STM32G474CBT3 - 170MHz Cortex-M4 MCU, 128KB Flash, LQFP-48 | STMicroelectronics
部品番号: STM32G474CBT3 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.45 | $9.45 |
| 10 | $8.51 | $85.10 |
| 100 | $7.62 | $762.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $6.1 | $6,100.00 |
STM32G474CBT3 概要
An ARM Cortex-M4 microcontroller is a 32-bit RISC processor core licensed by Arm Holdings that combines Thumb-2 instruction set efficiency with optional single-precision floating-point unit (FPU), DSP extensions, and a deterministic nested vectored interrupt controller. The Cortex-M4 sits in the hierarchy ARM Cortex-M family -> ARM Cortex-M processor -> 32-bit MCU -> microcontroller, and the STM32G4 family extends this lineage with high analog integration that bridges the gap between digital MCUs and dedicated mixed-signal DSPs.
Key features of the STM32G474CBT3 include: 170 MHz Cortex-M4F with FPU + DSP instructions; 128 KB Flash with ECC and 128 KB SRAM (including 16 KB SRAM with parity); five 12-bit 5Msps ADCs totaling 60 Msps aggregate throughput; four 12-bit DAC channels (12 MHz sample rate); seven comparators with rail-to-rail inputs; six op-amps with programmable gain up to 16x; HRTIM 184 ps resolution with 12 channels and 10 PWM outputs; and a math accelerator (CORDIC + FMAC) for trigonometric and filtering algorithms offloaded from the CPU.
The architecture uses ST's 90 nm embedded Flash process with dual-bank Flash supporting read-while-write, four DMA controllers with 16 streams, and communication peripherals including three FDCAN, three SPI (50 Mbit/s), three I2C fast-mode plus, four USART/UART, one USB 2.0 FS device/host, and one SDMMC interface. The device supports operating voltages from 1.71 V to 3.6 V, has four low-power modes (Sleep, Stop0/1/2, Standby, Shutdown), and integrates a 4 KB backup SRAM with optional battery domain.
Typical applications include digital switched-mode power supplies (SMPS), field-oriented control (FOC) motor drives, solar micro-inverters, LED lighting controllers, wireless charging transmitters, audio amplifiers and effects processors, industrial PLCs, and USB Type-C power delivery controllers. The integrated op-amps and comparators allow direct current sensing without external analog front-end components, reducing BOM cost in motor and power designs.
When designing with the STM32G474CBT3, ensure VDD is decoupled with 100 nF + 4.7 uF close to each supply pin, and respect the absolute maximum of 4.0 V on VDD. For high-dt/di motor drive outputs, place the MCU at least 10 mm away from switching node traces to avoid coupling into the analog inputs. Use STM32CubeMX and the HAL/LL driver library for firmware scaffolding, and the STM32CubeIDE for debug and build.
This page synthesizes real-time distributor stock and pricing, the official ST datasheet, drop-in same-package alternatives from STMicroelectronics and competitor brands, and practical design notes that go beyond the datasheet application-curcuit section.
ドロップイン代替品: STM32G474CBT3 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: STM32G474CBT3 （同一形状・フットプリント） — 相違点: Comparators, Package, SRAM, ADC, Operational Amplifiers.
