ICS308RI - 200MHz Quad-PLL Clock Synthesizer | Renesas
Teilenummer: ICS308RI ✓ AktivICS308RI Übersicht
A PLL clock synthesizer is a clock-and-timing semiconductor that generates, divides, multiplies, and phases a reference clock to produce one or more stable output frequencies. The quad-PLL architecture expands this role into a multi-output clock-generation hub. In system terms, the ICS308RI belongs to the PLL synthesizer family, clock-generation ICs, clock-and-timing ICs, and the broader integrated-circuit and semiconductor hierarchy.
The principal feature is simultaneous generation of up to six output frequencies across a 250 kHz to 200 MHz range. Serial programmability allows system designers to configure divider ratios and output relationships instead of relying on a fixed-frequency oscillator. This makes the ICS308RI useful when several clock domains require independent or related rates while sharing one reference source. Its four internal PLL channels provide more configuration flexibility than a basic single-output clock generator.
The ICS308RI is specified as a clock/frequency synthesizer IC with a maximum frequency of 200 MHz. The manufacturer documentation identifies the device as a serial-programmable quad-PLL VersaClock synthesizer, which describes both its programming interface and its four-PLL architecture. Its 20-pin SSOP package supports surface-mount PCB assembly and preserves a relatively compact board footprint for multi-clock systems.
Typical applications include communications equipment, networking infrastructure, industrial control systems, data-conversion equipment, and embedded systems that need several internally related clock outputs. A single reference clock can be multiplied and divided to support multiple converters, processors, or interface blocks. The ability to produce six frequencies simultaneously can simplify clock-tree design and reduce the number of separate synthesis devices required on a board.
When integrating the ICS308RI, verify the reference-clock range, supply requirements, programming interface, output-drive characteristics, and output-frequency limits against the manufacturer datasheet before finalizing the PCB. Preserve short, controlled traces around the clock inputs and outputs, provide the required bypass capacitors, and account for output jitter when routing sensitive clock signals.
This page organizes the ICS308RI core specifications, application guidance, pin-package information, and drop-in replacement information into a design-focused resource for engineers evaluating programmable clock-generation architectures.
Drop-in-Alternativen für ICS308RI – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ICS308RI (gleiche Bauform und Footprint) – abweichend in Architecture, Device Type, PLL Count.
ICS308R
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →ICS308R
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →ICS308RI Technische Daten
| Device Type | Clock/Frequency Synthesizer IC |
| Architecture | Quad-PLL VersaClock synthesizer |
| Configuration Interface | Serial programmable |
| Maximum Output Frequency | 200 MHz |
| Minimum Output Frequency | 250 kHz |
| Simultaneous Output Frequencies | Up to 6 |
| PLL Count | 4 |
| Package Type | 20-SSOP |
| Package Width | 3.90 mm |
| Package Width, Imperial | 0.154 inch |
| Pin-Anzahl | 20 |
| Montageart | Surface mount |
ICS308RI 0.154 inch Pinbelegungsleitfaden
Pinbelegung für ICS308RI (0.154 inch-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für ICS308RI.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ICS308RI ist geeignet für 6 Anwendungs: Network Interface Clocking, Communications Equipment, Industrial Control Systems, Data-Acquisition and Conversion, Embedded Processor Platforms, Test and Measurement Instrumentation.
Network Interface Clocking
The ICS308RI fits network-interface clocking because its four PLL channels and as many as six simultaneous outputs can derive multiple related frequencies from one reference source. The 250 kHz to 200 MHz range covers low-speed management clocks through high-speed digital interface requirements. Place the synthesizer near the clock-consuming circuits, route outputs as controlled 50-ohm transmission lines, and program divider ratios that preserve each receiver's required setup and hold margins.
Empfohlen
Communications Equipment
The ICS308RI is appropriate for communications equipment that requires several clock domains from a common reference. Four PLL channels offer the architecture for generating up to six frequencies simultaneously, while the 200 MHz ceiling supports demanding digital blocks. Design the reference input for low jitter, isolate noisy circuitry from clock supplies, and validate startup sequencing so that downstream transmitters, receivers, and processors do not receive out-of-range clocks during initialization.
