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DS3231MZ/V+ - 5ppm I2C RTC in 8-SOIC | Analog Devices
The Analog Devices DS3231MZ/V+ is a temperature-compensated real-time clock and calendar with ±5 ppm accuracy, a 2.3 V to 5.5 V supply range, and a 400 kHz I2C interface, housed in an 8-pin SOIC package. It combines a microelectromechanical systems resonator with a crystal oscillator to maintain accurate timekeeping when the main supply is interrupted through its battery input. A real-time clock, or RTC, is a timing IC that preserves calendar and clock information independently of a system processor. In the product hierarchy, an RTC belongs to clock and timing ICs, then integrated circuits, and ultimately semiconductor devices. Unlike a simple counter driven by an external crystal, the DS3231MZ/V+ integrates the resonant timing element, oscillator circuitry, calendar logic, and battery-backed timekeeping into one 8-pin device. Key features include ±5 ppm clock accuracy, temperature compensation, 2.3 V to 5.5 V operation, and an I2C-compatible two-wire serial interface rated for 400 kHz. The device supports continued operation from a coin-cell battery when the primary supply is unavailable, making it useful for wall-clock timestamps, event logging, and systems that must preserve time across resets or power interruptions. Its SOIC-8 surface-mount package also supports conventional PCB assembly and automated production. The DS3231M family uses integrated microelectromechanical systems technology with a temperature-compensated MEMS resonator, providing accurate timekeeping without relying on an external discrete crystal. The DS3231MZ/V+ is identified by the verified distributor data as an 8-SOIC, 0.154-inch, 3.90 mm-wide I2C real-time clock. Its two-wire interface allows a host microcontroller or processor to read and write calendar and clock registers while minimizing connection count. Typical uses include industrial control systems, environmental monitoring, data acquisition equipment, consumer appliances, embedded instruments, and network-connected IoT equipment. In each case, the device can maintain a consistent calendar reference while the main supply is cycling or the embedded controller is being reset. Its 5 ppm rating is particularly useful when timestamp accuracy matters more than the lower cost of a basic oscillator-only RTC. Designers should provide a stable decoupling path between VCC and ground, confirm the pull-up requirements of the I2C bus, and ensure that the backup cell is installed with the correct polarity. Software must also account for the device's register structure and square-root-of-10 frequency register rather than treating it as a generic wall-clock component. Because the exact public pin names were not included in the supplied verified data, the pinout is reported as unavailable rather than reconstructed from memory. This page combines verified manufacturer and distributor information, RoHS status, supply details, structured drop-in comparison candidates, pricing evidence, and practical implementation guidance. It is designed to help engineers evaluate the DS3231MZ/V+ for battery-backed timekeeping while separating verified facts from parameters that still require confirmation from the complete manufacturer datasheet.
DS3231MZ/V+T - 5ppm I2C RTC | Maxim Integrated | 8-SOIC
The Maxim Integrated DS3231MZ/V+T is a ±5 ppm, temperature-compensated I2C real-time clock and calendar in an 8-pin SOIC package. The device supports fast 400 kHz I2C communication and includes a battery input so that timekeeping can continue when the main supply is interrupted. Its integrated MEMS oscillator is intended to provide accurate calendar time with a compact, low-power RTC implementation. The DS3231MZ/V+T is suitable for embedded systems, industrial controllers, consumer electronics, and connected products that require date, time, and calendar information. A real-time clock is a clock-and-calendar IC that tracks elapsed time independently of a host microcontroller. RTCs belong to the timing and clock IC category and provide timekeeping across resets, power interruptions, and low-power operating states. The DS3231MZ/V+T combines an I2C interface with a battery-backed timekeeping architecture, allowing a system to read current time through a two-wire serial bus while retaining calendar data during main-power loss. Key features include ±5 ppm timing accuracy, temperature compensation, 400 kHz fast-mode I2C operation, an integrated battery input, and an 8-SOIC package with a 3.90 mm body width. The temperature-compensated MEMS architecture is intended to reduce sensitivity to ambient temperature changes compared with basic crystal-based RTC implementations. The I2C interface simplifies connection to microcontrollers, embedded processors, and industrial controller boards. The DS3231MZ/V+T is designed for applications where wall-clock time is more useful than a simple counter. It can preserve timekeeping during short or extended power interruptions when a suitable backup battery is installed, allowing firmware to recover a valid date and time after restart. The 8-SOIC package also supports conventional surface-mount assembly and integration into compact embedded boards. Typical uses include industrial control systems, access-control terminals, data loggers, environmental monitoring equipment, consumer appliances, and embedded IoT controllers. In these systems, the RTC can provide timestamps for sensor records and event logs even when the main processor resets. Design engineers should verify the battery type, backup-current budget, supply sequencing, pull-up resistors, and operating-temperature requirements for the specific system. This page consolidates verified distributor listings, manufacturer product information, package details, and practical selection considerations for engineers evaluating the DS3231MZ/V+T. The available distributor price is listed as of 2026-10-29, while electrical values not explicitly shown in the supplied source data are marked for data completion rather than guessed.
