STM32F446RET6 - 180MHz Cortex-M4 MCU, 512KB Flash | STMicroelectronics
N.º da peça: STM32F446RET6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $13.11 | $13,11 |
| 10 | $11.98 | $119,80 |
| 100 | $10.85 | $1.085,00 |
| 500 | $9.72 | $4.860,00 |
| 1.000 | $8.94 | $8.940,00 |
STM32F446RET6 Visão geral
A microcontroller (MCU) is a compact integrated circuit that governs a specific operation in an embedded system, combining a processor core, memory, and programmable I/O peripherals on a single chip. The STM32F446RET6 belongs to the STM32F4 series, part of the broader STM32 family of 32-bit ARM Cortex-M microcontrollers. Within this hierarchy it sits in the high-performance Cortex-M4 class, whose DSP instructions and single-precision FPU make it well suited to real-time signal processing and closed-loop control.
Key features include 512 KB Flash with 128 KB system SRAM plus 4 KB backup SRAM, a rich analog subsystem with three 12-bit ADCs and two 12-bit DACs, and 14 timers (12x 16-bit and 2x 32-bit). Communication coverage is broad: SPI, I2C, USART, CAN, USB OTG FS/HS, SDIO, and an 8080/6800 LCD parallel interface. A true random number generator, camera interface (DCMI), and memory protection unit extend its security and imaging capability.
Technically, the device operates from a 1.7V to 3.6V supply and uses flexible clocking: external crystal (HSE), internal RC oscillators (HSI/LSI), and PLL multiplication to reach the full 180 MHz core clock. The Cortex-M4 NVIC and MPU support deterministic real-time behavior, while the LQFP64 package provides 51 GPIO pins, many multiplexed to alternate functions.
Typical applications include motor control (FOC exploits the FPU and fast ADCs), industrial automation, digital audio processing (the F446 media-access line was designed for audio with I2S and PLLI2S), and IoT nodes requiring USB or CAN connectivity.
Design consideration: decouple all VDD/VDDA pins with 100 nF ceramics close to the pins, and route the HSE crystal with short traces and guard ground for stable 180 MHz operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the ST datasheet.
Alternativas drop-in para STM32F446RET6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32F446RET6 (mesmo formato e footprint) — diferindo em SRAM, Timers, Flash Memory, Package, Communication Interfaces.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32F446RET7
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32F446RCT6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32F405RGT6
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$6.75 / unidade
Ver ficha técnica →STM32F401RET6
✅ Drop-In✓ Em estoque
$9.8481 / unidade
Ver ficha técnica →STM32F411RET6
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$4.02 / unidade
Ver ficha técnica →STM32F446RET6 Classificações máximas e características elétricas
| Core Processor | ARM Cortex-M4 with FPU (single precision) |
| Core Size | 32-bit |
| Frequência máxima de clock | 180 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB (plus 4 KB backup SRAM) |
| Supply Voltage Range | 1.7 V to 3.6 V |
| Number of ADCs | 3 x 12-bit |
| Number of DACs | 2 x 12-bit |
| Timers | 12 x 16-bit, 2 x 32-bit |
| Communication Interfaces | SPI, I2C, USART, CAN, USB OTG, SDIO |
| GPIO Count | 51 |
| Encapsulamento | 64-LQFP (10 x 10 mm) |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40C to +85C |
