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STMicroelectronics STM32L073RBT6
- Part No.:
- STM32L073RBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L073RBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
STM32L073RBT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM, featuring integrated USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), LCD controller (up to 4×52 segments), and capacitive touch sensing - deployed in battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L073RBT6 datasheet, STM32L073RBT6 pinout, STM32L073RBT6 application, or STM32L073RBT6 equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less operation, 78 I/Os (5V-tolerant), and ECC-protected Flash/SRAM for mission-critical embedded control.
Technical Context
The STM32L073RBT6 implements a dual-bank Flash architecture with read-while-write capability and ECC protection, enabling safe firmware updates without halting execution. Its clock system integrates factory-trimmed 16 MHz HSI, self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC - supporting dynamic voltage scaling across Run, Sleep, Low-power Run, Stop, and Standby modes.
Low-power operation is enforced by dedicated peripherals: ultra-low-power comparators (wakeup capable down to 1.65 V), LPTIM for precise timing below 1 µA, and hardware-accelerated AES-128 + True RNG for secure boot. The interconnect matrix enables concurrent DMA transfers across ADC, DAC, USART, SPI, and timers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - delivers deterministic real-time control at sub-100 µA/MHz efficiency. |
| Memory | 192 KB Flash (ECC, dual-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC) - supports robust firmware updates and data logging with error correction. |
| Power Modes | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - enables multi-year battery life in metering applications. |
| Analog | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs (buffered, down to 1.8 V), 2×ULP comparators - enables high-fidelity sensor signal chain and analog output control. |
| Connectivity | USB 2.0 crystal-less (LPM, battery charging detect), 4×USART (2 ISO 7816/IrDA), 6×SPI (16 Mbit/s), 3×I²C (2 SMBus/PMBus) - supports secure wired communication without external clock components. |
| Peripherals | LCD driver (4×52/8×48 seg), 24-channel TSC, 11×timers (incl. LPTIM, RTC, SysTick), 7-channel DMA - integrates human interface and timing functions in compact designs. |
| Package | LQFP64 (10×10 mm), 64-pin, ECOPACK2-compliant - compatible with standard PCB assembly and industrial thermal requirements. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed pad, rated for -40 °C to +125 °C operation and qualified per AEC-Q100 Grade 1 for automotive-adjacent industrial use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual-supply domain: VDD powers core/peripherals (1.65–3.6 V); separate VDDA ensures ADC/DAC reference stability. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/O | 78 of 84 I/Os are 5V-tolerant; configurable as GPIO, EXTI, or 24-channel capacitive touch inputs (TSC). |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 interface with built-in transceiver and battery charging detection - eliminates external oscillator and reduces BOM cost. |
| PC13/PC14/PC15 | RTC oscillator inputs | Supports 32.768 kHz external crystal for precision RTC timekeeping with calibration register (±20 ppm typical accuracy). |
| PA4–PA7, PB0–PB1, PC0–PC7 | LCD segment/common drivers | Drives up to 4×52 or 8×48 LCD segments with on-board step-up converter and contrast control - enables direct LCD integration without external bias IC. |
| PA1–PA3, PA5–PA8, PB0–PB1, PC0–PC5 | ADC/DAC/Comparator channels | 16-channel ADC input (12-bit, 1.14 Msps), 2×DAC outputs (buffered, rail-to-rail), 2×ULP comparators with window mode - forms complete analog front-end. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.29 µA with 3 wakeup pins active - extends battery life in intermittent-sensing applications like smart utility meters. |
| Crystal-less USB | Integrated 48 MHz HSI48 with self-calibration against USB SOF - removes external crystal and matching capacitors, reducing component count by ≥3. |
| ECC memory protection | Hardware ECC on Flash and SRAM detects/corrects single-bit errors and detects double-bit errors - prevents silent data corruption in safety-critical firmware/data storage. |
| Capacitive touch controller | 24-channel TSC with hardware-accelerated acquisition and noise immunity - enables robust touchkey/rotary control in humid or noisy industrial environments. |
| Secure boot foundation | True RNG + AES-128 + firewall protection + 96-bit unique ID - provides cryptographic primitives for secure firmware authentication and anti-cloning. |
Applications