DS3231S# - Accurate I2C RTC with TCXO | Analog Devices
The Analog Devices DS3231S# is a highly accurate I2C real-time clock with an integrated temperature-compensated crystal oscillator, crystal, and battery backup, supplied in a 16-SOIC package. It operates from 2.3 V to 5.5 V and maintains timekeeping when the main supply is interrupted. The integrated TCXO and crystal provide accurate timekeeping without requiring an external crystal and load-capacitor design. A real-time clock is a clock-and-calendar integrated circuit that retains date and time information while a system is unpowered. The RTC belongs to the timekeeping and clock-and-timing hierarchy within semiconductor electronics. Unlike a general-purpose microcontroller timer, the DS3231S# is designed to maintain calendar information, provide a programmable square-wave output, and interface through a two-wire I2C bus. The DS3231S# combines a battery-backed RTC, an integrated temperature-compensated crystal oscillator, and an integrated crystal in one package. Its operating-voltage range of 2.3 V to 5.5 V supports both 3.3 V and 5 V systems. The two-wire interface reduces the number of host-controller connections required for timekeeping, while the integrated backup-battery path allows continued operation during a main-power loss. According to the Analog Devices manufacturer product page, the device is a low-cost, extremely accurate I2C real-time clock with an integrated TCXO and crystal. This integration supports compact designs for industrial controllers, embedded products, data-acquisition equipment, and consumer electronics. The device also provides a 32.768 kHz square-wave output according to the manufacturer datasheet, allowing it to serve as a timebase or clock source for additional system functions. DS3231S# is appropriate when calendar accuracy, backup timekeeping, and a compact integrated crystal matter more than implementing a software-disciplined oscillator. Designers should provide the required decoupling and maintain suitable routing around the integrated crystal and TCXO. Because the verified source material does not provide a complete pin-by-pin mapping or numeric accuracy and temperature-drift tables, those details should be confirmed in the manufacturer datasheet before schematic release. This page combines verified manufacturer and distributor information, structured technical guidance, and a comparison framework for engineers evaluating the DS3231S#. It does not infer missing electrical limits, lifecycle claims, or alternative-device specifications that are absent from the supplied source data.
DS3231SN# - I2C RTC with TCXO | Maxim Integrated
The Analog Devices Inc./Maxim Integrated DS3231SN# is an extremely accurate I2C real-time clock and calendar with an integrated temperature-compensated crystal oscillator (TCXO) and crystal, supplied in a 16-pin SOIC package. The verified source identifies a 2.3 V to 5.5 V supply range, a 32.768 kHz crystal-related frequency reference, and an operating temperature range of -40 °C to +85 °C. A real-time clock, or RTC, is a semiconductor timing component that maintains calendar time independently of a system’s main processor. The DS3231SN# combines the RTC function with an integrated TCXO and crystal, reducing external timing-component count and helping maintain accurate timekeeping across changing temperatures. In a power-management hierarchy, it is an IC oscillator and timekeeping device rather than a power regulator or communications transceiver. The principal verified features are the integrated TCXO and crystal, I2C clock/calendar access, 2-wire serial communication, wide 2.3 V to 5.5 V supply operation, and 16-SOIC packaging. These characteristics suit systems that need seconds, minutes, hours, calendar date, and periodic time events without relying on an external crystal. The integrated TCXO is particularly relevant when maintaining timing accuracy under ambient-temperature variation is more important than using a simple uncorrected crystal oscillator. The DS3231SN# is designed for embedded control, embedded data logging, portable instrumentation, consumer electronics, industrial control, and access-control equipment. In these applications, the host controller reads or writes the RTC through I2C and can use time stamps for event sequencing, display synchronization, scheduled operations, or data-retention workflows. Because the verified distributor description identifies it as an I2C RTC/TCXO device, the design should include appropriate pull-up resistors and confirm the host’s I2C logic levels. When selecting the device, verify the complete pinout and electrical limits in the manufacturer datasheet before layout release. Keep the I2C traces short, provide the required decoupling, and confirm the exact SOIC footprint and pin numbering against the PCB library. The supplied web data does not provide verified pricing tiers, detailed timing accuracy, battery-current values, alarm specifications, or absolute maximum ratings, so those values should be obtained from the manufacturer datasheet. This page combines verified distributor information, the identified DS3231 family functionality, practical integration guidance, and explicit data gaps. It does not invent specifications that were absent from the supplied search results.
DS3231SN#T&R - I2C RTC with TCXO | Analog Devices
The Analog Devices DS3231SN#T&R is an I2C real-time clock and calendar with an integrated temperature-compensated crystal oscillator, crystal, and battery backup, operating from 2.3 V to 5.5 V in a 16-pin SOIC package measuring 7.50 mm wide. Its nominal crystal frequency is 0.0320 MHz, and the specified operating-temperature range is -40 °C to +85 °C. The integrated TCXO architecture maintains timekeeping accuracy across temperature changes while preserving a compact solution for systems that require calendar data, alarm handling, and battery-backed time retention. A real-time clock, or RTC, is a clock-and-timing IC that keeps track of seconds, minutes, hours, date, and calendar information independently of a system processor. Within the product hierarchy, an RTC is a timing IC, a semiconductor, and a system-support component. Unlike a basic crystal oscillator, an RTC combines a stable time reference with registers, an I2C control interface, calendar logic, and often backup-power support. This makes it suitable for preserving timestamps when the main supply is interrupted. The DS3231SN#T&R integrates a crystal resonator and temperature-compensated oscillator rather than requiring a discrete crystal and load network. It supports two-wire I2C communication, allowing a host microcontroller to read and program calendar and alarm registers. The available package data identifies a 16-pin, 7.50 mm-wide SOIC surface-mount configuration, while the -40 °C to +85 °C range supports industrial temperature requirements. Battery input allows timekeeping to continue when the primary supply is removed. The internal oscillator is compensated to reduce frequency variation caused by ambient temperature changes. This improves long-term timekeeping consistency compared with an uncompensated crystal oscillator, particularly in applications where the RTC must retain accurate timestamps during intermittent power loss. The 2.3 V to 5.5 V operating range also supports both 3.3 V and 5 V system rails. Exact initial time accuracy, current consumption, alarm resolution, and electrical timing limits are not included in the supplied excerpts and require confirmation from the manufacturer datasheet. Typical uses include industrial control systems, data loggers, metering equipment, network appliances, medical instruments, and embedded products that need a timestamp or calendar across power interruptions. A host processor can initialize the clock once, periodically retrieve time over I2C, and use the RTC as a trusted time source after restart. The integrated oscillator also reduces board area compared with a discrete crystal plus oscillator implementation. The primary design consideration is preserving correct battery-backed operation and power sequencing. The PCB must provide the specified supply and grounding connections, clean I2C routing, and suitable decoupling close to the device. Software should verify time validity after every power restoration instead of assuming that the backup source retained a valid timestamp. Exact capacitor, pull-up, and decoupling recommendations should be taken directly from the manufacturer datasheet. This page consolidates the verified manufacturer and distributor information for the DS3231SN#T&R, combines pricing available as of 2026-10-29 with package and operating-range details, and provides same-package alternatives plus engineering guidance that helps distinguish a true drop-in replacement from merely similar RTC products.