| Additional Peripherals | RNG, DCMI camera interface, LCD parallel interface (8080/6800), MPU |
| Nível MSL | MSL 3 |
| Status RoHS | Compliant |
Configuração de pinos do STM32F446RET6
| Pino 1 | VBAT — Battery backup supply for RTC and backup registers |
| Pino 2 | PC13 — GPIO / RTC functions |
| Pino 3 | PC14-OSC32_IN — GPIO or 32.768 kHz crystal input |
| Pino 4 | PC15-OSC32_OUT — GPIO or 32.768 kHz crystal output |
| Pino 5 | PH0-OSC_IN — HSE crystal input / GPIO |
| Pino 6 | PH1-OSC_OUT — HSE crystal output / GPIO |
| Pino 7 | NRST — System reset (active low) |
| Pino 8 | PC0 — GPIO / ADC1_IN10 |
| Pino 9 | PC1 — GPIO / ADC1_IN11 |
| Pino 10 | PC2 — GPIO / ADC1_IN12 |
| Pino 11 | PC3 — GPIO / ADC1_IN13 |
| Pino 12 | VSSA — Analog ground |
| Pino 13 | VREF- — ADC reference negative |
| Pino 14 | VREF+ — ADC reference positive |
| Pino 15 | VDDA — Analog power supply |
| Pino 16 | PA0-WKUP — GPIO / ADC / Wakeup |
| Pino 17 | PA1 — GPIO / ADC / Timer |
| Pino 18 | PA2 — GPIO / USART2_TX / ADC |
| Pino 19 | PA3 — GPIO / USART2_RX / ADC |
| Pino 20 | VSS — Digital ground |
| Pino 21 | VDD — Digital power supply |
| Pino 22 | PA4 — GPIO / DAC_OUT1 / SPI1_NSS |
| Pino 23 | PA5 — GPIO / DAC_OUT2 / SPI1_SCK |
| Pino 24 | PA6 — GPIO / SPI1_MISO / ADC |
| Pino 25 | PA7 — GPIO / SPI1_MOSI / ADC |
| Pino 26 | PC4 — GPIO / ADC1_IN14 |
| Pino 27 | PC5 — GPIO / ADC1_IN15 |
| Pino 28 | PB0 — GPIO / ADC / Timer |
| Pino 29 | PB1 — GPIO / ADC / Timer |
| Pino 30 | PB2 — GPIO / BOOT1 |
| Pino 31 | PB10 — GPIO / I2C2_SCL / USART3_TX |
| Pino 32 | VCAP_1 — Core regulator capacitor 1 (2.2 uF to VSS) |
| Pino 33 | VCAP_2 — Core regulator capacitor 2 (2.2 uF to VSS) |
| Pino 34 | PB12 — GPIO / SPI2_NSS / CAN2 related |
| Pino 35 | PB13 — GPIO / SPI2_SCK |
| Pino 36 | PB14 — GPIO / SPI2_MISO |
| Pino 37 | PB15 — GPIO / SPI2_MOSI |
| Pino 38 | PC6 — GPIO / USART6_TX / SDIO |
| Pino 39 | PC7 — GPIO / USART6_RX / SDIO |
| Pino 40 | PC8 — GPIO / SDIO_D0 |
| Pino 41 | PC9 — GPIO / SDIO_D1 / I2C3_SDA |
| Pino 42 | PA8 — GPIO / MCO1 / I2C3_SCL / USB_OTG_SOF |
| Pino 43 | PA9 — GPIO / USART1_TX / USB_VBUS |
| Pino 44 | PA10 — GPIO / USART1_RX / USB_OTG_ID |
| Pino 45 | PA11 — GPIO / USB_OTG_FS_DM / CAN1_RX |
| Pino 46 | PA12 — GPIO / USB_OTG_FS_DP / CAN1_TX |
| Pino 47 | PA13 — GPIO / SWDIO (debug) |
| Pino 48 | VSS — Digital ground |
| Pino 49 | VDD — Digital power supply |
| Pino 50 | PA14 — GPIO / SWCLK (debug) |
| Pino 51 | PA15 — GPIO / SPI1_NSS / JTDI |
| Pino 52 | PC10 — GPIO / SDIO_D2 / USART3 related |
| Pino 53 | PC11 — GPIO / SDIO_D3 / USART3 related |
| Pino 54 | PC12 — GPIO / SDIO_CK / USART3_CK |
| Pino 55 | PD2 — GPIO / SDIO_CMD / USART3_RX |
| Pino 56 | PB3 — GPIO / SPI1_SCK / JTDO |
| Pino 57 | PB4 — GPIO / SPI1_MISO / NJTRST |
| Pino 58 | PB5 — GPIO / SPI1_MOSI / CAN2 related |
| Pino 59 | PB6 — GPIO / I2C1_SCL / USART1_TX |
| Pino 60 | PB7 — GPIO / I2C1_SDA / USART1_RX |
| Pino 61 | BOOT0 — Boot mode select (tie via resistor to VSS for flash boot) |
| Pino 62 | PB8 — GPIO / I2C1_SCL / CAN1 related |
| Pino 63 | PB9 — GPIO / I2C1_SDA / CAN2 related |
| Pino 64 | VSS — Digital ground |
Aplicações típicas
STM32F446RET6 é adequado para 6 aplicaçãos: Motor Control (FOC), Digital Audio Processing, Industrial Automation Nodes, IoT and Connected Devices, Consumer Electronics and HMI, Test and Measurement Instruments.