| Smart Utility Meter | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered electricity/water/gas meter with hourly data logging, tamper detection, and RF communication. IC Role / Device Role / Timing Role: Main controller managing ADC sampling (current/voltage), RTC timestamping, EEPROM data storage, and low-power wakeups via pulse input or timer. Use Value: 0.29 µA Standby current and 5 µs Flash wakeup enable >10-year battery life; ECC Flash ensures firmware integrity over decades of field operation. | Use Scenario: Handheld ECG or SpO₂ monitor requiring analog signal acquisition, display, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Signal processor interfacing with 12-bit ADC (ECG front-end), driving segmented LCD, generating DAC reference voltages, and managing USB charging detection. Use Value: Integrated LCD driver and crystal-less USB eliminate external bias IC and oscillator - shrinking PCB area by >15% while maintaining clinical-grade analog accuracy. |
| Industrial Sensor Node | Asset Tracking Beacon |
Use Scenario: Wireless temperature/humidity/pressure node in factory automation, reporting via LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Sensor aggregator with 12-bit ADC (multi-channel), ultra-low-power comparators (threshold alerts), and LPTIM-based duty-cycled radio control. Use Value: 0.43 µA Stop mode + 16 wakeup lines allows event-driven wakeups (e.g., temp threshold breach) with <1 µA average current - enabling 5+ year coin-cell operation. | Use Scenario: GPS-denied indoor asset tracker using BLE beaconing and motion-triggered location updates. IC Role / Device Role / Timing Role: Motion-aware controller using TSC for tap detection, RTC for scheduled beacons, and USB for configuration/firmware update. Use Value: 24-channel capacitive touch + 93 µA/MHz Run efficiency enables responsive UI and long runtime - achieving >2 years on CR2032 with daily BLE broadcast. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L072RBT6 | No USB interface, no LCD controller, same core/memory/peripherals otherwise | Suitable for non-USB, non-display applications where cost reduction is critical | Select when USB/LCD are unused - saves ~$0.30/unit and simplifies layout. |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM, higher active power (110 µA/MHz) | Better for DSP-intensive tasks (e.g., FFT-based vibration analysis) but requires larger battery | Choose only if floating-point math or higher throughput justifies 3× higher Run current and loss of EEPROM. |
Compared with STM32L072RBT6, the STM32L073RBT6 adds USB and LCD at minimal cost premium; versus STM32L432KCU6, it trades computational headroom for 3× lower active power and integrated EEPROM - making it optimal for long-life, mixed-signal edge nodes.
Availability
STM32L073RBT6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L073RBT6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust security, and high peripheral integration - optimized for metering, wearables, and IoT edge nodes.
FAQ
What is the maximum operating temperature range for STM32L073RBT6?
The STM32L073RBT6 is specified for continuous operation from -40 °C to +125 °C ambient temperature. This rating applies to all LQFP64 variants and is validated per JEDEC JESD22-A108, enabling deployment in under-hood automotive-adjacent industrial enclosures and outdoor metering housings.
Does STM32L073RBT6 support hardware encryption?
Yes - it integrates a true random number generator (TRNG), AES-128 accelerator, and memory firewall protection. These features enable secure boot, firmware signature verification, and encrypted data storage without external crypto ICs, meeting IEC 62443-3-3 SL2 requirements for industrial devices.
Can the internal 48 MHz RC oscillator be used reliably for USB communication?
Yes - the HSI48 oscillator undergoes automatic self-calibration against the USB Start-of-Frame (SOF) token every millisecond, maintaining ±0.25% frequency accuracy required for full-speed USB 2.0 compliance without any external crystal or trimming components.
How many I/O pins are 5V-tolerant on STM32L073RBT6?
78 of the 84 general-purpose I/O pins are 5V-tolerant (excluding BOOT0, NRST, and analog-only pins). This allows direct interfacing with legacy 5V logic, industrial sensors, and displays without level-shifting circuitry - verified per IEC 61000-4-2 ESD testing up to ±8 kV contact discharge.
STM32L073RBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073RBT6 FAQ
1.How can I place an order for STM32L073RBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073RBT6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32L073RBT6 reliable?
The price and inventory of STM32L073RBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073RBT6 is usually 5 days.
3.What payment methods are accepted for STM32L073RBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073RBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073RBT6?
STM32L073RBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073RBT6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32L073RBT6?
For technical support, including STM32L073RBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073RBT6 requirements.
6.How does Aetrix verify that STM32L073RBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L073RBT6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L073RBT6 meets industry standards.
7.What is the process for return or replacement of STM32L073RBT6?
All STM32L073RBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073RBT6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32L073RBT6 part is unused and in its original packaging.
Return procedure for STM32L073RBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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