DSA504RT - Rad-Tolerant 6-Output Clock Generator | Microchip
The Microchip Technology DSA504RT is a radiation-tolerant, low-power, low-jitter six-output programmable clock generator engineered for aerospace and defense applications including spacecraft timing subsystems. It integrates a high-performance fractional-divide Analog Phase-Locked Loop (APLL), two downstream fractional dividers with spread-spectrum capability, two integer dividers, and a configurable cross-point switch that routes any synthesized frequency to any of six outputs. A clock generator (also called a programmable oscillator or frequency synthesizer) is a single-IC timing block that replaces a discrete reference, PLL, divider tree and fanout buffer chain, locking an internal low-jitter VCO/PLL to an external differential or single-ended reference and producing multiple phase-aligned output frequencies from one master source. In the hierarchy of timing components, a clock generator sits between a fixed-frequency crystal oscillator and a full frequency synthesizer, sharing the ASIC integration and configurability of the latter while retaining the deterministic low-jitter behavior of the former. Programmable clock generators are widely used in aerospace, defense, networking, PCIe, and storage systems where multiple precise reference frequencies must be derived from a single hardware reference. Key features of the DSA504RT include jitter performance as low as 200 femtoseconds (12 kHz to 20 MHz integration band), an output frequency range from 0.35 MHz to 662 MHz, support for up to 12 CMOS outputs or 6 differential outputs, PCIe Gen 1 through Gen 7 compliance, and per-output spread-spectrum control. The device accepts an external differential or single-ended reference and uses an I2C/SPI-compatible serial interface for in-orbit reprogramming of output frequencies, divider ratios, and APLL parameters. Two package options are available: a hermetic ceramic CQFP-32 for long-duration deep-space missions and a plastic QFN-28 for less demanding aerospace or ground-based defense applications; the same internal silicon works in both, so a design validated in one package can migrate to the other without reworking the schematic. Typical applications include spacecraft payload data-handling timing, satellite communication payloads, radar and electronic-warfare reference generation, rad-tolerant FPGA reference rails, and PCIe clocking in space-grade single-board computers. Its rad-tolerant process and reprogrammability via I2C/SPI enable in-orbit frequency updates after launch, a critical advantage for missions whose channel plans change after deployment. When designing with the DSA504RT, provide a low-noise reference clock and follow Microchip's recommended PCB layout for the APLL loop filter; misrouted power or reference traces will dominate the jitter budget and defeat the 200 fs performance target. This page synthesizes distributor inventory, same-brand and cross-brand drop-in alternatives, application notes, and design considerations not consolidated on any single manufacturer page.
DSC557-0343FI0 - 100MHz PCIe MEMS Clock Generator | Microchip
The Microchip DSC557-0343FI0 is a crystal-less, single-output PCI Express clock generator that delivers a 100 MHz differential HCSL/LVDS output clock from proven silicon MEMS technology, housed in a 14-pin QFN (2.5 mm × 3.2 mm) package. It is qualified to meet PCIe Gen1, Gen2, Gen3, and Gen4 specifications with 100 ppm total stability over the -40 °C to +85 °C industrial temperature range, and it operates from a 2.25 V to 3.6 V supply. What is a MEMS PCIe clock generator? A clock generator is a timing IC that produces one or more reference frequencies used to synchronize downstream logic such as CPU cores, PHYs, switches, and SerDes lanes. A MEMS (Micro-Electro-Mechanical Systems) clock generator replaces the traditional quartz crystal resonator with a silicon mechanical resonator built on standard CMOS processes, eliminating crystal aging, mechanical shock sensitivity, and the long lead times associated with quartz sourcing. In the PCIe ecosystem, a 100 MHz reference clock with stringent jitter and stability is required to drive PCIe PHYs in endpoints, root complexes, switches, and retimers. Key features include a 100 ppm total frequency stability across temperature, low additive PCIe-compliant jitter, an Output Enable (OE) pin for power sequencing, HCSL or LVDS compatible differential outputs with a 52 % typical duty cycle, and supply voltage tolerance suitable for 3.3 V rails common in server, storage, and embedded designs. The 14-pin QFN package is 77 % smaller than the equivalent 16-pin TSSOP option, simplifying layout in space-constrained boards. Architecturally, the device combines an on-chip MEMS resonator with a fractional-N PLL and an HCSL/LVDS driver. Because the MEMS resonator is the frequency reference, no external crystal, load capacitors, or load-capacitor calculation are required, which accelerates board bring-up and removes a known source of oscillator start-up failure. Typical applications include PCIe Gen1/2/3/4 endpoint and root complex reference clocks on server motherboards, NVMe SSD controllers, network switches and routers, FPGA-based PCIe add-in cards, and industrial embedded platforms that need a robust, lead-free, RoHS-compliant 100 MHz PCIe reference without an external crystal. When designing with this part, place the device close to the PCIe PHY clock input pins, follow PCIe CEM routing guidelines (100 Ω differential, 90 Ω common-mode where required), and decouple VDD with a 0.1 µF ceramic capacitor placed within 2 mm of the supply pin. Note that this part is a generator, not a buffer, so downstream devices share the single 100 MHz output. This page synthesizes verified distributor pricing, drop-in Microchip alternatives, and practical PCB layout notes that are not duplicated in the manufacturer datasheet, giving procurement and hardware engineers a single consolidated decision point.
