SI5345B-B-GM 350 MHz Clock Synthesizer | Skyworks Solutions
料号： SI5345B-B-GM ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI5345B-B-GM 概述
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.
直接替换替代料： SI5345B-B-GM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SI5345B-B-GM （相同外形与封装尺寸） ——差异在于 Number of Outputs, Package, Technology.
快速对比工具——选择替代料号进行并排对比：
SI5345B-A-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI5345B-D-GM
✅ 直接替换✓ 有现货
$8.55 / 个
查看数据手册 →SI5345B-C-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI5345B-B05221-GMR
✅ 直接替换📋 参考替代料（不在目录中）
SI5345B-B03718-GMR
✅ 直接替换📋 参考替代料（不在目录中）
SI5345B-B-GM 规格参数
| Product Type | Clock synthesizer / jitter cleaner |
| Maximum Output Frequency | 350 MHz |
| Minimum Input Frequency | 8 MHz |
| Maximum Input Frequency | 750 MHz |
| 输出数量 | 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 |
| 封装 | 64-pin VFQFN with exposed pad |
| 安装类型 | Surface mount |
| Terminal Count | 64 terminals |
SI5345B-B-GM 64-pin vfqfn with exposed pad 引脚配置指南
SI5345B-B-GM（64-pin vfqfn with exposed pad 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SI5345B-B-GM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI5345B-B-GM 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： SI5345B-B-GM ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Low-jitter B-GM implementation （对比 SI5345B-A-GM)
- Shared verified output ceiling （对比 SI5345B-D-GM)
- Configuration-specific ordering options （对比 SI5345B-B05221-GMR)
设计说明
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.
合规信息
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.
