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ICS1526G - 110MHz Clock Synthesizer, 16-TSSOP | Renesas
ICS1526G

ICS1526G - 110MHz Clock Synthesizer, 16-TSSOP | Renesas

The Renesas Electronics ICS1526G is a low-cost, high-performance clock/frequency synthesizer IC with a maximum operating frequency of 110 MHz, packaged in a 16-pin TSSOP (0.173 inch, 4.40 mm width). It is built on IDT's advanced low-voltage CMOS mixed-mode technology and is positioned as a general-purpose phase-controlled clock synthesis solution as well as a line-locked and genlocked high-resolution video timing generator. A clock synthesizer (also called a PLL-based frequency generator or clock generator IC) is a timing IC that multiplies, divides, or regenerates a reference clock into one or more stable output frequencies. It belongs to the clock and timing hierarchy inside integrated circuits, sitting between a crystal oscillator and the logic, memory, or display circuitry that consumes the clock. Unlike a simple crystal oscillator, a PLL-based synthesizer can derive many related output frequencies from one low-frequency reference and can phase-align those outputs to an external video sync source. Key characteristics of the ICS1526G include a 110 MHz maximum frequency, a single clock/frequency synthesizer function, and 16-TSSOP surface-mount packaging. The device is specifically suited to video projectors and displays across multiple resolutions, where the master oscillator frequency and lock behavior determine whether the generated timing is stable enough for pixel-perfect image reproduction. Technically, the ICS1526 relies on a phase-locked loop to lock an internal VCO to a reference input, then divides or multiplies that locked frequency down to the desired output. The mixed-mode CMOS implementation combines analog loop control with digital frequency programming, which is why phase adjust and lock detection features are central to its use in genlocked video systems. Typical applications include video projector timing generation, professional video monitoring equipment, broadcast and studio reference distribution, genlocked display systems, industrial imaging panels, and general-purpose clock trees for consumer and industrial electronics where a single reference source must fan out to multiple derived clocks. When designing with the ICS1526G, verify the reference frequency window, the required output divider ratios, and loop lock acquisition time for your target video standard. Also confirm that your output jitter and skew budget is satisfied before committing to the part, since these parameters are not published in the distributor listings summarized on this page. This page consolidates distributor availability, package details, drop-in alternatives from the same Renesas/IDT clock-generator family, and practical design guidance that is not consolidated in any single distributor product page.

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ICS2402M - Multiplier Zero Delay Buffer | Renesas
ICS2402M

ICS2402M - Multiplier Zero Delay Buffer | Renesas

The Renesas ICS2402M is a multiplier and zero-delay buffer integrated circuit with one single-ended LVCMOS output, supplied in an 8-pin SOIC package. The device uses ICS proprietary analog/digital phase-locked-loop techniques to multiply an input clock and reproduce a buffered clock output with low propagation delay. Its clock-buffer function makes it suitable for clock distribution, frequency conversion, communications, industrial control, and other systems requiring a multiplied or redistributed clock signal. A zero-delay buffer, or ZDB, is a clock and timing semiconductor that combines frequency multiplication or conditioning with buffered clock propagation. In the broader product hierarchy, ICS2402M belongs to clock and timing ICs and ultimately to the semiconductor category. Unlike a passive resistor-and-capacitor delay line, an active ZDB uses PLL techniques to establish the output relationship and provide a low-delay clock output. The verified product information identifies the ICS2402M as a multiplier and zero-delay buffer, with one LVCMOS output and a single-ended signal arrangement. The 8-SOIC package supports conventional surface-mount PCB assembly. Verified distributor information also identifies the component as lead-free and RoHS compliant. Exact operating limits, supply-voltage range, supported multiplication ratios, frequency range, output impedance, and timing tolerances were not present in the supplied source excerpts and therefore require confirmation from the manufacturer datasheet before design release. Technically, the ICS2402M integrates analog and digital PLL methods to multiply a reference clock while buffering the result. This architecture is intended to reduce the timing penalty normally encountered when a system must distribute a clock derived from a lower-frequency reference. The single-ended LVCMOS interface can simplify connection to conventional digital logic, but signal-integrity review remains necessary because PLL multipliers can amplify supply noise and produce clock-related harmonics. Typical uses include processor and communications clock generation, frequency-interface bridging, industrial data-acquisition systems, and retrofit designs requiring a clock output derived from an existing reference. In each case, the designer must confirm that the selected multiplier ratio, input frequency, output frequency, and supply voltage fall within the limits documented for the exact ICS2402M ordering configuration. For implementation, begin by reviewing the pin assignment and recommended decoupling in the manufacturer datasheet, then validate the output waveform with the intended clock load. Keep the clock trace short where possible, provide a clean return path, and account for PLL lock and startup behavior in the system timing budget. Because the verified excerpts do not provide the complete timing table, board release should be conditional on checking the official electrical characteristics and reference circuit. This product record combines verified device identity, package, interface, regulatory, and sourcing information with application-specific design guidance. It also separates confirmed facts from parameters that remain unavailable, helping engineers distinguish source-backed characteristics from values that still require datasheet confirmation.

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ICS252PM - 200MHz Dual-Output Clock Synthesizer | Renesas
ICS252PM

ICS252PM - 200MHz Dual-Output Clock Synthesizer | Renesas

The Renesas Electronics ICS252PM is a field-programmable dual-output spread-spectrum VersaClock synthesizer with an operating output-frequency range up to 200 MHz in an 8-SOIC package. The device generates two independently programmable output frequencies and is intended for clock and frequency-distribution systems requiring programmable frequency generation with spread-spectrum clocking. A clock synthesizer is a clock-and-timing integrated circuit that generates or distributes one or more related clock signals. In the broader hierarchy, ICS252PM belongs to the clock generator and frequency synthesizer family, within clock and timing ICs and ultimately the semiconductor category. Its dual-output architecture can reduce the number of separate oscillator and distribution components required in a system. The verified product information identifies ICS252PM as a low-cost, field-programmable, dual-output clock synthesizer capable of generating two output frequencies from 314 kHz to 200 MHz. The 200 MHz upper limit makes the device applicable to communication equipment, storage systems, computer peripherals, and other systems requiring a programmable clock. Spread-spectrum operation can reduce peak spectral concentration, although exact modulation settings and implementation limits must be confirmed in the manufacturer datasheet. The ICS252PM uses independently programmable output stages rather than a fixed-frequency oscillator arrangement. This allows one device to serve multiple clock domains when two related but unequal frequencies are required. Because it is a digital-programmable clocking component, board design should account for trace propagation, output loading, supply integrity, and EMI behavior associated with high-frequency clock distribution. The part is offered in an 8-SOIC package, providing a conventional surface-mount footprint for PCB assembly. In an 8-SOIC, the exact pin names, programming interface, supply voltage, output-drive capability, operating-temperature range, and electrical limits are not supplied in the verified excerpts and are therefore identified as data needed rather than estimated. Typical uses include clock generation for networking and communication equipment, read/write timing in storage systems, industrial control electronics, and embedded computing platforms. Validate the required frequency range, jitter, skew, supply voltage, and output configuration against the complete manufacturer datasheet before releasing a production design. This product record combines verified distributor identification, package and frequency information, sourcing links, application guidance, and practical selection criteria. It distinguishes explicitly verified facts from parameters that still require confirmation, helping engineers avoid unsupported assumptions while locating an ICS252PM replacement or equivalent.

