{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MCP4432-104E/ST","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"MCP4432-104E-ST","canonicalUrl":"https://icboms.com/microchip/MCP4432-104E-ST","factsUrl":"https://icboms.com/api/mcp/products/MCP4432-104E%2FST","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology MCP4432-104E/ST digital potentiometer, quad 100kΩ rheostat, 129 taps, Linear taper, I²C interface, 14-TSSOP tube.","salesMarkdown":"## Quad 100k rheostat with 129-tap resolution The MCP4432-104E/ST is a quad-channel digital rheostat from Microchip's MCP44XX family, each channel offering 100 kΩ end-to-end resistance with 129 tap positions — enough resolution for fine-grained analog trimming in bias networks, sensor offset calibration, or programmable gain stages. The I²C interface with selectable address (the 'Selectable Address' feature) lets up to eight devices share the same bus, giving 32 independent rheostat channels on one two-wire bus. The 150 ppm/°C temperature coefficient on resistance means a 100 kΩ nominal value drifts about 1.5 kΩ over a 100°C swing — acceptable for many trim applications, but worth derating if the divider ratio must stay tight across the full temperature range. Housed in a 14-lead TSSOP (4.40 mm body width), the MCP4432-104E/ST fits a compact surface-mount footprint. Supplied in tube packaging — typical for prototype quantities or low-volume production. For reeled tape-and-reel packaging, check the alternate order code suffix at RFQ. ## Volatile memory — wiper resets on power-up The volatile memory type means the wiper position defaults to mid-scale (tap 64 of 129) at power-on and is lost when the supply drops. The firmware must re-initialise the wiper registers after every power cycle if a specific starting value is required. The 75 Ω typical wiper resistance adds a small series offset — negligible for a 100 kΩ divider but relevant if the rheostat drives a low-impedance node directly. ROHS3 compliant, with no restricted substances above the threshold limits.","metaTitle":"Microchip MCP4432-104E/ST Digital Pot, 100kΩ, 129 Taps, I²C","metaDescription":"MCP4432-104E/ST quad 100kΩ digital rheostat with 129 taps, I²C interface, ±20% tolerance, -40°C to 125°C. Active, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Taper":"Linear","Package":"Tube","Features":"Selectable Address","Interface":"I²C","Tolerance":"±20%","Memory Type":"Volatile","Configuration":"Rheostat","Mounting Type":"Surface Mount","Number of Taps":"129","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"1.8V ~ 5.5V","Resistance (Ohms)":"100k","Number of Circuits":"4","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"14-TSSOP","Temperature Coefficient (Typ)":"150ppm/°C","Resistance - Wiper (Ohms) (Typ)":"75"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.81","priceTiers":[{"qty":1,"price":"$1.81000","currency":"USD"},{"qty":25,"price":"$1.51600","currency":"USD"},{"qty":100,"price":"$1.41000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bf19bea1fe5b665245bbc39de7f205a8.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MCP4432-104E%2FST/alternatives.json"},"ai":{"faq":[{"question":"What is the MCP4432-104E/ST's taper and why does it matter?","answer":"The taper is Linear, meaning each tap step changes resistance by an equal amount — about 775 Ω per step for the 100 kΩ range. This suits linear gain adjustments or voltage dividers; for audio volume controls where the ear responds logarithmically, a log-taper part would be needed."},{"question":"Is MCP4432-104E/ST a drop-in replacement for MCP4014T-103E/OT?","answer":"No. The MCP4014T-103E/OT is a single-channel 10 kΩ rheostat with 64 taps and an Up/Down interface in a tiny SOT-23-5 package. The MCP4432-104E/ST is quad-channel, 100 kΩ, 129 taps, I²C, in a 14-TSSOP — different pinout, different footprint, different interface. A board spin is required."},{"question":"What compliance documentation does Microchip provide for MCP4432-104E/ST?","answer":"The part is ROHS3 compliant. Microchip publishes the standard conflict minerals report and material declaration for the MCP44XX family. No UL or IEC certification is listed for this device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/MCP4432-104E-ST","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/MCP4432-104E-ST when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}