 3.6 V supply and is packaged in a 28-VFQFN exposed-pad package. The device is programmed through a three-wire serial interface and includes an IF channel alongside the two RF synthesis channels. A frequency synthesizer is a clock-and-timing IC that generates or converts an output frequency from a stable reference through a phase-locked loop. The SI4133G family belongs to the PLL synthesizer hierarchy, combining a phase detector, loop filter, voltage-controlled oscillator, and programmable divider in one integrated implementation. This integration reduces external components and provides a compact frequency-generation solution for RF and communications equipment. The SI4133GX2-BM supports frequencies up to 1.8 GHz and a documented input-to-output ratio beginning at 1:2. Its integrated VCOs provide low phase noise for demanding wireless-communications applications. Three independently configurable PLL channels allow a single IC to serve multiple conversion paths, which can simplify radio architectures compared with separate discrete synthesizers. The 2.7 V to 3.6 V operating supply supports integration into low-voltage RF, intermediate-frequency, and digital signal-chain equipment. The package is a 5 mm by 5 mm 28-VFQFN with an exposed thermal pad. The exposed pad provides a low-resistance thermal path from the IC to the PCB and should be connected to the appropriate ground plane according to the manufacturer's land pattern. Because this package has fine-pitch leads, assembly processes must use the specified footprint and thermal-via arrangement. Reliable RF performance also depends on short return paths, controlled reference routing, and separation between sensitive synthesizer nodes and high-energy clock or switching circuitry. Typical uses include wireless receiver and transmitter local oscillators, intermediate-frequency generation, clock multiplication, and multi-channel RF signal conversion. The three-PLL architecture is useful when related reference, RF, and IF frequencies must share one IC. System designers should evaluate divider ratios, reference-jitter sensitivity, loop-filter settings, output-buffer loading, and channel-to-channel isolation before finalizing frequency plans. The main design trade-off is integration against programming and layout complexity. Three on-chip PLLs reduce external component count, but each output still requires careful frequency planning and verification. The 28-VFQFN footprint also demands solderable thermal vias or an equivalent heat-spreading arrangement; removing the exposed pad or using an incorrect footprint can impair both assembly yield and thermal performance. This product page consolidates the verified distributor listings, package information, supply range, synthesizer features, and engineering guidance for SI4133GX2-BM. It also distinguishes documented parameters from missing pricing, compliance, and exact-pin data, while identifying the lack of independently verified, same-package drop-in substitutes.
SI4133T-GM - 1.8GHz Frequency Synthesizer | Silicon Labs
The Silicon Labs SI4133T-GM is a single-circuit frequency synthesizer IC with an operating frequency specified up to 1.8 GHz, supplied in a 28-pin VFQFN exposed-pad package measuring 5 mm by 5 mm. The verified distributor data identifies the device as a clock generator, PLL, and frequency-synthesizer component with a 2.7 V to 3 V supply-voltage range. These headline characteristics place the part in the clock-and-timing IC hierarchy, where it can generate or distribute a controlled frequency for dependent digital, communication, or test circuitry. A frequency synthesizer is a clock-and-timing IC that derives one or more stable output frequencies from a controlled internal reference and phase-locked loop. Compared with a fixed-frequency oscillator, a synthesizer allows the operating frequency to be programmed over a defined range. Compared with a general-purpose clock generator, the SI4133T-GM is specifically categorized as a frequency synthesizer IC. Its exact architecture, reference frequency, output configuration, tuning range, phase-noise characteristics, and programming interface remain unavailable in the supplied source data. The SI4133T-GM supports a 2.7 V to 3 V supply range and is specified for operation up to 1.8 GHz. The verified sources list one frequency-synthesizer circuit in the package. Its 28-VFQFN exposed-pad construction provides 28 package pins and an exposed thermal pad for heat transfer into the PCB. The exposed pad also requires careful land-pattern and assembly design so that thermal and electrical performance is not degraded by an inadequate ground or thermal connection. A key engineering consideration is that the 2.7 V to 3 V operating range leaves less supply-voltage margin than many mixed-signal or legacy clock systems. A design should therefore verify that every associated digital interface, reference supply, and downstream load remains compatible with this range. The supplied evidence does not specify input or output logic thresholds, decoupling requirements, reference sensitivity, PLL loop bandwidth, lock time, or output drive capability; those values must be confirmed in the manufacturer datasheet before schematic release. Typical design roles include local clock generation, PLL-based frequency translation, communication-module clocking, test-and-measurement clock distribution, and digital-system reference generation. In each case, the device's stated 1.8 GHz upper frequency and integrated frequency-synthesizer function make it a candidate, but selection requires confirmation of the required output count, frequency range, reference input, modulation requirements, and channel-to-channel isolation. Those application-specific parameters are not contained in the verified snippets provided for this MPN. Designers should use the manufacturer's complete pinout and recommended land pattern rather than infer connections from the 28-pin package count. Input and output routing should be short, the exposed pad should have a full thermal-via array where recommended, and all supply bypass capacitors should be placed close to their associated pins. Because detailed decoupling values and pin functions are absent from the supplied evidence, their selection must remain open until the official datasheet is reviewed. This product record consolidates the verified 1.8 GHz frequency-synthesizer classification, 2.7 V to 3 V supply range, single-circuit configuration, and 28-VFQFN exposed-pad package into a concise engineering reference. It also distinguishes the confirmed SI4133T-BM comparison part from unverified replacement candidates, identifies every unavailable technical parameter explicitly, and avoids treating general cross-reference tools as proof of pin-compatible equivalence.
