{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4146LQI-S423T","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4146LQI-S423T","canonicalUrl":"https://icboms.com/infineon/CY8C4146LQI-S423T","factsUrl":"https://icboms.com/api/mcp/products/CY8C4146LQI-S423T","rawCanonicalId":null},"summary":{"shortDescription":"Infineon PSoC® 4 CY8C4100S series ARM Cortex-M0+ MCU, 48 MHz, 64 KB Flash, 8 KB RAM, 34 I/O, CapSense, 12-bit SAR ADC, 40-QFN 6x6 mm, -40°C to 85°C, ROHS3.","salesMarkdown":"## Active production — no design-in gate The CY8C4146LQI-S423T: ROHS3 compliant per the manufacturer's declaration, so no exemption paperwork needed for EU or global BOMs. ## Cortex-M0+ at 48 MHz — what the core delivers ARM Cortex-M0+ single-core running at 48 MHz — the standard entry-level 32-bit throughput for sensor-fusion, touch-interface, and low-power control loops. The 64 KB Flash and 8 KB RAM (8K x 8) budget leaves room for a CapSense library, communication stacks, and a modest RTOS footprint. Program memory is Flash — field-upgradable firmware without an external EEPROM for bootloader storage. ## CapSense and analog — what the peripheral set actually means Integrated CapSense controller with 16-channel 12-bit SAR ADC and two IDAC outputs — this is the block that turns a touch-sensor board into a single-chip design. The 10-bit slope ADC is there for low-resolution monitoring; the 12-bit SAR handles the signal-chain work. WDT guards against firmware hangs in unattended equipment. ## Supply and temperature — single-rail, industrial range No second supply needed for the analog peripherals; the internal LDO handles the core. A factory-floor sensor node or outdoor enclosure with passive solar heating stays inside the envelope without active cooling. ## 40-QFN 6x6 mm — layout note Package is 40-UFQFN exposed pad, supplier device package 40-QFN (6x6 mm). The exposed paddle is the ground return for the core and analog — the datasheet's recommended footprint ties it to the ground plane with multiple vias for thermal relief. Without that, the junction temperature rises faster than the 85°C ambient limit suggests. 34 I/O in a 40-pin QFN means most pins are GPIO — useful for a keypad matrix or parallel LCD data bus without needing a port expander. ## Serial connectivity — the bus mix For a sensor hub, the I²C bus talks to the IMU and ambient-light sensor; the UART talks to a host controller or BLE module. LINbus is there for automotive sub-bus nodes, though the temperature grade is industrial, not automotive. Internal oscillator means no external crystal is required for the core clock — two less BOM lines and two less layout constraints. The internal RC is trimmed to ±1% over temperature per the PSoC 4 family specification.","metaTitle":"CY8C4146LQI-S423T PSoC 4 MCU, 48 MHz, 64 KB Flash, 40-QFN","metaDescription":"Active-production ARM Cortex-M0+ MCU from Infineon PSoC 4 CY8C4100S series. 48 MHz, 64 KB Flash, 8 KB RAM, CapSense, 12-bit ADC. 40-QFN 6x6 mm. ROHS3.","metaKeywords":null},"attributes":{"series":"PSOC® 4 CY8C4100S","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"48MHz","Series":"PSOC® 4 CY8C4100S","Package":"Tape & Reel (TR); Cut Tape (CT)","RAM Size":"8K x 8","Core Size":"32-Bit Single-Core","Peripherals":"Brown-out Detect/Reset, CapSense, LCD, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"34","Core Processor":"ARM® Cortex®-M0+","Package / Case":"40-UFQFN Exposed Pad","Data Converters":"A/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"40-QFN (6x6)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.88","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.88000","currency":"USD"},{"qty":10,"price":"$3.48600","currency":"USD"},{"qty":25,"price":"$3.29520","currency":"USD"},{"qty":100,"price":"$2.85580","currency":"USD"},{"qty":250,"price":"$2.70932","currency":"USD"},{"qty":500,"price":"$2.43108","currency":"USD"},{"qty":1000,"price":"$2.05030","currency":"USD"},{"qty":2500,"price":"$1.94778","currency":"USD"},{"qty":5000,"price":"$1.87456","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1ace7f65017fc7aa7d4f2258d7a89bb2.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4146LQI-S423T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4146LQI-S423T 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}}