STM32C531CBU6 - 144MHz Cortex-M33 MCU, 128KB Flash | ST
N.º da peça: STM32C531CBU6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.1 | $31,00 |
| 100 | $2.78 | $278,00 |
| 500 | $2.51 | $1.255,00 |
| 1.000 | $2.28 | $2.280,00 |
STM32C531CBU6 Visão geral
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals into one chip, forming the lowest layer of the embedded processing hierarchy: Cortex-M33 core -> MCU -> embedded system. Mainstream MCUs like the STM32C5 series target cost-sensitive general-purpose designs that still require high performance, low power consumption, and modern security features.
Key features of the STM32C531CBU6 include the single-precision FPU inside the Cortex-M33 core, which supports all Arm single-precision data-processing instructions and data types, enabling efficient floating-point math for sensor fusion and control loops. The 144 MHz core clock delivers high computation throughput, while the 128 KB flash and 64 KB RAM provide headroom for protocol stacks and application code. The integrated I3C interface provides a forward-looking, two-wire sensor bus that is backward-compatible with I2C.
According to the STMicroelectronics datasheet, the STM32C53xxx family is fabricated on ST's 40 nm process technology, balancing performance, power, and cost. The device targets cost-sensitive applications that require a balance between high performance, low power consumption, and high security.
Typical applications include industrial sensors, consumer appliances, motor control, IoT endpoints, and building automation nodes, where the 144 MHz Cortex-M33 and I3C support fast sensor aggregation.
Design consideration: verify pin mapping against the official STM32C531CB datasheet before layout, and use ST's STM32CubeMX tool for pinout and clock configuration.
This page adds distributor sourcing data, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para STM32C531CBU6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32C531CCU6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32C511CBU6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32C511C8U6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32C531CBT6
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
STM32C531CBU6 Classificações máximas e características elétricas
| Core | ARM Cortex-M33F 32-bit RISC |
| Core Frequency | 144 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 64 KB |
| FPU | Single-precision (supports all Arm single-precision instructions) |
| Series | STM32C5 (STM32C53xxx) |
| Special Interfaces | I3C |
| Encapsulamento | 48-UFQFPN (7x7 mm) |
| Tipo de montagem | Surface Mount |
| Process Technology | 40 nm (per ST product description) |
| Core Architecture | 32-bit |
| Product Type | General purpose microcontroller |
Guia de Configuração de Pinos do STM32C531CBU6 48-ufqfpn (7x7 mm)
Configuração de pinos para STM32C531CBU6 (pacote 48-ufqfpn (7x7 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para STM32C531CBU6.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
STM32C531CBU6 é adequado para 6 aplicaçãos: Industrial Sensor Nodes, Motor Control (BLDC/PMSM), Consumer Appliances, IoT Endpoints, Building Automation, Medical & Health Monitoring Devices.
Industrial Sensor Nodes
The STM32C531CBU6 fits industrial sensor nodes because its native I3C interface provides a modern two-wire bus for next-generation smart sensors while remaining backward-compatible with legacy I2C devices, and its 144 MHz Cortex-M33 with hardware FPU executes local filtering and linearization in hardware-accelerated floating point. In a typical node, the MCU aggregates data from multiple I3C/I2C sensors, applies calibration math, and forwards results over industrial links using its USART/SPI peripherals. The 128 KB flash holds the sensing firmware plus a lightweight protocol stack, and the 64 KB RAM buffers sample streams without external memory. Its 40 nm process delivers low active power for bus-powered or energy-harvesting nodes.
Recomendado
Motor Control (BLDC/PMSM)
For cost-sensitive motor drives in appliances, fans, and pumps, the STM32C531CBU6's 144 MHz Cortex-M33 core with single-precision FPU runs field-oriented control (FOC) loops efficiently - the FPU eliminates slow fixed-point math for Park/Clarke transforms and PI regulators. STM32C5 series timers generate complementary PWM outputs with dead-time insertion for three-phase inverters, per the ST datasheet family description. The 128 KB flash accommodates an FOC stack plus communication (UART-based command interfaces), and the 64 KB RAM holds current-sampling buffers. Because the MCU is a general-purpose mainstream part, it also integrates housekeeping functions such as fault logging and host communication in the same chip, reducing system BOM cost.
Recomendado
Consumer Appliances
The STM32C531CBU6 targets cost-sensitive consumer appliance controls - washing machines, air conditioners, cooktops, and small kitchen devices - where ST describes the STM32C5 series as balancing high performance, low power, and security. The 144 MHz Cortex-M33 delivers responsive UI handling (buttons, encoders, display refresh) while simultaneously running motor or heater control loops using the hardware FPU. The 128 KB flash and 64 KB RAM are sized for appliance firmware including safety monitoring and communication with home networks. The 48-UFQFPN 7x7 mm package with 0.5 mm pitch keeps the control PCB compact and assembly-friendly, and the mainstream STM32 toolchain (STM32CubeMX, HAL) shortens development cycles for appliance OEMs.
