SI5345B-B-GM 350 MHz Clock Synthesizer | Skyworks Solutions
Référence : SI5345B-B-GM ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
SI5345B-B-GM Présentation
A clock synthesizer is a timing integrated circuit that derives one or more deterministic clock outputs from a reference or input oscillator. Clock synthesizers, phase-locked loops, and jitter attenuators belong to the clock-and-timing IC hierarchy used to synchronize processors, converters, serializers, and communications equipment. The SI5345B family combines clock generation and jitter attenuation in one configurable device.
Key verified features include ten outputs, a maximum output frequency of 350 MHz, digitally programmable jitter-attenuation bandwidth, and any-frequency operation. Configuration is handled with ClockBuilder Pro, allowing a board-specific clock tree to be prepared before deployment. Programmable non-volatile memory allows the device to restart with a known configuration, reducing reliance on an external controller after power-up.
The SI5345B architecture uses fourth-generation DSPLL and MultiSynth technologies identified in the manufacturer datasheet. These technologies support jitter attenuation and flexible frequency generation. The distinction between SI5345A, SI5345B, SI5345C, and SI5345D variants must be checked against the manufacturer configuration and ordering information before substitution because exact programming and feature compatibility are not established by the supplied search results.
Typical uses include high-speed communications, optical-networking equipment, servers, storage systems, test and measurement instruments, and FPGA or processor clock trees. In each case, low-jitter reference-derived outputs can reduce timing uncertainty, while ten outputs can consolidate multiple clock requirements into one timing device. Placement and power implementation remain important because the exposed pad must dissipate heat and all supply pins require appropriate decoupling.
Use the manufacturer ClockBuilder Pro configuration workflow and verify input, output, reference, pin, and NVM settings before release to production. Board design should reserve the exposed-pad land pattern, provide continuous low-impedance ground and supply connections, and avoid long uncontrolled clock traces. This page combines verified distributor availability, manufacturer family information, cross-reference findings, and design guidance while explicitly identifying parameters that require confirmation from the manufacturer datasheet.
Alternatives de remplacement direct pour SI5345B-B-GM — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SI5345B-B-GM (même facteur de forme et même empreinte) — différant par Number of Outputs, Package, Technology.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SI5345B-A-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI5345B-D-GM
✅ Remplacement direct✓ En stock
$8.55 / unité
Voir la fiche technique →SI5345B-C-GM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI5345B-B05221-GMR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI5345B-B03718-GMR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI5345B-B-GM Spécifications
| Product Type | Clock synthesizer / jitter cleaner |
| Maximum Output Frequency | 350 MHz |
| Minimum Input Frequency | 8 MHz |
| Maximum Input Frequency | 750 MHz |
| Nombre de sorties | 10 outputs |
| Frequency Synthesis | Any-frequency output |
| Jitter-Attenuation Bandwidth | Digitally programmable |
| Input Supply Voltage | 1.71 V to 3.47 V |
| Core Supply Voltage | 1.8 V |
| Technology | Fourth-generation DSPLL and MultiSynth |
| Configuration Interface | Serial interface |
| Programmable Memory | In-circuit programmable non-volatile memory |
| Configuration Software | ClockBuilder Pro |
| Boîtier | 64-pin VFQFN with exposed pad |
| Type de montage | Surface mount |
| Terminal Count | 64 terminals |
Guide de configuration des broches du SI5345B-B-GM 64-pin vfqfn with exposed pad
Configuration des broches du SI5345B-B-GM (boîtier 64-pin vfqfn with exposed pad). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SI5345B-B-GM.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SI5345B-B-GM convient pour 6 applications: Optical Networking Clock Systems, FPGA Processing Clocks, High-Speed Data Conversion, Server and Storage Timing, Test and Measurement Instrumentation, Industrial Control and Robotics.
Optical Networking Clock Systems
SI5345B-B-GM fits an optical-networking clock tree that needs several derived clocks from one timing reference. Its ten outputs and 350 MHz maximum output frequency provide capacity for serializer, transceiver, control, and status-clock domains, while programmable jitter attenuation helps isolate the system from reference phase noise. ClockBuilder Pro should define the standard-specific frequencies and I/O assignments. The design trade-off is that every output still requires board-level return-path and length management, and the final jitter budget must be validated with the complete transceiver and optical subsystem.
Recommandé
FPGA Processing Clocks
The SI5345B-B-GM can supply independent programmable clocks for FPGA fabric, transceivers, memory interfaces, and management logic in a high-speed processing platform. Consolidating up to ten outputs under one ClockBuilder configuration simplifies frequency planning and creates a reproducible timing-tree document. The 350 MHz ceiling covers many digital clock domains but does not imply adequate margin for every FPGA interface. Engineers must match voltage levels, drive strength, PLL input requirements, and max-frequency limits in the FPGA data sheet before assigning each output.
