{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HC7046AM","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HC7046AM","canonicalUrl":"https://icboms.com/texas-instruments/CD74HC7046AM","factsUrl":"https://icboms.com/api/mcp/products/CD74HC7046AM","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, Phase Lock Loop (PLL) with VCO and lock detect, single circuit, CMOS I/O, 38 MHz max, 2V–6V supply, -55°C to 125°C, 16-SOIC","salesMarkdown":"## PLL core with integrated VCO and lock detection The CD74HC7046AM is a single-circuit phase-locked loop (PLL) that integrates a voltage-controlled oscillator (VCO) and a lock detector, per the 74HC logic family. It accepts CMOS-level inputs and drives CMOS outputs, making it a direct fit for digital clock synthesis and frequency tracking in 2V to 6V systems. The 38 MHz maximum frequency sets the upper bound for the loop bandwidth — beyond that, the phase detector gain rolls off and the VCO linearity degrades. ## Frequency ceiling and loop design considerations At 38 MHz max, this PLL is suited for clock generation up to that frequency, but the practical loop bandwidth is lower — typically 1/10th of the VCO frequency to keep the loop stable and the phase noise within the lock-detector threshold. The 1:2 input-to-output ratio means the VCO output can be divided by two internally, which helps when the reference is slower than the target clock. ## Temperature range and deployment environment Rated for -55°C to 125°C, the CD74HC7046AM covers military and industrial extremes. The wide temperature grade means the PLL's phase-detector gain and VCO tuning range are characterised across the full span — critical for avionics, downhole instrumentation, or outdoor telecom where the ambient temperature varies by 150°C or more. The 16-SOIC package (3.90 mm width) is a standard surface-mount footprint, reflow-compatible with typical Pb-free profiles. ## Production status and sourcing posture For BOM planning, the active status means no immediate end-of-life risk, but the 74HC family is mature — confirm lead time and pricing against your quantity at quote time.","metaTitle":"CD74HC7046AM PLL with VCO & Lock Detect – Texas Instruments","metaDescription":"Texas Instruments CD74HC7046AM PLL IC, 38 MHz max, -55°C to 125°C, 16-SOIC. Active production.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Phase Lock Loop (PLL)","Input":"CMOS","Output":"CMOS","Series":"74HC","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","Frequency - Max":"38MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Divider/Multiplier":"No/No","Number of Circuits":"1","Ratio - Input:Output":"1:2","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"16-SOIC","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.02","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.02000","currency":"USD"},{"qty":10,"price":"$2.71500","currency":"USD"},{"qty":25,"price":"$2.56640","currency":"USD"},{"qty":100,"price":"$2.22410","currency":"USD"},{"qty":250,"price":"$2.11004","currency":"USD"},{"qty":500,"price":"$1.89332","currency":"USD"},{"qty":1000,"price":"$1.61400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/95ac1c8e8ddaf68f854a6c057c4ad625.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum frequency of CD74HC7046AM?","answer":"The datasheet specifies a maximum frequency of 38 MHz. This is the VCO's upper limit; the practical loop bandwidth for stable phase-lock is typically lower, around 3–4 MHz, depending on the loop filter design."},{"question":"Is CD74HC7046AM compatible with 3.3V logic?","answer":"Yes. The supply voltage range is 2V to 6V, so 3.3V operation is within spec. The CMOS input thresholds scale with VCC — at 3.3V, the logic-high threshold is approximately 2.3V, which is compatible with 3.3V CMOS outputs."},{"question":"How does CD74HC7046AM compare to the through-hole CD74HCT7046AE?","answer":"The CD74HCT7046AE is the through-hole (DIP-16) variant of the same PLL core, with 4.5V minimum supply and 74HCT logic levels. The CD74HC7046AM runs on 2V–6V and uses a surface-mount SOIC-16 footprint. Functionally identical for clock synthesis and lock detection, but the HCT version has tighter supply tolerance and is not pin-compatible due to package differences."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HC7046AM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HC7046AM 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}}