Motor Control (FOC)
The STM32F446RET6 fits field-oriented motor control because its 180 MHz Cortex-M4 with hardware FPU executes Clarke/Park transforms and PI current loops in single-cycle floating-point math. Three 12-bit ADCs sample two or three phase currents simultaneously, while advanced timers generate complementary PWM with hardware dead-time insertion. In a typical servo drive the MCU runs a 10-20 kHz current loop with margins to spare, and the CAN interface links to the plant network. Trade-off: for designs needing only 256 KB flash, the pin-compatible STM32F446RCT6 cuts cost without layout change.
Recomendado
Digital Audio Processing
The STM32F446 belongs to ST's media-access line and is explicitly optimized for audio: the PLLI2S generates precise audio clocks, two I2S peripherals handle multi-protocol serial audio, and the 180 MHz FPU executes EQ, FIR/IIR filtering, and effects in real time. A typical USB audio class device uses USB OTG FS at 12 Mbps with the DAC channels or external codecs for output, achieving 24-bit/192 kHz pipelines. The dual 12-bit DACs cover monitor outputs directly. Trade-off: switching noise from USB demands careful VDDA filtering to keep the audio noise floor low.
Recomendado
Industrial Automation Nodes
In factory automation, the STM32F446RET6 serves as a smart sensor or actuator node combining CAN 2.0B for fieldbus communication, multiple USARTs for legacy RS-485 links, and 12-bit ADCs for local measurement. Its -40C to +85C industrial temperature range and MSL 3 moisture rating suit panel-mounted electronics, and the MPU plus RNG support secure firmware update schemes. With 512 KB Flash there is headroom for protocol stacks plus OTA updaters. Trade-off: for functional-safety rated drives, ST's SPC5 automotive line offers certified alternatives instead.
Recomendado
IoT and Connected Devices
For IoT endpoints, the STM32F446RET6 provides USB OTG for direct PC connectivity, SDIO for local logging to microSD cards, and enough 180 MHz throughput to run TLS stacks and JSON parsing alongside application logic. Low-power modes (Sleep, Stop, Standby) with the 4 KB backup SRAM preserve state across duty-cycled sleep periods, extending battery life in gateway-class nodes. A common architecture pairs the MCU with a Wi-Fi or BLE module over UART. Trade-off: for coin-cell-only designs, ST's STM32L4 ultra-low-power line is more appropriate than the F4 performance line.
Recomendado
Consumer Electronics and HMI
The STM32F446RET6 drives human-machine interfaces using its 8080/6800 LCD parallel interface for TFT panels and the DCMI camera interface for barcode or face-detection front ends. The 180 MHz core renders UI graphics and runs lightweight vision pre-processing, while the 51 GPIOs of the LQFP64 package handle touch, backlight PWM, and peripheral buses. USB OTG supports firmware update and PC commissioning in the field. Trade-off: for large displays with layered graphics, an STM32F7 or H7 with Chrom-ART accelerator offloads rendering more efficiently.
