STM32L021D4P7 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
N.º de pieza: STM32L021D4P7 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.5 | $2,50 |
| 10 | $2.25 | $22,50 |
| 100 | $1.95 | $195,00 |
| 500 | $1.75 | $875,00 |
| 1.000 | $1.55 | $1.550,00 |
STM32L021D4P7 Descripción general
An ultra-low-power microcontroller (MCU) is a system-on-chip that combines a processor core, memory, and peripherals on a single integrated circuit, optimized for minimal energy consumption. The STM32L0 family sits within the broader hierarchy of microcontrollers, which are a type of embedded processor used in everything from consumer electronics to industrial control. The Cortex-M0+ core is a 32-bit RISC processor designed for low-power and cost-sensitive applications, offering a balance of performance and efficiency.
Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop, Standby), a 12-bit ADC with hardware oversampling, ultra-low-power comparators, and a real-time clock (RTC) with calendar. The device supports a wide supply voltage range from 1.65V to 3.6V, making it suitable for single-cell battery operation. It also includes a rich set of communication interfaces, including I2C, SPI, and USART, enabling flexible connectivity.
The STM32L021D4P7 is built on ST's ultra-low-leakage process technology, achieving typical current consumption of 0.29 µA in Standby mode with RTC, and 3.4 µA in Stop mode. This makes it ideal for applications that spend most of their time in sleep mode, waking periodically to perform tasks. The device also features a unique 96-bit ID, which can be used for security and traceability.
Typical applications include wearable devices, smart sensors, medical monitoring devices, and industrial IoT nodes. Its low power consumption and small footprint make it perfect for space-constrained designs. For example, in a smart sensor node, the MCU can wake up every few seconds to read a sensor, process the data, and transmit it wirelessly, then return to sleep, extending battery life to years.
When designing with this device, pay attention to the power supply decoupling and the selection of the appropriate low-power mode for your application. The STM32L0 series offers a comprehensive set of development tools, including the STM32CubeMX configuration tool and the STM32CubeL0 firmware library, which accelerate development and reduce time-to-market.
Alternativas directas para STM32L021D4P7 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
STM32L021D4P6
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
STM32L031D4P7
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
STM32L011D4P7
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
STM32L021D4P7 Valores máximos y características eléctricas
| Core | ARM Cortex-M0+ |
| Frecuencia de reloj máxima | 32 MHz |
| Flash Memory | 16 KB |
| SRAM | 8 KB |
| EEPROM | 512 bytes |
| Supply Voltage Range | 1.65 V to 3.6 V |
| Standby Current (with RTC) | 0.29 µA |
| Stop Mode Current | 3.4 µA |
| ADC Resolution | 12-bit |
| Communication Interfaces | I2C, SPI, USART |
| Encapsulado | TSSOP-14 |
| Tipo de montaje | Surface Mount |
| Rango de temperatura de funcionamiento | -40°C to +125°C |
| Unique ID | 96-bit |
| Low-Power Modes | Sleep, Low-power Run, Low-power Sleep, Stop, Standby |
Configuración de pines de STM32L021D4P7
| Pin 1 | VDD — Power supply |
| Pin 2 | PA0 — GPIO / ADC input |
| Pin 3 | PA1 — GPIO / ADC input |
| Pin 4 | PA2 — GPIO / USART TX |
| Pin 5 | PA3 — GPIO / USART RX |
| Pin 6 | PA4 — GPIO / SPI NSS |
| Pin 7 | PA5 — GPIO / SPI SCK |
| Pin 8 | PA6 — GPIO / SPI MISO |
| Pin 9 | PA7 — GPIO / SPI MOSI |
| Pin 10 | PB0 — GPIO / ADC input |
| Pin 11 | PB1 — GPIO / ADC input |
| Pin 12 | NRST — Reset (active low) |
| Pin 13 | VSS — Ground |
| Pin 14 | PA9 — GPIO / USART TX |
Aplicaciones típicas
STM32L021D4P7 es adecuado para 6 aplicacións: Wearable Devices, Smart Sensors, Medical Monitoring Devices, Industrial IoT Nodes, Energy Harvesting Systems, Smart Home Devices.
