SI5324C-C-GM - 945MHz Jitter Attenuator | Skyworks
料号： SI5324C-C-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 |
SI5324C-C-GM 概述
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.
直接替换替代料： SI5324C-C-GM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SI5324A-C-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI5324E-C-GM
✅ 直接替换📋 参考替代料（不在目录中）
SI5324C-C-GMR
✅ 直接替换📋 参考替代料（不在目录中）
SI5324C-C-GM
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →SI5324C-C-GMR
✅ 直接替换📋 参考替代料（不在目录中）
SI5324C-C-GM 规格参数
| Device Type | Precision clock multiplier and jitter attenuator |
| Input Clock Frequency Range | 2 kHz to 710 MHz |
| Number of Input Clocks | 2 inputs |
| Output Clock Frequency Range | 2 kHz to 945 MHz |
| Selected Output Frequencies | Up to 1.4 GHz |
| Number of Output Clocks | 2 outputs |
| Output Jitter | 290 fs rms (12 kHz to 20 MHz) |
| Output Jitter | 320 fs rms (50 kHz to 80 MHz) |
| Loop Bandwidth Range | 4 Hz to 525 Hz |
| Programming Interface | I2C or SPI |
| Synthesis Architecture | DSPLL technology |
| Frequency Translation | Programmable frequency translation |
| External Reference Use | Supported as a clock source for frequency synthesis |
| Primary Applications | Ethernet WAN, SONET/SDH/STM, and video timing |
| 封装 | 36-QFN, 6 x 6 mm |
| 安装类型 | Surface mount |
| Output Divider Architecture | Two outputs divided separately from a common synthesis engine |
SI5324C-C-GM 36-qfn, 6 x 6 mm 引脚配置指南
SI5324C-C-GM（36-qfn, 6 x 6 mm 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： SI5324C-C-GM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI5324C-C-GM 适用于 6 应用s: Ethernet WAN Clock Conditioning, SONET and SDH Synchronization, Video Clock Generation, Optical Transport Timing, High-Speed Communication Test Equipment, Precision ADC and DAC Clocking.
Ethernet WAN Clock Conditioning
The SI5324C-C-GM fits Ethernet WAN clock-conditioning designs because it accepts input clocks from 2 kHz to 710 MHz and generates programmable outputs from 2 kHz to 945 MHz. Place it between a recovered or distributed reference and a timing subsystem that needs frequency translation or reduced phase noise. Its two-input architecture can support reference selection or redundant clock paths, while the 4 Hz-to-525 Hz loop-bandwidth range lets the designer balance jitter filtering against tracking. The verified 290 fs rms output jitter from 12 kHz to 20 MHz is useful for communication links requiring a cleaner local timing source. Validate lock behavior, input slew rate, reference stability, and the final output jitter budget in the actual board environment.
推荐
SONET and SDH Synchronization
The SI5324C-C-GM is suitable for SONET, SDH, and STM timing systems where a received reference may contain phase noise or accumulate timing error over a transport path. Its precision clock multiplier and jitter-attenuator architecture generates two related outputs from a common synthesis engine, allowing a design to derive service clocks without relying only on a fixed-ratio oscillator. The verified output range reaches 945 MHz, with selected frequencies up to 1.4 GHz. A system integrator should select the loop bandwidth based on the reference wander and jitter requirements, then confirm output amplitude, termination, and lock time using the manufacturer’s programming and application guidance.
推荐
Video Clock Generation
The SI5324C-C-GM can generate and condition video timing clocks when the system needs programmable frequency translation rather than a fixed crystal-derived frequency. Its two output clocks are divided separately from a common synthesis engine, allowing related video-clock domains to be derived from one controlled source. The verified frequency coverage from 2 kHz to 945 MHz and selected frequencies to 1.4 GHz provides broad coverage for video and digital timing subsystems. Because jitter requirements vary by video standard, the designer must use the applicable standard’s clock tolerance and jitter limits, verify the configured output frequency, and inspect signal integrity at the output with appropriate test equipment.
推荐
Optical Transport Timing
Optical transport equipment often needs a recovered or regenerated clock with lower phase noise before it reaches serializer, retimer, or transceiver circuitry. The SI5324C-C-GM provides two programmable input clocks, two outputs, frequency translation, and jitter attenuation, making it suitable for cleaning a reference used by high-speed optical interfaces. Its 290 fs rms jitter figure over 12 kHz to 20 MHz can help establish a clean reference for sensitive timing blocks, while the 4 Hz-to-525 Hz bandwidth permits deliberate filtering choices. The final design must verify optical-module requirements, output amplitude, reference quality, jitter transfer, lock time, and loss-of-reference behavior against the manufacturer datasheet.