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ICS270PG - 200MHz Triple-PLL VCXO Clock Synthesizer | Renesas
ICS270PG

ICS270PG - 200MHz Triple-PLL VCXO Clock Synthesizer | Renesas

Renesas Electronics Corporation ICS270PG is a field-programmable voltage-controlled crystal oscillator and triple-PLL clock synthesizer that generates up to eight high-quality, high-frequency clock outputs. It supports a maximum frequency of 200 MHz, uses a crystal input, provides CMOS outputs, includes PLL bypass, and is packaged in a 20-pin TSSOP measuring 0.173 inch, or 4.40 mm, wide. A clock synthesizer is an integrated timing device that accepts a reference source and derives one or more stable, programmable clock outputs for digital systems. A VCXO adds voltage-controlled frequency adjustment to the crystal reference, while a PLL multiplies or divides that reference to produce the required output frequencies. The ICS270PG combines both functions in a clock and timing IC, allowing one reference crystal to serve multiple clock domains. Its principal features include three phase-locked loops, PLL bypass capability, one internal clock circuit, a crystal reference input, and CMOS output signaling. The synthesizer can generate as many as eight outputs, including multiple reference clocks originating from a low-frequency reference source. This output flexibility reduces the number of separate oscillators required in systems requiring related but unequal clock rates. The triple-PLL architecture separates clock-generation functions that might otherwise require multiple oscillator and divider combinations. PLL bypass is useful during configuration, test, or operating conditions where a directly derived clock path is preferred. CMOS outputs are suitable for interfacing with modern digital logic, while the 200 MHz maximum output frequency supports demanding processor, communications, data-conversion, and industrial control clock trees. Typical applications include communications infrastructure, instrumentation, industrial automation, test and measurement equipment, data-acquisition systems, and embedded control platforms. In each case, the device can centralize multiple clock requirements around a crystal reference and provide programmable outputs instead of requiring a separate oscillator for each frequency domain. The multiple reference outputs can support communication links, data converters, memory interfaces, and digital control logic within one clock tree. The principal design consideration is the device's programmed configuration and the resulting relationships among its three PLLs, reference outputs, and output dividers. Review the manufacturer datasheet's pin-description table, recommended external components, clock-output constraints, and programming procedure before laying out a new board. PCB placement should minimize clock traces and keep the crystal and associated components close to the device. This product page summarizes the documented architecture, package information, output capability, and practical design considerations of the ICS270PG. It also distinguishes verified technical facts from details that still require confirmation from the manufacturer datasheet, helping engineers plan the architecture without overlooking programming, layout, or qualification work.

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ICS271PG - Triple PLL VCXO Clock Synthesizer | Renesas
ICS271PG

ICS271PG - Triple PLL VCXO Clock Synthesizer | Renesas

The Renesas Electronics ICS271PG is a triple-PLL, field-programmable VCXO clock synthesizer that generates up to six high-quality clock outputs and operates up to 200 MHz in a 20-pin TSSOP package. It accepts a crystal input, provides CMOS outputs, supports PLL bypass, and combines one clock-synthesis circuit with multiple reference and high-frequency outputs. These characteristics make it suitable for systems that require flexible clock generation from a low-frequency crystal source. A VCXO, or voltage-controlled crystal oscillator, is a clock-generation technique in which an oscillator’s frequency can be controlled by an external voltage. A field-programmable VCXO clock synthesizer extends that concept by combining crystal-referenced timing with programmable phase-locked loops and selectable output divisions. Within the broader hierarchy, the ICS271PG belongs to the clock and timing IC category, specifically the PLL and frequency-synthesizer class, and can replace multiple discrete crystal and oscillator arrangements when system designers need several related frequencies from one reference. Key features include three PLL capability, up to six generated clock outputs, a maximum frequency of 200 MHz, CMOS output logic, crystal input, and PLL bypass operation. The six-output architecture supports systems that need both reference clocks and higher-frequency working clocks. Field programming allows the device to be configured for different output requirements, while PLL bypass provides a path for systems that need to select between synthesized and direct-reference operating conditions during design or validation. Technically, the ICS271PG uses a crystal-referenced architecture with programmable PLL and output stages. The low-frequency crystal source establishes a stable reference from which the internal synthesis circuitry can derive multiple clock outputs. CMOS output signaling supports integration with digital logic operating in the same clock domain. Because the device is controlled through VersaClock software according to its documentation, configuration should be completed with the intended output frequencies, divider relationships, and operating modes validated together rather than selected independently. Typical applications include communications equipment, interface controllers, digital signal processing systems, test and measurement instruments, and embedded systems that require several coordinated clock outputs. It can also serve clock-distribution designs where a central synthesizer offers a more scalable alternative to multiple separately sourced oscillators. In each case, the main design benefits are centralized referenceing and programmable output relationships. The primary design consideration is preserving clean, deterministic clock behavior across every enabled output. Use the manufacturer’s configuration procedure, validate each output against its assigned load, and check startup and bypass transitions with the final system timing budget. PCB layout should follow the datasheet guidance for crystal connections, supply decoupling, and output routing to minimize jitter and crosstalk. This page organizes the device’s clock-generation characteristics, drop-in candidate listings, application guidance, and engineering design considerations. It is intended to help engineers compare the ICS271PG with equivalent field-programmable clock synthesizers before committing to a board design or production sourcing plan.

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ICS275PG - 200MHz Triple-PLL VCXO Clock Synthesizer | Renesas
ICS275PG

