ICS411M
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.
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