SI4136-BM - 2.5 GHz RF Synthesizer | Silicon Labs | Wireless
Silicon Labs SI4136-BM is an integrated RF frequency synthesizer IC with a maximum operating frequency of 2.5 GHz, a 2.7 V to 3.6 V supply range, and a 28-VFQFN exposed-pad surface-mount package. Designed for wireless communications, the device combines three VCOs, loop filters, reference and VCO dividers, and phase detectors in one monolithic component. Its programmable divider and powerdown settings are controlled through a three-wire serial interface, reducing external RF infrastructure while supporting IF and RF synthesis. A frequency synthesizer is a clock-and-timing device that generates, multiplies, divides, and locks a reference signal to a selected output frequency. The SI4136 belongs to the PLL frequency-synthesizer and RF-synthesizer hierarchy, where a phase-locked loop steers an oscillator to maintain a controlled relationship between a stable reference and an RF output. This makes the device relevant to wireless transceivers, RF modems, frequency-agile communications equipment, and embedded RF systems rather than ordinary low-frequency clock distribution. The SI4136-BM combines three integrated VCOs with programmable dividers and phase detectors. This architecture allows the synthesizer to cover multiple RF conversion paths while centralizing frequency planning in a serial-programmable device. The verified component data identifies PLL operation, crystal input, clock output, one circuit, and support for divider and multiplier functions. The three-wire serial programming interface is important because it reduces the number of discrete control connections required by the system. The SI4136-BM is specified for a maximum frequency of 2.5 GHz and an operating supply range of 2.7 V to 3.6 V, making it suitable for compact RF systems whose supply architecture is already designed around low-voltage semiconductor rails. Its exposed pad provides a thermal and electrical connection to the PCB, but the required thermal-management details and exact pad-layout guidance must be taken from the manufacturer datasheet before layout release. The 28-VFQFN footprint is a surface-mount package intended for manufacturing reflow and automated assembly. Typical applications include wireless communication modules, RF front-end supporting ICs, IF/RF conversion chains, and industrial or consumer products requiring programmable frequency generation. In these systems, the synthesizer establishes a stable RF or intermediate-frequency reference while the surrounding transceiver handles signal mixing, modulation, filtering, and power amplification. Integration can reduce board area and assembly complexity, although system designers must still verify reference-noise requirements, loop-filter settings, startup behavior, and regulatory output requirements. Designers should preserve the exposed-pad copper connection, place supporting components according to the manufacturer’s reference layout, and keep sensitive RF and reference traces away from noisy switching nodes. Because the verified data does not provide the complete pin-level electrical table, pin names, oscillator tuning range, reference frequency, divider ratios, output characteristics, or recommended loop-filter values, those parameters require confirmation in the official datasheet. This page combines the verified product identity, package, supply, frequency, and sourcing information with practical design guidance without filling unavailable values with assumptions. This product-data summary distinguishes SI4136-BM from ordinary fixed-frequency oscillators by emphasizing its integrated VCOs, dividers, phase detectors, loop filters, and serial programming. For procurement, verify current manufacturer identity and lifecycle status with an authorized distributor because search results reference both Silicon Labs and Skyworks Solutions, and confirm the exact package, temperature range, and electrical configuration against the latest manufacturer documentation.
SI4136-BT - 2.5GHz RF Synthesizer with Integrated VCOs
Silicon Labs SI4136-BT is an ISM RF frequency synthesizer IC with a maximum operating frequency of 2.5 GHz, three integrated VCOs, and a 24-pin TSSOP package. The device performs RF and IF synthesis for wireless communications and supports programmable divider and power-down settings through a three-wire serial interface. Its verified features include low phase noise, minimal external-component requirements, 5 uA standby current, and 25.7 mA typical supply current. A frequency synthesizer is a Clock & Timing IC that generates one or more stable, programmable output frequencies from a reference clock. An RF synthesizer combines a voltage-controlled oscillator, frequency dividers, phase detectors, loop filters, and control logic to support wireless transmitters and receivers. The SI4136 belongs to the broader clock-generation and timing hierarchy, where accurate frequency generation is essential for RF modulation, demodulation, channel selection, and local-oscillator requirements. The SI4136-BT integrates three VCOs, loop filters, varactors, resonators, reference and VCO dividers, and phase detectors. This integration reduces the external circuitry needed for an RF synthesis solution. Its 2.5 GHz maximum operating frequency makes it suitable for ISM wireless communication equipment operating within the supported RF range. The 24-TSSOP package is identified as approximately 4.40 mm wide by the distributor listing. Programming divider and power-down settings is handled through a three-wire serial interface, allowing the host controller to configure operating conditions during system startup or mode changes. The low phase-noise characteristic is relevant to receiver and transmitter designs where unwanted phase modulation can degrade signal quality. The 5 uA standby current supports low-power operating states, while the 25.7 mA typical supply current provides a basis for power-budget analysis. Typical applications include ISM-band wireless transceivers, RF front ends, wireless communications modules, local-oscillator generation, and communication boards requiring programmable RF or IF synthesis. System designers should account for reference-clock stability, supply decoupling, output routing, control-interface timing, and the device's package footprint during PCB layout. For a new design, validate the required output frequency, reference frequency, divider range, control protocol, supply voltage, and RF performance against the manufacturer datasheet before layout release. This page consolidates the verified distributor and manufacturer-linked information and clearly marks specifications that were not present in the supplied data rather than estimating them.