ICS275PG - 200MHz Triple-PLL VCXO Clock Synthesizer | Renesas

The Renesas Electronics ICS275PG is a triple-PLL field-programmable VCXO clock synthesizer with a maximum output frequency of 200 MHz, supplied in a 16-pin TSSOP surface-mount package. It operates from a 3.135 V to 3.465 V supply, accepts a crystal reference input, provides CMOS clock outputs, and can generate as many as four high-quality clock outputs. A VCXO, or voltage-controlled crystal oscillator, is a clock-generation architecture that combines a crystal oscillator with voltage-controlled frequency adjustment. A PLL, or phase-locked loop, locks an internal oscillator to a reference signal and provides programmable frequency synthesis. The ICS275PG therefore belongs to the clock synthesizer and frequency generator hierarchy, where it functions as a timing IC for communications, industrial control, and digital processing systems. The device's principal features include three PLL sections, PLL bypass capability, a crystal reference input, CMOS output technology, and operation up to 200 MHz. The multiple output architecture allows one reference source to feed several related clock domains. Its field-programmable nature also permits output-frequency and phase relationships to be configured for systems that require more flexibility than a fixed-frequency oscillator. The ICS275PG uses a 3.3 V-class supply range centered on the conventional 3.3 V operating point. Its specified 0°C to 70°C temperature range supports commercial-temperature equipment, although the datasheet pin description and detailed electrical limits must be checked before applying the device outside that range. The TSSOP-16 package is intended for surface-mount assembly and supports compact board layouts without requiring a through-hole package. Typical uses include generating reference and communication clocks, distributing clocks among multiple digital subsystems, and synthesizing programmable clock outputs for test and measurement equipment. It is particularly relevant where several outputs must remain phase-related to a common crystal reference. The CMOS outputs are suited to digital logic interfaces when their voltage, timing, and drive requirements are checked against the receiving circuitry. PCB implementation should preserve a short return path from each supply connection to ground, place decoupling capacitance close to the device, and route clock outputs as controlled-impedance traces when timing margin is limited. Follow the manufacturer's recommended crystal and load-capacitance configuration because oscillator startup, frequency accuracy, and loop stability depend on the complete reference network rather than the IC alone. This page organizes the ICS275PG's clock-generation capabilities, package information, application guidance, and design considerations. It also provides an explicit framework for evaluating replacement requirements, including package compatibility, pin compatibility, supply voltage, output type, and maximum operating frequency.

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ICS276PG - Triple PLL 200MHz VCXO | Renesas Electronics
ICS276PG

ICS276PG - Triple PLL 200MHz VCXO | Renesas Electronics

The Renesas Electronics ICS276PG is a triple-PLL field-programmable VCXO clock synthesizer with three clock outputs, a maximum frequency of 200 MHz, crystal input, and CMOS output in a 16-pin TSSOP package. It operates from a 3.135 V to 3.465 V supply and includes a PLL bypass function for flexible clock-generation architectures. A VCXO is a voltage-controlled crystal oscillator, while a clock synthesizer combines oscillator and programmable frequency-generation functions into a timing IC. The ICS276PG belongs to the clock and frequency synthesizer category, within the broader clock and timing IC and semiconductor hierarchies. Its architecture is intended to generate multiple related clock outputs from a reference source while supporting frequency programming and PLL bypass operation. Three independently available output positions provide flexible clock distribution for systems that require multiple reference or working clocks. A maximum output frequency of 200 MHz makes the device suitable for communications, control, test, instrumentation, and digital processing systems operating from a single reference crystal. CMOS outputs support integration with modern digital logic, while the field-programmable architecture simplifies adaptation across different clock plans. The ICS276PG uses a single PLL circuit with bypass capability and accepts a crystal reference. PLL synthesis enables the device to derive one or more output frequencies from the reference, while bypass provides a path for configurations that require the reference clock directly. The 3.135 V minimum and 3.465 V maximum supply limits indicate a narrow, regulated 3.3 V operating environment, so the system supply must remain within that range during startup, steady-state operation, and frequency changes. Typical uses include communications transceiver clocking, instrumentation clock trees, embedded-control reference generation, FPGA or processor timing support, and multi-output laboratory systems. Its three-output architecture is especially useful when several logic domains need coherent clocks, although jitter, supply-noise behavior, output configuration, and programming details must be checked against the complete manufacturer datasheet before high-volume clock-tree deployment. A key implementation consideration is the relationship between the 3.3 V supply tolerance and the device specification. Decoupling should be placed close to the supply pins, the crystal network must follow the recommended layout, and every output must be checked for the required frequency, amplitude, and loading. Avoid assigning functions to a pin until its output configuration and routing requirements have been confirmed in the pin-description table.

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ICS280PG - 200MHz Triple PLL Spread Spectrum Clock Generator | Renesas Electronics
ICS280PG

ICS280PG - 200MHz Triple PLL Spread Spectrum Clock Generator | Renesas Electronics

The Renesas Electronics ICS280PG is a field programmable triple-PLL spread spectrum clock synthesizer that generates up to four high-quality CMOS clock outputs with a maximum frequency of 200 MHz, packaged in a 16-pin TSSOP (0.173 in / 4.40 mm wide) surface-mount package. A clock generator is a timing IC that converts a single reference input into multiple synchronized output clocks. A clock synthesizer adds phase-locked loop (PLL) multiplier and divider stages so one low-frequency crystal or clock reference can drive many higher or lower frequency domains. A spread spectrum clock generator additionally dither the output edge position over time, spreading electromagnetic energy across a band and reducing peak radiated emissions. The ICS280PG combines all three functions in one device: reference conditioning, triple-PLL synthesis, and four-way clock fanout with spread spectrum modulation. Key features of the ICS280PG include three independent PLL blocks with a bypass mode, up to four CMOS outputs, a maximum output frequency of 200 MHz, and field programmability of the synthesis and modulation parameters. Accepting either a crystal or an external clock as reference, the device lets a designer change output frequencies and modulation profiles without changing the board layout. Its 16-TSSOP body keeps the footprint compact enough for cost-sensitive consumer, industrial and networking equipment while supporting surface-mount assembly at line speed. Architecturally the part pairs a programmable reference stage with three PLL multipliers and dividers feeding four CMOS output buffers. Because each PLL can be bypassed, the same device can pass the reference through unmodified for one clock domain while synthesizing two additional domains, which simplifies clock tree design in systems that mix legacy and modern clock requirements. CMOS output drive gives rail-to-rail compatible levels for downstream CMOS logic, and spread spectrum modulation reduces the spectral peak of the fundamental without changing the average output frequency. Typical applications include server and storage platform clock trees, set-top box and digital set-top clocking, networking equipment with multiple clock domains, industrial control modules, and any consumer or embedded product where radiated emissions must be reduced to meet EMC limits while keeping a single reference source. When designing around the ICS280PG, treat the reference input and output routing as a controlled-impedance clock network and check the datasheet pin description table before assigning tracks; spread spectrum modulation only reduces emissions if the downstream traces and connectors do not act as antennas. This page adds practical context that a manufacturer datasheet alone does not provide: a parameter-by-parameter comparison table, drop-in ordering alternatives with the temperature and packaging differences made explicit, and design notes covering PLL bypass, spread spectrum settings and EMI verification practice.

