{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5V41234NLG","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"5V41234NLG","canonicalUrl":"https://icboms.com/renesas/5V41234NLG","factsUrl":"https://icboms.com/api/mcp/products/5V41234NLG","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 5V41234NLG clock generator IC, PLL Yes, input LVCMOS/Crystal, output HCSL/LVDS, 100 MHz max, 1:1 ratio, 3.135V-3.465V supply, 0°C to 70°C, 16-VFQFN Exposed Pad, Tray.","salesMarkdown":"## PCIe reference clock in a 16-pin QFN — what this part does The Renesas 5V41234NLG is a single-output PCI Express clock generator with an integrated PLL. It takes a single-ended LVCMOS or crystal input and produces a differential HCSL or LVDS output at up to 100 MHz, making it a direct fit for a PCIe reference clock tree where you need exactly one clean differential pair from a local oscillator or board-level clock. The 1:1 input-to-output ratio means this is a buffer or clean-up PLL, not a fanout device — one clock in, one clock out, with the PLL cleaning up jitter and generating the differential swing the PCIe PHY expects. The 3.135 V to 3.465 V supply range keeps it on the standard 3.3 V rail, and the 0°C to 70°C operating temperature limits it to commercial indoor gear — think servers, switches, and test equipment, not a truck or a rooftop radio. ## 100 MHz ceiling and what it means for your PCIe generation The 100 MHz maximum frequency is the hard ceiling for the output. PCIe Gen 1 through Gen 3 all use a 100 MHz reference clock (the SerDes multiplies it internally), so this part covers those generations. If you are designing for Gen 4 or Gen 5, which still use 100 MHz but with tighter phase jitter requirements, check whether the 5V41234NLG's jitter performance meets the spec — the datasheet's phase noise plots will tell you. The PLL is present and doing the work, but the jitter cleanup margin is what matters at higher data rates. ## Package and mounting — 16-VFQFN with exposed pad The 16-VFQFN package with exposed pad (3x3 mm body) is a surface-mount part that needs a thermal via pattern under the paddle for both heat sinking and ground return. The exposed pad is the primary thermal path — without it, the junction temperature climbs quickly if the part is running near the 100 MHz limit in a warm enclosure. The 0°C to 70°C commercial temperature grade means this is not rated for extended industrial or automotive environments, so keep it on the indoor PCB. ## Sourcing and lifecycle — active, no LTB worry The 5V41234NLG carries an Active product status and ROHS3 compliance. No second-source or direct replacement is listed in the official records, so dual-sourcing would require qualifying a different PCIe clock generator from the same or another vendor.","metaTitle":"5V41234NLG PCIe Clock Generator, PLL, 100 MHz, 16-VFQFPN","metaDescription":"5V41234NLG clock generator IC with PLL for PCI Express. 100 MHz max, HCSL/LVDS outputs, LVCMOS/crystal input. 0°C to 70°C, 16-VFQFPN. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Input":"LVCMOS, Crystal","Output":"HCSL, LVDS","Package":"Tray","Main Purpose":"PCI Express (PCIe)","Mounting Type":"Surface Mount","Package / Case":"16-VFQFN Exposed Pad","Frequency - Max":"100MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.135V ~ 3.465V","Number of Circuits":"1","Ratio - Input:Output":"1:1","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"16-VFQFPN (3x3)","Differential - Input:Output":"No/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.35","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.35000","currency":"USD"},{"qty":10,"price":"$3.00500","currency":"USD"},{"qty":25,"price":"$2.84080","currency":"USD"},{"qty":80,"price":"$2.46188","currency":"USD"},{"qty":230,"price":"$2.33561","currency":"USD"},{"qty":624,"price":"$2.09575","currency":"USD"},{"qty":1248,"price":"$1.76750","currency":"USD"},{"qty":2496,"price":"$1.67913","currency":"USD"},{"qty":4992,"price":"$1.61600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9e24fdbb83577cf699b875c3ec933d9a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional equivalent to 5V41234NLG?","answer":"The 9DB803DFLFT is a PCIe clock generator with HCSL outputs and a 400 MHz maximum frequency, but it has a 1:8 fanout ratio versus the 5V41234NLG's 1:1 ratio. The 5V41234NLG is a single-output clean-up PLL; the 9DB803DFLFT is a fanout buffer. They are not pin-compatible drop-in replacements — the 9DB803DFLFT is a different part for a different fanout need."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/5V41234NLG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/5V41234NLG 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}}