ICS308RT - 200MHz Quad PLL Clock Synthesizer | Renesas
MPN: ICS308RT ✓ نشطICS308RT نظرة عامة
A phase-locked loop, or PLL, is a feedback-controlled clock-generation circuit that compares an output signal with a reference and adjusts a controlled oscillator until the phase and frequency relationship is maintained. A multi-PLL clock synthesizer extends this principle by deriving several related or independent clock outputs from one programmed device. The ICS308RT therefore serves as a central timing component for systems requiring more clock domains than a single-output oscillator can economically provide.
The principal feature of the ICS308RT is its six simultaneous outputs, each of which can be assigned a different frequency within the stated 250 kHz to 200 MHz operating range. This output count allows one synthesizer to support multiple domains such as processor clocks, communication interfaces, memory timing, converters, or signal-processing chains. Serial programmability also simplifies configuration by allowing the system controller to set the clock plan instead of relying on a large collection of discrete oscillators.
The quad-PLL architecture provides the timing foundation for six independently usable output frequencies, while the wide 200 MHz upper limit accommodates high-speed digital, communications, and control systems. Its 250 kHz lower range supports low-frequency timing and divided-clock requirements. Because all outputs are derived from one programmable package, the synthesizer can simplify clock-tree organization compared with multiple discrete crystal oscillators and dividers.
Typical applications include FPGA and processor clock trees, industrial control systems, communications equipment, audio and video processing, instrumentation, and multi-clock test systems. It is particularly useful when several buses or subsystems require synchronized clocks with different output rates. The six-output architecture can reduce component count and centralize clock configuration, although the final design must account for output jitter, reference quality, supply requirements, and channel-specific frequency limits.
When laying out a circuit using the ICS308RT, begin with the manufacturer pin-description and layout guidance in the datasheet. Preserve short, controlled-length clock routes, provide the required reference and decoupling connections, and validate every output frequency against the relevant PLL and output limits. Configuration should be tested with the intended reference clock because programming values, loop behavior, and board-level clock integrity determine the final frequency accuracy and phase-noise performance.
This page combines the device architecture, frequency capability, application guidance, package considerations, and verified cross-reference information in a form that supports component selection and engineering review. It also distinguishes documented operating facts from parameters that require confirmation from the full manufacturer datasheet before a production layout or replacement is approved.
بدائل مباشرة لـ ICS308RT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
ICS308RILF
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ICS308RT المواصفات
| Product Type | Serial-programmable quad-PLL VersaClock synthesizer |
| Minimum Output Frequency | 250 kHz |
| Maximum Output Frequency | 200 MHz |
| Number of PLLs | 4 PLLs |
| Number of Simultaneous Output Frequencies | 6 output frequencies |
| Programming Interface | Serial programming interface |
| Output Architecture | 6 simultaneous clock outputs |
دليل تكوين أطراف ICS308RT standard
تكوين الأطراف لـ ICS308RT (حزمة standard). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ ICS308RT.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
ICS308RT مناسب لـ 6 التطبيقs: FPGA Multi-Domain Clock Trees, Industrial Control and Data Acquisition, Communications Equipment, Audio and Video Processing, Test and Measurement Instruments, Programmable Embedded Systems.
FPGA Multi-Domain Clock Trees
The ICS308RT fits FPGA clock trees that require several related clock domains from one programmable source. Its four PLLs and six simultaneous outputs can support separate logic, memory, serial-interface, and peripheral frequencies while preserving a common clock-generation architecture. The documented 250 kHz-to-200 MHz range covers many common FPGA clock requirements. Engineers should assign each output according to its channel limits, use the manufacturer reference circuit, and validate timing margin with the actual reference source. Because programming is serial, the FPGA or an external controller can adapt the clock configuration during production, test, or system reconfiguration. Jitter and phase-noise requirements should be checked against the FPGA timing budget before use in a high-speed design.
موصى به
Industrial Control and Data Acquisition
The ICS308RT is appropriate for industrial control and data-acquisition systems that need deterministic clock domains for processors, converters, communication links, and sensors. Its six simultaneous outputs allow one programmable clock synthesizer to replace multiple fixed-frequency sources, while its serial interface supports controlled setup and test configurations. The 250 kHz lower limit accommodates low-frequency timing needs, while outputs up to 200 MHz can serve faster digital subsystems. For reliable implementation, the system should use a clean reference clock, short output routes, and separate return paths for clock and noisy digital signals. Timing margins must be verified over temperature and supply tolerance rather than inferred solely from nominal frequency values.