Recommandé
High-Speed Data Conversion
SI5345B-B-GM is suitable when an ADC or DAC front end requires several coherent sampling and modulation clocks with controlled phase noise. Deriving the clocks from one reference can reduce independent oscillator mismatch, and the programmable attenuation bandwidth lets engineers tune the loop to the converter architecture. The device is limited to 350 MHz output, so higher-rate converters may require frequency multiplication outside this part. Validate clock amplitude, jitter, input frequency range, and isolation or coupling against the converter's characterization data.
Recommandé
Server and Storage Timing
A server or storage controller can use SI5345B-B-GM to distribute low-jitter clocks to processors, interfaces, memory controllers, and monitoring circuitry. Ten outputs permit a centralized timing plan and repeatable non-volatile startup configuration. The trade-off is that clock partitioning, power sequencing, and isolation must be designed around the load and endpoint requirements; frequency availability alone is not sufficient. Measure edge quality at each endpoint because retimers, connectors, and power-supply impedance can add noise or skew not represented by the oscillator's nominal specification.
Recommandé
Test and Measurement Instrumentation
SI5345B-B-GM can generate coherent clocks for trigger, acquisition, modulation, and conversion stages in a laboratory instrument. Configurable output frequencies make it useful when one board must support multiple test modes, and programmable attenuation supports changing jitter-versus-tracking requirements. Its maximum verified output is 350 MHz, so very fast instruments may need an additional synthesis stage. Production documentation should preserve the ClockBuilder file, NVM image, reference specification, and end-point jitter measurements to ensure repeatability during calibration.
Recommandé
Industrial Control and Robotics
SI5345B-B-GM can organize controller, communications, sensor, and motion-control clocks in an industrial system that values deterministic startup. Storing the configuration in non-volatile memory allows the timing device to resume with a known clock plan after power cycling. Programmable jitter attenuation may help isolate sensitive endpoints from reference disturbances, but industrial qualification requirements are not supplied in the verified data. Engineers must confirm temperature limits, electromagnetic robustness, clock margins, and functional-safety needs separately for the complete system.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SI5345B-B-GM — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SI5345B-A-GM | SI5345B-D-GM | SI5345B-C-GM | SI5345B-B05221-GMR | SI5345B-B03718-GMR |
|---|---|---|---|---|---|---|
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
Principaux différenciateurs
- Low-jitter B-GM implementation (vs SI5345B-A-GM)
- Shared verified output ceiling (vs SI5345B-D-GM)
- Configuration-specific ordering options (vs SI5345B-B05221-GMR)
Notes de conception
Use the exact 64-pin VQFN land pattern and exposed-pad geometry from the manufacturer package drawing. Place clock inputs near their assigned pins, route clock outputs directly to their destinations, and keep the serial programming interface accessible without introducing long switching-clock crossings. Maintain a continuous ground reference under the package and connect the exposed thermal pad with multiple low-inductance vias where the package drawing permits.
Decouple each applicable supply rail directly at its package pins using the capacitor values and placement required by the manufacturer datasheet. Avoid sharing a narrow supply path between the clock core and noisy output drivers. Estimated: no power-loss calculation is presented because device current, voltage, and thermal-resistance data were not supplied. Validate sequencing, startup behavior, and supply ripple at the pins with the final ClockBuilder configuration.
Do not assume that parts sharing SI5345B family naming are automatically interchangeable. The A-GM is described as a base or blank prototyping device, while the B-GM is described as the low-jitter implementation; ordering suffixes can also encode a different frequency plan. Compare the exact output list, input type, I/O standard, NVM image, pin assignment, and ClockBuilder report before approving any alternative as a drop-in replacement.
Treat every clock as a controlled high-speed signal even when its frequency is modest. Match output-to-input topology, respect endpoint voltage thresholds, avoid stubs, and preserve return paths beneath clock traces. For edge-sensitive endpoints, measure rise time, fall time, jitter, and deterministic skew at the receiver; nominal frequency alone does not establish signal integrity. Keep the reference and configuration interface away from outputs where coupling could affect jitter measurements.
Informations de conformité
The verified search results do not provide conclusive compliance statements for the exact SI5345B-B-GM ordering code. A separate comparison snippet mentioning RoHS and REACH was not accepted as evidence for this part. Compliance documents and manufacturer declarations must be reviewed before environmental or automotive qualification.