HCF4046M013TR - Micropower PLL, 1.4MHz, SOIC-16 | STMicroelectronics
The STMicroelectronics HCF4046M013TR is a Micropower Phase-Locked Loop (PLL) IC operating at up to 1.4 MHz, housed in a 16-pin SOIC (0.154", 3.90mm width) package. It features quiescent current specified to 20V, very low power consumption of 70 µW (typ.) at VCO = 5V, and operating frequency range to 1.4 MHz (typ.) at VDD = 10V. The device also includes low frequency drift of 0.04%/°C (typ.) at VDD = 10V and a choice of two phase comparators: an exclusive-OR (XOR) detector and an edge-triggered sequential phase detector with charge pump output. A Phase-Locked Loop (PLL) is a closed-loop feedback system that generates an output signal whose phase is locked to the phase of an input reference signal. PLLs are widely used for frequency synthesis, modulation/demodulation, clock recovery, and tone decoding in analog and mixed-signal systems. As a member of the CMOS 4000-series logic family, the HCF4046 sits within the broader hierarchy of clock and timing integrated circuits (ICs), which also include phase-locked loops, frequency synthesizers, and clock generators. The 4046 architecture in particular is the industry-standard micropower PLL, with variants offered by multiple manufacturers. Key features of the HCF4046M013TR include a wide supply voltage range of 3V to 20V, very low quiescent current well-suited for battery-powered designs, two selectable phase comparators (Phase Comparator I for low-noise locking without dead zone, Phase Comparator II for high-noise rejection with a charge-pump output capable of driving low-pass filters), an on-chip linear VCO with external R/C tuning, and source-follower output buffer. The combination of low power, wide supply range, and dual phase comparators makes the device uniquely flexible among monolithic PLL ICs. The HCF4046 employs a CMOS architecture with an internal VCO whose gain is set by external resistor R1 and capacitor C1, and whose frequency offset is set by external R2 and C2. Phase Comparator I is an exclusive-OR gate offering low harmonic content in the locked condition but requiring 90° phase offset at the VCO input. Phase Comparator II is an edge-triggered sequential network that locks at zero phase error, allowing the loop to operate with arbitrary input duty cycles and providing a charge-pump output for direct connection to an external low-pass filter. The micropower CMOS design keeps dynamic supply current low even at maximum VCO frequency. Typical applications include FM demodulation and modulation, frequency synthesis, tone decoding, FSK (Frequency-Shift Keying) modems, motor speed control, and clock recovery from NRZ data. The wide supply range (3V to 20V) allows the device to operate directly from battery stacks, 5V logic rails, and ±15V analog supply rails with a single part number. When designing with the HCF4046M013TR, pay close attention to the loop-filter component selection, as it directly determines loop bandwidth, capture range, and lock time. Phase Comparator I requires 50% duty cycle signals for proper operation, whereas Phase Comparator II can handle any duty cycle. Bypass VDD with a 0.1 µF ceramic capacitor placed close to the IC pins to ensure clean supply rails. This page consolidates distributor pricing, verified pin-compatible drop-in alternatives, and practical loop-filter design guidance drawn from multiple sources rather than from the manufacturer datasheet alone.
HMC704LP4E - 8 GHz 19-Bit Fractional-N PLL | Analog Devices
The Analog Devices HMC704LP4E is an 8 GHz, 19-bit fractional-N phase-locked loop frequency synthesizer with one output, supplied in a 24-pin VFQFN exposed-pad package. It uses a silicon-germanium BiCMOS process and combines a low-noise digital phase detector, VCO, divider, reference divider, and precision controlled charge pump. According to the manufacturer product page, the HMC704 family is designed for very low phase noise and spurious content. The manufacturer datasheet states that reference spurious levels can typically be below -100 dBc when used with a well-designed board layout. A fractional-N PLL is a frequency synthesizer that uses a controllable divider ratio to synthesize a precise output frequency from a stable reference. In the signal-chain hierarchy, this PLL belongs to clock generation and timing, then to frequency synthesis, and finally to the broader semiconductor and RF signal-control categories. Its programmable synthesis capability is useful when a system needs a local clock, modulation capability, or flexible frequency relationship between a reference source and downstream circuitry. The HMC704LP4E combines an 8 GHz synthesizer identity with a 19-bit fractional-N control word. The verified distributor listing identifies it as an integer-N/fractional-N clock-generation IC with a 24-VFQFN exposed-pad package. Its ultra-low-spurious design target makes it relevant to RF, communications, test-and-measurement, and other systems where phase noise, reference spurs, or frequency flexibility affect signal integrity. The exact reference frequency, output-frequency range, divider limits, supply currents, temperature range, and package dimensions are not included in the supplied verified text and require confirmation from the complete manufacturer datasheet. The silicon-germanium BiCMOS implementation supports the device’s combined high-frequency and low-noise synthesizer architecture. The integrated phase detector, charge pump, VCO, and divider functions reduce the number of external frequency-generation blocks while preserving programmable loop behavior. External loop-filter components and a stable reference supply remain essential design considerations because they determine loop bandwidth, phase noise, reference-spur performance, and settling behavior. Typical applications include RF transceiver clock generation, communication equipment, frequency-conversion systems, instrumentation, and test equipment. In an RF system, the synthesizer can generate a relationship between the local reference and a required channel or conversion frequency. In instrumentation, programmable frequency generation provides flexibility when the exact output frequency is selected by the host or test sequence. The most important layout consideration is preserving the low-spurious performance claimed by the manufacturer. Keep the reference and sensitive synthesizer paths short, use a stable low-noise supply, provide suitable decoupling, and follow the manufacturer’s recommended reference and loop-filter implementation. The HMC860LP3E is identified in the verified datasheet snippet as a recommended low-noise, high-PSRR regulator for minimizing external spurious sources. This page combines the verified HMC704 identity, package, synthesizer description, lifecycle indication, reference-spurious claim, and source links with clearly marked engineering data gaps. It also distinguishes verified facts from parameters that must be checked in the full datasheet before a new PCB or production design is released.
