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STMicroelectronics STM32L073CBT6
- Part No.:
- STM32L073CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L073CBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:602
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Product details
Overview
STM32L073CBT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP48 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps, 16 channels), and dual 12-bit DACs with output buffers - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L073CBT6 datasheet, STM32L073CBT6 pinout, STM32L073CBT6 application, or STM32L073CBT6 equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), 5 µs Flash wakeup time, and integrated LCD driver supporting up to 4×52 segments.
Technical Context
The STM32L073CBT6 implements a dual-bank Flash architecture enabling read-while-write operation and hardware ECC for reliability. Its clock system integrates factory-trimmed 16 MHz HSI RC (+/−1%), self-calibrating 48 MHz HSI48 for USB, and low-power 37 kHz LSI for RTC - all managed via programmable voltage detector (PVD) and ultra-low-power brownout reset (BOR) with five thresholds.
Peripheral interconnect uses a multi-layer AHB/APB matrix supporting concurrent DMA transfers across ADC, USART, SPI, I²C, DAC, and timers. The device supports dynamic voltage scaling (DVS) across Run, Low-power Run, Sleep, Stop, and Standby modes - with dedicated ultra-low-power timer (LPTIM) and two windowed/standalone watchdogs for safety-critical firmware supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables 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 field firmware updates without data loss. |
| Power Modes | 0.29 µA Standby (3 wake pins), 0.43 µA Stop (16 wake lines), 0.86 µA Stop+RTC+20KB RAM retention - extends coin-cell battery life to >10 years. |
| Analog | 12-bit ADC (1.14 Msps, 16 ch, down to 1.65 V), 2×12-bit DACs (buffered, down to 1.8 V), 2×ULP comparators - enables precision sensor signal chain without external components. |
| Connectivity | USB 2.0 crystal-less (LPM, battery charging detect), 4×USART (2 ISO 7816/IrDA), 6×SPI (16 Mbps), 3×I²C (2 SMBus/PMBus) - supports secure wired telemetry and legacy protocol bridging. |
| Timers | 11 timers including 2×16-bit (4-ch), 2×16-bit (2-ch), LPTIM, SysTick, RTC, 2×watchdogs - provides synchronized PWM, pulse counting, and time-stamped event logging. |
| LCD Driver | Supports up to 4×52 or 8×48 segments with on-board step-up converter and contrast adjustment - eliminates external LCD bias IC in portable displays. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified. Pin count: 48 leads; 42 general-purpose I/Os (37 of which are 5V-tolerant), 3 dedicated power/ground, 3 debug (SWDIO/SWCLK/NRST).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain separation; supports 1.65–3.6 V operation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/O | 42 GPIOs with configurable pull-up/down, alternate functions, and 5V tolerance on 37 pins - simplifies level-shifting in mixed-voltage systems. |
| PA11/PA12 | USB D+/D− | Dedicated crystal-less USB 2.0 interface - eliminates external oscillator and reduces BOM cost and board area. |
| PA0, PA1, PA4, PA5, PA6, PA7, PB0, PB1, PC0–PC5, PC13–PC15, PD2 | Wake-up inputs | 16 dedicated Stop-mode wake lines plus 3 Standby-mode wake pins - enables selective peripheral-triggered resume without CPU polling. |
| PA13/PA14 | SWDIO/SWCLK | 2-pin Serial Wire Debug interface - allows full programming, tracing, and real-time register inspection during ultra-low-power operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable brownout thresholds (1.62–2.5 V) - ensures reliable reset across wide battery discharge curves. |
| Self-calibrating HSI48 | 48 MHz RC oscillator calibrated to ±0.25% for USB timing - removes need for external crystal while meeting USB full-speed spec. |
| Capacitive sensing | 24-channel TSC supporting touchkey/linear/rotary sensors - enables intuitive HMI in wearables without external controller. |
| True RNG | Hardware entropy source compliant with NIST SP800-90B - provides cryptographically secure keys for TLS handshake and firmware signing. |
| Firewall protection | Memory protection unit (MPU) + code isolation barriers - prevents unauthorized access to secure boot and cryptographic keys. |
Applications
| Portable Medical Sensor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/temperature monitoring in wearable patch using coin-cell battery. IC Role / Device Role / Timing Role: Main MCU executing sensor fusion, BLE packetization, and ultra-low-power sleep scheduling with RTC wake every 10 s. Use Value: 0.29 µA Standby current and 5 µs Flash wakeup enable >5-year battery life with periodic measurement bursts. | Use Scenario: Battery-backed gas/water meter with hourly RF transmission and tamper detection. IC Role / Device Role / Timing Role: System controller managing metrology ADC sampling, EEPROM data logging, and LoRaWAN stack timing. Use Value: 6 KB EEPROM with ECC retains 10+ years of consumption history; Stop+RTC+RAM mode consumes only 0.86 µA. |
| Industrial Data Logger | Low-Power Display Terminal |
