STM32L433RCT6 - Ultra-Low-Power ARM Cortex-M4 MCU | STMicroelectronics
MPN: STM32L433RCT6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
Drop-in alternatives for STM32L433RCT6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32L433RCT6TR
β Drop-Inπ Reference alternative (not in catalog)
STM32L433RCT7
β Drop-Inπ Reference alternative (not in catalog)
STM32L432RCT6
β Drop-Inπ Reference alternative (not in catalog)
STM32L476RGT6
β‘ Same Packageπ Reference alternative (not in catalog)
LPC845
β‘ Same Packageπ Reference alternative (not in catalog)
RA4M1
β‘ Same Packageπ Reference alternative (not in catalog)
STM32L433RCT6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU |
| Maximum Frequency | 80 MHz |
| Flash Memory | 256 KB |
| SRAM | 64 KB |
| Package | LQFP64 |
| Operating Voltage | 1.71 V to 3.6 V |
| Standby Current | 100 nA |
| ADC | 12-bit, 5 Msps, with hardware oversampling |
| DAC | 12-bit |
| Communication Interfaces | USART, SPI, I2C, USB |
| RTC | Yes |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| AEC-Q100 | Not qualified |
STM32L433RCT6 Pin Configuration
| Pin 1 | VBAT β Battery backup supply |
| Pin 2 | PC13 β GPIO / RTC tamper |
| Pin 3 | PC14 β GPIO / OSC32_IN |
| Pin 4 | PC15 β GPIO / OSC32_OUT |
| Pin 5 | PF0 β GPIO |
| Pin 6 | PF1 β GPIO |
| Pin 7 | NRST β Reset |
| Pin 8 | VDD β Power supply |
| Pin 9 | VSS β Ground |
| Pin 10 | VDDA β Analog power supply |
| Pin 11 | PA0 β GPIO / ADC |
| Pin 12 | PA1 β GPIO / ADC |
| Pin 13 | PA2 β GPIO / USART |
| Pin 14 | PA3 β GPIO / USART |
| Pin 15 | PA4 β GPIO / DAC |
| Pin 16 | PA5 β GPIO / DAC |
| Pin 17 | PA6 β GPIO / SPI |
| Pin 18 | PA7 β GPIO / SPI |
| Pin 19 | PA8 β GPIO / USB |
| Pin 20 | PA9 β GPIO / USB |
| Pin 21 | PA10 β GPIO / USART |
| Pin 22 | PA11 β GPIO / USB |
| Pin 23 | PA12 β GPIO / USB |
| Pin 24 | PA13 β SWDIO |
| Pin 25 | PA14 β SWCLK |
| Pin 26 | PA15 β GPIO / JTDI |
| Pin 27 | PB0 β GPIO / ADC |
| Pin 28 | PB1 β GPIO / ADC |
| Pin 29 | PB2 β GPIO |
| Pin 30 | PB3 β GPIO / SPI |
| Pin 31 | PB4 β GPIO / SPI |
| Pin 32 | PB5 β GPIO / I2C |
| Pin 33 | PB6 β GPIO / I2C |
| Pin 34 | PB7 β GPIO / I2C |
| Pin 35 | PB8 β GPIO / I2C |
| Pin 36 | PB9 β GPIO / I2C |
| Pin 37 | PB10 β GPIO / I2C |
| Pin 38 | PB11 β GPIO / I2C |
| Pin 39 | PB12 β GPIO / SPI |
| Pin 40 | PB13 β GPIO / SPI |
| Pin 41 | PB14 β GPIO / SPI |
| Pin 42 | PB15 β GPIO / SPI |
| Pin 43 | PC0 β GPIO / ADC |
| Pin 44 | PC1 β GPIO / ADC |
| Pin 45 | PC2 β GPIO / ADC |
| Pin 46 | PC3 β GPIO / ADC |
| Pin 47 | PC4 β GPIO / ADC |
| Pin 48 | PC5 β GPIO / ADC |
| Pin 49 | PC6 β GPIO / USART |
| Pin 50 | PC7 β GPIO / USART |
| Pin 51 | PC8 β GPIO / USART |
| Pin 52 | PC9 β GPIO / USART |
| Pin 53 | PC10 β GPIO / USART |
| Pin 54 | PC11 β GPIO / USART |
| Pin 55 | PC12 β GPIO / USART |
| Pin 56 | PD0 β GPIO / OSC_IN |
| Pin 57 | PD1 β GPIO / OSC_OUT |
| Pin 58 | PD2 β GPIO |
| Pin 59 | VDD β Power supply |
| Pin 60 | VSS β Ground |
| Pin 61 | PD3 β GPIO |
| Pin 62 | PD4 β GPIO |
| Pin 63 | PD5 β GPIO |
| Pin 64 | PD6 β GPIO |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32L433RCT6 is suitable for 6 applications: Smart Meters, Wearable Devices, Medical Monitoring Equipment, Industrial Sensors, IoT Nodes, Portable Audio Devices.
