{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8CMBR3102-SX1I","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8CMBR3102-SX1I","canonicalUrl":"https://icboms.com/infineon/CY8CMBR3102-SX1I","factsUrl":"https://icboms.com/api/mcp/products/CY8CMBR3102-SX1I","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CapSense® Express™ SmartSense™ capacitive touch controller, CY8CMBR3102-SX1I, 2 button inputs, I²C, 1.8V-5.5V, proximity detection, 8-SOIC, -40°C to 85°C.","salesMarkdown":"## Capacitive touch controller with SmartSense auto-tuning The CY8CMBR3102-SX1I is a two-button capacitive touch controller from the CapSense® Express™ SmartSense™ family, designed to replace mechanical buttons and switches in human-machine interfaces. It integrates the sensing electrodes, a proximity detection engine, and an I²C communication interface into an 8-pin SOIC package. The SmartSense™ auto-tuning algorithm handles electrode parasitic capacitance and environmental drift without manual calibration — the controller adjusts its own thresholds during operation, so the same BOM works across different panel thicknesses and overlay materials. ## Supply range, temperature grade, and current draw The 140 mA supply current is the peak draw with both channels active and the LED driver on — the actual consumption depends on the scan rate and the number of enabled sensors. ## I²C interface and LED driver channel The I²C interface operates as a slave device; the host reads touch status, proximity data, and configures the button thresholds and LED behaviour through register writes. No external ADC or GPIO expander is needed — the controller handles the full capacitive sense-to-digital conversion on-chip. One integrated LED driver channel supports a single backlight or touch-feedback LED, sinking current directly from the supply rail without an external transistor. The LED brightness and on-time are programmable over the I²C bus. ## Active production and compliance documentation No pin-compatible second-source is listed — the BOM position is locked to this order code unless a board spin is acceptable.","metaTitle":"Infineon CY8CMBR3102-SX1I CapSense Express, 8-SOIC","metaDescription":"Active-production capacitive touch controller, 2 button inputs, I²C interface, proximity detection, -40 to 85°C. ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":"CapSense® Express™ SmartSense™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Type":"Buttons","Series":"CapSense® Express™ SmartSense™","Package":"Tube","Interface":"I²C","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"140mA","Number of Inputs":"Up to 2","Voltage - Supply":"1.8V ~ 5.5V","LED Driver Channels":"Up to 1","Proximity Detection":"Yes","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.00000","currency":"USD"},{"qty":10,"price":"$1.79300","currency":"USD"},{"qty":25,"price":"$1.69160","currency":"USD"},{"qty":100,"price":"$1.44140","currency":"USD"},{"qty":250,"price":"$1.35340","currency":"USD"},{"qty":500,"price":"$1.18422","currency":"USD"},{"qty":1000,"price":"$0.98122","currency":"USD"},{"qty":2500,"price":"$0.91354","currency":"USD"},{"qty":5000,"price":"$0.87971","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8CMBR3102-SX1I","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8CMBR3102-SX1I when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}