STM32L073RBT6 - 32MHz ARM Cortex-M0+ 128KB Flash MCU | ST
MPN: STM32L073RBT6 ✓ Hoạt độngSTM32L073RBT6 Tóm tắt
What is a low-power ARM Cortex-M0+ MCU? It is a microcontroller built around the smallest ARM Cortex-M core paired with extensive power management, optimized for battery-powered and energy-harvesting designs where nanoamp standby current extends operating life. The STM32L0 series builds on this lineage, occupying the broader class of 32-bit ultra-low-power microcontrollers within the power management and embedded systems taxonomy.
Key differentiating specifications include a wide 1.65 V to 3.6 V supply range, 6 KB of true EEPROM, an integrated 12-bit ADC with oversampling, two 12-bit DAC channels, RTC with calendar and tamper detection, and a USB 2.0 full-speed interface with on-chip pull-up and 48 MHz internal oscillator eliminating the external crystal requirement.
Architecturally, the device pairs the Cortex-M0+ core with ST's ultra-low-power voltage scaling (5 power domains, 7 low-power modes), the S-Touch capacitive sensing controller for touch buttons, and the standard STM32 ecosystem of timers, DMA channels, and communication peripherals for deterministic real-time performance.
Typical applications include battery-powered IoT sensor nodes with USB charging, medical wearables, smart metering with LCD readout, alarm and security panels, asset tracking tags, and portable consumer devices that benefit from sub-microamp standby current and integrated USB.
When designing with this device, pay attention to decoupling and ground layout. Place 100 nF ceramic capacitors adjacent to every VDD pin and a single 4.7 µF bulk capacitor on the main rail. For USB applications, route DP and DM traces 90 ohm differential with matched lengths.
This page synthesizes distributor pricing, application-grade parametric comparisons, and design notes not found in the manufacturer datasheet, providing engineers with a single reference for component selection.
Bộ thay thế dễ dàng lắp đặt cho STM32L073RBT6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32L073RBT6 (cùng hình factor và footprint) — khác nhau ở ADC, Timers, DAC, Package, Core Architecture.
STM32L073RBT3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32L073RBT6TR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L072RBT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32L073VBT6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32G073RBT6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
APM32L073RBT6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32L073RBT6 Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ |
| Core Width | 32-bit |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| RAM Size | 20 KB |
| EEPROM Size | 6 KB |
| Supply Voltage Range | 1.65 V to 3.6 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C |
| Hộp | 64-LQFP (10x10 mm) |
| Số chân | 64 |
| Kiểu lắp đặt | Surface Mount |
| USB Interface | USB 2.0 FS, crystal-less |
| ADC | 1 x 12-bit |
| DAC | 2 x 12-bit |
| LCD Controller | Yes (up to 4x52 segments) |
| I2C Interfaces | 3 |
| SPI Interfaces | 2 |
| USART/UART | USART + UART |
| Timers | Multiple (16-bit and 32-bit) |
| RTC | Yes, with tamper detection |
| Capacitive Touch | S-Touch (TSEP) |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32L073RBT6
| Chân 1 | PC13 — GPIO / Tamper-RTC input |
| Chân 2 | PC14 — GPIO / OSC32_IN |
| Chân 3 | PC15 — GPIO / OSC32_OUT |
| Chân 4 | NRST — Reset input, active low |
| Chân 5 | VDDA — Analog supply |
| Chân 6 | PA0 — GPIO / ADC_IN0 / WKUP1 |
| Chân 7 | PA1 — GPIO / ADC_IN1 |
| Chân 8 | PA2 — GPIO / ADC_IN2 / USART2_TX |
| Chân 9 | PA3 — GPIO / ADC_IN3 / USART2_RX |
| Chân 10 | PA4 — GPIO / ADC_IN4 / SPI1_NSS |
| Chân 11 | PA5 — GPIO / ADC_IN5 / SPI1_SCK |
| Chân 12 | PA6 — GPIO / ADC_IN6 / SPI1_MISO |