Recomendado
IoT Endpoints
In IoT endpoint designs, the STM32C531CBU6 serves as the main application controller interfacing to wireless connectivity modules over UART/SPI. Its I3C interface is specifically valuable for the newest generation of environmental and motion sensors that adopt the I3C standard, giving higher throughput and in-band interrupts versus I2C. The 144 MHz core with FPU handles protocol processing (MQTT/CoAP formatting, TLS-adjacent preprocessing) and sensor fusion locally. The 128 KB flash fits a FreeRTOS-based application with a communication stack; the 64 KB RAM buffers packets. ST's 40 nm process keeps active and standby power low for battery-operated deployments, and the Cortex-M33's security architecture supports secure boot strategies in the STM32 ecosystem.
Recomendado
Building Automation
Building automation nodes - damper actuators, occupancy controllers, HVAC zone controllers, and lighting interfaces - benefit from the STM32C531CBU6's combination of mainstream pricing and 144 MHz Cortex-M33 performance. The I3C/I2C bus connects occupancy, temperature, and humidity sensors; timers drive actuator PWM; and USART/SPI links handle RS-485-style or module-based network communication. The hardware FPU accelerates PID control loops for HVAC regulation at high sampling rates. With 128 KB flash and 64 KB RAM, a single chip holds the control application, network stack, and diagnostic logging. The 48-UFQFPN package suits the compact, cost-driven PCBs typical of field-installed automation devices, and ST's long-lifecycle MCU policies support multi-year building deployments.
Recomendado
Medical & Health Monitoring Devices
Portable health and wellness monitors - vital-sign trackers, digital thermometry front ends, and home diagnostic accessories - use the STM32C531CBU6 where its hardware single-precision FPU processes biopotential and physiological signal math (filtering, FFT-based feature extraction) efficiently at 144 MHz. The I3C interface connects next-generation low-power biosensors while remaining compatible with existing I2C parts, simplifying multi-sensor designs. The 128 KB flash and 64 KB RAM support data buffering and local analytics without external memory, important for small, battery-powered enclosures. ST's 40 nm process reduces active current, extending battery life, and the mainstream Cortex-M33 ecosystem provides libraries for low-power modes and security features relevant to health-data handling. Verify regulatory qualification requirements for the final medical product separately.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32C531CBU6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32C531CCU6 | STM32C511CBU6 | STM32C511C8U6 | STM32C531CBT6 |
|---|---|---|---|---|---|
| Package | 48-UFQFPN (7x7) | 48-UFQFPN (7x7) - same | 48-UFQFPN (7x7) - same | 48-UFQFPN (7x7) - same | 48-UFQFPN (7x7) footprint equivalent (LQFP-48 body variant) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Arm Cortex-M33F @ 144 MHz | Arm Cortex-M33F @ 144 MHz | Arm Cortex-M33 (same family) | Arm Cortex-M33 (same family) | Arm Cortex-M33F @ 144 MHz (identical die) |
| Flash | 128 KB | 256 KB | 128 KB | 64 KB | 128 KB |
| Family / Process | STM32C53xxx, 40 nm | STM32C53xxx, 40 nm | STM32C51xxx family | STM32C51xxx family | STM32C53xxx, 40 nm |
| Relative Cost Position | Mid (mainstream 128 KB tier) | Higher (256 KB tier) | Lower (cost-down variant) | Lowest (64 KB tier) | Comparable |
Principais diferenciais
- I3C interface for next-generation sensor buses (vs STM32C511CBU6)
- Larger flash within the same footprint (vs STM32C511C8U6)
- Lower cost than the flash-upgraded variant (vs STM32C531CCU6)
Notas de projeto
The 48-UFQFPN 7x7 mm package has a 0.5 mm pitch and a central exposed pad. Connect the exposed pad to a solid ground plane with an array of thermal vias - this is the primary ground return and thermal path. Use the official ST UFQFPN-48 land pattern; avoid shrinking pads for hand assembly. Confirm all pin assignments with STM32CubeMX and the STM32C531 datasheet pinout table before routing, since peripheral multiplexing varies across the family.
Estimated: supply decoupling for STM32 MCUs follows ST hardware getting-started guidance - place 100 nF ceramic capacitors at each VDD pin pair as close to the pins as possible, plus bulk capacitance of a few uF per rail. Verify the exact VDD pin count, voltage range, and any VDDA/VCAP requirements from the STM32C531 datasheet, since the specific power architecture was not present in the verified data used for this page.
Do not assume cross-family pin compatibility: STM32C511 and STM32C531 share the 48-UFQFPN footprint but differ in peripheral multiplexing, so firmware and possibly some net assignments must be re-verified when swapping family members. Second, the I3C peripheral is only on the STM32C531 tier per ST marketing material - confirm availability before designing a sensor bus that depends on it. Finally, re-check the datasheet revision at st.com before tape-out, as the STM32C5 series is a recent product line with evolving errata.
Informações de conformidade
Compliance status was not present in the verified web data retrieved for this part. STMicroelectronics mainstream STM32 products are typically RoHS-compliant, but this must be confirmed on the official ST product page before use in regulated designs.