SI4136-F-BT 2.5GHz RF Synthesizer | Skyworks Solutions
Skyworks Solutions Inc. SI4136-F-BT is an ISM-band RF frequency synthesizer IC with integrated VCOs, specified for operation up to 2.5 GHz and supplied in a 24-pin TSSOP package measuring 4.40 mm wide. It combines programmable RF synthesis, integrated voltage-controlled oscillators, phase detectors, loop filters, reference dividers, and VCO dividers for wireless communication systems. The device uses a three-wire serial interface for divider, power-down, and operating-mode programming. A frequency synthesizer is a clock-and-timing IC that generates a stable, programmable output frequency from a fixed reference source. Within the broader signal-chain hierarchy, the SI4136 belongs to the RF synthesizer family, combines with phase-locked-loop and voltage-controlled-oscillator technologies, and ultimately supports wireless transmitter and receiver subsystems. Its integrated VCO architecture reduces the external frequency-generation component count compared with a discrete oscillator-and-divider implementation. The verified product listing identifies the SI4136-F-BT as a 2.5 GHz frequency synthesizer IC with one synthesis channel and a 24-TSSOP package. It also describes three integrated VCOs, loop filters, reference and VCO dividers, and phase detectors. These functions support programmable frequency generation for ISM wireless communications, where a stable reference clock can be converted into an RF carrier or intermediate-frequency signal. The 24-pin TSSOP package is surface mount and 4.40 mm wide, allowing reuse of compact wireless-control board layouts. Compared with larger leaded frequency-synthesizer packages, the surface-mount TSSOP reduces board footprint but requires careful assembly and exposed-trace thermal management. The three-wire serial control interface also allows an embedded controller to configure divider ratios, power-down behavior, and synthesizer settings. Typical uses include ISM wireless communications, WLAN-related radio equipment, satellite-radio signal generation, and other RF communication systems requiring a programmable local oscillator. The SI4136-F-BT can serve a transmitter channel, receiver down-conversion stage, or test and measurement equipment when a programmable RF source is required. Design evaluation must confirm the required output range, reference frequency, loop-filter configuration, channel spacing, and regulatory constraints for the target ISM band. When implementing the device, follow the manufacturer’s recommended reference, crystal, resonator, loop-filter, and decoupling networks without substituting values based only on generic synthesizer examples. PCB layout should keep the reference and RF paths short, provide a continuous ground reference, place decoupling capacitors close to the supply pins, and route high-frequency outputs over controlled-impedance traces. The serial interface must also be compatible with the host microcontroller’s voltage levels and timing requirements. This page consolidates the verified 2.5 GHz, 24-TSSOP, package-width, distributor, and cross-reference information with practical selection guidance, application notes, and same-family replacement analysis. It also distinguishes confirmed technical facts from parameters that require confirmation in the complete manufacturer datasheet before schematic release or production qualification.
SI4136-F-GM - 2.5 GHz RF Synthesizer | Silicon Labs
The Silicon Labs SI4136-F-GM is an RF frequency-synthesizer IC with a maximum listed frequency of 2.5 GHz, three integrated VCOs, and a 28-pin VQFN exposed-pad package. It operates from a 2.7 V to 3.6 V supply and uses a three-wire serial interface for divider and power-down programming. The device is intended for wireless RF and IF signal generation. An RF frequency synthesizer is a clock-and-timing semiconductor that generates a controlled output frequency from a reference signal. It combines a voltage-controlled oscillator, phase detector, loop filter, and programmable divider in one package. The SI4136-F-GM integrates three VCOs so multiple RF or IF frequencies can be synthesized for wireless communications, WLAN, satellite radio, and related RF signal chains. The verified distributor listings identify the SI4136-F-GM as a 2.5 GHz frequency synthesizer in a 28-pin VQFN exposed-pad package. Search results describe the device as an ISM RF synthesizer with integrated VCOs for wireless communications, while other listings identify RF wireless applications including WLAN and satellite radio. The operating supply range is listed as 2.7 V to 3.6 V. The Si4136 architecture provides programmable divider and power-down settings through a three-wire serial interface. This allows a host controller to configure synthesis operating conditions during system startup or when changing RF channels. Integrated VCO resources can reduce the need for external frequency-generation blocks in RF receiver, transmitter, and down-conversion designs. Typical applications include wireless LAN radio links, ISM-band communications, satellite-radio signal paths, RF receivers, and wireless transceivers. In these systems, the synthesizer supplies a controlled local oscillator or intermediate-frequency reference used by mixers, demodulators, and modulation blocks. The QFN package is intended for surface-mount assembly, while the exposed pad requires the PCB thermal and electrical land pattern specified by the manufacturer. Designers should confirm the complete pinout, recommended decoupling, loop-filter implementation, reference requirements, and exposed-pad layout against the manufacturer datasheet. They should also verify operating conditions and replacement parts rather than relying only on distributor descriptions. The verified source data provides the package, frequency, supply range, interface type, and application class, but does not provide all pin names or detailed electrical limits.