| Chân 13 | PA7 — GPIO / ADC_IN7 / SPI1_MOSI |
| Chân 14 | PB0 — GPIO / ADC_IN8 |
| Chân 15 | PB1 — GPIO / ADC_IN9 |
| Chân 16 | PB2 — GPIO / BOOT1 |
| Chân 17 | VSS — Ground |
| Chân 18 | VDD — Digital supply |
| Chân 19 | PB10 — GPIO / I2C2_SCL |
| Chân 20 | PB11 — GPIO / I2C2_SDA |
| Chân 21 | PB12 — GPIO / SPI2_NSS |
| Chân 22 | PB13 — GPIO / SPI2_SCK |
| Chân 23 | PB14 — GPIO / SPI2_MISO |
| Chân 24 | PB15 — GPIO / SPI2_MOSI |
| Chân 25 | PC0 — GPIO / ADC_IN10 |
| Chân 26 | PC1 — GPIO / ADC_IN11 |
| Chân 27 | PC2 — GPIO / ADC_IN12 |
| Chân 28 | PC3 — GPIO / ADC_IN13 |
| Chân 29 | PC4 — GPIO / ADC_IN14 |
| Chân 30 | PC5 — GPIO / ADC_IN15 |
| Chân 31 | PC6 — GPIO |
| Chân 32 | PC7 — GPIO |
| Chân 33 | PC8 — GPIO |
| Chân 34 | PC9 — GPIO |
| Chân 35 | PA8 — GPIO |
| Chân 36 | PA9 — GPIO / USART1_TX |
| Chân 37 | PA10 — GPIO / USART1_RX |
| Chân 38 | PA11 — GPIO / USB_DM |
| Chân 39 | PA12 — GPIO / USB_DP |
| Chân 40 | PA13 — GPIO / SWDIO |
| Chân 41 | VSS — Ground |
| Chân 42 | VDD — Digital supply |
| Chân 43 | PA14 — GPIO / SWCLK |
| Chân 44 | PA15 — GPIO / JTDI |
| Chân 45 | PB3 — GPIO / JTDO / SWO |
| Chân 46 | PB4 — GPIO / NJTRST |
| Chân 47 | PB5 — GPIO |
| Chân 48 | PB6 — GPIO / I2C1_SCL |
| Chân 49 | PB7 — GPIO / I2C1_SDA |
| Chân 50 | BOOT0 — Boot mode selection |
| Chân 51 | PD0 — GPIO / I2C3_SCL |
| Chân 52 | PD1 — GPIO / I2C3_SDA |
| Chân 53 | PD2 — GPIO |
| Chân 54 | PD3 — GPIO / USART2_CTS |
| Chân 55 | PD4 — GPIO / USART2_RTS |
| Chân 56 | PD5 — GPIO / USART2_TX |
| Chân 57 | PD6 — GPIO / USART2_RX |
| Chân 58 | PD7 — GPIO |
| Chân 59 | PE0 — GPIO |
| Chân 60 | PE1 — GPIO |
| Chân 61 | VSS — Ground |
| Chân 62 | VDD — Digital supply |
| Chân 63 | PE2 — GPIO / TRACECLK |
| Chân 64 | PE3 — GPIO / TRACED0 |
Ứng dụng tiêu biểu
STM32L073RBT6 phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Medical Wearable Devices, Smart Meter with LCD Display, USB Charging / Data Logger, Industrial Alarm and Security Panel, Portable Consumer Gadget.
Battery-Powered IoT Sensor Node
The STM32L073RBT6's 0.34 µA Standby current and 0.8 µA Stop RTC current make it an ideal MCU for IoT sensor nodes that must run for years on a coin cell or two-AAA pack. According to ST datasheet, integrated USB 2.0 crystal-less and 12-bit ADC with oversampling remove external components. The 128 KB Flash comfortably hosts LoRaWAN MAC stacks or BLE-via-external-module bridges. The device wakes from RTC interrupt, samples a sensor over I2C or SPI, transmits, and returns to Standby within milliseconds, achieving average current under 5 µA in typical duty-cycled deployments.
Được đề xuất
Medical Wearable Devices
The STM32L073RBT6 is widely deployed in medical wearables thanks to its low-power architecture and integrated S-Touch capacitive sensing for touch buttons and on-body proximity. According to ST datasheet, the on-chip 12-bit ADC supports biosignal acquisition (heart-rate, SpO2 interfacing), while the LCD controller drives small segment displays showing readings directly on the device. Wide 1.65-3.6 V supply support enables single-cell Li-ion or coin-cell power, and the capacitive touch controller eliminates mechanical buttons that wear out or trap fluids, both critical for medical-grade sealing.
Được đề xuất
Smart Meter with LCD Display
For electronic metering applications, the STM32L073RBT6's on-chip LCD controller (up to 4x52 segments) directly drives segmented glass displays commonly seen in electricity, water, and gas meters without external driver chips. According to ST datasheet, the RTC with tamper and calendar supports time-of-use billing and seal-against-tamper signals, while the 12-bit ADC with oversampling achieves metrology-class accuracy when combined with precision current shunts. Standby current below 1 µA allows meter batteries to last the meter's 15+ year service life.