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ICS281PG - 200 MHz Triple-PLL Clock Synthesizer | Renesas
ICS281PG

ICS281PG - 200 MHz Triple-PLL Clock Synthesizer | Renesas

Renesas Electronics ICS281PG is a field-programmable triple-PLL spread-spectrum clock synthesizer with a maximum output frequency of 200 MHz, one synthesizer circuit, CMOS outputs, and a 16-pin TSSOP package measuring 4.40 mm in width. It accepts either a clock or crystal reference input and provides a programmable input-to-output ratio of 1:3. A clock synthesizer generates stable timing signals from a lower-frequency reference and, in this case, uses three phase-locked loops to produce multiple high-frequency outputs. The PLL-based approach belongs to the clock and timing IC hierarchy, where frequency synthesis supports processor clocks, communications infrastructure, storage interfaces, and other digital systems requiring controlled clock distribution. The principal feature is the combination of triple-PLL architecture, field programmability, and spread-spectrum clock generation. Bypass operation gives the design team a way to move between the synthesized and reference-clock paths, while CMOS output signaling supports integration with compatible digital logic. The 200 MHz maximum frequency makes the device suitable for clock trees operating below that limit. The ICS281 family provides up to three clock outputs, including multiple reference clocks according to the manufacturer documentation. The 1:3 ratio identifies a supported clock-generation relationship, while field programming allows configuration through the device's programming interface. These features make the ICS281PG more versatile than a fixed-frequency oscillator for systems that require programmable timing and controlled spectral spreading. Typical applications include communications equipment, network interface clock trees, high-speed digital processing systems, storage controllers, and clock-generation blocks in industrial equipment. Spread-spectrum operation can reduce narrowband emissions, making the device useful when electromagnetic compatibility is important. Designers must still verify each output's frequency, jitter, duty-cycle, and modulation limits against the target system requirements. The principal design consideration is preserving clean, low-jitter reference distribution to every PLL. Use the recommended reference and loop-filter network from the manufacturer datasheet, keep clock traces short, and provide solid return paths beneath high-speed signals. Decoupling should be placed close to supply pins, while output buffering or additional clock drivers may be needed for fanout beyond the device's intended loading. This page consolidates the documented 200 MHz frequency capability, triple-PLL architecture, programming features, package data, sourcing guidance, and practical clock-tree considerations. It also distinguishes confirmed drop-in candidates from lower-confidence engineering options so that schematic and PCB decisions can be checked before production release.

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ICS290PG - 200MHz Triple PLL Clock Synthesizer | Renesas
ICS290PG

ICS290PG - 200MHz Triple PLL Clock Synthesizer | Renesas

Renesas Electronics ICS290PG is a field-programmable, triple-PLL spread-spectrum clock synthesizer with a maximum frequency of 200 MHz, CMOS outputs, and support for clock or crystal inputs. The device generates up to eight high-quality high-frequency clock outputs, including multiple reference clocks, and is packaged in a 20-pin TSSOP package identified as PGG20. Its programmable architecture makes it suitable for systems that require controlled clock generation, frequency synthesis, or spread-spectrum operation. A clock synthesizer is an integrated circuit that derives one or more stable timing signals from a reference clock or crystal. Clock and timing ICs sit within the broader timing-control hierarchy used by processors, communications equipment, storage systems, and test instrumentation. A PLL-based synthesizer can multiply, divide, or otherwise derive clock frequencies while providing programmable output arrangements and phase-related reference signals. The ICS290PG uses three PLL sections to produce multiple related outputs from a common reference source. Its operating input types are clock or crystal, while its output logic is CMOS. The stated input-to-output ratio reaches 1:8, and the maximum generated frequency is 200 MHz. Spread-spectrum capability can help redistribute clock energy across a frequency band, which is useful where controlled spectral spreading is desirable for system timing, interface, or electromagnetic-interference considerations. The PGG20 package offers 20 pins and an operating temperature range from -40 °C to +85 °C. The device is identified as lead-free and is supplied in a tube for the cataloged ordering configuration. Pin functions, programmable register details, reference-frequency limits, output configurations, jitter characteristics, supply-voltage range, and package dimensions must be confirmed in the manufacturer datasheet before a new board layout is released. Typical clock-tree applications include processor and controller timing, communications equipment, data-converter systems, storage controllers, and instrumentation. In a communications design, the ICS290PG can create a system clock and reference outputs from one source. In processor-based equipment, it can provide programmable frequencies while reducing the number of independent oscillators and associated distribution components. The main design consideration is validating the complete clock architecture. The reference input, PLL programming values, output enable sequence, trace topology, and downstream jitter requirements must be evaluated together. Short, controlled clock routes and proper return paths help preserve signal quality, while an output-termination strategy should follow the impedance of the PCB and the receiving device. This page combines verified device characteristics, application guidance, pin and package constraints, comparison fields, and replacement guidance. It is structured to help engineers identify whether the ICS290PG meets the required frequency, output-count, logic, temperature, and package conditions before committing a PCB footprint or production BOM.

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ICS291PG - 200MHz Triple-PLL Spread-Spectrum Clock | Renesas
ICS291PG

ICS291PG - 200MHz Triple-PLL Spread-Spectrum Clock | Renesas

The Renesas Electronics ICS291PG is a triple-PLL field-programmable spread-spectrum clock synthesizer with a maximum output frequency of 200 MHz, CMOS outputs, clock or crystal input, and PLL bypass capability. It is packaged in a 20-pin TSSOP package measuring 0.173 inches, or 4.40 mm, in width. The device generates up to six high-quality, high-frequency clock outputs and includes multiple reference-clock functions for clock-tree and interface designs. A spread-spectrum clock synthesizer is a clock-generation IC that varies clock timing over a programmed range to reduce peak electromagnetic emissions. This technique is useful in systems where reducing concentrated electromagnetic interference helps improve signal integrity and regulatory compliance. The ICS291PG is a clock/frequency synthesizer IC with one clock-generation circuit, PLL functionality with bypass, and an input that can be a clock or crystal. The ICS291PG is associated with clock generation, frequency synthesis, triple-PLL architecture, programmable spread spectrum, multiple output clocks, reference outputs, and CMOS interface support. Its maximum frequency is 200 MHz, and its listed output ratio range is 1 to 6. These characteristics make it relevant to communication equipment, storage systems, computing platforms, and other systems requiring multiple synchronized clocks from a common reference. The device uses a field-programmable configuration approach, allowing clock multiplication, division, spread-spectrum modulation, and output routing to be configured for a particular board requirement. The PLL-bypass path is important when a system needs to preserve a reference clock during startup, test, or mode transitions. Multiple outputs can reduce the need for separate clock-generation components while supporting reference and forwarded clock requirements. Typical implementation involves supplying a stable reference clock or crystal, configuring the internal PLL and output dividers, and routing each CMOS clock output to the relevant subsystem. Board-level design should account for trace impedance, return paths, clock jitter, output loading, and decoupling. Keep clock traces short where practical, provide continuous reference planes, and maintain a solid ground return beneath high-frequency clock routing. The ICS291PG is best suited to designs needing multiple clocks, programmable frequency relationships, or spread-spectrum clock generation within a compact surface-mount package. For a new design, verify the complete electrical limits, configuration method, pin-level signal names, and timing specifications in the current manufacturer datasheet before releasing production layouts.