ICS1523M - 250MHz Video Clock Synthesizer | Renesas | SOIC-24
Renesas Electronics ICS1523M is a 250 MHz clock synthesizer and frequency generator designed for general-purpose phase-controlled clock synthesis, line-locked and genlocked high-resolution video systems, and video projection equipment. The device is supplied in a 24-pin SOIC package measuring 0.295 inch, or 7.50 mm, in width. Its architecture uses advanced low-voltage CMOS mixed-mode technology to combine programmable frequency generation with phase-controlled operation. A clock synthesizer, also called a clock generator or phase-locked-loop-based timing device, produces one or more timing signals whose frequency and phase are controlled relative to an external reference. In a phase-locked system, the internal output remains synchronized to the reference while the feedback network determines the desired relationship. This category belongs to the Clock & Timing hierarchy, which includes clock generators, frequency synthesizers, phase-locked loops, clock buffers, and timing controllers used to coordinate digital and video systems. The principal documented feature of the ICS1523M is its 250 MHz operating frequency. Its phase-controlled frequency-generation capability makes it suitable where a system requires adjustable or externally synchronized clocks rather than a fixed-frequency oscillator. The manufacturer describes the ICS1523 family as a low-cost, high-performance solution for general-purpose clock synthesis, line-locked and genlocked high-resolution video applications, and projectors. The mixed-signal nature of the design is important in video timing systems. A reference signal establishes the synchronization point, while phase control permits the generated clock to be adjusted relative to that reference. This supports timing alignment across multiple video-processing stages and reduces reliance on multiple independent free-running clocks. Exact voltage, current, jitter, temperature, and programming-interface details were not included in the supplied source data and must be confirmed in the manufacturer datasheet before design release. ICS1523M applications include professional video timing systems, video projectors, line-locked display equipment, genlocked production systems, and general-purpose phase-controlled clock modules. In these systems, the ICS1523M can provide a coordinated timing reference for converters, processors, memory interfaces, or other circuitry requiring a stable phase-related clock. A key implementation consideration is to preserve the manufacturer's recommended reference, feedback, decoupling, and output-routing topology. Incorrect feedback connections or an unsuitable reference source can prevent phase lock or impair jitter performance. Because the verified source material does not expose complete pin assignments or electrical tables, engineers should use the official datasheet for pin connectivity, loop-filter selection, operating limits, and layout requirements. This product summary combines the verified 250 MHz, 24-SOIC package, application positioning, pricing availability, and replacement analysis with practical design guidance. It also distinguishes documented facts from parameters that still require datasheet confirmation, helping engineers evaluate the ICS1523M without treating unspecified values as guaranteed specifications.
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.
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.
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.
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.
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.
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.
ICS411M - PC Peripheral Clock | IDT | SOIC-8
The Integrated Device Technology ICS411M is a cost-effective PC peripheral clock synthesizer in an 8-SOIC package. The verified product data identifies it specifically for PC motherboard and peripheral applications, but does not provide a manufacturer-hosted technical datasheet. The component is therefore best characterized by its stated clock-generator role, legacy origin, package format, and reported distributor inventory rather than unsupported frequency, voltage, or timing claims. It belongs to the clock and timing IC hierarchy, where oscillators and clock synthesizers distribute timing signals used to coordinate digital logic. Its purpose in a personal computer was to support multiple peripheral buses or subsystem clocks while reducing the number of separate clock components required on the motherboard. An integrated clock synthesizer combines oscillator circuitry, frequency generation or distribution, and output-driver functions into one timing IC. Such devices help maintain defined relationships between digital signals. In computer systems, those relationships determine when processors, buses, storage controllers, and peripherals may exchange data. The ICS411M is described as a PC peripheral clock and is intended to optimize component count in PC motherboard and peripheral designs. Its 8-SOIC package provides a compact, surface-mount form suitable for legacy motherboard assembly, although physical dimensions and pin functions require confirmation from an authentic technical datasheet. The available evidence establishes three important procurement facts: ICS411M was originally associated with IDT, Integrated Device Technology Inc; it is packaged as 8-SOIC, listed with a nominal width of 3.90 mm; and distributor listings report inventory. However, the verified data does not state operating voltage, output count, supported clock frequencies, frequency tolerance, jitter, operating temperature, or pin assignments. Those values must not be inferred from similarly named clock ICs. This limitation is especially important because clock generators with the same package can differ substantially in pinout and output behavior. ICS411M is relevant when researching or maintaining older PC peripheral platforms rather than designing a new clock subsystem from first principles. Verified distributor listings include references to octopart clock buffers and drivers, but these search results do not establish a technical replacement or lifecycle recommendation. Before substitution, an engineer should compare the authentic ICS411M pinout, supply voltage, output waveform, frequency plan, enable logic, and timing margins. Octopart and the listed distributors can assist with sourcing, but manufacturer documentation remains the controlling source for design decisions. A typical legacy motherboard application would place the ICS411M among the system timing circuitry and route its outputs according to the original platform schematics. Because exact output assignments are unavailable in the verified data, PCB reuse cannot be approved from the package alone. Clock routing should remain short, reference planes should return cleanly, and unused outputs require the treatment specified by the original platform design. Modern replacements should not be assumed to be pin compatible. The key engineering caution is documentation completeness. Verify the original manufacturer or archived manufacturer datasheet before energizing, probing, or substituting ICS411M in powered equipment. Confirm device markings, supply rails, oscillator connections, and every package pin. This page deliberately distinguishes verified product identity from unverified technical assumptions and provides sourcing links, practical assessment guidance, and transparent data gaps for repair, maintenance, and legacy-system evaluation.
