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STMicroelectronics STM32L073RZT3
- Part No.:
- STM32L073RZT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L073RZT3.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
STM32L073RZT3 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 driver (up to 4×52 segments), and capacitive touch sensing - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L073RZT3 datasheet, STM32L073RZT3 pinout, STM32L073RZT3 application, or STM32L073RZT3 equivalent, key selection criteria include standby current (0.29 µA), RTC-enabled Stop mode (0.86 µA), 5V-tolerant I/O count (78 pins), USB crystal-less operation, and LCD segment drive capability - all validated for extended-life embedded systems operating from 1.65 V to 3.6 V.
Technical Context
The STM32L073RZT3 implements a dual-bank Flash architecture with ECC and read-while-write capability, enabling safe firmware updates without halting execution. Its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting dynamic voltage scaling across Run, Low-power Run, Sleep, Stop, and Standby modes.
Analog subsystem integration includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability (down to 1.65 V), and a 12-bit ADC with up to 16 channels and hardware oversampling - all accessible via 7-channel DMA with configurable priority and transfer triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz - enables real-time control with deterministic interrupt latency in ultra-low-power contexts. |
| Memory | 192 KB Flash (ECC, dual-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC) - supports secure firmware storage, RAM-retentive Stop mode, and wear-leveling for parameter logging. |
| Power Consumption | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - extends coin-cell battery life beyond 10 years in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs (buffered, 1.8 V min), 2×ULP comparators - enables simultaneous sensor signal conditioning, analog output generation, and threshold-triggered wake-up. |
| Connectivity | USB 2.0 crystal-less (LPM, battery charging detection), 4×USART (2 ISO 7816/IrDA), 6×SPI (16 Mbit/s), 3×I2C (2 SMBus/PMBus) - eliminates external crystal for USB, simplifies smart-card and sensor bus integration. |
| Specialized IP | LCD controller (4×52 / 8×48 segments), 24-channel capacitive touch sensing (TSC), CRC unit, true RNG, 96-bit UID - enables direct display driving and touch UI without external controllers. |
| Package & I/O | LQFP100 (14×14 mm), 84 fast I/Os (78 5V-tolerant) - provides high peripheral density and robust interfacing to legacy 5V logic and industrial sensors. |
Pinout & Package
LQFP100 package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified - suitable for automated SMT assembly and thermally demanding industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per datasheet layout guidelines. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15, PH0–PH1 | General-purpose I/O | 78 pins support 5V tolerance; multiple alternate functions (ADC, DAC, USART, SPI, I2C, USB, LCD, TSC) mapped per port register. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PD0–PD7, PH0, PH1 | LCD segment/common drivers | Supports static, 2/3/4-mux LCD with contrast adjustment and blinking; internal step-up converter enables single-supply LCD bias. |
| PA0, PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PD0–PD7, PH0, PH1 | Capacitive sensing channels | 24-channel TSC supports touchkey, linear, and rotary sensors with hardware-accelerated acquisition and noise filtering. |
| PA11, PA12 | USB D+/D− | Crystal-less USB 2.0 interface with built-in transceiver, battery charging detection, and link power management - no external oscillator needed. |
| PA4, PA5, PA6, PA7, PB0, PB1 | DAC1_OUT1, DAC1_OUT2, DAC2_OUT1, DAC2_OUT2 | Buffered 12-bit outputs operable down to 1.8 V; each DAC supports trigger-based updates and noise reduction modes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode with RTC + full RAM retention | 0.86 µA - enables time-stamped sensor logging during multi-year battery operation without data loss. |
| Crystal-less USB 2.0 interface | Eliminates external 48 MHz crystal and associated load capacitors - reduces BOM cost and PCB area by ≥3 components. |
| Hardware-accelerated capacitive touch sensing (TSC) | 24-channel acquisition with built-in charge transfer, filtering, and baseline tracking - removes need for external touch controller IC. |
| Dual independent 12-bit DACs with output buffers | Simultaneous analog output generation at different voltages/frequencies - supports closed-loop control of multiple actuators from one MCU. |
| Embedded 6 KB EEPROM with ECC | Endurance >300k cycles, data retention >20 years at 85°C - replaces external serial EEPROM in calibration-critical applications. |
Applications
| Portable Medical Sensor | Smart Utility Meter |
|---|---|
|
Use Scenario: Wearable ECG patch acquiring analog biopotentials, performing on-device QRS detection, and transmitting alerts via BLE (via external transceiver). IC Role / Device Role / Timing Role: Main controller executing signal processing, managing ultra-low-power sleep/wake cycles, driving segmented LCD for local status, and buffering sensor data in retained RAM. Use Value: 0.29 µA Standby current and 5 µs Flash wakeup enable responsive event-driven operation while extending battery life to >3 years on CR2032. |
Use Scenario: Battery-backed gas/water meter recording flow pulses, temperature, and pressure at 15-minute intervals with tamper detection. IC Role / Device Role / Timing Role: System-on-chip handling pulse counting, RTC timestamping, EEPROM-based calibration storage, LCD display, and secure data logging with CRC. Use Value: 6 KB on-chip EEPROM with ECC ensures reliable long-term storage of metrology coefficients without external memory failure risk. |