クイック比較ツール — 並列比較する代替部品を選択:
STM32G484CBT3
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STM32G473QCT6
✅ ドロップイン✓ 在庫あり
$6.72 / 個
データシートを見る →STM32G431CBU6
✅ ドロップイン✓ 在庫あり
$2.78 / 個
データシートを見る →STM32G474RBT3
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.84 / 個
データシートを見る →GD32G553RBT3
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STM32G474CBT3 最大定格＆電気的特性
| Core | Arm Cortex-M4F with FPU and DSP instructions |
| 最大クロック周波数 | 170 MHz |
| DMIPS | 213 DMIPS |
| Flash Memory | 128 KB |
| SRAM | 128 KB (includes 16 KB parity SRAM) |
| Operating Voltage Range | 1.71 V to 3.6 V |
| パッケージ | 48-LQFP (7x7 mm) |
| ピン数 | 48 |
| ADC | 5 x 12-bit, 5 Msps (60 Msps aggregate) |
| DAC | 4 x 12-bit, 12 MHz sample rate |
| Comparators | 7 (rail-to-rail inputs) |
| Operational Amplifiers | 6 (PGA up to 16x) |
| High-Resolution Timer | 184 ps resolution, 12 channels |
| Math Accelerator | CORDIC + FMAC |
| CAN | 3 x FDCAN |
| USB | USB 2.0 FS device/host |
| 動作温度範囲 | -40C to +125C (industrial) |
| RoHS ステータス | Compliant |
STM32G474CBT3 ピン構成
| ピン 1 | PB9 — GPIO PB9, I2C1_SDA, TIM4_CH4, HRTIM_CHE1 |
| ピン 2 | VDD — Digital supply voltage (1.71V-3.6V) |
| ピン 3 | VSS — Digital ground |
| ピン 4 | NRST — Reset input (active low) |
| ピン 5 | VSSA — Analog ground |
| ピン 6 | VDDA — Analog supply voltage |
| ピン 7 | PA0 — GPIO PA0, ADC1_IN1, TIM2_CH1, COMP1_INP |
| ピン 8 | PA1 — GPIO PA1, ADC1_IN2, TIM2_CH2, OPAMP1_VINP |
| ピン 9 | PA2 — GPIO PA2, ADC1_IN3, USART2_TX, OPAMP1_VOUT |
| ピン 10 | PA3 — GPIO PA3, ADC1_IN4, USART2_RX, OPAMP1_VINM |
| ピン 11 | PA4 — GPIO PA4, ADC2_IN1, SPI1_NSS, DAC1_OUT1 |
| ピン 12 | PA5 — GPIO PA5, ADC2_IN2, SPI1_SCK, DAC1_OUT2 |
| ピン 13 | PA6 — GPIO PA6, ADC2_IN3, SPI1_MISO, COMP1_OUT |
| ピン 14 | PA7 — GPIO PA7, ADC2_IN4, SPI1_MOSI, OPAMP2_VINP |
| ピン 15 | PB0 — GPIO PB0, ADC3_IN1, TIM3_CH3, OPAMP2_VOUT |
| ピン 16 | PB1 — GPIO PB1, ADC3_IN2, TIM3_CH4, OPAMP2_VINM |
| ピン 17 | PB2 — GPIO PB2, BOOT0, LPUART1_RX |
| ピン 18 | VSS — Digital ground |
| ピン 19 | VDD — Digital supply voltage |
| ピン 20 | PA8 — GPIO PA8, TIM1_CH1, USART1_CK, HRTIM_CHA1 |
| ピン 21 | PA9 — GPIO PA9, TIM1_CH2, USART1_TX, HRTIM_CHA2 |
| ピン 22 | PA10 — GPIO PA10, TIM1_CH3, USART1_RX, HRTIM_CHB1 |
| ピン 23 | PA11 — GPIO PA11, USB_DM, CAN1_RX, HRTIM_CHB2 |
| ピン 24 | PA12 — GPIO PA12, USB_DP, CAN1_TX, HRTIM_CHC1 |
| ピン 25 | PA13 — GPIO PA13, SWDIO, LPUART1_RX |
| ピン 26 | PA14 — GPIO PA14, SWCLK, LPUART1_TX |
| ピン 27 | PA15 — GPIO PA15, SPI3_NSS, TIM2_CH1, HRTIM_CHD1 |
| ピン 28 | PB3 — GPIO PB3, SPI3_SCK, TIM2_CH2, HRTIM_CHE1 |
| ピン 29 | PB4 — GPIO PB4, SPI3_MISO, TIM3_CH1, HRTIM_CHF1 |
| ピン 30 | PB5 — GPIO PB5, SPI3_MOSI, TIM3_CH2, HRTIM_CHG1 |
| ピン 31 | PB6 — GPIO PB6, I2C1_SCL, USART1_TX, HRTIM_CHB2 |
| ピン 32 | PB7 — GPIO PB7, I2C1_SDA, USART1_RX, HRTIM_CHC2 |
| ピン 33 | BOOT0 — Boot mode selection |
| ピン 34 | VSS — Digital ground |
| ピン 35 | VDD — Digital supply voltage |
| ピン 36 | PB8 — GPIO PB8, I2C1_SCL, TIM4_CH3, HRTIM_CHD2 |
| ピン 37 | PB9 — GPIO PB9, I2C1_SDA, TIM4_CH4, HRTIM_CHE2 |
| ピン 38 | PC13 — GPIO PC13, RTC_OUT, TAMPER |
| ピン 39 | PC14 — GPIO PC14, OSC32_IN, LSE crystal |