ICS501G - 160MHz PLL Clock Generator | Renesas | Timing
The Renesas Electronics ICS501G is a single-circuit PLL clock generator with a maximum frequency of 160MHz, CMOS output, and support for crystal or external clock inputs. It is available in 8-TSSOP and 8-MSOP packages, making it suitable for compact digital systems that require frequency multiplication or clock generation. The verified distributor listing identifies the device as an 8-pin surface-mount clock-generator IC. A PLL-based clock generator multiplies or conditions a lower-frequency reference to produce a stable, high-frequency clock for digital logic, processors, communications equipment, and embedded systems. The ICS501G belongs to the broader clock and timing hierarchy: oscillator and crystal support → clock generator → PLL clock multiplier → digital timing subsystem. Its CMOS output and 160MHz maximum frequency suit moderate-speed digital clocking requirements, although timing margins must be checked for the selected operating condition. Key verified attributes include PLL operation, one clock-generator circuit, a 1:1 input-to-output ratio in the cited specification summary, and no differential input or output. The available package information is 8-TSSOP or 8-MSOP, depending on the orderable package variant represented by the ICS501G family listing. The exact electrical limits, crystal-load details, output-drive capability, jitter, and recommended decoupling requirements were not supplied in the verified excerpts and must be confirmed in the manufacturer datasheet before layout release. Typical uses include microcontroller and processor clock generation, digital interface timing, embedded control systems, and communications modules requiring a local high-frequency reference. The device is intended to replace conventional crystal-oscillator arrangements in suitable electronic systems, according to the Renesas product description. Designers should account for supply voltage, output load, trace impedance, grounding, and the timing relationship between the generated clock and downstream circuitry. A key design consideration is to validate the reference clock and PLL configuration against the exact datasheet before production. Keep the oscillator and feedback paths short, provide a clean return path, and place required decoupling capacitors close to the supply pins. Because the verified data does not state the full pinout, pin names, or package-specific ordering details, those values remain subject to datasheet verification. This page consolidates verified distributor specifications, official Renesas datasheet information, application guidance, and drop-in replacement constraints into an engineering-focused component record for sourcing and design review.
ICS501M - 160 MHz PLL Clock Generator | Renesas | SOIC-8
The Renesas Electronics ICS501M is a LOCO PLL clock-multiplier and clock-generator IC with a 2 MHz to 50 MHz input range and up to 160 MHz output, housed in an 8-pin SOIC package. It generates high-frequency clock signals from a lower-frequency crystal or clock input, making it useful where a board requires local frequency multiplication without relying on a full crystal oscillator. The verified product listing identifies the ICS501M as a clock-generator IC with a 160 MHz maximum output and an 8-SOIC package. A clock generator is an integrated timing device that accepts a reference clock and produces one or more clock outputs with controlled frequency and phase relationships. A PLL clock multiplier belongs to the clock and timing IC hierarchy, alongside oscillators, frequency synthesizers, phase-locked loops, and clock buffers. The ICS501M uses phase-locked-loop techniques to multiply a lower-frequency source into a higher-frequency output, reducing the need for a high-speed crystal when the downstream circuit can tolerate the device’s timing characteristics. The verified ICS501M data specifies a 2 MHz to 50 MHz input range and a maximum 160 MHz output. Its 8-pin SOIC package is a surface-mount gull-wing package, and distributor records classify the device as a clock-generator or PLL clock-multiplier IC. The available material also identifies the LOCO product family as a cost-effective way to produce high-quality high-frequency clock outputs from lower-frequency crystals or clock inputs. Detailed operating-temperature, voltage, jitter, output-waveform, and load-current values are not present in the supplied verified data. Typical design use includes communications and networking equipment, digital logic requiring a multiplied reference clock, embedded systems, instrumentation, and embedded processing platforms. The device can be placed after a stable low-frequency crystal or digital clock source when the receiving circuitry needs a higher clock frequency. Designers should verify output frequency tolerance, phase noise, supply requirements, and timing margins against the downstream load before releasing a production design. The key design consideration is that frequency multiplication is not a substitute for verifying the complete clock chain. The reference source, crystal or source impedance, PLL loop behavior, output loading, and downstream timing requirements must be checked together. Because the supplied data does not include the full electrical timing table, those parameters remain marked as data needed rather than inferred. This page combines verified distributor and manufacturer-document references, package information, application context, pricing status, and replacement-screening guidance. It is intended to support preliminary BOM research while directing engineers to the exact manufacturer datasheet for final electrical, timing, reliability, and qualification decisions.
