{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IMIFS731BZB","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IMIFS731BZB","canonicalUrl":"https://icboms.com/infineon/IMIFS731BZB","factsUrl":"https://icboms.com/api/mcp/products/IMIFS731BZB","rawCanonicalId":null},"summary":{"shortDescription":"Spread Spectrum Clock Generator, PLL Yes, 1 Circuit, 1:2 Ratio, CMOS/TTL Input/Output, 4.5V~5.5V Supply, 0°C~70°C, 8-SOIC Package.","salesMarkdown":"## What this clock generator does for your board The IMIFS731BZB is a spread spectrum clock generator with an integrated PLL, designed to reduce electromagnetic interference (EMI) by spreading the output clock energy across a small frequency band rather than concentrating it at a single peak. It accepts a single CMOS or TTL input clock and delivers two buffered copies (1:2 ratio) at the same frequency, also in CMOS or TTL levels. The part runs from a 4.5V to 5.5V supply and is specified over the commercial temperature range of 0°C to 70°C. ## Supply voltage and temperature — fit for the BOM The 4.5V to 5.5V supply range means this part is strictly a 5V device. If your board runs on 3.3V, you will need a separate regulator or a different clock generator. The 0°C to 70°C commercial temperature grade limits it to indoor, office, or appliance environments — not for a motor drive, outdoor telecom cabinet, or anything under the hood. For industrial or automotive use, look for a part rated -40°C to +85°C or wider. ## PLL and spread spectrum — the EMI play The integrated PLL (yes, it is listed) is the active core that generates the spread-spectrum modulation. The spread-spectrum function is the main reason to pick this part: it reduces peak EMI emissions at the fundamental and harmonics, which can help pass FCC or CISPR radiated-emission tests without adding ferrite beads or shielding. The 1:2 fan-out gives you two synchronous copies of the input clock — enough to drive a small logic cluster or two loads, but not a multi-drop bus. ## Package and handling — field-service friendly The 8-SOIC (0.154\" wide, 3.90mm body) is a common, easy-to-solder footprint. No hot-air station needed — a standard soldering iron and some wick will swap it on site. Orientation is clear from the pin-1 notch. No special ESD precautions beyond the usual wrist strap.","metaTitle":"IMIFS731BZB Spread Spectrum Clock Generator, PLL, 4.5V-5.5V","metaDescription":"IMIFS731BZB is a spread spectrum clock generator with integrated PLL, 1:2 fan-out, CMOS/TTL I/O, 4.5V-5.5V supply, 0°C-70°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Spread Spectrum Clock Generator","Input":"CMOS, TTL","Output":"CMOS, TTL","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:2","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"8-SOIC","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.75","stockQuantity":0,"priceTiers":[{"qty":401,"price":"$0.75000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9352d2eebff63663308c79e277a48dc2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of IMIFS731BZB?","answer":"The CY2305SXI-1HT is a functionally similar spread-spectrum clock generator with a PLL, but it runs on 3.0V, offers a 1:5 fan-out, and is rated -40°C to 85°C. It is not a pin-for-pin drop-in replacement — the supply voltage and output count differ."},{"question":"What is the function of IMIFS731BZB?","answer":"It is a spread spectrum clock generator with an integrated PLL. It takes one CMOS or TTL input clock and outputs two buffered copies at the same frequency, spreading the energy to reduce EMI."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IMIFS731BZB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IMIFS731BZB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}