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ICS308R - 200 MHz Quad PLL VersaClock | Integrated Device Technology
ICS308R

ICS308R - 200 MHz Quad PLL VersaClock | Integrated Device Technology

The Renesas Electronics ICS308R is a serially programmable quad-PLL VersaClock synthesizer with a 250 kHz to 200 MHz output-frequency range and support for up to six simultaneous output frequencies. It is packaged in a 20-pin SSOP surface-mount package and operates from a 3 V to 3.6 V supply. A PLL clock synthesizer, also called a frequency synthesizer, generates or distributes multiple clock signals from one or more reference inputs. The ICS308R belongs to the clock-generator and timing-control hierarchy, where accurate frequency generation is used to synchronize digital processors, communications links, converters, and test equipment. The principal verified features are four PLL functions, serial programmability, on-the-fly output reprogramming, and as many as six independent output frequencies. These characteristics make the device useful when a system needs flexible clock-tree generation rather than one fixed oscillator. The 200 MHz maximum output makes it suitable for high-speed digital timing domains, while the 250 kHz lower limit supports slower control and interface clocks. The ICS308R is identified as a clock or frequency synthesizer IC with one input-side reference arrangement and multiple programmable outputs. Its frequency generation is controlled through a serial programming interface, allowing the system to adjust operating frequencies as operating modes change. The exact output count, programming levels, reference frequency, jitter, and propagation characteristics are not present in the supplied search data and should be confirmed from the manufacturer datasheet before final design release. Typical applications include communications infrastructure, networking equipment, industrial automation, test and measurement systems, embedded processors, and mixed-signal products requiring several related clock domains. The SSOP-20 package supports conventional surface-mount assembly, but its narrow pitch requires careful PCB layout and reliable land-pattern construction. When designing around the ICS308R, preserve the specified power-supply range, connect decoupling capacitors near the supply pins, and validate every programming sequence against the manufacturer timing requirements. Output frequency accuracy and clock-jitter performance depend on the reference source, loop configuration, output loading, and board implementation; these values are not stated in the supplied excerpts and are marked for verification.

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ICS308RI - 200MHz Quad-PLL Clock Synthesizer | Renesas
ICS308RI

ICS308RI - 200MHz Quad-PLL Clock Synthesizer | Renesas

The Renesas Electronics ICS308RI is a serial-programmable quad-PLL VersaClock synthesizer with an output frequency range from 250 kHz to 200 MHz. It can generate six different output frequencies simultaneously and is housed in a 20-pin SSOP package measuring 3.90 mm wide. The device combines four phase-locked loops with serial configuration, allowing a host processor to program multiple related clocks within one integrated circuit. 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.

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ICS308RT - 200MHz Quad PLL Clock Synthesizer | Renesas
ICS308RT

ICS308RT - 200MHz Quad PLL Clock Synthesizer | Renesas

Renesas Electronics ICS308RT is a serial-programmable quad-PLL VersaClock synthesizer capable of generating output frequencies from 250 kHz to 200 MHz and providing six different output frequencies simultaneously. The device combines four phase-locked loops with a serial programming interface, allowing a host controller to configure multiple clock outputs for a complex electronic system. It is positioned as a clock and timing IC within the broader clock-generator, frequency-synthesizer, PLL, and semiconductor hierarchy. 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.

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ICS309R - 200MHz Triple-PLL Clock Synthesizer | Renesas
ICS309R

ICS309R - 200MHz Triple-PLL Clock Synthesizer | Renesas

The Renesas Electronics ICS309R is a serially programmable triple-PLL spread-spectrum VersaClock synthesizer with a maximum output frequency of 200 MHz, supplied in a 20-pin SSOP package. Its verified electrical attributes include LVCMOS outputs, clock or crystal inputs, PLL bypass capability, a 1:9 input-to-output ratio, and a 3.0 V to 3.6 V supply range. A clock synthesizer generates or distributes one or more related clock signals for digital systems. This ICS309R belongs to the PLL-based clock generator hierarchy: it compares a reference clock with an internal phase-locked loop and then divides or multiplies that reference to produce programmable outputs. Spread-spectrum clocking reduces the concentration of clock energy at one frequency, while serial programming permits controlled configuration by an embedded controller. The strongest verified features of ICS309R are its triple-PLL architecture, serial programmability, spread-spectrum operation, 200 MHz maximum frequency, LVCMOS output type, and support for both clock and crystal reference sources. The bypass function can be useful when a system must pass through or test a clock source without normal PLL operation. The 20-pin surface-mount SSOP supports compact clock-generation layouts. The supplied snippets do not disclose the complete PLL configuration ranges, individual output-channel assignments, jitter specifications, serial interface levels, or output-drive details. Engineers should therefore treat ICS309R as a 200 MHz-class, 3.3 V clock synthesizer and verify every timing and signal-integrity requirement against the manufacturer datasheet before releasing a new design. Some retrieved summaries appear to mix ICS309R with the closely related ICS308, so this distinction is important. Typical uses include processor and controller clock generation, communications equipment, storage systems, test and measurement instruments, and embedded systems that require programmable frequency generation or spread-spectrum clocking. In each case, the reference clock, target output frequency, loop filter, serial programming sequence, and downstream load must be validated together. PCB implementation should preserve short, controlled-impedance clock paths and provide clean return paths beneath the device. Keep programming signals away from sensitive clock nets, observe all bypass-capacitor recommendations in the datasheet, and confirm output rise and fall times at the actual receiver. Do not infer pin function or output assignment from the family-level product description alone. This page consolidates the verified distributor and datasheet-index information available for ICS309R, separates confirmed facts from missing data, and provides replacement, selection, and design guidance that is not presented as a manufacturer datasheet replacement.

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ICS309RI - 200 MHz Triple-PLL Spread-Spectrum Clock | Renesas
ICS309RI

ICS309RI - 200 MHz Triple-PLL Spread-Spectrum Clock | Renesas

The Renesas ICS309RI is a serial-programmable triple-PLL spread-spectrum clock synthesizer with a maximum operating frequency of 200 MHz, LVCMOS outputs, and clock or crystal input support. It is packaged in a QSOP-20 package and is designed for systems that require programmable frequency generation, clock distribution, and spread-spectrum clocking. The ICS309RI includes PLL bypass functionality and supports input-to-output multiplication ratios described in the device documentation. A programmable clock synthesizer is used to generate one or more stable digital clock outputs from a reference clock or crystal. By dividing or multiplying the reference frequency through internal phase-locked loops, the circuit allows system designers to reconcile multiple clock domains and reduce clock-related electromagnetic interference. Spread-spectrum operation further changes the emitted clock frequency over time, reducing narrowband emissions and improving compatibility with sensitive downstream equipment. The ICS309RI uses serial programming to configure its clock-generation functions, allowing a host controller to set operating parameters during initialization. The presence of LVCMOS outputs makes it suitable for digital logic requiring conventional single-ended clock signaling. Its maximum frequency of 200 MHz provides ample headroom for communications, networking, storage, embedded computing, and industrial control systems that distribute clocks to processors, transceivers, and peripheral controllers. The triple-PLL architecture is useful when one reference source must support several related output frequencies. PLL bypass allows the device to pass through a clock when a direct path is appropriate, helping designers simplify control sequences and support different operating modes. The QSOP-20 package supports compact surface-mount construction while providing the pin count needed for programming, reference, and clock outputs. When designing around the ICS309RI, begin with the manufacturer pin-description and application-information sections to assign programming pins, reference inputs, and outputs correctly. Confirm the selected reference frequency, output ratio, output enable sequence, and bypass state in software before enabling downstream clocks. Keep clock traces short, provide continuous return paths, and account for output-enable timing when multiple loads must start in a defined sequence. This product page combines the device’s documented architectural features with practical guidance for clock-tree integration, programming, and EMI-conscious implementation. It is intended to help engineers distinguish the ICS309RI from ordinary fixed-frequency clock generators and to evaluate whether its programmable triple-PLL architecture matches the requirements of a new board design.