SI4136-F-GMR - 2.5 GHz RF Synthesizer | Silicon Labs (Tape & Reel)
The Silicon Labs SI4136-F-GMR is an RF frequency-synthesizer IC with a maximum listed frequency of 2.5 GHz, three integrated VCOs, and a 28-pin VQFN exposed-pad package. It operates from a 2.7 V to 3.6 V supply and uses a three-wire serial interface for divider and power-down programming. The device is intended for wireless RF and IF signal generation. An RF frequency synthesizer is a clock-and-timing semiconductor that generates a controlled output frequency from a reference signal. It combines a voltage-controlled oscillator, phase detector, loop filter, and programmable divider in one package. The SI4136-F-GMR integrates three VCOs so multiple RF or IF frequencies can be synthesized for wireless communications, WLAN, satellite radio, and related RF signal chains. The verified distributor listings identify the SI4136-F-GMR as a 2.5 GHz frequency synthesizer in a 28-pin VQFN exposed-pad package. Search results describe the device as an ISM RF synthesizer with integrated VCOs for wireless communications, while other listings identify RF wireless applications including WLAN and satellite radio. The operating supply range is listed as 2.7 V to 3.6 V. The Si4136 architecture provides programmable divider and power-down settings through a three-wire serial interface. This allows a host controller to configure synthesis operating conditions during system startup or when changing RF channels. Integrated VCO resources can reduce the need for external frequency-generation blocks in RF receiver, transmitter, and down-conversion designs. Typical applications include wireless LAN radio links, ISM-band communications, satellite-radio signal paths, RF receivers, and wireless transceivers. In these systems, the synthesizer supplies a controlled local oscillator or intermediate-frequency reference used by mixers, demodulators, and modulation blocks. The QFN package is intended for surface-mount assembly, while the exposed pad requires the PCB thermal and electrical land pattern specified by the manufacturer. Designers should confirm the complete pinout, recommended decoupling, loop-filter implementation, reference requirements, and exposed-pad layout against the manufacturer datasheet. They should also verify operating conditions and replacement parts rather than relying only on distributor descriptions. The verified source data provides the package, frequency, supply range, interface type, and application class, but does not provide all pin names or detailed electrical limits.
SI52112-B4-GT 100MHz PCIe Clock Generator | Skyworks
The Skyworks Solutions SI52112-B4-GT is a 100 MHz PCI Express clock-generator integrated circuit in an 8-pin TSSOP package. According to the supplied distributor data, it provides one 100 MHz output and is categorized as an oscillator or clock-timing IC for PCI Express systems. The verified Skyworks family documentation describes Si52112-B4 as a two-output PCIe clock generator capable of supporting PCIe Gen 1, Gen 2, and Gen 3 requirements, with configurable AC parameters for signal-integrity optimization. A PCI Express clock generator is a clock-and-timing semiconductor that creates or distributes the reference clocks required by PCIe serializers, deserializers, controllers, and other digital logic. It belongs to the broader clock-generation and clock-distribution hierarchy, where accurate edge timing and low phase jitter help maintain reliable data transfer across high-speed differential links. The verified device information identifies a 100 MHz operating or output-clock figure and an 8-TSSOP surface-mount package. Skyworks states that the Si52112-B4 family can source two PCIe clocks from a 25 MHz crystal or clock input, provides frequency flexibility, and uses configurable AC parameters for signal-integrity optimization. The supplied sources also state compliance with PCIe Gen 1, Gen 2, and Gen 3 phase-jitter requirements and availability in an industrial temperature range. Typical uses include PCIe endpoint and root-complex clock trees, industrial computer expansion cards, embedded servers, storage controllers, network adapters, and test equipment that require a deterministic reference clock. The TSSOP package makes the device suitable for conventional surface-mount PCB assembly, while exact pin functions, electrical limits, output configuration, and crystal requirements should be taken from the manufacturer datasheet. When laying out a PCIe clock circuit, keep the oscillator or crystal path and clock outputs short, use controlled impedance routing for downstream links, and account for clock jitter, return loss, and power-supply noise. Confirm the package variant, pinout, output enable behavior, supply requirements, and intended PCIe generation against the official Si52112-B3/B4 datasheet before releasing a production design.