Use Scenario: Remote environmental logger (temp/humidity/pressure) powered by solar harvester. IC Role / Device Role / Timing Role: Central processor acquiring analog inputs via 12-bit ADC, storing to EEPROM, and waking USB host for data dump. Use Value: 12-bit ADC accuracy (±1 LSB INL) and 1.14 Msps sampling support high-resolution trend analysis without oversampling. | Use Scenario: Handheld asset tracker with segmented LCD showing location, battery, and status icons. IC Role / Device Role / Timing Role: Integrated LCD controller driving 4×52 segments with on-board step-up converter and blinking control. Use Value: Eliminates external LCD bias IC and reduces component count by 3–4 parts while maintaining display contrast over full temperature range. |
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 |
|---|---|---|---|
| STM32L072CBT6 | No USB interface; same Flash/RAM/EEPROM, identical low-power specs and peripherals except USB/LCD. | Suitable where USB connectivity is unnecessary and cost reduction is critical. | Select when USB host/device functionality is omitted and BOM cost must be minimized. |
| STM32L432KCU6 | Cortex-M4F core (100 MHz), 256 KB Flash, 64 KB SRAM, no EEPROM, higher active current (81 µA/MHz), includes FPU and AES. | Better for compute-intensive tasks (FFT, encryption) but requires larger battery or energy harvesting. | Choose when floating-point math or hardware crypto acceleration outweighs ultra-low-power priority. |
Compared with STM32L072CBT6, the STM32L073CBT6 adds crystal-less USB and LCD driver - critical for portable diagnostics and display terminals; versus STM32L432KCU6, it trades processing headroom for 3× lower standby current and integrated EEPROM - essential for decade-long unattended deployments.
Availability
STM32L073CBT6 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial data loggers, and low-power display terminals requiring stable component supply across extended product lifecycles.
Supply support for STM32L073CBT6 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog devices for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust security, and rich analog integration - optimized for wearables, IoT edge nodes, and energy-harvesting systems.
FAQ
What is the maximum operating frequency and core type of the STM32L073CBT6?
The STM32L073CBT6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It delivers 0.95 DMIPS per MHz and includes a Memory Protection Unit (MPU) for secure task isolation. The core operates across the full 1.65–3.6 V supply range and supports dynamic voltage scaling to optimize power versus performance in real-time applications.
Does the STM32L073CBT6 support crystal-less USB operation?
Yes - the STM32L073CBT6 integrates a self-calibrating 48 MHz HSI48 RC oscillator that meets USB Full-Speed (12 Mbps) timing requirements without an external crystal. This feature enables crystal-less USB 2.0 operation with battery charging detection and link power management, reducing BOM cost and PCB footprint in portable designs.
How much EEPROM is available and what is its endurance specification?
The STM32L073CBT6 includes 6 KB of on-chip data EEPROM with built-in ECC protection. According to ST's DS10685 Rev 7, it guarantees 100,000 write/erase cycles and 20-year data retention at 55 °C - validated under industrial temperature conditions and suitable for long-term calibration storage and event logging.
Which low-power modes provide RTC and RAM retention, and what are their typical currents?
The STM32L073CBT6 supports RTC + 20 KB RAM retention in Stop mode at 0.86 µA (typical, VDD = 3.0 V, TA = 25 °C). Standby mode offers lowest power (0.29 µA) but retains only backup registers and RTC - no SRAM. Both modes support multiple wake sources including EXTI lines, RTC alarms, and comparator events, enabling flexible power-state orchestration.
STM32L073CBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 37
- 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 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073CBT6 FAQ
1.How can I place an order for STM32L073CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073CBT6 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 STM32L073CBT6 reliable?
The price and inventory of STM32L073CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073CBT6 is usually 5 days.
3.What payment methods are accepted for STM32L073CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073CBT6?
STM32L073CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073CBT6 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 STM32L073CBT6?
For technical support, including STM32L073CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073CBT6 requirements.
6.How does Aetrix verify that STM32L073CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L073CBT6 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 STM32L073CBT6 meets industry standards.
7.What is the process for return or replacement of STM32L073CBT6?
All STM32L073CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073CBT6, 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 STM32L073CBT6 part is unused and in its original packaging.
Return procedure for STM32L073CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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