Clock Synthesizer / Jitter Cleaner Integrated Circuit
Clock Synthesizers and Jitter Cleaners serve as the “conductors” or “heart” of electronic systems. They generate and maintain the precise timing reference (clock signals) required for entire circuits to operate.
IC-Mart Your Trusted Source for Clock Synthesizer / Jitter Cleaner Chips
(from leading manufacturers)
Global Manufacturers and Key Models
1. Skyworks (formerly Silicon Labs) — High-Performance Benchmark
- Jitter Attenuators: * Si5345 / Si5344 / Si5342: The classic “Any-Frequency” series, common in data centers and optical modules.
- Si5395 / Si5394 / Si5392: Premium versions with jitter performance dropping below 69fs RMS.
- Si5381 / Si5386: Specifically designed for wireless 4G/5G base stations.
- Clock Generators: * Si5341 / Si5340: Generates multiple arbitrary frequencies directly from a crystal without external references.
- Si5332: Low-power clock generators optimized for PCIe Gen1-6.
- Si5351: Highly cost-effective, I2C-programmable generators for consumer electronics.
2. Texas Instruments (TI) — Analog Performance & BAW Technology
- Jitter Cleaners: * LMK04832 / LMK04828: Industry-standard jitter cleaners for RF sampling and wireless base stations.
- LMK5C33216: Latest generation featuring BAW technology with jitter below 50fs.
- LMK04800 Series: Reliable legacy series for communication infrastructure.
- Clock Generators: * LMK03328: Ultra-low jitter dual PLL synthesizer.
- CDCE6214: Ultra-low power generator for mobile devices.
- RF Synthesizers: * LMX2594 / LMX2820: Wideband RF synthesizers supporting high frequencies up to 15GHz-22GHz.
3. Analog Devices (ADI) — Precision Sync & Data Conversion
- Jitter Attenuators: * HMC7044: High-performance dual-loop cleaner supporting JESD204B/C standards.
- AD9528: Clock distributor with integrated jitter purification for JESD204B.
- Clock Synchronizers (DPLL): * AD9546 / AD9545: Digital synchronizers for IEEE 1588 and SyncE.
- ADF4030: High-precision multi-channel synchronizer.
- Clock Generators: * AD9522 / AD9520 Series: Classic low-jitter clock generation and distribution chips.
4. Renesas (including former IDT) — PCIe & Consumer Leader
- ClockMatrix Series (High-Performance Sync): * 8A34001 / 8A34002: Large-capacity management units for 5G and high-bandwidth systems.
- VersaClock Series (General Purpose): * VersaClock 5 / 6E / 7 (e.g., 5P49V6901): Highly flexible programmable clocks for industrial and consumer boards.
- FemtoClock Series (Optical): * 8N3QV01 / 8N4Q001: Compact, low-jitter synthesizers designed for optical modules.
- PCIe Clocks: * 9FG104 / 9DBL04 / 9SQ440: The most common PCIe clock generators for global server motherboards.
5. Microchip — Reliable Synchronization Solutions
- Network Sync (DPLL): * DS31408: Classic 8-channel digital clock synchronizer.
- ZL30 Series (e.g., ZL30250): Flexible jitter cleaning and sync chips.
- Clock Synthesizers: * SM802123: Synthesizers optimized specifically for Ethernet environments.
- SY8983x Series: High-speed differential clock distribution and synthesis.
Selection Advice Table
| Application Scenario | Recommended Manufacturers | Recommended Model Series |
| Extreme Jitter Performance (< 70fs) | Skyworks / TI | Si539x, LMK5x series |
| High-Speed Sampling (ADC/DAC/JESD204B) | ADI / TI | HMC7044, LMK04832 |
| Servers/PCs (PCIe Gen5/6) | Renesas / Skyworks | 9FG series, Si522xx |
| 5G/Base Station Network Sync | ADI / Skyworks / Microchip | AD954x, Si538x, ZL30xxx |
| Industrial/Consumer Low-Cost | Renesas / Skyworks / TI | VersaClock, Si5351, CDCE series |
Top Chinese Domestic Manufacturers
1. Aura Semiconductor — Domestic Leader in Jitter Cleaning
- Jitter Cleaner: * Au5328 / Au5325: Flagship products with jitter performance reaching 46fs RMS. They compete with Skyworks’ Si534x and TI’s LMK048xx series in 5G base stations.