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ICS309RT - 200MHz Triple-PLL Clock Synthesizer | Renesas
ICS309RT

ICS309RT - 200MHz Triple-PLL Clock Synthesizer | Renesas

Renesas Electronics ICS309RT is a serially programmable triple-PLL spread-spectrum clock synthesizer with a maximum output frequency of 200 MHz, supplied in a 20-pin SSOP surface-mount package. The device accepts a clock or crystal input, provides LVCMOS outputs, supports PLL bypass, and can produce up to six different output frequencies simultaneously. Its specified operating supply range is 3 V to 3.6 V. A clock synthesizer is an integrated timing device that generates or distributes multiple related clock frequencies from a common reference. It belongs to the clock and timing IC hierarchy, where PLLs multiply and divide a reference frequency to establish programmable output clocks. The ICS309 combines that function with serial programming and spread-spectrum clock generation, allowing system designers to control frequency relationships and reduce clock-related electromagnetic interference without redesigning the PCB. The principal feature of ICS309RT is its triple-PLL architecture. According to the manufacturer device description, ICS309RT can generate any output frequency from 250 kHz to 200 MHz and supports up to six simultaneous output frequencies. This range permits one timing device to replace multiple separate oscillators or dividers in communications, storage, computing, and test systems. Serial programmability also simplifies configuration and supports applications where several clocks must be coordinated under software control. The ICS309RT supports both clock and crystal inputs. This allows it to operate from an externally generated reference or from a crystal oscillator arrangement when an independent frequency reference is required. Its PLL bypass feature provides a path for evaluating clock behavior without modulation, while its spread-spectrum capability is intended to spread clock energy across a frequency band and reduce peak electromagnetic emissions. LVCMOS output signaling is suitable for common digital clocking environments operating from the device's 3 V to 3.6 V supply range. Typical uses include processor and peripheral clock distribution, data-conversion clocking, communications equipment, storage controllers, networking hardware, and embedded systems that require several frequency outputs. The six-output capability is especially useful when a design needs related clocks for a controller, serial interface, memory, and data converter without allocating a separate oscillator to each load. The primary design consideration is configuration and output planning. Engineers should use the manufacturer datasheet's pin-description, register, and application tables to confirm every pin function, programming sequence, output format, and reference-clock requirement before layout. Because the clock-generation architecture includes PLL and spread-spectrum functions, signal routing, grounding, and output loading should follow the manufacturer's recommended reference layout rather than relying on general-purpose clocking assumptions. This product page consolidates the verified frequency, PLL, I/O, supply, and package characteristics into an engineering-focused reference. It also distinguishes verified device functions from parameters that still require confirmation from the complete manufacturer datasheet, helping designers plan replacements and PCB reuse without assuming unsupported compatibility.

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ICS341MP - 200MHz Spread Spectrum Clock Synth | Renesas
ICS341MP

ICS341MP - 200MHz Spread Spectrum Clock Synth | Renesas

The Renesas Electronics ICS341MP is a low-cost, single-output, field-programmable clock synthesizer with a maximum output frequency of 200 MHz and an LVCMOS output in an 8-pin SOIC package. It accepts a clock or crystal input, contains one PLL, and supports programmable output frequencies from 250 kHz to 200 MHz at a 1:1 input-to-output ratio. A field-programmable clock synthesizer is a clock-and-timing IC that generates a stable digital clock from an external reference. The ICS341 belongs to the broader PLL-based frequency synthesizer hierarchy, where the PLL multiplies or divides a reference frequency to create a programmable operating clock. Clock-and-timing ICs support digital systems requiring deterministic frequency generation, clock distribution, or reduced electromagnetic interference. The ICS341MP supports spread-spectrum clock generation to reduce system EMI by distributing clock energy over a range of frequencies. Its maximum frequency is 200 MHz, while its minimum programmable output is 250 kHz. A single LVCMOS output simplifies clock routing, and the integrated PLL allows the device to operate from a clock or crystal reference. These characteristics suit designs that need adjustable timing without a complex multi-output clock architecture. The ICS341MP is implemented in an 8-SOIC surface-mount package measuring 3.90 mm in body width. This package provides a practical upgrade over larger through-hole clock devices while remaining compatible with conventional PCB assembly. Its single-circuit architecture also keeps the signal path manageable, although applications requiring multiple independently programmable outputs would need a more capable clock generator. Typical uses include EMI-sensitive embedded systems, communications equipment, consumer electronics, and digital processing platforms where a programmable reference is useful. Spread-spectrum operation can help reduce narrowband emissions in systems that must meet internal or regulatory EMC goals. The 200 MHz ceiling supports common processor, interface, and control-clock requirements, while the 250 kHz lower limit accommodates lower-rate digital buses and control logic. Designers should verify the reference-input configuration, programmed frequency range, output enable behavior, and external crystal or clock requirements against the manufacturer datasheet before layout. Keep the reference and output paths short, provide the required decoupling capacitors close to the device, and confirm that the selected spread-spectrum range satisfies both timing margins and system EMC objectives. This page organizes the ICS341MP specifications, sourcing information, design guidance, and qualified drop-in options into one engineering-focused reference. It supports faster part selection while emphasizing the need to validate programming, reference, and EMC details against the manufacturer datasheet.

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ICS342MP - 200MHz Dual-Output Clock Synthesizer | Renesas
ICS342MP