Wearable Devices
The STM32L021D4P7 is ideal for wearable devices such as fitness trackers and smartwatches. Its ultra-low power consumption (0.29 µA standby) extends battery life, while the small TSSOP-14 package fits compact designs. The MCU can handle sensor data acquisition, processing, and wireless communication, making it a versatile choice for wearables that require long battery life and small form factor.
Recomendado
Smart Sensors
In smart sensor nodes, the STM32L021D4P7 can wake up periodically to read sensors, process data, and transmit results, then return to sleep. Its low-power modes and 12-bit ADC with oversampling enable accurate measurements with minimal energy. The wide supply voltage range (1.65V to 3.6V) allows direct battery operation, and the I2C/SPI interfaces connect to various sensors.
Recomendado
Medical Monitoring Devices
The STM32L021D4P7 is suitable for medical monitoring devices like glucose meters and heart rate monitors. Its ultra-low power consumption ensures long battery life for portable devices, and the 12-bit ADC can interface with biosensors. The device's reliability and wide temperature range make it suitable for medical environments.
Recomendado
Industrial IoT Nodes
For industrial IoT applications, the STM32L021D4P7 provides reliable operation in harsh environments with its -40°C to +125°C temperature range. Its low-power modes enable battery-powered wireless sensor nodes that can operate for years. The USART interface allows connection to industrial protocols like Modbus, and the device's robustness makes it suitable for factory automation.
Recomendado
Energy Harvesting Systems
The STM32L021D4P7 is designed for energy harvesting applications where power is scarce. Its ultra-low power consumption (0.29 µA standby) allows operation from solar cells or thermoelectric generators. The wide voltage range (1.65V to 3.6V) accommodates varying energy harvester outputs, and the low-power modes ensure efficient use of harvested energy.
Recomendado
Smart Home Devices
In smart home applications, the STM32L021D4P7 can control lighting, thermostats, and security sensors. Its low-power consumption is ideal for battery-powered devices like smart locks and motion detectors. The I2C and SPI interfaces connect to various sensors and actuators, and the small package allows integration into compact home automation modules.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para STM32L021D4P7 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | STM32L021D4P6 | STM32L031D4P7 | STM32L011D4P7 | LPC812M101JDH16 | EFM8BB10F8G-A-QFN20 |
|---|---|---|---|---|---|---|
| Package | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-16 | QFN-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Silicon Labs |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | 8051 |
| Max Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 30 MHz | 25 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 4 KB | 1 KB |
| Standby Current | 0.29 µA | 0.29 µA | 0.29 µA | 0.29 µA | 1.5 µA | 0.5 µA |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
Diferenciadores clave
- Ultra-low standby current of 0.29 µA with RTC (frente a LPC812M101JDH16)
- Integrated EEPROM (512 bytes) (frente a EFM8BB10F8G-A-QFN20)
- Wider temperature range (-40°C to +125°C) (frente a STM32L021D4P6)
Notas de diseño
Decouple the VDD pin with a 100nF ceramic capacitor placed as close as possible to the pin, and a 1µF capacitor for bulk decoupling. For ultra-low-power operation, ensure the power supply is stable and noise-free, as the MCU's current consumption is very low and susceptible to noise.
For the TSSOP-14 package, ensure proper soldering with a stencil thickness of 0.125mm. Use a 0.5mm pad width and 0.65mm pitch. Provide a ground plane under the device to reduce noise and improve thermal performance.
When using low-power modes, ensure all unused GPIOs are configured to analog mode or pulled to a defined state to avoid floating inputs that increase leakage current. Also, verify that the RTC is properly configured if used in standby mode, as it requires the LSE oscillator.
Información de cumplimiento
Compliance information based on STMicroelectronics general product compliance. Specific certifications not provided in the verified data.
