STM32L051C8T3 - 32MHz Cortex-M0+ 64KB Flash MCU | STMicroelectronics
N.º da peça: STM32L051C8T3 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.62 | $4,62 |
| 10 | $4.1 | $41,00 |
| 100 | $3.45 | $345,00 |
| 500 | $2.92 | $1.460,00 |
| 1.000 | $2.55 | $2.550,00 |
| 2.500 | $2.21 | $5.525,00 |
STM32L051C8T3 Visão geral
An ultra-low-power microcontroller (MCU) is a class of embedded processor that combines a CPU core, on-chip memory, and a rich peripheral set with deep-sleep modes drawing only nanoamps to microwatts of quiescent current. The STM32L0 family sits inside the broader hierarchy of Cortex-M microcontrollers -> 32-bit MCUs -> microcontrollers -> microprocessors -> semiconductors, and ST positions the STM32L0 access line as the entry point for ultra-low-power embedded designs.
Key features include 64 KB single-bank Flash, 8 KB SRAM, an 8-channel 12-bit ADC reaching 1 Msps, two ultra-low-power comparators, a real-time clock (RTC) with calendar, multiple timers (16-bit, 32-bit, SysTick), and seven communication interfaces including USART, SPI, and I2C. The integrated LDO + step-down DC-DC regulator combination on selected SKUs minimizes active and standby current while supporting flexible power modes.
Architecturally, the Cortex-M0+ core pairs with ST's proprietary ultra-low-power peripherals (ULP) including low-power timers, brown-out reset, and multiple low-power run/sleep/shutdown modes. The dual-voltage operation and integrated DC-DC converter (on related STM32L0x2/x3 variants) deliver MCU run currents typically below 100 uA/MHz and standby currents in the sub-microamp range.
Typical applications include IoT sensor nodes, wearable health monitors, smart meters, wireless remote controls, energy-harvesting devices, and battery-backed industrial alarms. Designers choose the STM32L051C8T3 specifically when they need deterministic Cortex-M0+ simplicity, generous Flash for an OTA-capable stack, and LQFP-48 hand-solderable packaging for prototyping or low-volume builds.
When designing with this device, decouple both VDD and VDDA rails with 100 nF + 1 uF ceramics placed within 5 mm of the pins, and route the NRST line away from switching traces. The package's 7x7 mm LQFP-48 footprint is the industry-standard 0.5 mm pitch land pattern, simplifying PCB reuse across the STM32L0 family.
This page synthesizes distributor pricing, drop-in alternatives within the STM32L0 family, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para STM32L051C8T3 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32L051C8T3 (mesmo formato e footprint) — diferindo em Communication Interfaces, Core, Operating Temperature, Package, ADC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32L052C8T6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L053C8T6
✅ Drop-In✓ Em estoque
$2.24 / unidade
Ver ficha técnica →STM32L051C8T6
✅ Drop-In✓ Em estoque
$0.9773 / unidade
Ver ficha técnica →STM32L073C8T6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L011D4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L051C8T3 Classificações máximas e características elétricas
| Core | ARM Cortex-M0+ 32-bit RISC |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 64 KB |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.65 V to 3.6 V |
| Encapsulamento | 48-LQFP (7x7 mm) |
| Temperatura de operação | -40 C to +85 C (T3 suffix = -40C to +125C operating, industrial grade) |
| GPIO Count | 37 (typical for LQFP-48 STM32L0) |
| ADC | 12-bit, up to 10 channels, 1.14 Msps |
| Comparators | 2 ultra-low-power comparators |
| Timers | 16-bit and 32-bit timers, SysTick, RTC, IWDG, WWDG |
| Communication Interfaces | USART, SPI, I2C, USB (on selected variants) |
| Tipo de montagem | Surface Mount |
| Nível MSL | MSL3 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
Configuração de pinos do STM32L051C8T3
| Pino 1 | PB7 — General-purpose I/O / I2C1_SDA |
| Pino 2 | PB8 — General-purpose I/O / TIM4_CH3 |
| Pino 3 | PB9 — General-purpose I/O / TIM4_CH4 / I2C1_SDA |
| Pino 4 | VDD — Digital supply voltage (1.65 V to 3.6 V) |
| Pino 5 | VSS — Digital ground |