ICS342MP - 200MHz Dual-Output Clock Synthesizer | Renesas

Renesas Electronics ICS342MP is a field-programmable, dual-output clock synthesizer with a maximum output frequency of 200 MHz, packaged in an 8-pin SOIC. The device accepts clock or crystal input and provides LVCMOS clock outputs through an integrated PLL architecture. Its specified 3.15 V to 3.45 V operating-supply range makes it suitable for low-voltage digital systems requiring locally generated, configurable timing signals. A clock synthesizer is a clock and timing IC that generates, divides, multiplies, or redistributes clock signals for digital logic. Clock generators and PLL-based synthesizers belong to the broader timing-control hierarchy that includes oscillators, clock buffers, dividers, and jitter-cleaning devices. Unlike a crystal oscillator, which primarily produces a fixed reference frequency, the ICS342MP uses programmable synthesis to produce multiple related output clocks and reduce the number of separate timing components in a system. The ICS342MP combines two configurable outputs with PLL support and a maximum frequency of 200 MHz. Its input section can operate from a clock or crystal, while its LVCMOS outputs are suited to digital logic that requires single-ended clock signals. The SOIC-8 surface-mount package also supports conventional PCB assembly and provides a compact option for communication, control, and embedded-system clock trees. Programmability allows the output frequencies to be selected through the device configuration interface instead of requiring a separate fixed-frequency oscillator for each clock domain. This can simplify board partitioning and provide a common timing reference for related circuits. The PLL architecture is useful when the system needs an output frequency derived from a common reference, although loop behavior, output jitter, and reference stability must be evaluated during clock-tree design. Typical uses include digital controller timing, industrial automation modules, embedded processor clock distribution, communications equipment, and general-purpose peripheral clocking. In these systems, two outputs can support related clock domains or distribute a master clock to two loads while keeping the design compact. The low-voltage supply requirement should be checked against the voltage and sequencing requirements of the logic being clocked. The main design consideration is preserving signal integrity between the synthesizer outputs and receiving logic. Keep clock traces short, provide a continuous ground reference, use appropriate termination when required, and observe the input and output timing limits in the manufacturer datasheet. Decoupling should be placed close to the supply pin, with the value and stability requirements taken directly from the recommended application circuit. This page consolidates the ICS342MP device identity, clock-synthesis specifications, package information, sourcing structure, and application-oriented design guidance. It also identifies the verified same-family replacement candidate and separates confirmed electrical attributes from parameters that require confirmation before schematic release or production qualification.

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ICS343MP - 200MHz Triple-Output Clock Synthesizer | Renesas
ICS343MP

ICS343MP - 200MHz Triple-Output Clock Synthesizer | Renesas

Renesas Electronics ICS343MP is a field-programmable, triple-output clock synthesizer based on the VersaClock architecture. It generates three independently programmable output clocks, reaches a maximum output frequency of 200 MHz, and accepts either a crystal or external clock input. The device is packaged in an 8-pin SOIC measuring 3.90 mm wide, making it suitable for compact communications, industrial control, test-and-measurement, and embedded timing systems. A clock synthesizer is a timing IC that accepts a reference frequency and uses one or more phase-locked loops to produce stable, independently configurable clock outputs. The ICS343 belongs to the clock generator and PLL hierarchy within the broader clock and timing IC category. Its three-output architecture can replace multiple discrete oscillators or divider networks when a board requires several related frequencies from one reference source. The ICS343MP provides three programmable outputs, PLL-based frequency synthesis, LVCMOS output signaling, and maximum frequency operation of 200 MHz. Separate output divide values from 2 through 20 allow the output clock banks to support widely different frequencies from the same reference. These features make the device useful where a system needs flexible clock partitioning without allocating a separate synthesizer for every rail. Its architecture supports low-cost field-programmable clock generation from a crystal or clock source. Independent output programming is particularly valuable in mixed-signal, communications, and data-conversion systems where the processor, serial interface, and peripheral blocks may not require the same frequency. The 8-SOIC package also offers a familiar surface-mount footprint for designs that must support external oscillators or frequency dividers. Typical applications include processor and interface clocking, communications modules, industrial automation equipment, test and measurement instrumentation, and embedded control systems. In each case, the synthesizer can centralize reference distribution while allowing output frequencies and divide ratios to be selected during configuration. The result is a smaller clock tree and potentially fewer discrete timing components. Designers should evaluate loop bandwidth, output jitter, supply requirements, and board-level noise using the manufacturer's application guidance before high-volume release. Reference-crystal layout, grounding, and output-routing practices are especially important in low-jitter systems. Because output-edge quality depends on the complete clock tree, PCB trace geometry and supply decoupling should be evaluated together with the programmed divider and PLL settings. This product page consolidates the device classification, functional characteristics, sourcing information, and engineering-oriented usage guidance. It also distinguishes the verified ICS343MP configuration from related suffix variants and identifies the limitations of the available replacement records, helping engineers make a more informed drop-in decision without treating broadly similar clock ICs as electrically interchangeable.

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ICS345RP - Triple PLL 200MHz Clock Synthesizer | Renesas
ICS345RP

ICS345RP - Triple PLL 200MHz Clock Synthesizer | Renesas

Renesas Electronics ICS345RP is a triple-PLL field-programmable clock synthesizer IC with a 200 MHz maximum clock frequency and up to nine high-quality, high-frequency clock outputs, including multiple reference clocks. The device is supplied in a 20-SSOP package with a 3.90 mm package width, making it suitable for compact embedded clock-generation designs where several independently derived clock signals are required. A field-programmable clock synthesizer is a clock and timing IC that uses one or more phase-locked loops to generate, divide, multiply, or otherwise derive multiple clock outputs from a reference source. In the broader semiconductor hierarchy, a PLL belongs to the clock and timing category and provides a flexible alternative to fitting separate oscillators and divider networks on a complex circuit board. The ICS345RP is positioned for systems that need multiple related clock domains while preserving a centralized programming and distribution architecture. The ICS345RP combines a triple-PLL architecture with field-programmable output generation. According to the Renesas datasheet result for the 345 family, the device can generate up to nine high-quality, high-frequency clock outputs and can derive those outputs from a low-frequency reference. The verified distributor listing identifies the ICS345RP as a clock/frequency synthesizer IC with a 200 MHz frequency rating and a single 20-SSOP configuration. This type of device is useful in communication equipment, industrial control systems, test and measurement instruments, embedded computing platforms, and other systems requiring multiple clocks with predictable relationships. A common design uses a stable reference source at the input and programmable divider, multiplier, and phase-alignment functions to create the required output frequencies. The central benefit is reduced component count and easier clock-tree management compared with several unrelated oscillator and divider combinations. When designing around the ICS345RP, confirm the reference frequency, target output frequencies, output-routing requirements, and permitted programming scheme against the manufacturer datasheet. The 20-SSOP footprint requires careful PCB layout, particularly around supply decoupling, clock output routing, and grounding. The package should not be replaced with a mechanically similar part unless its pinout, programming model, PLL performance, and output-routing behavior have been verified. This page summarizes the verified device identity, package, frequency, PLL, and output-count information while highlighting the practical clock-tree role of the ICS345RP. Detailed electrical limits, pin assignments, programming registers, and application-specific replacement decisions should be confirmed in the Renesas ICS345 documentation before schematic sign-off or PCB release.