ICS502M - 190MHz LOCO PLL Clock Multiplier | Renesas
Renesas Electronics ICS502M is a LOCO PLL clock multiplier that generates a high-quality clock output and reference from a low-frequency crystal or clock input. The device supports input clock frequencies from 2 MHz to 50 MHz and output clock frequencies up to 190 MHz, with a 3.0 V to 5.5 V operating-voltage range. It is packaged in an 8-pin SOIC and is designed to replace crystal oscillators in electronic systems requiring multiplied clock outputs. The low-cost oscillator architecture uses phase-locked-loop techniques and a standard fundamental-mode crystal to provide a compact frequency-multiplication solution. A clock generator, also called a clock multiplier or PLL clock generator, converts a lower-frequency reference into one or more higher-frequency timing signals. Within the broader clock and timing hierarchy, the ICS502M belongs to the oscillator family, the clock-generator family, and ultimately the timing-control IC category. Its phase-locked loop compares the reference with a divided feedback signal, adjusts the internal oscillator, and produces a stable multiplied output. This architecture makes it useful in systems needing a clock rate that is inconvenient or unavailable from a discrete crystal. Key verified features include a maximum output frequency of 190 MHz, input-frequency support from 2 MHz to 50 MHz, low jitter of 50 ps one sigma, and operation from 3.0 V to 5.5 V. The output can support 25 mA drive capability at TTL levels. Duty-cycle behavior is specified at 45/55 through 160 MHz, which is relevant when clocking TTL-compatible logic. The advanced low-power CMOS process supports portable and embedded equipment where clock generation must combine compactness with controlled power consumption. The ICS502M is suited to CPU and digital-logic clocking, communications equipment, test and measurement systems, industrial controls, and embedded platforms that can tolerate the deterministic jitter of a PLL-derived clock. Because PLL multiplication depends on the reference and feedback configuration, board-level layout, supply integrity, loop stability, and output loading can influence signal quality. The 8-pin SOIC package is straightforward to assemble but requires careful decoupling close to the supply pins and short, controlled clock routes to minimize added noise and skew. Designers should verify the required multiplication ratio, output frequency, duty-cycle limits, jitter budget, supply voltage, and downstream load before finalizing a design. They should also compare the PLL-derived output against the phase-noise requirements of any receiver, serializer, processor, or ADC. The manufacturer datasheet remains the authoritative source for programming details, timing characteristics, electrical limits, and the complete pin assignment. This page consolidates the verified manufacturer and distributor information for ICS502M, adds application-specific engineering context, and identifies same-package alternatives where the available cross-reference data supports direct replacement. It also distinguishes verified facts from parameters that still require confirmation from the complete datasheet or application-specific testing.
ICS512M - 200MHz Clock Generator | Renesas Electronics
The Renesas Electronics ICS512M is a 200 MHz clock generator IC with a PLL and bypass function, supplied in an 8-pin SOIC package measuring 0.154 inch, or 3.90 mm, in width. The listed device provides one clock-generation circuit, accepts a clock or crystal input, produces a CMOS output, and supports a 1:2 input-to-output ratio. According to the supplied distributor and manufacturer listings, its core function is to generate a high-quality, high-frequency clock output and a reference clock from a lower-frequency crystal or clock source. A PLL clock generator is a clock-and-timing integrated circuit that multiplies or organizes an input reference into one or more system clock outputs. Its place in the broader hierarchy is PLL clock generator > clock generator > clock and timing IC > integrated circuit. The ICS512M is therefore used when a system needs a more stable, controlled, or distributed clock derived from a lower-frequency source, especially where crystal and clock reference generation must share one compact device. The verified listing identifies the ICS512M as a 200 MHz clock generator with PLL bypass, crystal or clock input, CMOS output, one circuit, and a 1:2 ratio. These characteristics make it applicable to communication hardware, RF systems, digital boards, clock generation, timing distribution, and synchronization. The 8-SOIC surface-mount package supports compact designs where a through-hole clock generator would be unnecessarily large. The PLL architecture allows the device to produce a high-frequency output from a lower-frequency crystal or reference clock while retaining a bypass path for direct clocking. This architecture is useful when the design needs both a reference source and a multiplied clock without implementing multiple separate timing components. The 1:2 ratio is the most specific verified functional detail for the ICS512M, while other device parameters are not stated in the supplied search data. Typical uses include generating reference and operating clocks for communication equipment, synchronizing digital subsystems, supporting RF signal-chain timing, and furnishing a CMOS clock to board-level logic. In a multi-clock system, the device can reduce the number of discrete oscillator and divider blocks, but the final loop-filter, crystal, decoupling, and output-loading design must follow the manufacturer datasheet before production release. The primary design consideration is to confirm the exact input range, output waveform, jitter, operating temperature, and bypass behavior against the Renesas ICS512 datasheet. Engineers should also validate startup, crystal loop stability, and output loading in the intended PCB environment because those values are not fully provided in the retrieved search snippets. This page consolidates the verified Renesas and distributor information, separates confirmed specifications from missing datasheet parameters, identifies same-family drop-in candidates, and adds practical procurement and design guidance for engineers evaluating ICS512M clock-generation requirements.
ICS513M - 140MHz LOCO PLL Clock Generator | Renesas
The Renesas ICS513M is a LOCO PLL clock generator and fanout distributor with a maximum output frequency of 140 MHz, one clock circuit, CMOS output, and an 8-pin SOIC package. It accepts a crystal or external clock input and includes PLL bypass functionality, allowing it to generate a high-quality clock from a 14.31818 MHz crystal or clock source. The 1:2 input-to-output ratio reported in the verified product data supports clock multiplication use where a higher-frequency CMOS clock is required. A PLL clock generator is a clock-and-timing semiconductor that locks an internal phase-locked loop to a reference oscillator and multiplies or redistributes that reference into one or more stable digital clock outputs. In the product hierarchy, a PLL clock generator belongs to clock generation and distribution, then clock and timing ICs, then broader semiconductor and digital IC categories. It is used where a circuit requires a controlled relationship between a low-frequency crystal reference and a higher-frequency operating clock. The ICS513M's principal verified features include a 140 MHz maximum operating frequency, CMOS output logic, one clock circuit, support for both crystal and clock inputs, and PLL bypass capability. Its 8-SOIC package measures 3.90 mm in width according to the distributor listing. The 1:2 input-to-output ratio makes the device relevant to systems that need frequency multiplication from a standard 14.31818 MHz reference. Technically, the ICS513M combines reference generation with phase-locked-loop multiplication and clock distribution. The verified descriptions characterize it as a cost-effective way to produce a high-quality, high-frequency clock output. PLL bypass provides a selectable operating mode for designs that require direct reference-clock behavior rather than multiplied output, although the supplied data does not specify bypass propagation delay, jitter, lock time, or loop bandwidth. Typical uses include digital logic timing, communication equipment, embedded processing, and general-purpose clock distribution where a crystal or external clock is available. The ICS513M can be used as a clock source for circuits requiring a CMOS-compatible, multiplied clock derived from 14.31818 MHz. Its single-circuit fanout structure is appropriate for designs that need one primary high-frequency clock rather than multiple independently programmable outputs. When implementing the ICS513M, verify the crystal load capacitance, feedback-divider configuration, operating voltage, and output timing against the manufacturer datasheet. The verified snippets do not provide supply-voltage limits, output rise or fall times, phase jitter, RMS period jitter, or cycle-to-cycle jitter. Those timing and electrical details should be confirmed before using the device as a direct replacement for a different PLL generator. This page consolidates the verified distributor specifications, genuine source links, application guidance, and same-family replacement candidates. It also distinguishes confirmed ICS513M parameters from unavailable electrical and timing data so engineers can make a traceable component-selection decision rather than treating unsupported values as guaranteed specifications.