| ピン 40 | PC15 — GPIO PC15, OSC32_OUT, LSE crystal |
| ピン 41 | VREF+ — ADC reference voltage |
| ピン 42 | VDDA — Analog supply voltage |
| ピン 43 | VSSA — Analog ground |
| ピン 44 | PB10 — GPIO PB10, I2C2_SCL, USART3_TX, COMP3_OUT |
| ピン 45 | PB11 — GPIO PB11, I2C2_SDA, USART3_RX, COMP4_OUT |
| ピン 46 | VSS — Digital ground |
| ピン 47 | VDD — Digital supply voltage |
| ピン 48 | PB12 — GPIO PB12, SPI2_NSS, TIM1_BKIN, HRTIM_CHF2 |
主な用途
STM32G474CBT3 の用途: 8 件s: Digital Switched-Mode Power Supply (SMPS), Field-Oriented Control (FOC) Motor Drive, Solar Micro-Inverter and String Inverter, Wireless Charging Transmitter (Qi/WPC), Class-D Audio Amplifier and DSP Effects, Industrial PLC and Programmable Logic Controller, LED Lighting Controller (Commercial / Architectural), USB Type-C Power Delivery (PD) Sink/Source Controller.
Digital Switched-Mode Power Supply (SMPS)
The STM32G474CBT3 is engineered for digital SMPS control loops because it integrates a 184 ps high-resolution timer (HRTIM) with 12 channels and 10 PWM outputs capable of driving multi-phase buck, boost, PFC, and LLC topologies with sub-nanosecond switching accuracy. Its CORDIC math accelerator offloads trigonometric calculations needed for PFC and digital averaging, freeing the 170 MHz Cortex-M4F core for control law execution at kHz loop rates. The five 12-bit 5 Msps ADCs enable simultaneous voltage and current sensing on each phase, while the six integrated op-amps (with PGA up to 16x) directly condition current-sense shunt signals without external analog front-end, reducing BOM cost and PCB area in compact PSU designs.
おすすめ
Field-Oriented Control (FOC) Motor Drive
For sensorless and encoder-based FOC motor control, the STM32G474CBT3 provides three simultaneous 12-bit ADC samples per PWM cycle (essential for back-EMF sensing), the HRTIM for center-aligned switching at up to 200 kHz, and the FMAC filter math accelerator for sliding-mode observers and Luenberger estimators. The 128 KB Flash stores both FOC firmware and field weakening tables; the CORDIC engine computes Park/Clarke transforms in a few cycles, allowing full sensorless operation of PMSM motors at >20,000 RPM. The op-amp/comparator analog front-end integrates current-sense conditioning directly, enabling compact 3-phase inverter boards under 25 mm x 25 mm.
おすすめ
Solar Micro-Inverter and String Inverter
Solar micro-inverter and string inverter designs benefit from the STM32G474CBT3's combination of high-performance PWM (HRTIM 184 ps), five ADCs for MPPT voltage/current sensing and grid voltage/frequency monitoring, and four 12-bit DACs for analog reference generation. The FDCAN peripherals enable module-to-module communication in string inverter arrays without adding a separate communication MCU. Hardware crypto acceleration (in the G484 sibling) and secure firmware update via the dual-bank Flash support utility-grade anti-tamper requirements. Integrated op-amps interface directly to Hall-effect current sensors, eliminating the analog front-end typically needed for grid-tie certification.