Recomendado
Test and Measurement Instruments
In bench instruments and data loggers, the STM32F446RET6 coordinates acquisition front ends using its three 12-bit ADCs at up to 2.4 Msps for triggered captures, while USB or UART streams results to a host. The 512 KB Flash stores calibration tables, and hardware timers generate precise stimulus signals or gate external counters. The FPU accelerates on-device FFT and averaging, reducing host round-trips. Trade-off: for RF-grade spectrum work, the ADC resolution and analog front end of the F446 are the limiting factor; pair it with a dedicated ADC for high-precision measurement chains.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32F446RET6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32F446RET7 | STM32F446RCT6 | STM32F405RGT6 | STM32F401RET6 |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core / Max Frequency | Cortex-M4F, 180 MHz | Cortex-M4F, 180 MHz | Cortex-M4F, 180 MHz | Cortex-M4F, 168 MHz | Cortex-M4F, 84 MHz |
| Flash Memory | 512 KB | 512 KB | 256 KB | 1 MB | 256 KB (datasheet variant dependent) |
| SRAM | 128 KB + 4 KB backup | 128 KB + 4 KB backup | 128 KB + 4 KB backup | 128 KB + 4 KB backup (datasheet variant dependent) | 64 KB (datasheet variant dependent) |
| 12-bit DAC Channels | 2 (dual DAC) | 2 | 2 | 2 | None |
| CAN Interface | Yes (2x bxCAN) | Yes | Yes | Yes | No |
| Operating Temperature | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C |
Principais diferenciais
- Media-optimized peripheral set (vs STM32F401RET6)
- Wider temperature drop-in option (vs STM32F446RET7)
- Flash density trade-off within same footprint (vs STM32F405RGT6)
Notas de projeto
Decouple every VDD pair (pins 20/21, 48/49) with 100 nF X7R ceramics placed within 2 mm of the pins, plus one 4.7 uF bulk capacitor per supply rail. VDDA (pin 15) should be filtered from VDD via a ferrite bead with its own 1 uF + 10 nF network, and VREF+ driven from a low-noise reference or filtered VDDA for best ADC accuracy. VCAP_1 and VCAP_2 (pins 32/33) each require 2.2 uF low-ESR ceramic to VSS placed directly adjacent - these stabilize the internal core regulator.
Keep the HSE crystal (pins 5/6) traces under 10 mm with guard ground on both sides and no other signals crossing underneath; at the full 180 MHz clock derived from the crystal, layout parasitics directly affect startup margin. BOOT0 (pin 61) must not float - use a 10 kOhm pulldown to VSS so the device boots from flash. Route SWDIO (pin 47) and SWCLK (pin 50) to a standard ARM 10-pin header for debug access even in production boards.
USB OTG FS operation requires VBUS sensing on PA9 per the USB spec - designs that hard-tie VBUS can fail enumeration with some hosts. When using the ADC at high sample rates, remember that VREF- (pin 13) must be tied to a clean analog ground, not digital ground beneath switching loads. MSL 3 rating means opened reels must be soldered within 168 hours or baked per J-STD-033 handling - a common cause of popcorn cracking in reflow.
Estimated: at 3.3 V and 180 MHz full-speed execution from flash with all peripherals active, core current is on the order of 50-60 mA (per ST datasheet typical consumption tables), giving roughly 200 mW dissipation - well within LQFP64 thermal limits without copper pours. For battery designs, Stop mode drops consumption to the microamp range; budget the 4 KB backup SRAM and RTC domain on VBAT if state retention across Standby is required.
Informações de conformidade
RoHS and REACH compliance per PartGenie compliance data. MSL 3 moisture sensitivity. Industrial-grade device - for automotive (AEC-Q100) applications use the SPC5 line instead.