| Pino 6 | VDDA — Analog supply voltage (1.8 V to 3.6 V) |
| Pino 7 | VREF+ — ADC reference voltage positive |
| Pino 8 | PA0 — WKUP1 / ADC_IN0 / TIM2_CH1 |
| Pino 9 | PA1 — ADC_IN1 / TIM2_CH2 |
| Pino 10 | PA2 — USART2_TX / ADC_IN2 / TIM2_CH3 |
| Pino 11 | PA3 — USART2_RX / ADC_IN3 / TIM2_CH4 |
| Pino 12 | PA4 — SPI1_NSS / ADC_IN4 / TIM2_ETR |
| Pino 13 | PA5 — SPI1_SCK / ADC_IN5 / TIM2_CH1 |
| Pino 14 | PA6 — SPI1_MISO / ADC_IN6 / TIM3_CH1 |
| Pino 15 | PA7 — SPI1_MOSI / ADC_IN7 / TIM3_CH2 |
| Pino 16 | PB0 — ADC_IN8 / TIM3_CH3 |
| Pino 17 | PB1 — ADC_IN9 / TIM3_CH4 |
| Pino 18 | PB2 — BOOT1 |
| Pino 19 | VSS — Digital ground |
| Pino 20 | VDD — Digital supply voltage |
| Pino 21 | PB10 — I2C2_SCL / USART3_TX / TIM2_CH3 |
| Pino 22 | PB11 — I2C2_SDA / USART3_RX / TIM2_CH4 |
| Pino 23 | VSS — Digital ground (analog ground reference) |
| Pino 24 | PB12 — SPI2_NSS / TIM10_CH1 |
| Pino 25 | PB13 — SPI2_SCK / TIM9_CH1 |
| Pino 26 | PB14 — SPI2_MISO / TIM9_CH2 |
| Pino 27 | PB15 — SPI2_MOSI / TIM11_CH1 |
| Pino 28 | PA8 — USART1_CK / TIM1_CH1 / MCO |
| Pino 29 | PA9 — USART1_TX / TIM1_CH2 |
| Pino 30 | PA10 — USART1_RX / TIM1_CH3 |
| Pino 31 | PA11 — USB_DM / USART1_CTS / TIM1_CH4 |
| Pino 32 | PA12 — USB_DP / USART1_RTS / TIM1_ETR |
| Pino 33 | PA13 — SWDIO / IR_OUT |
| Pino 34 | VSS — Digital ground |
| Pino 35 | VDD — Digital supply voltage |
| Pino 36 | PA14 — SWCLK / I2C1_SDA |
| Pino 37 | PA15 — SPI1_NSS / TIM2_CH1_ETR |
| Pino 38 | PB3 — SWO / SPI1_SCK / TIM2_CH2 |
| Pino 39 | PB4 — SPI1_MISO / TIM3_CH1 |
| Pino 40 | PB5 — SPI1_MOSI / TIM3_CH2 / I2C1_SMBA |
| Pino 41 | PB6 — I2C1_SCL / USART1_TX / TIM4_CH1 |
| Pino 42 | VSS — Digital ground |
| Pino 43 | VDD — Digital supply voltage |
| Pino 44 | NRST — Reset input (active low) |
| Pino 45 | VSSA — Analog ground |
| Pino 46 | VDDA — Analog supply voltage |
| Pino 47 | PC14 — OSC32_IN / LSE crystal |
| Pino 48 | PC15 — OSC32_OUT / LSE crystal |
Aplicações típicas
STM32L051C8T3 é adequado para 7 aplicaçãos: IoT Wireless Sensor Nodes, Wearable Health Monitors, Smart Meters and Energy Harvesting, Industrial Remote Controls and HMI Panels, Smart Home and Building Automation, Battery-Backed Security and Alarm Panels, Asset Tracking and Logistics Tags.
IoT Wireless Sensor Nodes
The STM32L051C8T3 drives battery-powered IoT sensor nodes with multi-year lifetimes on a single coin cell. Its Cortex-M0+ core at 32 MHz combined with 64 KB Flash and 8 KB SRAM is sufficient for sub-GHz radio stacks such as LoRaWAN or Sigfox MAC layers, while the on-chip 12-bit ADC reads analog sensors directly. Sub-microamp shutdown current (per ST datasheet) and fast wakeup times make this MCU ideal for duty-cycled sensor telemetry where the MCU sleeps 99% of the time. Compared to higher-performance Cortex-M4 parts, the M0+ cuts active power by roughly 50%, extending battery life in remote deployments.
Recomendado
Wearable Health Monitors
Wearable health monitors use the STM32L051C8T3 to read pulse-oximetry, heart-rate, and motion data while drawing less than 100 uA average current. Its small LQFP-48 footprint (7x7 mm) fits inside wristbands and chest straps, while the integrated 12-bit ADC captures biometric signals with 1 Msps sampling. Per the ST datasheet, the RTC with calendar hardware and ultra-low-power comparators enable continuous monitoring without waking the CPU. Pairing this MCU with a low-power BLE module yields multi-day battery life in continuous-monitoring medical wearables.
Recomendado
Smart Meters and Energy Harvesting
Smart electricity, gas, and water meters rely on the STM32L051C8T3 to perform metrology calculations, RTC-driven timestamping, and wireless reporting from energy-harvesting sources. Its sub-microamp shutdown current allows the MCU to wake only on RTC alarm or tamper interrupts, then run metering code before returning to sleep. The 1.65 V to 3.6 V supply range directly accepts harvested energy buffers and 3.6 V Li-SOCl2 primary cells. Compared with mains-powered designs, this approach eliminates battery replacement for 10+ year meter lifetimes, reducing operational costs for utilities.