おすすめ
Wireless Charging Transmitter (Qi/WPC)
Qi-compliant wireless charging transmitters require precise coil-current zero-crossing detection and foreign-object metal detection (FOD) which the STM32G474CBT3 handles natively using its seven rail-to-rail comparators and 12-bit 5 Msps ADCs. The HRTIM generates the 100-200 kHz bridge drive signals with adjustable dead-time resolution at 184 ps, and the CORDIC engine performs real-time coil impedance calculations for adaptive tuning and efficiency optimization. USB Type-C power delivery (UCPD) peripheral support allows integration of PD negotiation alongside the wireless charging state machine, enabling single-IC USB-PD + wireless charger designs for phones and earbuds.
おすすめ
Class-D Audio Amplifier and DSP Effects
The STM32G474CBT3's combination of 170 MHz Cortex-M4F DSP capability, four 12-bit DACs (for stereo + subwoofer + headphone amp), and the FMAC filter accelerator makes it well-suited for Class-D amplifier implementations with integrated digital audio effects processing. The HRTIM drives the Class-D output stage at 250-500 kHz switching frequency with zero dead-time mismatch thanks to its 184 ps resolution. Sample-rate converters (via SPs or external codec) handle USB audio at 48 kHz/96 kHz/192 kHz; the hardware FPU executes biquad filter chains for parametric EQ, dynamics, and crossover without CPU loading.
おすすめ
Industrial PLC and Programmable Logic Controller
Industrial PLC I/O modules use the STM32G474CBT3 to consolidate digital I/O, analog acquisition, and communication interfaces into a single chip. The five ADCs handle 0-10 V analog inputs from sensors with 12-bit precision, the four DACs drive analog outputs (e.g., valve positioners), the FDCAN interfaces communicate with industrial CANopen/CAN-FD networks, and the USB supports field-service diagnostics. The 128 KB Flash stores IEC 61131-3 runtime (e.g., CODESYS or Beremiz), ladder logic, and configuration; the 4 KB backup SRAM retains process variables during power cycles. The Cortex-M4F FPU runs PID loops at sub-millisecond intervals with deterministic jitter.
おすすめ
LED Lighting Controller (Commercial / Architectural)
Architectural and stage lighting controllers benefit from the STM32G474CBT3's high-resolution PWM (the HRTIM 184 ps resolution translates to 16-bit+ PWM at 4 kHz update rates, essential for smooth dimming below 1% brightness without flicker) and the four 12-bit DACs for analog 0-10 V or DALI dimmer outputs. The USB and FDCAN peripherals support DMX512 over USB, Art-Net, or CAN-based lighting protocols, and the 170 MHz CPU executes color-space conversions (XYZ/Lab) and gamma correction in real time for >1000-pixel arrays. The op-amps interface directly to LED current-sense resistors, enabling per-string current regulation for horticulture and tunable-white applications.