| Industrial Data Logger | Low-Power Human-Machine Interface (HMI) |
|
Use Scenario: Remote environmental monitor logging temperature, humidity, and CO₂ every 10 minutes using I²C sensors and transmitting daily summaries via LoRaWAN. IC Role / Device Role / Timing Role: Central data aggregator with 12-bit ADC for analog sensor inputs, 7-channel DMA for concurrent peripheral servicing, and USB for field configuration. Use Value: Dual-bank Flash with RWW allows seamless firmware updates over USB without interrupting sensor acquisition or RTC timekeeping. |
Use Scenario: Touch-enabled control panel for HVAC or lighting with segmented LCD display and capacitive buttons/knobs. IC Role / Device Role / Timing Role: Single-chip HMI controller driving LCD segments, scanning 24-channel TSC, generating DAC reference voltages, and managing user input state. Use Value: Integrated LCD + TSC + DAC eliminates 3 external ICs, reducing bill-of-materials and improving ESD robustness in consumer-facing enclosures. |
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 |
|---|---|---|---|
| STM32L072RZT6 | Same package and pinout; lacks USB and LCD controller; 128 KB Flash, no DACs | Suitable for non-display, non-USB sensor nodes where cost reduction outweighs feature loss | Select when USB connectivity and analog output generation are unnecessary - saves ~15% unit cost. |
| STM32L433RCT6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM; higher active power (81 µA/MHz), no crystal-less USB | Better for floating-point math (e.g., FFT-based vibration analysis) but requires external crystal for USB and higher quiescent current | Choose only if DSP performance or larger RAM is mandatory - trade-off is 2.8× higher Run-mode current and added BOM complexity. |
Compared with STM32L073RZT3, the STM32L072RZT6 sacrifices USB and LCD to reduce cost and die size, while the STM32L433RCT6 trades ultra-low-power efficiency for Cortex-M4F compute capability - neither matches the unique combination of crystal-less USB, on-chip LCD, EEPROM, and sub-µA Stop mode.
Availability
STM32L073RZT3 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial data loggers, and low-power HMIs requiring stable component supply across multi-year production cycles.
Supply support for STM32L073RZT3 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 automotive semiconductors since 1987.
The STM32L0 series targets ultra-low-power embedded applications - optimized for battery-operated devices requiring decade-long operation, secure firmware updates, and rich analog integration without external support components.
FAQ
What is the minimum operating voltage for the STM32L073RZT3's 12-bit ADC?
The 12-bit ADC operates down to 1.65 V supply voltage, maintaining full 1.14 Msps sampling rate and 12-bit linearity per DS10685 Rev 7 Section 6.3.15. This enables accurate sensor readings even as battery voltage declines in coin-cell-powered designs.
Does the STM32L073RZT3 support hardware encryption or secure boot?
No - the STM32L073RZT3 does not include AES, PKA, or secure boot engines. It features a true random number generator (TRNG) and firewall protection for memory isolation, but cryptographic acceleration and root-of-trust features require the STM32L5 or STM32U5 series.
Can the internal 48 MHz RC oscillator (HSI48) be used reliably for USB communication?
Yes - the HSI48 is factory-calibrated and self-trimmed against USB SOF timing, achieving ±0.25% accuracy over temperature and voltage per Section 6.3.8. It eliminates the need for an external 48 MHz crystal while meeting USB 2.0 full-speed timing requirements.
How many I/O pins support 5V tolerance on the STM32L073RZT3 in LQFP100 package?
78 of the 84 general-purpose I/O pins are 5V tolerant, as confirmed in Table 2 and Section 3.7 of DS10685 Rev 7. This allows direct interfacing with legacy 5V peripherals such as RS-232 transceivers, industrial sensors, and discrete logic without level shifters.
STM32L073RZT3 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:
- 192KB (192K 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073RZT3 FAQ
1.How can I place an order for STM32L073RZT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073RZT3 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 STM32L073RZT3 reliable?
The price and inventory of STM32L073RZT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073RZT3 is usually 5 days.
3.What payment methods are accepted for STM32L073RZT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073RZT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073RZT3?
STM32L073RZT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073RZT3 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 STM32L073RZT3?
For technical support, including STM32L073RZT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073RZT3 requirements.
6.How does Aetrix verify that STM32L073RZT3 is sourced from the original manufacturer or authorized distributors?
All STM32L073RZT3 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 STM32L073RZT3 meets industry standards.
7.What is the process for return or replacement of STM32L073RZT3?
All STM32L073RZT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073RZT3, 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 STM32L073RZT3 part is unused and in its original packaging.
Return procedure for STM32L073RZT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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