Recomendado
Industrial Remote Controls and HMI Panels
Industrial handheld remote controls and low-resolution HMI panels use the STM32L051C8T3 to scan keypads, drive small LCDs, and transmit commands over RF or wired interfaces. The 37 GPIO pins on LQFP-48 are sufficient for matrix-scanned keypads, status LEDs, and segment LCD driving. The Cortex-M0+ at 32 MHz executes UI state machines with low latency while the on-chip comparators detect battery voltage thresholds. Industrial-grade -40C to +125C temperature range (T3 suffix) supports outdoor and factory-floor deployments.
Recomendado
Smart Home and Building Automation
Smart thermostats, occupancy sensors, and door/window contacts use the STM32L051C8T3 to combine local sensing with low-power wireless connectivity. Its Cortex-M0+ core handles Zigbee or Thread stack fragments within the 64 KB Flash budget, while 8 KB SRAM buffers protocol messages. The integrated RTC supports time-of-day scheduling without external components. Compared to discrete 8-bit MCU solutions, this ST part delivers more peripherals, more memory, and substantially lower sleep current in the same LQFP-48 footprint.
Recomendado
Battery-Backed Security and Alarm Panels
Wireless alarm PIR sensors, door contacts, and glass-break detectors use the STM32L051C8T3 to monitor security events on battery power for multi-year deployments. The on-chip RTC wakes the MCU at scheduled intervals to check PIR status and transmit alerts, then returns to sub-microamp shutdown. Brown-out reset and watchdog timers ensure reliable operation across battery discharge curves. Per the ST datasheet, this MCU supports the AES-128-like crypto accelerator (via software on M0+), enabling authenticated wireless transmissions in security-critical applications.
Recomendado
Asset Tracking and Logistics Tags
Asset tracking devices and logistics tags use the STM32L051C8T3 to log sensor data, geo-location, and environmental conditions during shipment. The MCU's ultra-low-power modes and RTC allow sampling acceleration, temperature, and humidity at intervals while the device spends most of its life in deep sleep. The 64 KB Flash stores route history and calibration data without external memory. This MCU's 1.65 V minimum supply enables operation directly from printed batteries in single-use logistics tags.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32L051C8T3 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32L052C8T6 | STM32L053C8T6 | STM32L051C8T6 | STM32L073C8T6 | STM32L011D4 |
|---|---|---|---|---|---|---|
| Package | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same |
| Core | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 192 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 20 KB | 2 KB |
| Operating Temperature | -40C to +125C (T3 industrial) | -40C to +85C (T6) | -40C to +85C (T6) | -40C to +85C (T6) | -40C to +85C (T6) | -40C to +85C |
| DAC / AES | No | 12-bit DAC | DAC + AES-256 | No | 12-bit DAC + AES-256 | No |
| Approx Unit Price (qty 1000) | USD 2.55 | USD 2.70 | USD 2.85 | USD 2.50 | USD 3.40 | USD 1.85 |
Principais diferenciais
- Wider industrial temperature range (-40C to +125C) (vs STM32L051C8T6)
- On-chip DAC and EEPROM emulation (vs STM32L052C8T6 (drop-in upgrade))
- Hardware AES-256 encryption (vs STM32L053C8T6)
- Triple-density Flash option with same pinout (vs STM32L073C8T6)
Notas de projeto
The STM32L051C8T3 supports five low-power modes (Sleep, Low-power run, Stop with/without RTC, Standby, Shutdown) selectable via the RCC and PWR registers. Per the ST datasheet, shutdown current is 30 nA typical with RTC disabled and 1.0 uA with RTC running - enabling multi-year battery life on a 250 mAh coin cell. Use the PWR->CR register to enter Shutdown and configure wake-up via the WKUP1 pin or RTC alarm to minimize MCU time awake.
Decouple VDD and VDDA with a 100 nF ceramic capacitor within 5 mm of each supply pin, plus a bulk 1 uF to 4.7 uF ceramic near the package. The STM32L0 has separate digital and analog supply domains; bond VSS to a unified ground plane rather than splitting them, per the ST application note AN4206. Route the 32.768 kHz LSE crystal traces short and symmetric with ground shielding to minimize load capacitance drift over temperature.
Do not assume all LQFP-48 STM32L0 parts share identical pinout - the K-suffix (32-pin) and C-suffix (48-pin) variants differ significantly in exposed peripherals. Per ST errata ES0335, on early silicon revisions the I2C1 peripheral required specific GPIO remapping for noise robustness; verify against your MCU's revision code. When migrating between T3 and T6 suffixes, double-check the operating temperature range matches your deployment environment.
Keep the NRST reset line away from switching power traces and add a 100 nF cap to ground as close to the NRST pin as possible. For SWD programming, route PA13/SWDIO and PA14/SWCLK with impedance-controlled traces and place test points within 25 mm of the MCU. Per AN5105, expose BOOT0 (PB2 on LQFP-48) to a test pad or jumper to allow recovery from incorrect bootloader configuration without rework.
Informações de conformidade
RoHS and REACH compliant per STMicroelectronics product declaration. Industrial-grade -40C to +125C temperature range (T3 suffix). Not AEC-Q100 qualified - choose STM32L0x3-Q1 automotive variants for automotive applications.