- Au5322: Multi-output high-performance jitter attenuator.
- Clock Generator: * Au51xx Series: Programmable generators for PCs and general industrial communications.
2. Montage Technology — Server & Data Center Specialists
- M9 Series (Clock Generator): Supports PCIe 6.0/CXL 3.0 for AI servers and high-performance computing.
- Clock Buffer: Over 20 models for lossless signal distribution.
- DDR5 CKD: Precision clock drivers for DDR5 memory modules.
3. 3PEAK (思瑞浦) — High-Reliability Industrial Solutions
- Clock Generation: TPL7xx series (e.g., TPL74x) offers high-performance programmable frequency synthesis.
- Jitter Cleaner: Designed for high-speed ADC/DAC circuits as alternatives to TI and ADI.
4. Novosense (纳芯微) — Automotive & Industrial Focus
- NS31xx Series: Programmable generators for automotive infotainment and industrial control.
- Features: High ESD protection and interference resistance for harsh environments.
5. Sillumin (茂睿芯) — High-Frequency & Sync
- SCLC Series: High-performance generators optimized for SyncE and IEEE 1588 standards.
Domestic vs. International Cross-Reference
| Category | International (TI/Skyworks/ADI) | Domestic Equivalent Suggestion |
| Ultra-low Jitter (5G/Core Network) | Si5345, LMK04832 | Aura Au5328 |
| Server/PCIe Gen5/6 | 9FG104, Si522xx | Montage M9 Series |
| Programmable Synthesis | VersaClock 6, Si5332 | Aura Au51xx, 3PEAK TPL series |
| High-Speed ADC/DAC Sampling | HMC7044, AD9528 | Aura Au5325, Sillumin SCLC series |
Clock Synthesizer / Jitter Cleaner IC Definitions and Use Cases
1. What are they?
- Clock Synthesizer: Performs “Frequency Conversion.” It takes a low-cost reference frequency (like a crystal) and uses an internal PLL to “synthesize” various frequencies for different system components (CPU, Ethernet, PCIe).+1
- Jitter Cleaner: Performs “Denoising.” It filters out “jitter”—tiny time deviations caused by interference or noise. This is critical for preventing bit errors in ultra-high-speed data transmission.
2. Typical Use Cases
- A. Telecom Infrastructure: Synchronizes 5G/6G signals to ensure stable connections.
- B. Data Centers: Provides low-jitter reference clocks for AI chips (GPU/NPU) and PCIe Gen 5/6 links.
- C. Data Conversion: Ensures precise timing for medical imaging (ultrasound) and radar sampling to avoid blurred signals.
- D. Pro Audio/Video: Solves 8K video sync and digital audio artifacts.
- E. Automotive: Acts as the “nerve center” for high-speed data synchronization in LiDAR and ADAS.
Four Core Categories
- Any-Frequency Jitter Attenuators: “Universal Converters” that accept almost any input frequency and output any required frequency with extreme noise filtering. Typical: Si5345, HMC7044, LMK04832.
- Network Sync & Digital Clock Chips (DPLL): Focus on “High-Precision Sync” across network sources. Supports IEEE 1588 and SyncE. Typical: AD9546, Si5383, DS31408.
- Application-Specific Clock Generators: Optimized for specific standards like PCIe or Ethernet to reduce cost and complexity. Typical: 9FG104, CDCE421, SM802123.
- Zero Delay Buffers & Conditioners: Ensures “Phase Alignment” by eliminating propagation delays between input and output. Typical: LMK03200, 8A34001.
Selection Logic Quick-Search
| Logic Requirement | Suggested Category | Key Representative Manufacturers |
|---|---|---|
| Need any frequency from an unstable source | Any-Frequency Jitter Attenuator | Skyworks, TI |
| Sync multiple remote clocks (5G/1588) | Network Synchronizer (DPLL) | ADI, Microchip, Skyworks |
| Only need standard PCIe or CPU clocks | Application-Specific Synthesizer | Renesas, TI |
| Multiple outputs with zero delay difference | Zero Delay Buffer | TI, Renesas |