STM32L031F4P7 STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
STM32L031F4P7 is an ultra-low-power ARM Cortex-M0+ microcontroller from STMicroelectronics running at 32 MHz with 16 KB Flash, 8 KB SRAM, and 1 KB EEPROM in a compact TSSOP-20 package. From $1.50 in stock worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- STM32L031F4P7 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low-power Cortex-M0+ core at up to 32 MHz draws as little as 76 µA/MHz in run mode, ideal for coin-cell IoT nodes
- Integrated 1 KB true EEPROM enables non-volatile parameter storage without external flash or emulation wear-leveling overhead
- 7-channel DMA controller offloads peripheral data transfers, reducing CPU wake-up frequency in energy-sensitive firmware
- 12-bit ADC with up to 10 channels supports analog sensor acquisition directly from the MCU with no external ADC needed
Applications
The STM32L031F4P7 targets battery-powered IoT sensors, smart meters, wearables, and asset-tracking tags requiring long autonomy on a small battery or energy harvester. Its stop-mode current below 400 nA with RTC active and integrated 1 KB EEPROM reduce external component count, lowering BOM cost and board area. The TSSOP-20 package is well-suited for space-constrained PCBs in industrial wireless sensor nodes and environmental monitoring devices.
Specifications
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 32 |
| Boundary Scan | NO |
| CPU Family | CORTEX-M0 |
| Clock Frequency-Max | 25MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | R-PDSO-G20 |
| Number of DMA Channels | 7 |
| Number of I/O Lines | 15 |
| Number of Timers | 5 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| RAM (bytes) | 8192 |
| ROM (words) | 16384 |
| ROM Programmability | FLASH |
| Speed | 32MHz |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.31.00.25 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for STM32L031F4P7:
RISC Microcontroller, 32-Bit, FLASH, Cortex-M0+ CPU, 32MHz, CMOS, PDSO20
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M0 CPU, 32MHz, CMOS, PDSO20
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M0 CPU, 32MHz, CMOS, PDSO20
RISC Microcontroller, 32-Bit, FLASH, Cortex-M0+ CPU, 32MHz, CMOS, PDSO20
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M0 CPU, 32MHz, CMOS, PDSO20
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M0 CPU, 32MHz, CMOS, PDSO20
Frequently Asked Questions
What is the maximum CPU frequency and memory configuration of the STM32L031F4P7?
The STM32L031F4P7 runs at up to 32 MHz on an ARM Cortex-M0+ core and integrates 16 KB of Flash program memory, 8 KB of SRAM, and 1 KB of embedded true EEPROM. The EEPROM provides byte-level erase and write capability with up to 100,000 write cycles, eliminating the need for external EEPROM chips in data-logging or configuration-storage applications.
How low is the standby current of the STM32L031F4P7, and how does that benefit coin-cell designs?
The STM32L031F4P7 achieves a standby current below 400 nA with the RTC running, and as low as 200 nA without RTC. For a coin-cell battery with 200 mAh capacity, this translates to a theoretical shelf life exceeding 100 years in deep sleep, making the MCU practical for asset trackers and environmental sensors that spend most of their time asleep and wake briefly every few minutes to sample data.
For a compact IoT sensor PCB, what package does the STM32L031F4P7 use and how many I/O pins are available?
The STM32L031F4P7 comes in a TSSOP-20 package measuring approximately 6.5 × 4.4 mm, offering up to 18 GPIO pins. Available peripherals mapped to these pins include USART, SPI, I2C, a 12-bit ADC with multiple channels, and timers, providing a full embedded peripheral set within a very compact footprint suited to single-layer or two-layer PCB designs.
How does the DMA controller in the STM32L031F4P7 reduce active-mode power consumption in sensor firmware?
The STM32L031F4P7 includes a 7-channel DMA controller that transfers data between peripherals and SRAM without CPU intervention. In a typical ADC sampling loop, DMA can fill a 64-sample buffer while the CPU remains in sleep mode, cutting CPU active time by up to 80% compared with polling. This reduces average current consumption significantly in duty-cycled measurement applications.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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