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ICS348RP - 200MHz Quad-PLL Clock Synthesizer | Renesas
ICS348RP

ICS348RP - 200MHz Quad-PLL Clock Synthesizer | Renesas

The Renesas ICS348RP is a quad-PLL field-programmable VersaClock synthesizer that generates up to nine high-quality, high-frequency clock outputs from a crystal or external clock input. Its maximum clock frequency is 200 MHz, and the device provides LVCMOS clock outputs in a 20-pin QSOP/SSOP package. The ICS348RP belongs to the clock generator and frequency synthesizer family, combining phase-locked-loop frequency multiplication with programmable output generation. A clock generator is an integrated circuit that creates one or more timing references from a stable source. A frequency synthesizer extends this function by multiplying, dividing, or otherwise transforming a reference frequency. The ICS348RP places four PLLs and multiple output stages in one timing IC, allowing a system to distribute related reference and working clocks while avoiding a collection of separate oscillator and divider circuits. The ICS348RP supports a crystal or clock input, includes PLL bypass capability, and can produce as many as nine clock outputs. These characteristics make it useful where a board needs several coordinated frequencies for processors, memory, serial links, converters, or data-conversion equipment. Because the device is field programmable, system designers can configure output behavior rather than relying only on fixed factory frequencies. Its quad-PLL architecture provides the central mechanism for deriving multiple clock outputs from a common low-frequency reference. Maintaining a shared reference can simplify synchronization across subsystems and reduce the number of separate frequency-generation components. The bypass path is important during development because it provides a way to evaluate clock-source conditions without relying on every PLL operating at once. Typical applications include communications equipment, test and measurement instruments, industrial control systems, data-acquisition modules, and embedded computing platforms. The device is especially relevant when a design needs several related high-frequency outputs but has limited board space or wants to centralize clock generation in one programmable component. Layout should preserve short, controlled clock paths and place support components near their associated pins. Differential and high-speed routing requires careful return-path planning, while power and ground distribution should remain stable across the clock-generation domain. Designers should verify output frequency, jitter, phase relationship, and bypass behavior against the final system timing budget. This product page organizes the key clock-synthesis facts, package information, practical use cases, and engineering guidance for ICS348RP. It also highlights the distinction between electrical substitutes and package-only order-code variants so procurement and design teams can evaluate compatibility correctly before making an engineering change.

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ICS409M - 80MHz PC Peripheral Clock | Renesas Electronics
ICS409M

ICS409M - 80MHz PC Peripheral Clock | Renesas Electronics

The Renesas Electronics ICS409M is a PC peripheral clock synthesizer with PLL capability, crystal input, LVCMOS output, and a maximum frequency of 80 MHz. It is packaged in an 8-pin SOIC and is designed to reduce external component count in PC peripheral clocking systems. The supported output ratio is 1:3, while one synthesizer circuit provides a compact clock-generation solution for compatible legacy PC applications. A clock synthesizer is a clock and timing integrated circuit that derives one or more stable output signals from a reference source. Within the hierarchy of oscillator, phase-locked loop, clock generator, timing IC, and semiconductor, the ICS409M uses an on-chip crystal oscillator and PLL to support PC peripheral clock requirements. This category is important when a system needs a defined frequency that differs from the original crystal reference. Key verified features include PLL support, crystal input, LVCMOS output, one clock circuit, a 1:3 input-to-output ratio, and operation up to 80 MHz. The 8-pin SOIC package supports conventional surface-mount PCB assembly. Its integration can reduce the number of discrete oscillator and divider components required around a PC peripheral interface. The verified source material describes the ICS409M as a cost-effective clock synthesizer optimized for PC peripheral applications. The device accepts a common 14.31818 MHz crystal through its on-chip crystal oscillator and uses the PLL to establish the required output relationship. This reference arrangement is relevant to legacy PC interfaces whose clock trees were designed around the widely used 14.31818 MHz frequency. The LVCMOS output is suitable for digital clock distribution when voltage levels, timing margins, and load requirements are confirmed in the original system design. Typical uses include PC peripheral timing, interface clock generation, frequency multiplication, and replacement of discrete crystal-oscillator and divider networks. Because the available verified data does not provide complete electrical limits or timing tables, engineers should consult the manufacturer datasheet and system clock requirements before release to production. The primary design consideration is compatibility. Confirm the crystal frequency, target output frequency, output duty cycle, supply voltage, load capacitance, and PCB footprint before substitution. A nominal 80 MHz maximum rating does not establish that every downstream timing requirement is met; system-level rise-time, jitter, and setup-and-hold margins remain decisive. This page consolidates verified distributor and technical-source information, package and frequency details, sourcing links, and practical replacement guidance that is not presented as a single consolidated manufacturer datasheet.

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ICS409MT - 80MHz PC Peripheral Clock | Renesas Electronics
ICS409MT

ICS409MT - 80MHz PC Peripheral Clock | Renesas Electronics

Renesas Electronics ICS409MT is a clock and frequency synthesizer designed for PC peripheral applications. It uses an on-chip crystal oscillator with a 14.31818 MHz crystal input, provides one LVCMOS clock output, and supports output frequencies up to 80 MHz. The device is packaged in an 8-pin SOIC and operates across the 0°C to 70°C temperature range. Its 1:3 input-to-output ratio makes it suitable for systems that derive a higher-frequency operating clock from the common 14.31818 MHz reference used in PC architectures. A clock synthesizer is a timing IC that generates or distributes clock signals needed by digital logic. Clock generators and phase-locked loops sit within the clock and timing IC category, where they support processors, memory interfaces, communications equipment, and computer peripherals. By multiplying a stable reference frequency, the ICS409MT reduces the number of separate oscillators and distribution components required in a system while providing a defined LVCMOS interface for downstream circuitry. The principal features of the ICS409MT are its 80 MHz maximum output frequency, single LVCMOS output, single PLL, crystal input, and 1:3 input-to-output ratio. The 14.31818 MHz reference arrangement supports designs based on the traditional PC timing domain, while the on-chip oscillator eliminates the need for an external oscillator module. The 8-SOIC surface-mount package also supports compact, automated PCB assembly compared with larger through-hole clock packages. Technically, the ICS409MT is identified as a PLL-based clock and frequency synthesizer with one clock circuit. The oscillator and PLL establish the output timing relationship between the crystal reference and the LVCMOS clock output. The listed 1:3 ratio indicates that the output clock is three times the reference frequency, producing 42.95454 MHz when operated with a 14.31818 MHz crystal. Input and output polarity, PLL loop bandwidth, jitter, output duty-cycle limits, and detailed electrical timing values require confirmation from the manufacturer datasheet before final timing-budget work. Typical applications include PC peripheral clock generation, legacy computer interface cards, embedded systems that use a 14.31818 MHz reference, communication equipment, and digital subsystems requiring a locally generated LVCMOS clock. In these systems, the device can centralize clock multiplication and reduce oscillator-component count. Its 80 MHz ceiling provides useful headroom when the intended peripheral clock is 42.95454 MHz, while the single-output architecture suits designs that need one derived clock rather than several independently managed clocks. The primary design consideration is crystal and layout stability. Place the crystal, load capacitors, and ground path close to the device, and route high-current clock output away from sensitive analog and communication signals. Validate the resulting clock against the system’s frequency tolerance, jitter, rise-time, duty-cycle, and load requirements. Because the documented operating range is 0°C to 70°C, the part should not be assumed suitable for industrial temperature environments without additional qualification. This product record combines the device architecture, package information, operating limits, search-oriented technical questions, application guidance, and engineering-selection context. It also clearly separates confirmed characteristics from parameters that require datasheet confirmation, helping designers evaluate ICS409MT before committing it to a PC peripheral, legacy computing, or embedded clock-generation design.

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