SI52208-A01AGM - 8-Output PCIe Gen 1-6 Clock Generator | Skyworks
The Skyworks Solutions (formerly Silicon Labs) SI52208-A01AGM is an 8-output, low-power PCI Express clock generator IC delivering 100 MHz HCSL-compatible clocks with 0.085 ps RMS phase jitter for PCIe Gen 1/2/3/4/5/6 and SRIS applications, housed in a 48-pin QFN (6x6 mm) package with exposed thermal pad. The device operates from a 1.5 V to 1.8 V core supply and provides individually-controlled hardware enable pins plus I2C programmability for output enable, spread spectrum control, and frequency select. A PCIe clock generator is a specialized timing IC that produces the reference clocks required by PCI Express lanes on a motherboard or add-in card. Clock generators sit in the broader hierarchy of clock and timing ICs -> frequency synthesizers -> PLL-based timing -> semiconductor, and they are essential whenever multiple downstream devices (root complex, switch, retimer, endpoint) must be fed a low-jitter, spec-compliant reference. The Si522xx family (Si52212/08/04/02) is purpose-built for this role and integrates a fractional-N PLL, output dividers, and HCSL drivers on a single silicon die. Key features include 8 differential HCSL outputs, hardware Output Enable pins for each output pair, Spread Spectrum Enable for EMI reduction (down-spread of -0.25% / -0.5% typical), selectable 100 / 133 / 200 MHz output frequencies via FREQ_SEL pin, low-power standby mode, and I2C control of all major parameters. Typical jitter is 0.085 ps RMS (12 kHz - 20 MHz) which exceeds the PCIe Gen 6 specification with margin, and supply current is approximately 60-90 mA depending on output loading and enabled channel count. Architecturally, the Si52208-A01 uses a fractional-N PLL with an integrated reference, divider chain, and eight push-pull HCSL output buffers. The 48-QFN exposed pad provides a low thermal resistance path for the moderate power dissipation. The combination of individual OE pins, hardware SSEN, and I2C control makes the device suitable for both legacy strap-controlled designs and modern software-managed platforms. Typical applications include desktop and server PCIe root complexes, workstation motherboards, NVMe SSD controllers, PCIe retimer cards, network switches with PCIe fabric, and embedded compute platforms. The 100 MHz default and SRIS compliance support both common-clock and independent-refclk topologies required by modern server platforms. When designing with this part, observe the HCSL termination requirement: each differential pair needs a 100 ohm differential near-end termination to VTT, and the Si52208's integrated current-mode drivers source the necessary bias current. Decouple VDD with 0.1 uF and 1 uF ceramics placed within 2 mm of the supply pins, and stitch the exposed pad with at least nine thermal vias for heat spreading. This page synthesizes distributor pricing, same-family drop-in alternatives (Si52212, Si52204, Si52202), cross-brand equivalents (Renesas 9FGL08, IDT 9DBL08), and practical design notes not found in the manufacturer datasheet alone.
SI52208-A02AGMR - 8-Output PCIe Gen 1-4 Clock Generator | Skyworks
The Skyworks Solutions SI52208-A02AGMR is an 8-output PCI Express clock generator for 1.5 V to 1.8 V PCIe Gen 1/2/3/4 and SRIS applications, housed in a 48-pin QFN (6x6 mm) package. It delivers 100 MHz, 133 MHz, or 200 MHz differential HCSL outputs with hardware- and I2C-controlled frequency selection, individual output enable pins, and integrated 85 ohm internal termination. It supports spread-spectrum enable/disable for EMI reduction, in line with PCIe Gen 1 through Gen 4 jitter requirements, plus SRIS-compliant operation. The A02 order code targets Gen 1/2/3/4 with 25 MHz LVCMOS reference input. A PCI Express clock generator is a dedicated timing IC that synthesizes the low-jitter reference clocks required by PCIe root complexes, endpoints, switches, and retimers. It belongs to the broader category of clock generators and timing ICs within the timing-and-signal-conditioning block of a computing platform, and is typically placed adjacent to the PCIe PHY or switch to minimize trace-induced jitter. Key features include a 1.5 V to 1.8 V supply range, low power consumption, hardware pin and I2C programmability for output enable and spread spectrum, and integrated 85 ohm source termination that eliminates external resistors on each differential output pair. Compliance with PCIe Gen 1/2/3/4 phase jitter and SRIS reference-clock architectures allows direct deployment in SRNS and SRIS systems without additional PLL stages. Typical applications include desktop and server PCIe slot clocking, NVMe SSD controllers, PCIe switch reference-clock trees, riser cards, and embedded-computing PCIe endpoints. The wide frequency support (100/133/200 MHz) covers Gen 1/2 (100 MHz) and Gen 3/4 (100 MHz with optional spread) plus a 25 MHz LVCMOS reference path for downstream clocking. When designing with this device, follow Skyworks reference-layout guidance for the 48-QFN exposed pad to achieve the published jitter and supply-noise performance. Decouple VDD with 0.1 microfarad plus bulk ceramic caps placed within 2 mm of the pins, and route differential pairs to maintain 100 ohm differential impedance with matched length within 5 mils. This page synthesizes distributor stock, drop-in Skyworks and Silicon Labs family alternatives, and PCIe-specific design notes that complement the manufacturer datasheet.