ICS514M - 140MHz PLL Clock Generator | Renesas | 8-SOIC
Renesas Electronics ICS514M is a 140MHz clock generator and fanout-distribution IC that uses a phase-locked loop to multiply a 14.31818MHz crystal or clock reference. It is packaged in an 8-pin SOIC measuring 3.90mm wide and operates from a 3V to 5.5V supply in the commercial 0°C to 70°C temperature range. A clock generator is a timing IC that converts a stable low-frequency reference into one or more higher-frequency clock signals. Clock generators and fanout-distribution devices form part of the broader clock and timing IC category, supporting clock synthesis, distribution, and system timing in digital equipment. The ICS514M uses PLL multiplication to provide a practical alternative to selecting and sourcing a high-frequency crystal for every clocked circuit. The device supports a 14.31818MHz crystal or clock input and reaches a maximum output frequency of 140MHz. Its configurable S1 and S0 input pins provide operating-state control referenced in the datasheet: when S1 and S0 are both low, the internal PLL is disabled, the CLK output remains low, and the crystal oscillator and REF output remain active. This permits a system to retain reference-clock availability while suppressing the divided or multiplied clock output. The 8-pin surface-mount SOIC package supports compact clock-generation layouts in industrial, communications, consumer, and embedded equipment. Operating from 3V to 5.5V makes the device usable with both 3.3V and 5V system rails, although the complete external crystal, load-capacitor, and output-loading design must be evaluated against the manufacturer datasheet. Its maximum 140MHz rating is a key selection criterion for processors, programmable logic, communications equipment, and digital peripherals requiring a multiplied reference. A primary design consideration is that PLL programming, crystal accuracy, load capacitance, output jitter, and allowable operating modes must be checked before layout release. Decoupling capacitors should be placed close to the supply pins, and clock traces should be routed with controlled impedance and short return paths to minimize noise pickup and crosstalk. The stated 140MHz maximum should not be treated as guaranteed performance for every crystal and output-divider configuration. This product page consolidates the verified manufacturer and distributor information, provides engineering-oriented selection guidance, identifies same-footprint alternatives, and highlights design details that help buyers compare ICS514M clock generators more efficiently than a basic distributor listing alone.
ICS542M - 156 MHz 1:2 Clock Divider | Renesas | SOIC-8
The Renesas Electronics ICS542M is a clock fanout buffer and programmable divider IC with a maximum input frequency of 156 MHz, supplied in an 8-pin SOIC package. It accepts a CMOS clock and provides divided outputs using selectable divide ratios of 2, 4, 6, 8, 12, or 16. Its 3 V to 5.5 V operating-supply range supports both 3.3 V and 5 V systems, while the 1:2 distribution function provides two clock outputs from one source. A clock divider is a timing IC that derives one or more lower-frequency or phase-related clock signals from an input reference. Within the broader clock and timing hierarchy, the ICS542M belongs to the clock-buffer, clock-distribution, and clock-divider category. This functionality is useful when a subsystem needs a divided reference clock, multiple outputs for parallel logic, or a lower-frequency signal generated without adding a separate oscillator and PLL. Key verified specifications include a maximum frequency of 156 MHz, a 1:2 output configuration, CMOS inputs, CMOS three-state outputs, and a 3 V to 5.5 V supply range. The listed divider ratios permit useful choices for digital clocking, data converters, communications modules, and embedded systems. The package designation is 8-SOIC with a stated width of 0.154 inches, or 3.90 mm. The ICS542M combines clock division and distribution in one device. The divide control selects the relationship between the input clock and the generated outputs, while the fanout section supports distribution to two destinations. This integration can reduce the number of separate timing components required when only one of the available divide ratios is needed. Because the verified product information does not include detailed propagation-delay, output-duty-cycle, rise-time, fall-time, or jitter values, those characteristics should be checked in the current Renesas datasheet before high-speed timing closure. Typical uses include clock distribution for digital logic, generating a divided reference for data-acquisition systems, supporting communications equipment, and producing deterministic clocks in embedded control platforms. The 156 MHz ceiling accommodates demanding CMOS clock trees, but actual system operation must account for supply voltage, temperature, load capacitance, and the selected divider ratio. For layout, place the device close to the clock source and receiving circuits to minimize trace length and propagation-delay variation. Keep output traces short, provide the decoupling specified by the manufacturer datasheet, and use controlled-impedance routing when outputs drive longer PCB traces. Verify unused-output state, enable or three-state behavior, and rise/fall-time requirements in the system timing budget. This page consolidates the verified Renesas and distributor information, lifecycle evidence, practical clock-tree design guidance, and a transparent comparison of parameter gaps. It also distinguishes confirmed electrical facts from unverified details rather than inferring missing timing values or assuming drop-in alternatives where the supplied cross-reference data does not prove compatibility.