Empfohlen
Industrial Control Systems
The ICS308RI can organize the clock tree in an industrial control system by supplying several deterministic frequencies to processors, converters, communication controllers, and timing peripherals. The 250 kHz to 200 MHz span accommodates both low-rate supervisory clocks and faster processing domains. Before release, verify the operating-temperature and electrical limits in the manufacturer datasheet, then use independent reset or enable control downstream to prevent incorrect data transfer during power-up.
Empfohlen
Data-Acquisition and Conversion
The ICS308RI is useful in data-acquisition and signal-conversion systems that need coherent sampling and processing clocks. Multiple derived outputs can support converter sample rates, digital filters, interface bridges, and control logic without deploying separate oscillators. The programmable architecture allows output frequencies to be related mathematically, which simplifies clocking schemes requiring a fixed ratio. Confirm jitter, output-drive capability, and maximum clock frequency against the particular converter and isolation architecture before layout release.
Empfohlen
Embedded Processor Platforms
The ICS308RI fits embedded processor platforms that require peripheral, bus, and communication clocks derived from one stable reference. Its serial programming interface allows firmware or a boot controller to configure output relationships, and the six-output capability can simplify platform clock distribution. Keep the programming bus away from sensitive clock traces, establish a deterministic startup order, and verify that every enabled output reaches its intended frequency before releasing downstream reset signals.
Empfohlen
Test and Measurement Instrumentation
The ICS308RI can provide programmable clock outputs for test and measurement instruments that need several coordinated rates in one design. The 250 kHz to 200 MHz range supports low-rate control functions and faster sampling or processing chains. Use independent output enables where available and confirm that programming changes do not create unacceptable transients on sensitive loads. Layout should minimize coupling between outputs and sensitive analog sections to preserve measurement quality.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ICS308RI – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ICS308R | ICS308 |
|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 20-SSOP | 20-SSOP | 20-SSOP |
| Device Type | Clock/Frequency Synthesizer IC | Clock/Frequency Synthesizer IC | Serial Programmable QUAD PLL Versaclock Synthesizer |
| Architecture | Quad-PLL | Quad-PLL | Quad-PLL |
| Simultaneous Output Frequencies | Up to 6 | Up to 6 | Up to 6 |
| Configuration Interface | Serial programmable | Serial programmable | Serial programmable |
Wichtigste Unterscheidungsmerkmale
- Documented terminal and package compatibility (vs. ICS308R)
- Four-PLL multi-output architecture (vs. ICS308)
- Broad programmable frequency coverage (vs. ICS308R)
Designhinweise
Place the ICS308RI close to the clock-consuming circuits and keep the reference input, serial interface, and clock outputs on controlled routing. Use the shortest practical paths for clock nets, avoid crossing them with high-current switching paths, and provide a continuous ground reference beneath the device. If output frequency changes during operation, analyze the transient at each receiver rather than assuming every interface tolerates a new edge at the same instant.
Decouple the supply pins in accordance with the manufacturer datasheet and keep the high-frequency return path close to each capacitor connection. Separate the reference-clock source from switching-converter return currents where possible. Validate startup by observing all enabled outputs after programming; incorrect divider or configuration values can create a valid clock at an unintended frequency rather than an obvious lack of clock.
Do not infer a complete pinout from a similar PLL device. Use the ICS308RI pin-description table to assign VDD, ground, reference inputs, serial data, clock outputs, and any enable or test terminals. Similarly, confirm that a proposed replacement uses the same 20-SSOP terminal arrangement and programming behavior; package similarity alone does not prove that every pin has the same signal function.
Budget clock jitter for the complete signal path, including the reference oscillator, ICS308RI output, PCB loading, and receiving device. Match output connections to the expected impedance and avoid unnecessary stubs or test-point branches on high-frequency clock nets. When multiple outputs drive dissimilar loads, evaluate rise time, edge distortion, and crosstalk independently because one device configuration does not guarantee equal signal integrity on every output.
Compliance-Informationen
The manufacturer datasheet identifies the ICS308RI as a clock/frequency synthesizer IC; no explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified for this exact ordering code.