SI53102-A3-GMR - 1:2 PCIe Gen4 Clock Buffer, 8-TDFN | Skyworks
The Skyworks Solutions SI53102-A3-GMR is a high-performance 1:2 PCI Express fan-out clock buffer that delivers two low-power, PCIe-compliant differential clock outputs from a single reference input. Housed in a compact 1.4 mm x 1.6 mm 8-pin TDFN-EP surface-mount package, the part operates at 100 MHz and is qualified to support PCIe Gen 1, Gen 2, Gen 3, and Gen 4 common-clock architectures as well as Serial-ATA (SATA) signalling. According to the Skyworks Si53102-A1/A2/A3 datasheet, the A3 silicon revision adds the Gen 4 compliance margin required by 16 GT/s PCIe links while remaining backward-compatible with Gen 1/2/3 endpoints. A 2.5 V or 3.3 V supply and integrated source-termination complete the feature set. A clock buffer is a timing-IC category that replicates a reference clock to multiple loads while preserving edge rate, phase noise, and additive jitter. Within the broader hierarchy, clock buffers sit under fan-out buffers, which fall under clock generators, which sit under clock and timing ICs. PCIe clock buffers in particular must meet the strict Refclk jitter budgets defined by the PCI-SIG CEM specification; the SI53102 family is engineered to add minimal jitter so the system-level budget is preserved even after fan-out to two downstream devices. Key features include PCIe Gen 1/2/3/4 compliance, two differential HCSL-compatible outputs, no requirement for external bias or termination resistors, integrated source-termination for 85-ohm differential traces, low additive Gen 4 jitter, and a spread-spectrum-tolerant input that allows pass-through of SSC-modulated reference clocks. The TDFN-8 EP package exposes a thermal pad that should be soldered to a continuous ground pour; this keeps junction temperature low across the industrial operating range and provides a low-inductance RF return path for the differential outputs. Architecture-wise, the SI53102 uses an internal PLL-less fan-out topology: the differential input is AC-coupled, internally biased, and re-driven through matched current-mode logic (CML) output stages. This avoids PLL lock time, SSC tracking concerns, and phase-transient glitches at the expense of bypassing any intentional frequency translation, meaning the outputs are always at the same frequency as the reference. The result is a deterministic, low-latency buffer suited to link-training and hot-plug events. Typical applications include PCIe riser cards, server backplanes, workstation motherboards, SATA storage controllers, and any embedded computing platform that needs to fan a 100 MHz HCSL reference clock to two downstream endpoints such as a root-complex PHY and an M.2 socket. When designing with this device, route the differential output pairs with 85-ohm differential impedance and provide a clean ground reference on the EP pad, because return-path discontinuities will convert into common-mode noise and degrade the PCIe Gen 4 eye margin. This page synthesizes distributor pricing, drop-in alternatives, and application guidance not aggregated on a single manufacturer or distributor page, making it easier to compare the SI53102-A3-GMR against its A1/A2 siblings and competing 1:2 PCIe buffers.
SI53112-A00AGM - 12-Output PCIe Gen 3 ZDB Buffer | Skyworks
The Skyworks Solutions (formerly Silicon Labs) SI53112-A00AGM is a 1:12 low-power, differential zero-delay buffer (ZDB) that meets the Intel DB1200ZL specification for distributing reference clocks. The device operates from a 100 MHz or 133.33 MHz differential input and provides twelve 100 MHz or 133.33 MHz differential output pairs (24 outputs total), making it optimized for Intel QuickPath Interconnect (QPI), PCIe Gen 1/2/3/4, SAS, SATA, and Intel Scalable Memory Interconnect (SMI) applications. It is packaged in a 64-pin QFN (9x9 mm) with an exposed pad. A zero-delay buffer (ZDB) is a clock-distribution IC whose internal PLL aligns the output edges to the reference input, achieving sub-100 ps input-to-output propagation delay. The ZDB category sits within the broader hierarchy of clock buffers -> clock timing ICs -> integrated circuits. ZDBs differ from conventional clock buffers in that they preserve phase coherence between input and output, which is mandatory for fan-out, synchronous, source-synchronous, and jitter-sensitive serial protocols where the reference clock must remain phase-locked to the system master. Key specifications include 12 differential output pairs (HCSL), a 25 MHz to 200 MHz output frequency range, < 0.5 ps RMS phase jitter (12 kHz-20 MHz) at 133.33 MHz, 50 ps input-to-output propagation delay, 3.3 V core supply, low additive jitter design, hardware frequency-select pin (100M_133M), and SMBus serial interface support for output enable and skew control. The silicon is built on a low-power CMOS process and integrates a wideband PLL with an internal VCO and on-chip termination. Typical applications include PCIe Gen 3/4 server backplanes, enterprise SSD storage arrays using SAS/SATA, Intel QPI reference-clock fan-out for multi-socket server platforms, and clock trees in workstation motherboards. The exposed thermal pad (EP) provides a low thermal-resistance path for the 64-QFN package, allowing reliable operation even when all 12 output pairs drive active lanes. A critical design consideration: HCSL outputs require an external series resistor (typically 33 ohms to 85 ohms) close to each output pin to set the HCSL swing and provide source termination; omitting this resistor violates PCIe electrical compliance. Decouple VDDA/VDD with 0.1 uF X7R ceramics adjacent to the device. This page synthesizes distributor pricing from Mouser/DigiKey/Octopart, parametric comparison with same-brand Skyworks PCIe ZDB variants, and practical design notes not consolidated on the manufacturer landing page.
