STM32L051C6T6 - 32MHz Cortex-M0+ 32KB MCU | STMicroelectronics
MPN: STM32L051C6T6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.8671 | $2.87 |
| 10 | $2.76 | $27.60 |
| 100 | $2.52 | $252.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.94 | $1,940.00 |
STM32L051C6T6 Overview
A microcontroller is a programmable semiconductor system that integrates a CPU core, memory, I/O, and peripherals on one device. In the STM32 hierarchy, this MCU belongs to the STM32 family, the STM32L0 series, and the Arm Cortex-M0+ embedded-processing class. That architecture supports compact control firmware while separating larger tasks from low-power sensing or monitoring functions.
The verified product information identifies a 32-bit Arm Cortex-M0+ core, 32 MHz operating frequency, 32 KB Flash, and an LQFP package measuring 7 mm by 7 mm. Distributor records also identify this orderable variant as a 48-pin tray-packaged device. The STM32L051x6/8 family description additionally lists embedded memory protection, enhanced I/O, and low-power capabilities, although individual peripheral values are not present in the supplied verification data.
Ultra-low-power MCU architecture is particularly useful where average energy consumption matters more than maximum processing throughput. A device such as the STM32L051C6T6 can serve as the central controller for a battery-powered sensor node, industrial monitoring module, or connected actuator controller. Its 32 MHz Cortex-M0+ core provides a straightforward Arm software target, while 32 KB Flash constrains firmware and boot-code capacity compared with higher-memory STM32 devices.
Potential uses include compact environmental sensors, low-power condition-monitoring nodes, appliance controls, meter interfaces, actuator controls, and embedded accessories that periodically wake a controller to acquire or process data. The 48-LQFP package also exposes more I/O than small dual in-line packages, but it requires a larger PCB footprint and careful assembly planning.
Design planning should begin with the manufacturer’s pinout, memory map, and electrical limits. Do not infer unavailable GPIO, timer, analog, communication, voltage, current, or temperature specifications from family-level descriptions. Confirm that 32 KB of Flash is sufficient for the final bootloader and application, and review the exact peripheral mapping for each 48-pin board design.
This product page combines verified manufacturer specifications, distributor availability, sourcing details, and application guidance. It also distinguishes exact drop-in alternatives from broader functional substitutes, helping engineers make PCB-level decisions without treating different Cortex-M devices as interchangeable.
Drop-in alternatives for STM32L051C6T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32L051C6T6 (same form factor and footprint) — differing in Package, Flash Memory, Communication Interfaces, Core, Low-Power Modes.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32L051C8T3
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →STM32L051C8T6
✅ Drop-In✓ In Stock
$0.9773 / Unit
View Datasheet →STM32L051C8T7
✅ Drop-In📋 Reference alternative (not in catalog)
STM32L073CBT6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32L152C6T6A
✅ Drop-In📋 Reference alternative (not in catalog)
STM32L051C6T6 Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit microcontroller |
| CPU Core | Arm Cortex-M0+ |
| Instruction Set Architecture | 32-bit Arm RISC |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 32 KB |
| RAM | 8 KB |
| Data EEPROM | 2 KB at family level; STM32L051C6 variant capacity requires datasheet confirmation |
| Family Flash Capacity | Up to 64 KB across STM32L051x6/8 family |
| Family Data EEPROM | 2 KB across STM32L051x6/8 family |
| Memory Protection Unit | Present at family level |
| Package | 48-LQFP |
| Package Dimensions | 7 mm x 7 mm |
| Pin Count | 48 pins |
| Mounting Type | Surface mount |
| Operating Supply | 2.5 V / 3.3 V device description |
| Low-Power Modes | Ultra-low-power operation; exact mode currents require datasheet confirmation |
STM32L051C6T6 7 mm x 7 mm Pin Configuration Guide
Pin configuration for STM32L051C6T6 (7 mm x 7 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32L051C6T6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32L051C6T6 is suitable for 6 applications: Battery-Powered Environmental Sensor Node, Industrial Condition Monitoring, Smart Meter Data Acquisition, Low-Power Actuator Controller, Connected Appliance Controller, Portable Medical or Wellness Device Control.
Battery-Powered Environmental Sensor Node
The STM32L051C6T6 fits an environmental sensor node that periodically reads temperature, humidity, or gas data and transmits a compact status record. Its verified 32 MHz Arm Cortex-M0+ core can execute acquisition, filtering, and communication-control firmware, while the STM32L0 family’s ultra-low-power positioning supports duty-cycled operation. The 32 KB Flash budget must include the bootloader, drivers, protocol stack, and application logic. A production design should verify active and sleep currents from the manufacturer datasheet, then size the battery around the selected sensor’s duty cycle and wake frequency.
Recommended
Industrial Condition Monitoring
The STM32L051C6T6 can serve as the local controller for an industrial vibration, temperature, or equipment-state monitor. Its 32-bit Cortex-M0+ architecture handles sampling sequencing, threshold checks, event logging, and communication framing, while 8 KB RAM supports bounded real-time processing. The 48-LQFP package provides more external connections than small packages, which is useful for multiple digital inputs or sensor interfaces. Engineers must still confirm the required timers, ADC channels, comparators, serial interfaces, and supply limits against the official datasheet before freezing the design.