推荐
High-Speed Communication Test Equipment
The SI5324C-C-GM is useful in test and measurement equipment that needs programmable, low-jitter clocks for exercising high-speed communication links. Instead of using a bank of fixed oscillators, a test system can configure frequency translation and loop filtering through I2C or SPI to create related clock domains. Two outputs can support simultaneous stimulus or reference relationships when the test architecture requires them. The verified jitter values provide a starting point for instrumentation budgets, but actual performance depends on the source, loop bandwidth, output load, measurement bandwidth, and PCB implementation. Use short controlled traces, appropriate termination, and measurement instrumentation that can resolve femtosecond-rms jitter without accidental noise pickup.
推荐
Precision ADC and DAC Clocking
The SI5324C-C-GM can serve as a programmable clock source for precision converters and other timing-sensitive analog systems when the converter clock must be translated or cleaned. Its dual-output capability allows one synthesis engine to provide related clocks, while the jitter-attenuation function helps reduce phase noise arriving from an external reference. The 290 fs rms low-band jitter and 320 fs rms mid-band jitter figures make the device relevant to systems with demanding clock-quality budgets. Actual usefulness depends on the converter’s required sampling-clock frequency, allowable jitter, isolation resistance, and clock amplitude. Confirm output drive, common-mode requirements, reference stability, and converter-specific layout guidance before integrating the clock generator.
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推荐产品汇总
工程参考数据： SI5324C-C-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 | SI5324A-C-GM | SI5324E-C-GM | SI5324C-C-GMR |
|---|---|---|---|---|
| Brand | Skyworks | Skyworks | Skyworks | Skyworks |
| Package | 36-QFN (6 x 6 mm) | 36-QFN (6 x 6 mm) - same-package claim requires final verification | 36-QFN (6 x 6 mm) - same-package claim requires final verification | 36-QFN (6 x 6 mm) |
关键差异点
- Higher verified frequency coverage than a simple clock buffer （对比 Basic fixed-frequency clock buffer)
- Programmable frequency translation and jitter attenuation in one device （对比 Fixed crystal oscillator)
- Low published jitter for precision timing systems （对比 Unfiltered clock distribution stage)
- Two-input and two-output architecture （对比 Single-input, single-output clock multiplier)
设计说明
Treat the SI5324C-C-GM clock inputs and outputs as high-speed, high-quality signal paths. Keep traces short, use controlled impedance when appropriate, provide the required termination and input slew rate, and isolate the clock from noisy digital return currents. The advertised 290 fs rms and 320 fs rms jitter figures describe specified conditions; board reflections, crosstalk, supply noise, and an unsuitable reference can degrade the actual result. Measure at the receiver rather than assuming the IC pin sees a clean waveform.
Design the power rails and decoupling around the manufacturer’s recommended application circuit. The supplied verified data does not provide the operating-voltage range or external-component values, so those values must be taken from the official Si5324 datasheet rather than inferred from a distributor category page. Place decoupling capacitors close to the relevant supply and ground pins, maintain a low-impedance return path, and verify that the external reference and oscillator network do not inject supply or ground noise into the clock outputs.
Use the manufacturer’s 36-QFN land pattern and pin map as the authority for PCB layout. Because the verified data identifies the package but does not list all pin names or the exposed-pad connection, do not manufacture a footprint or route power based on assumptions. Confirm pad dimensions, pin numbering, thermal-pad soldering, clock trace routing, ground-plane continuity, and programming-interface access against the current datasheet before release to fabrication.
A programmable frequency multiplier can appear unusable even when the IC is powered correctly if the input reference, loop bandwidth, output-divider values, or loss-of-reference handling are not configured properly. Validate lock acquisition, lock status, reference transitions, startup behavior, and output jitter using the intended system reference. The family supports I2C or SPI programming, but the exact mode, register map, and operating limits are device-specific and must be confirmed in the manufacturer documentation.
合规信息
The supplied manufacturer and distributor snippets do not provide definitive compliance declarations for this exact MPN. Compliance must be confirmed from current Skyworks documentation or supplier quality documentation before regulated use.