Smart Meters
The STM32L433RCT6 is ideal for smart meters due to its ultra-low-power operation and integrated ADC. In a typical smart meter, the MCU reads current and voltage sensors via the 12-bit ADC, processes the data using the Cortex-M4 core, and communicates via USART or wireless modules. Its low standby current ensures long battery life, and the wide operating voltage range accommodates various power supply designs. The device's multiple low-power modes allow the meter to sleep between measurements, significantly extending battery life in remote installations.
Recommended
Wearable Devices
For wearable devices like fitness trackers and smartwatches, the STM32L433RCT6 offers a perfect balance of performance and power efficiency. Its 80 MHz Cortex-M4 core can handle sensor fusion algorithms, while the 12-bit ADC interfaces with biometric sensors. The device's small LQFP64 package and low power consumption enable compact, battery-powered designs. The RTC and low-power modes allow the device to maintain time and wake up periodically for sensor readings, maximizing battery life. The integrated DAC can be used for audio alerts or haptic feedback control.
Recommended
Medical Monitoring Equipment
In medical monitoring devices such as portable ECG monitors and glucose meters, the STM32L433RCT6 provides reliable and accurate data acquisition. The 12-bit ADC with hardware oversampling ensures precise signal measurement, while the Cortex-M4 FPU accelerates digital signal processing for filtering and analysis. The device's low power consumption is critical for battery-operated medical devices that need to operate for extended periods. The multiple communication interfaces allow data transfer to displays or wireless modules for remote monitoring. The wide operating temperature range ensures reliable operation in clinical environments.
Recommended
Industrial Sensors
The STM32L433RCT6 is well-suited for industrial sensors that require low power and robust performance. Its 12-bit ADC can interface with various analog sensors, and the USART/SPI interfaces enable communication with industrial networks. The device's wide operating voltage range and temperature range make it suitable for harsh industrial environments. The low-power modes allow sensors to operate on battery power for years, reducing maintenance costs. The Cortex-M4 core with FPU can handle complex signal processing algorithms for condition monitoring and predictive maintenance.
Recommended
IoT Nodes
For IoT nodes, the STM32L433RCT6 offers ultra-low-power operation and multiple connectivity options. The device can wake up from standby mode via external interrupts or RTC alarms, send sensor data via SPI to a LoRa or BLE module, and return to sleep, achieving extremely low average power consumption. The 256 KB flash provides ample space for communication protocols and application code. The integrated USB interface allows for easy firmware updates and data logging. The device's small footprint and low cost make it ideal for mass-deployed IoT sensors.
Recommended
Portable Audio Devices
The STM32L433RCT6 can be used in portable audio devices such as MP3 players and voice recorders. Its 12-bit DAC can generate analog audio signals, and the Cortex-M4 core with FPU can handle audio decoding algorithms. The device's low power consumption is essential for battery-powered audio devices, and the I2S interface (if available) can connect to external audio codecs for higher quality. The USB interface allows for easy file transfer and charging. The device's small package enables compact designs.
Recommended
Recommended Products Summary
Engineering reference data for STM32L433RCT6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L433RCT6TR | STM32L433RCT7 | STM32L432RCT6 | STM32L476RGT6 | LPC845 | RA4M1 |
|---|---|---|---|---|---|---|---|
| Package | LQFP64 | LQFP64 - same | LQFP64 - same | LQFP64 - same | LQFP64 - same | LQFP64 - same | LQFP64 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Renesas Electronics |
| Core | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M0+ | ARM Cortex-M4 with FPU |
| Maximum Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 30 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 1 MB | 64 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB | 16 KB | 32 KB |
| Standby Current | 100 nA | 100 nA | 100 nA | 100 nA | 100 nA | 1 uA | 0.4 uA |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
Key Differentiators
- Ultra-low standby current of 100 nA (vs LPC845)
- Higher core frequency and FPU (vs RA4M1)
- Larger SRAM (vs RA4M1)
Design Notes
The STM32L433RCT6 operates from 1.71 V to 3.6 V. Use a low-dropout regulator (LDO) to provide a stable supply voltage, and place 100 nF decoupling capacitors close to each VDD pin and a 4.7 uF bulk capacitor on the main supply. For battery-powered designs, utilize the low-power modes (Sleep, Stop, Standby) to minimize current consumption. In Standby mode, the current drops to 100 nA, but ensure the RTC and wake-up sources are configured correctly.
For the LQFP64 package, ensure proper grounding by connecting the exposed pad (if present) to the ground plane. Place the crystal oscillator (if used) close to the OSC_IN/OSC_OUT pins and keep traces short to reduce parasitic capacitance. For ADC accuracy, separate analog and digital ground planes and route analog signals away from high-speed digital traces. Use a ground plane under the MCU to reduce noise.
Do not exceed the absolute maximum ratings, especially on VDD and VDDA. Ensure the NRST pin is properly pulled up with a 100 nF capacitor to ground for reliable reset. When using the USB interface, ensure proper termination and ESD protection. Also, be aware that the STM32L433RCT6 is not AEC-Q100 qualified, so it is not suitable for automotive applications without additional qualification.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