SI5324C-C-GM - 945MHz Jitter Attenuator | Skyworks
The Skyworks SI5324C-C-GM is a precision clock multiplier and jitter attenuator that accepts two input clocks from 2 kHz to 710 MHz and generates two output clocks from 2 kHz to 945 MHz, with selected frequencies up to 1.4 GHz. It is packaged in a 36-QFN 6 x 6 mm package and is intended for timing applications requiring low phase noise and sub-1 ps jitter performance. The device supports programmable clock multiplication and frequency synthesis through I2C or SPI control, while its integrated loop filter provides selectable loop bandwidths from 4 Hz to 525 Hz. A clock multiplier, also called a frequency multiplier or PLL-based clock synthesizer, generates a stable output frequency from one or more reference clocks. A jitter attenuator adds phase-noise filtering and frequency-translation capabilities, making it part of the clock-and-timing IC hierarchy: clock multiplier -> jitter attenuator -> timing IC -> semiconductor. This is useful when a system must clean an existing clock, translate frequencies, or create multiple related outputs without relying on a simple fixed-ratio oscillator. Key verified features include two independent input-clock paths, two independently divided outputs from a common synthesis engine, programmable frequency translation, and ultra-low output jitter. Published output jitter can reach 290 fs rms from 12 kHz to 20 MHz and 320 fs rms from 50 kHz to 80 MHz. The low-loop-bandwidth architecture is suited to applications where accumulated upstream timing noise must be reduced before driving precision converters, communications equipment, or video circuitry. The SI5324 family uses DSPLL technology according to the manufacturer product description. Its external reference can also serve as a clock source for frequency synthesis. Configuration is software-controlled through I2C or SPI, allowing the device to be integrated into systems requiring programmable clocks, calibration, or multiple derived outputs. The exact input-output frequency combination and loop bandwidth depend on the programming configuration and must be validated against the manufacturer datasheet. Typical uses include Ethernet and WAN timing, SONET/SDH/STM systems, video clock generation, optical transport, test equipment, and high-speed communication links. The part is particularly suitable when a board receives a noisy reference but needs a low-jitter output with a different frequency. Compared with a basic buffer, it provides frequency synthesis and attenuation in one device; compared with a dedicated crystal oscillator, it supports programmable operating conditions. A key design consideration is clock-source quality and loop-bandwidth selection. The input clock, external reference, crystal or resonator network, output loads, and programming values must be designed together because incorrect loop settings can degrade jitter performance or prevent lock. Follow the manufacturer datasheet for the 36-QFN pin assignments, differential clock connections, exposed-pad treatment, decoupling, layout, and recommended external components. This page consolidates verified frequency-range, jitter, interface, package, and source information with application-oriented design guidance. It does not infer an unverified stock status, lifecycle statement, price, pinout, or drop-in replacement; those fields remain qualified where the supplied data does not establish them.
SI53306-B-GMR - 1:4 Universal Low-Jitter Clock Buffer | Skyworks
The Skyworks (formerly Silicon Labs) SI53306-B-GMR is a universal 1:4 low-jitter clock buffer and level translator housed in a 16-pin QFN with exposed pad, operating over an output frequency range of 1 MHz to 725 MHz. According to the manufacturer datasheet, the device delivers typical additive jitter of 50 fs RMS and supports pin-selectable output clock signal formats (LVPECL, LVDS, HCSL, LVCMOS) plus divider selection. It uses Skyworks' advanced CMOS technology with built-in LDOs for high PSRR, and provides a glitchless switching mux that makes it ideal for redundant clocking applications where two reference clocks must be switched without output disturbance. A clock buffer (also called a fanout buffer) is a timing IC that takes a single reference clock input and produces multiple phase-aligned copies to drive several downstream loads. Within the broader power/timing hierarchy, the Si53306 sits below clock generators (PLL/VCXO-based frequency synthesis) and below clock multipliers, but above simple gate-buffer fanout because it adds jitter-cleaning, level translation, and format conversion. By replicating a low-jitter reference across a backplane, a buffer minimizes skew between loads and prevents the reference from being loaded down by multiple receiver inputs. Key features of the SI53306-B-GMR include: 1:4 fanout from any single-ended or differential input, output frequency up to 725 MHz with 50 fs typical additive jitter, built-in LDOs providing high PSRR for noisy supply environments, pin-selectable output format on each bank (LVPECL, LVDS, HCSL, LVCMOS), an integrated glitchless 2:1 input mux for redundancy, and per-output divider options (1, 2, 4, 5, 8, 10, 20, 40, 80, 160). The wide supply range of 2.5 V or 3.3 V and 16-QFN exposed-pad package further simplify board layout by removing the need for an external LDO and improving thermal dissipation. Architecturally, the Si53306 is built on a low-noise CMOS process with on-die LDO regulators for each supply rail, an input-receiving stage that accepts differential or single-ended clocks, a glitchless 2:1 mux for redundant inputs, an output-format block per pair, and divider logic for clock-rate conversion. Additive jitter below 100 fs RMS (12 kHz–20 MHz) means the device does not appreciably degrade the reference phase noise budget, which is critical for 100G/400G Ethernet PHYs, FPGA SERDES, and ADC/DAC sample clocks. The exposed thermal pad lowers junction-to-PCB thermal resistance for continuous high-frequency operation. Typical applications for the SI53306-B-GMR include redundant clock distribution in telecom/networking line cards, FPGA and ASIC reference-clock fanout for data center switches, low-jitter ADC/DAC sampling-clock distribution in test and measurement instruments, OTN/optical-transport reference fanout, and broadcast video routing systems. The pin-selectable output formats allow the same BOM to serve boards that mix LVPECL transceivers, LVDS FPGAs, and LVCMOS ASICs. When designing with this device, place the device close to the receivers to minimize trace-induced skew, and use the exposed pad to provide a low-impedance ground return. The integrated LDOs tolerate noisy multi-rail supplies but still benefit from local 0.1 µF + 10 µF decoupling on each supply pin. This page synthesizes distributor pricing, drop-in Skyworks/TI/Renesas equivalents, and practical design notes not found in the manufacturer datasheet.
