{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F100R4H6B","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F100R4H6B","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F100R4H6B","factsUrl":"https://icboms.com/api/mcp/products/STM32F100R4H6B","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F100R4H6B, STM32F1 series, 32-bit ARM Cortex-M3 MCU, 24 MHz core, 16 KB Flash, 4 KB RAM, 51 I/O, 64-TFBGA (5x5 mm), -40 to 85°C, 2.0 to 3.6 V supply.","salesMarkdown":"## Value-line Cortex-M3 in a BGA — what the 24 MHz and 16 KB Flash mean for your BOM The STM32F100R4H6B is STMicroelectronics' entry-point STM32F1 value-line MCU built around an ARM Cortex-M3 core running at 24 MHz. The 51 general-purpose I/O pins in a 64-TFBGA package give you more signal routing than a comparable 48-pin QFP, at the cost of a BGA footprint that requires via fanout and X-ray inspection on the line. ## Flash and RAM budget — sizing the firmware before you commit 16 KB of program memory (16K x 8) and 4 KB of SRAM (4K x 8) are the hard limits for this part. A bare-metal UART-to-sensor bridge or a simple PWM fan controller fits comfortably. If your application needs a CANopen stack, a USB device stack, or any non-trivial data logging buffer, the memory ceiling will force a move up the STM32F100 density ladder — the 32 KB or 64 KB Flash siblings share the same pinout and peripherals, so the board spin is minimal. ## 64-TFBGA — layout and rework considerations The exposed center pad is not a thermal slug — it's a ground-plane tie for signal integrity. For rework, a hot-air profile with bottom-side preheat is standard; expect to X-ray every joint because the balls under the die are not visually inspectable. ## Supply range and logic levels The VDD range is 2.0 V to 3.6 V, so the part runs on a single 3.3 V rail without a regulator. All I/O are 3.3 V tolerant; 5 V-tolerant inputs are not available on this value-line variant, so level shifting is required when interfacing with 5 V peripherals. On-chip peripherals include DMA, a power-on reset (POR), a programmable voltage detector (PVD), a temperature sensor, and a watchdog timer. The 12-bit ADC has 16 multiplexed channels; the 12-bit DAC has two channels. No USB or CAN peripheral on this die, so those interfaces need an external transceiver or a different STM32F1 variant. For dual-sourcing resilience, the pin-compatible STM32F100R6H6B (32 KB Flash) and STM32F100R8H6B (64 KB Flash) are direct drop-in alternatives within the same package and temperature grade.","metaTitle":"STM32F100R4H6B ARM Cortex-M3 MCU, 24 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM32F100R4H6B 32-bit ARM Cortex-M3 MCU at 24 MHz with 16 KB Flash, 4 KB RAM, 51 I/O, 64-TFBGA. Active lifecycle, industrial temp range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"24MHz","Series":"STM32F1","Package":"Tray","RAM Size":"4K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"DMA, PDR, POR, PVD, PWM, Temp Sensor, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"51","Core Processor":"ARM® Cortex®-M3","Package / Case":"64-TFBGA","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F100","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-TFBGA (5x5)","Voltage - Supply (Vcc/Vdd)":"2V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.6954","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bce8111c76ae6a908001d11363aee0ec.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F100R4H6B/alternatives.json"},"ai":{"faq":[{"question":"What is the best alternative for STM32F100R4H6B if it's out of stock?","answer":"The closest pin-compatible alternatives within the same STM32F100 value-line family are the STM32F100R6H6B (32 KB Flash) and STM32F100R8H6B (64 KB Flash). They share the same 64-TFBGA package, 24 MHz core, peripheral set, and temperature range, so a BOM swap requires no board spin — only a firmware update to account for the larger memory map."},{"question":"Does STM32F100R4H6B work with 3.3V logic only?","answer":"Yes. The part does not support 5 V-tolerant inputs, so any interface to 5 V logic requires an external level shifter or a voltage divider."},{"question":"What is STM32F100R4H6B's listed speed?","answer":"The core runs at 24 MHz. This is the maximum clock from the internal oscillator or an external crystal; the flash wait state must be set to 1 before raising the core clock above 0 MHz, or the first branch instruction will hard-fault."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F100R4H6B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F100R4H6B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}