موصى به
Communications Equipment
The ICS308RT can serve communications equipment requiring several clock rates for serial links, processors, converters, and data-processing paths. With four PLLs and six simultaneous output frequencies, the device provides a compact way to organize a multi-rate clock tree while remaining programmable over a serial interface. The documented output span of 250 kHz to 200 MHz is useful for low-rate communication timing and faster digital interfaces. Design work should account for jitter, phase noise, reference stability, and crosstalk between clock outputs. PCB placement should preserve controlled return paths and minimize coupling from switching nodes, while validation should examine the complete reference-to-output chain under worst-case loading.
موصى به
Audio and Video Processing
The ICS308RT is well suited to audio and video processing systems where several subsystems may need independently programmable clocks from a common source. Its six outputs can serve digital signal processors, converters, serial links, and timing controllers, while the quad-PLL architecture simplifies synchronization planning. The 200 MHz maximum supports high-speed digital processing, and the 250 kHz minimum covers lower-rate timing functions. The designer must check output jitter and phase noise against converter and video-timing requirements. Place the clock synthesizer away from switching regulators and high-current digital returns, follow the manufacturer reference and decoupling guidance, and verify output performance with the actual oscillator and load configuration.
موصى به
Test and Measurement Instruments
The ICS308RT is useful in test and measurement instruments where several clock domains must be generated and changed under software control. Four PLLs and six simultaneous outputs can supply clock rates for converters, processors, interfaces, and trigger systems from one compact device. Its serial programmability allows instrument firmware to configure channels during self-test or calibration, while the 250 kHz-to-200 MHz range covers a broad selection of digital timing needs. For laboratory-grade performance, evaluate phase noise and jitter at each output rather than relying only on nominal frequency accuracy. Maintain short output paths, use a low-noise reference source, and include test points that permit characterization of each programmable clock channel.
موصى به
Programmable Embedded Systems
The ICS308RT fits embedded systems in which firmware or a supervisory controller must coordinate several clock domains. Its serial programming interface permits runtime or configuration-time control of the clock plan, and its six outputs can reduce the number of discrete oscillator and divider assemblies around a processor. The broad 250 kHz-to-200 MHz range supports low-speed peripheral timing as well as faster processor and interface clocks. Designers should reserve programming interface access for initialization and production test, include pull-ups as specified by the manufacturer, and create a deterministic startup sequence for dependent subsystems. The reference oscillator and supply layout remain critical because they establish the quality of all generated outputs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ICS308RT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ICS308RILF |
|---|---|---|
| Product Type | Serial-programmable quad-PLL VersaClock synthesizer | Quad-PLL VersaClock synthesizer |
| Brand | Renesas Electronics | Renesas Electronics |
| Package | TSSOP-20 | TSSOP-20 |
| Minimum Output Frequency | 250 kHz | 250 kHz |
| Maximum Output Frequency | 200 MHz | 200 MHz |
| Number of PLLs | 4 PLLs | 4 PLLs |
| Simultaneous Output Frequencies | 6 output frequencies | 6 output frequencies |
| Programming Interface | Serial programming interface | Serial programming interface |
أبرز الفروقات
- Six independently selectable clock outputs from one device (مقابلICS308RILF)
- Quad-PLL integration reduces clock-tree component count (مقابلICS308RILF)
- Serial configuration supports system-managed clock trees (مقابلICS308RILF)
ملاحظات التصميم
Place the ICS308RT close to the components receiving clock signals and route each output over a short, controlled-impedance path. Keep the serial programming and reference-clock routes away from switching-node and high-current return paths. The manufacturer layout guidance should be used for decoupling, grounding, and package-specific thermal connections; exact capacitor values and routing dimensions are not stated in the accessible product description.
Treat reference-clock quality as the foundation of every generated output. Use the reference network and connection method specified by the manufacturer, provide clean supply decoupling, and maintain a continuous return path beneath clock routes. Evaluate jitter and phase noise at the actual output pins with the intended loading and PCB configuration, because nominal frequency accuracy alone does not establish usable clock quality.
Do not assign all six outputs assuming identical channel limitations without checking the complete output-frequency and programming tables. Confirm the permitted VCO or PLL settings, reference ratio, output divider ranges, and startup behavior for every requested clock. Also verify the ordering code's temperature grade and package suffix; using only the family name can conceal incompatibilities between otherwise similar ICS308 variants.
معلومات الامتثال
The accessible part descriptions do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is treated as not applicable because the component is not identified as an automotive-qualified part.
