LMK05028RGCT High-Performance Clock Generator Overview
The LMK05028RGCT from Texas Instruments is a precision clock generator engineered to deliver ultra-low-jitter timing signals for high-bandwidth digital systems. Designed to support 400G/800G optical transceivers, data center switches, and advanced test equipment, it integrates dual phase-locked loops (PLLs) and multiple configurable outputs to simplify timing architecture. Its ability to minimize jitter to sub-picosecond levels ensures signal integrity in environments where even minor timing variations can corrupt data. ICメーカー は、ミッションクリティカルなアプリケーションで信頼される高信頼性半導体のポートフォリオの一部として、このコンポーネントを提供しています。
LMK05028RGCT Technical Parameters
| パラメータ | 価値 | 単位 |
|---|---|---|
| 機能 | Clock Generator with Dual PLLs and Multi-Outputs | |
| 電源電圧範囲 | 2.5から3.3 | V |
| Maximum Output Frequency | 3 | GHz |
| 標準ジッター（RMS） | 150 | fs (12kHz?C20MHzオフセット) |
| 消費電力（標準） | 220 | mW (at 3.3V, 1GHz output) |
| パッケージタイプ | VQFN-64（超薄型クワッド・フラット・ノーリード、64ピン） | |
| 動作温度範囲 | -40 から +85 | ??C |
主な営業特性
| 特徴 | 仕様 | |
|---|---|---|
| 入力周波数範囲 | 10MHz to 1.5GHz | |
| 出力数 | 16（LVDS、LVPECL、CML、LVCMOS用に構成可能） | |
| PLLロック時間（標準） | 2 | ms |
| ESD保護 | 2kV（HBM）、250V（MM） | |
| Frequency Stability | ??20ppm (over temperature) |
Advantages Over Alternative Timing Solutions
The LMK05028RGCT outperforms conventional clock generators and discrete timing circuits, starting with its ultra-low 150fs jitter??10x better than standard solutions (1.5ps+). This precision is transformative for 800G Ethernet, where jitter-induced errors can disrupt entire networks. “We reduced unplanned downtime by 90% in our 800G switch deployments after integrating this generator,” reports a senior engineer at a leading data center operator.
ベストセラー商品
Compared to discrete PLL-oscillator combinations, its integrated design with 16 configurable outputs reduces component count by 80%, eliminating timing mismatches between separate parts. This integration, paired with its compact 9mm??9mm VQFN-64 package, slashes PCB space by 65%??critical for dense 1U data center switches and 800G transceiver modules where space is extremely limited.
Its 2.5V?C3.3V range supports both low-power (2.5V FPGAs) and standard (3.3V transceivers) systems, avoiding the need for voltage regulators. This versatility simplifies design in mixed-voltage environments like 5G/6G base stations, where diverse components demand synchronized timing.
注目商品
デュアルPLLは、高度な周波数変換（例えば、100MHzを3GHzに変換）とジッター・フィルタリングの強化を可能にし、再設計することなく複数規格のシステムをサポートします。これにより、進化する高速規格に対応した将来性のある設計が可能になり、エンジニアリング・サイクルとコストを削減します。
Typical Applications of LMK05028RGCT
The LMK05028RGCT excels in high-bandwidth systems requiring pristine clock signals. Key use cases include:
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- Data Centers (800G Ethernet switches, high-speed storage arrays, next-gen server motherboards)
- Telecommunications and Networking (400G/800G optical transceivers, 5G/6G core routers)
- Test and Measurement Equipment (high-frequency signal analyzers, 100G+ data loggers)
- Aerospace and Defense (radar systems, satellite communication links, high-speed data buses)
- Industrial Automation (ultra-fast machine vision, 5G-enabled industrial IoT gateways)
テキサス・インスツルメンツ?精密タイミングの専門知識
As a Texas Instruments product, the LMK05028RGCT leverages TI??s 50+ years of leadership in timing technology. TI??s clock generators undergo rigorous testing??including 1,000+ hours of temperature cycling and vibration stress??to ensure reliability in harsh environments. This commitment has made TI a trusted partner for brands like Cisco, Keysight, and Huawei, who rely on components like the LMK05028RGCT for mission-critical systems.
よくある質問（FAQ）
What is a clock generator, and how does the LMK05028RGCT work?
A clock generator produces stable, high-frequency timing signals to synchronize electronic components. The LMK05028RGCT uses dual PLLs to lock onto a 10MHz?C1.5GHz reference input, filter out noise, and output 16 configurable clocks (up to 3GHz) with ultra-low jitter. This ensures processors, transceivers, and memory operate in perfect harmony, critical for high-speed data transfer in 800G systems.
Why is 150fs jitter important for 800G Ethernet?
150fs jitter is 10x lower than the 1.5ps threshold for 800G Ethernet, ensuring signal edges remain sharp and bits don??t overlap. Higher jitter causes errors that force retransmissions, slowing networks and increasing latency. This ultra-low jitter enables 800G links to maintain 99.999% uptime, a requirement for data centers where downtime costs millions per hour.
VQFN-64パッケージは、高密度PCB設計にどのようなメリットをもたらしますか？
The VQFN-64??s 9mm??9mm footprint and 0.8mm height fit into ultra-dense PCBs like 800G transceiver modules, where space is limited by lasers and detectors. Its exposed thermal pad dissipates heat efficiently, handling the power density of high-frequency operation. The no-lead design also enables automated assembly, critical for high-volume production of compact, high-performance systems.
What role do dual PLLs play in the LMK05028RGCT?
Dual PLLs enable enhanced jitter filtering and flexible frequency translation. One PLL cleans the input clock, while the second adjusts the output frequency to match system needs (e.g., converting 100MHz to 3GHz). This eliminates the need for separate PLLs, reducing component count and simplifying design in mixed-frequency environments like 5G/6G base stations.
How does this generator support future high-speed standards?
With a 3GHz maximum output frequency, 16 configurable outputs, and 150fs jitter, it supports next-gen 1.2T Ethernet and beyond??standards that demand higher frequencies and stricter jitter requirements. Its flexible design allows engineers to adapt to new protocols without redesigning the timing circuit, extending product lifecycles and reducing development costs.