{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"74HC9115D/S400118","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"74HC9115D-S400118","canonicalUrl":"https://icboms.com/nxp/74HC9115D-S400118","factsUrl":"https://icboms.com/api/mcp/products/74HC9115D%2FS400118","rawCanonicalId":null},"summary":{"shortDescription":"74HC9115D/S400118, 74HC series, Buffer Non-Inverting, Schmitt Trigger Input, Open Drain Output, 9 Elements, 1 Bit per Element, 2V-6V Supply, -40°C to 125°C, 20-SOIC Surface Mount.","salesMarkdown":"## What this 74HC9115D/S400118 buffer does on your board The 74HC9115D/S400118 is a 9-element, non-inverting buffer from the 74HC logic family. Each element is a single-bit buffer with a Schmitt-trigger input and an open-drain output. The open-drain output lets you wire multiple outputs together for a wired-OR configuration, and it also enables level translation—pulling the output to a different voltage rail than the supply via an external pull-up resistor. The Schmitt-trigger input cleans up slow or noisy edges, which helps maintain signal integrity in industrial environments or across long PCB traces. Housed in a 20-SOIC (7.50 mm body width) surface-mount package, it fits standard SOIC-20 footprints. The low-side sink capability is 5.2 mA per output; the high-side drive is not specified because the open-drain output only pulls low—the pull-up resistor determines the high-level current. ## Open-drain outputs and wired-OR flexibility Because the output is open drain, multiple 74HC9115D/S400118 buffers can share a common pull-up resistor. This wired-OR connection is useful for interrupt lines, bus-request signals, or any shared line where any driver can assert a low. The pull-up resistor value sets the rise time and the high-level voltage, so you can match the output to a 1.8V, 2.5V, 3.3V, or 5V receiver independent of the buffer's VCC. The 5.2 mA sink current per output is sufficient for driving TTL inputs, small LEDs, or the base of a transistor switch. If you need more drive, buffer multiple elements in parallel—the package holds nine independent buffers. ## Schmitt-trigger inputs: noise immunity and edge conditioning The Schmitt-trigger input has built-in hysteresis, typically a few hundred millivolts. This prevents false triggering on slow-rising signals from RC oscillators, sensor outputs, or long cables. In a motor-drive environment where PWM edges couple noise onto control lines, the hysteresis rejects glitches shorter than the propagation delay. ## Lifecycle and sourcing posture For a BOM line, this removes the immediate risk of a forced redesign.","metaTitle":"74HC9115D/S400118 74HC Buffer, Non-Inverting, Open Drain","metaDescription":"74HC9115D/S400118 is a 74HC series buffer with Schmitt-trigger inputs and open-drain outputs. Supply 2V-6V, -40°C to 125°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74HC","Package":"Bulk","Input Type":"Schmitt Trigger","Logic Type":"Buffer, Non-Inverting","Output Type":"Open Drain","Mounting Type":"Surface Mount","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"9","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"20-SO","Current - Output High, Low":"-, 5.2mA","Number of Bits per Element":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5","stockQuantity":0,"priceTiers":[{"qty":799,"price":"$0.50000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/649e5dc5a071ecd8405abf2032977b93.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 74HC9115D/S400118 open drain?","answer":"Yes, the output type is open drain. The buffer only pulls the output low; a pull-up resistor to the desired high-level voltage is required. This enables wired-OR connections and level shifting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/74HC9115D-S400118","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/74HC9115D-S400118 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}}