Được đề xuất
USB Charging / Data Logger
Integrated USB 2.0 full-speed with crystal-less operation makes the STM32L073RBT6 ideal for USB-connected data loggers, charging cradles, and PC-tethered instruments. According to ST datasheet, on-chip 3.3 V LDO regulator powers the USB physical layer directly from VBUS (5 V), eliminating the typical external regulator. The 6 KB true EEPROM stores device calibration data and user settings without backup battery, and the 128 KB Flash accommodates full USB class drivers (CDC, HID, DFU) plus the application firmware.
Được đề xuất
Industrial Alarm and Security Panel
The STM32L073RBT6 suits alarm control panels and security keypads thanks to its capacitive touch sensing, RTC tamper input, and low-power operation. According to ST datasheet, the device wakes from keypad touch, processes credentials, controls sirens or relays, and returns to deep sleep between events, extending backup-battery runtime. The 51 available GPIO on the 64-LQFP support multi-zone sensor wiring, keypads, and communication buses (I2C for sensors, SPI for RF modules, USART for cellular modems).
Được đề xuất
Portable Consumer Gadget
For portable consumer gadgets like wireless presenter remotes, RFID tags, or fitness bands, the STM32L073RBT6's ultra-low power, integrated USB charging interface, and capacitive touch buttons create compact, light, single-board designs. According to ST datasheet, the wide supply range supports direct connection to single-cell Li-ion or Li-Poly packs without additional LDO, and the small 64-LQFP footprint (10x10 mm) plus minimal external component count shrink PCB area below 100 mm². The DAC outputs enable audio cues without external amplifier for simple beeps.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32L073RBT6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM32L073RBT3 | STM32L072RBT6 | STM32G073RBT6 | APM32L073RBT6 | STM32L073VBT6 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 100-LQFP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | STMicroelectronics |
| Core | Cortex-M0+ 32 MHz | Cortex-M0+ 32 MHz | Cortex-M0+ 32 MHz | Cortex-M0+ 64 MHz | Cortex-M0+ 32 MHz | Cortex-M0+ 32 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 20 KB | 20 KB | 20 KB | 36 KB | 20 KB | 20 KB |
| USB | USB 2.0 FS, crystal-less | USB 2.0 FS, crystal-less | None | None | USB 2.0 FS | USB 2.0 FS, crystal-less |
| Supply Voltage | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.7 V to 3.6 V | 1.8 V to 3.6 V | 1.65 V to 3.6 V |
| Standby Current | 0.34 µA | 0.34 µA | 0.34 µA | 0.7 µA | ~1 µA | 0.34 µA |
| LCD Controller | Yes (4x52) | Yes (4x52) | Yes (4x52) | No | Yes | Yes (4x52) |
Bảo phân biệt quan trọng
- Lowest-power 64-LQFP STM32L0 with USB crystal-less (vsSTM32L072RBT6)
- Dual on-chip 12-bit DAC channels (vsSTM32F073RBT6)
- 128 KB Flash with wide 1.65 V supply (vsSTM32G073RBT6)
Ghi chú thiết kế
For USB-bus-powered designs, the on-chip 5 V-tolerant USB regulator has 100 mV dropout. According to ST datasheet, place a 4.7 µF bulk capacitor on VBUS and a 100 nF on VDD_ANA within 5 mm. Standby current of 0.34 µA implies a backup-battery CR2032 (220 mAh) can supply the RTC for over 60 years if no source draws from VDD.
Route USB DP/DM as a 90 ohm differential pair with matched lengths within 0.5 mm. Place the 22 ohm series resistors within 8 mm of the connector. Keep crystal traces (PC14/PC15 for LSE, PA8/PA9 optional HSE) short and guard with a ground pour. Apply a four-layer PCB stack-up with continuous ground plane below the MCU for EMC compliance.
Estimated: enabling the LCD controller without a display connected can cause ground noise; always provide a defined load or disable the SLIDE bit. The USB 48 MHz internal oscillator does not work with explicit clock-stretching I2C devices; verify the connected slave's tLOW and tHIGH match the L0 USB recovery timing. Avoid 5 V input on any GPIO - this part is NOT 5 V tolerant.
Provide separate analog (VDDA) and digital (VDD) supply rails, joined at one point (star ground) near the MCU. Add a ferrite bead between VDD and VDDA for ADC noise rejection. Place the USART/UART routing in the outer PCB layers to minimize reflection on high-speed edge rates. Avoid right-angle signal traces on USB, SPI, and high-frequency buses.
Thông tin tuân thủ
RoHS and REACH compliant per ST product page datasheet DS10688. Not AEC-Q100 - automotive options exist in STM32L073RBT6A variant per ST portfolio. Lead-free reflow-compatible.