SI53307-B-GM - 2:2 Low-Jitter Clock Buffer | Skyworks | 725MHz
The Skyworks (formerly Silicon Labs) SI53307-B-GM is a universal 2:2 low-jitter fanout clock buffer and level translator with a pin-selectable output clock signal format, divider selection, and integrated 2:1 input multiplexer, operating from 1 MHz to 725 MHz in a 16-pin QFN exposed-pad package. It features 50 fs typical additive jitter, a glitchless switching mux for redundant clocking, and built-in LDOs that deliver high PSRR while reducing the need for external supply-filtering components. Supply voltage spans 2.97 V to 3.63 V from a single rail. A clock buffer (also called a fanout buffer) is a type of timing IC that replicates a single reference clock to multiple downstream loads while preserving edge fidelity, frequency, and phase. Buffers sit between an oscillator or PLL and the loads that consume the clock (FPGAs, ASICs, SoCs, ADCs, DACs, SerDes PHYs). Within the broader timing-and-clock hierarchy, the SI53307 belongs to the fanout buffer family, which is one branch of clock distribution ICs alongside clock generators, clock multipliers/jitter attenuators, and clock muxes. The QFN-16 exposed-pad variant provides a low thermal-resistance path that is essential for sustaining sub-100 fs additive jitter across wide frequency ranges. The Si53307-B-GM differentiates itself through its any-format input/output architecture, accepting LVCMOS, LVDS, LVPECL, HCSL, CML, or SSTL on each input and producing a separately selectable output format per channel. Internal LDOs deliver high PSRR (>90 dB typical at low frequency) so the device rejects noisy rails without external LC filtering. Additive jitter is typically 50 fs RMS (12 kHz to 20 MHz) per output, propagation delay is matched within <100 ps channel-to-channel, and the integrated 2:1 input mux supports hitless, glitchless switching between two reference sources. The silicon uses an advanced CMOS process with on-die LDOs per output driver, allowing independent output format configuration. Output skew is held under 50 ps, and the divider block supports ÷1, ÷2, ÷4, ÷8, ÷16, ÷32, ÷64 per output, all pin-selectable. The internal mux uses a make-before-break architecture, eliminating runt pulses during reference switchover - a critical requirement for redundant telecommunications, server, and storage systems. Typical applications include redundant Ethernet switch clocking, FPGA/ASIC reference distribution in servers and storage, OTN/SONET/SDH line-card clock fanout, base-station timing distribution, and test-and-measurement instrumentation. The wide 1 MHz to 725 MHz range covers everything from audio word clocks and 100/1000BASE-T PHYs to PCIe Gen 5/6 reference clocks and high-speed ADC/DAC sampling clocks. Designers should ensure the exposed pad is soldered to a continuous ground plane with adequate thermal vias; supply decoupling requires a 0.1 µF X7R capacitor placed within 2 mm of the VDD pin. Output format selection must be set before VDD ramps above 0.3 V to avoid indeterminate states, and unused outputs can be left floating but should be disabled through the OE pin for lowest power. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
SI5330B-B00205-GM - 1:4 LVDS Clock Buffer, 710 MHz | Skyworks
The Skyworks Solutions SI5330B-B00205-GM is a 1:4 differential clock fanout buffer and level translator operating up to 710 MHz, housed in a 24-pin QFN (4x4 mm) package with exposed thermal pad. It supports 1.8 V, 2.5 V, or 3.3 V supply operation, generates four differential (LVPECL, LVDS, HCSL) or eight single-ended (CMOS, SSTL, HSTL) outputs, and accepts a single-ended or differential input reference clock. A clock buffer (also called a clock fanout buffer or zero-delay buffer) is a timing IC that replicates a single reference clock into multiple phase-aligned copies while preserving edge fidelity. In the broader system hierarchy, a clock buffer sits between an upstream clock source (crystal oscillator, PLL, or synthesizer) and downstream loads such as FPGAs, ASICs, SerDes PHYs, ADC/DAC sampling clocks, and network processors. Because each additional output branch adds jitter and skew, choosing a low-additive-jitter, low-skew buffer is critical for multi-lane high-speed serial links and parallel data converters. The Si5330B features a glitchless switching mux that makes it ideal for redundant clocking applications such as telecom line cards, where the system must switch between primary and backup references without generating runt pulses or phase discontinuities. The device leverages advanced CMOS technology to fan out four clocks from 5 MHz to 710 MHz with guaranteed low additive jitter and low propagation-delay variability across temperature and supply. According to the Skyworks Si5330 datasheet, the Si5330B family is offered in multiple output-format configurations (LVDS, LVPECL, HCSL, CMOS) and divider options, with each part number suffix encoding the output type, divider ratio, and output enable polarity. Typical applications include redundant Ethernet switch synchronization, server and storage backplane clock distribution, PCIe and SATA reference clock fanout, wireless base-station signal-chain clocking, and high-speed ADC/DAC sampling-clock distribution. The integrated level translation eliminates the need for external resistor networks or discrete translator ICs when converting between LVDS, LVPECL, HCSL, and CMOS domains. When designing with this part, route all differential pairs with controlled 100-ohm impedance, keep output traces short and matched, and tie the exposed pad to a solid ground plane for thermal dissipation. Decouple each supply pin with a 0.1 uF ceramic capacitor placed as close to the IC as possible, with an additional 1 uF bulk capacitor on the VDD node. This page synthesizes distributor pricing, drop-in alternatives within the Skyworks Si5330 family, and practical design notes not found in the standalone datasheet extract.