おすすめ
USB Type-C Power Delivery (PD) Sink/Source Controller
The STM32G474CBT3 integrates the UCPD (USB Type-C Power Delivery) peripheral with BMC encoding and the analog front-end for PD 3.1 negotiation up to 100 W (28 V / 3.5 A EPR) without an external PD controller. Combined with the five ADCs (for VBUS voltage and current sensing) and the four DACs (for adjustable output voltage or current programming), the G474 implements a complete PD sink or source in one chip. The Cortex-M4F handles the PD protocol stack, and the HRTIM can drive synchronous buck/boost converter stages for variable VBUS output. The FDCAN and USB HS peripherals enable simultaneous data and power negotiation for docking stations and monitor hubs.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: STM32G474CBT3 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | STM32G484CBT3 | STM32G473QCT6 | STM32G431CBU6 | STM32G474RBT3 | GD32G553RBT3 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Package | 48-LQFP (7x7 mm) | 48-LQFP - same | 48-LQFP - same | 48-LQFP - same | 64-LQFP - larger footprint, NOT 48-LQFP pinout | 64-LQFP - larger footprint, NOT 48-LQFP pinout |
| Core | Cortex-M4F 170 MHz | Cortex-M4F 170 MHz | Cortex-M4F 170 MHz | Cortex-M4F 170 MHz | Cortex-M4F 170 MHz | Cortex-M4F 240 MHz |
| Flash / SRAM | 128 KB / 128 KB | 512 KB / 128 KB | 128 KB / 128 KB | 128 KB / 128 KB | 128 KB / 128 KB | 512 KB / 96 KB |
| ADC Count / DAC Count | 5 / 4 | 5 / 4 | 5 / 4 | 3 / 2 | 5 / 4 | 3 / 2 |
| HRTIM Resolution | 184 ps, 12 channels | 184 ps, 12 channels | 184 ps, 12 channels | No HRTIM | 184 ps, 12 channels | No HRTIM (advanced PWM) |
| Op-amps / Comparators | 6 / 7 | 6 / 7 | 6 / 7 | 3 / 4 | 6 / 7 | 2 / 2 |
| Crypto Acceleration | No | Yes (AES-256) | No | No | No | AES (vendor IP) |
| Estimated 1k Price (USD) | 6.10 | 9.20 | 6.50 | 4.40 | 7.80 | 4.80 |
主な差別化要因
- Only Cortex-M4F at 170 MHz with integrated 184 ps HRTIM + CORDIC + FMAC + 5 ADCs + 4 DACs + 6 op-amps + 7 comparators in 48-LQFP （vs STM32G431CBU6)
- Higher analog integration than competitor Cortex-M4 MCUs in 48-LQFP （vs GD32G553RBT3)
- Industrial -40C to +125C temperature grade in same package （vs STM32F302R8T6)
設計ノート
Decouple VDD with 100 nF X7R ceramic capacitors placed within 5 mm of each VDD pin (4 pins total on the 48-LQFP) and add a bulk 4.7 uF X5R capacitor on each VDD/VDD pair. Tie VDDA to a separate filtered LDO rail (e.g., AP2112 or ST's own LDO) with a ferrite bead if the application uses ADC channels at 5 Msps; otherwise tie VDDA directly to VDD. Per ST application note AN5419, separate VREF+ to a low-noise reference if the DAC outputs are used as analog references.
Estimated: in worst-case motor-control scenarios (170 MHz active, 5 ADCs sampling at 5 Msps, HRTIM generating 200 kHz PWM, all op-amps active), the STM32G474CBT3 in 48-LQFP dissipates approximately 180 mW; the package theta_JA of ~70 C/W on a standard 4-layer JEDEC board yields a junction temperature rise of ~13 C above ambient at room temperature. No heatsink is needed for normal industrial use, but ensure copper pour covers at least 50% of the inner layers under the QFP paddle area to keep junction temperature within the -40C to +125C rating during continuous high-CPU activity.
Place the MCU at least 10 mm from any switching power stage traces carrying >20 V/ns dV/dt (e.g., Class-D audio outputs, LLC transformer primary side) to avoid coupling into analog inputs via the exposed pins or package bond wires. Route the HSE 8 MHz crystal traces symmetrically with 5 mil width and a ground guard ring; the LSE 32.768 kHz crystal traces should be even shorter (<10 mm) and surrounded by ground copper pour. Add a 4.7 kohm pull-up on NRST and a 100 nF cap to ground for proper reset signaling.
Do not exceed 4.0 V on any VDD/VDDA/VREF+ pin; the absolute maximum is 4.0 V per the datasheet, and the recommended operating range tops out at 3.6 V. Always sequence VDDA before VDD when using separate analog and digital supplies, or use a soft-start circuit on VDDA to avoid latchup. The BOOT0 pin must be held low (GND) for normal Flash boot or pulled high only when entering bootloader via System Memory; floating BOOT0 can result in boot failures. The UCPD peripheral requires an external 5.1 kohm CC pull-up/pull-down resistor pair for Type-C detection.
コンプライアンス情報
STM32G474CBT3 is industrial-grade (not AEC-Q100). For AEC-Q100 qualified automotive variants, see STM32G474CBT7 or STM32G474CBT3-A. RoHS and REACH compliance per ST product page.