Recommended
Smart Meter Data Acquisition
The STM32L051C6T6 is appropriate for a compact meter interface that gathers pulse, status, or sensor measurements and prepares data for transmission. The 32 MHz core is suitable for deterministic protocol handling and measurement control, while the STM32L0 access-line positioning supports low-power meter designs. Firmware capacity is the principal constraint: the verified 32 KB Flash leaves limited room for a bootloader, communications, security updates, and application code. Designers should reserve memory during architecture planning and confirm the exact pin multiplexing and metering peripherals in the manufacturer documentation.
Recommended
Low-Power Actuator Controller
The STM32L051C6T6 can coordinate valves, relays, or small motor-control stages in a low-power actuator subsystem. Firmware can manage digital commands, status feedback, interlocks, and fault reporting while the Cortex-M0+ core executes control logic at up to 32 MHz. The 48-LQFP package supports a mixture of control and communication signals, but every assigned peripheral function must be checked against its alternate-function table. Validate output current, isolation, flyback paths, and shutdown behavior at the system level because pin-level drive limits are not included in the supplied source data.
Recommended
Connected Appliance Controller
The STM32L051C6T6 fits an appliance controller that combines local user-interface logic, sensor monitoring, and a simple communications link. Its Arm Cortex-M0+ ecosystem supports a compact embedded-control software stack, and the STM32L0 family’s low-power emphasis is useful in standby or intermittent operating modes. The design must ensure that the 32 KB Flash and 8 KB RAM budgets cover all control paths, including production boot and updates. Before schematic capture, confirm display, serial, keypad, and motor-control requirements because the supplied source does not enumerate the exact peripheral configuration.
Recommended
Portable Medical or Wellness Device Control
The STM32L051C6T6 may be evaluated for a compact wellness-device controller that gathers low-bandwidth sensor data, applies basic filtering, and records operating status. Its compact 32-bit controller and low-power-family positioning are useful for portable products, while the 48-LQFP package simplifies access to multiple external signals. Medical designs require more than processor selection: engineers must assess electrical isolation, sensor accuracy, firmware controls, risk documentation, and applicable quality requirements. Use this MCU as a candidate only after confirming exact analog, communication, and power specifications from the manufacturer datasheet.
Recommended
Recommended Products Summary
Engineering reference data for STM32L051C6T6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L051C8T3 | STM32L051C8T6 | STM32L051C8T7 | STM32L073CBT6 | STM32L152C6T6A |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 48-LQFP | 48-LQFP | 48-LQFP | 48-LQFP | LQFP-48 | LQFP-48 |
| CPU Core | Arm Cortex-M0+ | Arm Cortex-M0+ at family level | Arm Cortex-M0+ at family level | Arm Cortex-M0+ at family level | Arm Cortex-M0+ at family level | Arm Cortex-M3 |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 32 KB | 64 KB indicated by C8 cross-reference | 64 KB indicated by C8 cross-reference | 64 KB indicated by C8 cross-reference | 128 KB indicated by C8 naming; exact order-table value requires datasheet confirmation | 32 KB |
| Product Positioning | Access line ultra-low-power MCU | STM32L051 access-line family | STM32L051 access-line family | STM32L051 access-line family | STM32L0 family | Ultra-low-power Arm Cortex-M3 MCU |
| Pin Count | 48 pins | 48 pins | 48 pins | 48 pins | 48 pins | 48 pins |
Key Differentiators
- Lower on-chip Flash requirement alignment (vs STM32L073CBT6)
- Lower RAM footprint than Cortex-M3 alternative (vs STM32L152C6T6A)
- Cortex-M0+ software target (vs STM32L152C6T6A)
- Same 48-LQFP mechanical family (vs STM32L051C8T6)
Design Notes
Start the layout from the official LQFP-48 land pattern and pin table, including thermal or exposed-pad requirements if specified for the exact order code. Place required decoupling capacitors beside their associated supply pins and preserve the manufacturer’s return-path geometry. The verified data establishes a 7 mm by 7 mm LQFP body but not the land dimensions, so do not scale a generic footprint without consulting the package drawing.
Design the 2.5 V or 3.3 V supply path around the exact regulator output, load current, startup behavior, and maximum tolerance listed in the manufacturer datasheet. Separate analog or sensor supplies from digital switching nodes where practical, and verify every external pin’s voltage domain before connecting it. The supplied data does not provide current consumption or regulator enable requirements, so those values must not be inferred from the 32 MHz CPU rating.
Keep clock, reset, and high-speed communication traces short and routed away from switching nodes. Programmable I/O functions must be assigned from the exact alternate-function matrix for the 48-pin device; changing a package, memory-density code, or temperature-grade code can alter valid pin combinations. Perform an independent pin audit against schematic symbols and compare it with the official package drawing before releasing manufacturing data.
Avoid assuming that all Cortex-M0+ devices with 48-pin packages are interchangeable. The STM32L051C6T6 has a constrained 32 KB Flash and 8 KB RAM budget, and firmware migration can also change interrupt vectors, peripheral addresses, clock setup, and low-power behavior. Treat memory-density and package-code substitutions as separate qualifications, including bootloader, brownout, debug, and production-test checks.
Compliance Information
The supplied verified results do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. AEC-Q100 is marked not applicable because the target order code is not identified as an automotive-qualified variant.
