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STMicroelectronics STM32L073CZT6
- Part No.:
- STM32L073CZT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L073CZT6.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,310
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Product details
Overview
STM32L073CZT6 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 industrial sensors and portable medical monitors requiring sub-100 µA/MHz active current and RTC-backed standby.
For engineers reviewing the STM32L073CZT6 datasheet, STM32L073CZT6 pinout, STM32L073CZT6 application, or STM32L073CZT6 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + 20-KB RAM retention, 5 µs Flash wakeup time, 78 I/Os (72 5V-tolerant), USB crystal-less operation, and LCD driver supporting up to 4×52 segments - all validated across -40°C to +125°C operation.
Technical Context
The STM32L073CZT6 integrates a Cortex-M0+ core with MPU, operating from 32 kHz to 32 MHz, delivering 0.95 DMIPS/MHz. Its clock system includes factory-trimmed 16 MHz HSI (±1%), self-calibrating 48 MHz HSI for USB, 32 kHz LSE for RTC, and multispeed MSI (65 kHz–4.2 MHz) for dynamic voltage scaling.
Analog subsystem comprises two ultra-low-power comparators (1.65 V min), 12-bit ADC with hardware oversampling, dual buffered 12-bit DACs (1.8 V min), and integrated temperature sensor with factory calibration. Power management supports five low-power modes, including Standby (0.29 µA) with three wakeup pins and Stop + RTC (0.86 µA) with full RAM retention.
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 ultra-low power budget. |
| Memory | 192 KB Flash (ECC, 2-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC) - supports firmware updates without data loss and robust data logging. |
| Power Modes | 0.29 µA Standby, 0.43 µA Stop, 0.86 µA Stop+RTC+20KB RAM - sustains decade-scale battery life in always-on sensing nodes. |
| ADC | 12-bit, 1.14 Msps, 16-channel, down to 1.65 V supply - captures high-fidelity analog signals in low-voltage battery systems. |
| DAC | 2× 12-bit buffered outputs, 1.8 V min operation - drives precision analog actuators or reference voltages without external op-amps. |
| USB | USB 2.0 Full-Speed, crystal-less, battery charging detection - eliminates external crystal and simplifies BOM for portable USB peripherals. |
| I/O | 48-pin LQFP, 78 total I/Os (72 5V-tolerant), 24 capacitive sensing channels - enables direct interfacing with legacy 5V logic and touch UIs. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 1.65–3.6 V supply rails; separate analog/digital domains enable noise-isolated mixed-signal operation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/O | 78 total GPIOs (72 5V-tolerant); support 16 alternate functions per port including USB, ADC, DAC, timers, and LCD segment drivers. |
| PA1, PA2, PA3 | USB D+, D−, ID | Crystal-less USB interface; ID pin enables OTG host/peripheral detection without external circuitry. |
| PA0, PB12–PB15 | ADC IN0–IN16, DAC OUT1/OUT2 | Direct connection to 12-bit ADC inputs and buffered DAC outputs - no external signal conditioning required for sensor readout or analog output. |
| PC13–PC15 | RTC oscillator (LSE) | Supports 32.768 kHz crystal for ±20 ppm RTC accuracy over -40°C to +85°C - critical for time-stamped telemetry. |
| NRST | Active-low reset | Programmable reset threshold via PVD; supports brownout reset with 5 selectable thresholds for robust power fail recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power LCD controller | Drives up to 4×52 or 8×48 segments with on-board step-up converter and contrast adjustment - eliminates external LCD bias supply. |
| Integrated true RNG & firewall | Hardware entropy source and memory protection unit (MPU) - meets IEC 62443-3-3 requirements for secure firmware updates. |
| Pre-programmed USB/USART bootloader | Factory-loaded ROM bootloader enables field firmware updates over USB or UART without debugger - reduces production test overhead. |
| Capacitive touch sensing (TSC) | 24-channel hardware-accelerated TSC with built-in de-bounce and proximity detection - supports touchkey, slider, and rotary controls with <5 µA active current. |
| Serial wire debug (SW-DP) | Single-wire debug interface with trace capability - enables real-time code profiling and low-pin-count development without JTAG header. |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter with hourly pressure/flow sampling, LoRaWAN transmission, and tamper-detection alerts. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (ADC), secure data encryption (RNG + firewall), RTC-based scheduling, and low-power LoRa modulation (via USART/SPI). Use Value: 0.43 µA Stop mode extends 10-year battery life; 12-bit ADC resolves <0.1% flow variation; USB bootloader enables remote firmware patches. | Use Scenario: ECG patch with dry-electrode sensing, real-time QRS detection, Bluetooth LE streaming, and rechargeable coin-cell operation. IC Role / Device Role / Timing Role: Analog front-end processor acquiring ECG (ADC), generating pacing reference (DAC), driving OLED display (LCD controller), and managing BLE timing (LPTIM + RTC). Use Value: Dual 12-bit DACs produce precise lead-II reference waveforms; 24-channel TSC detects electrode contact quality; 0.86 µA Stop+RTC preserves session state during sleep. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: Vibration/temperature node in predictive maintenance system, sampling every 5 seconds, storing FFT coefficients in EEPROM, transmitting via NB-IoT. IC Role / Device Role / Timing Role: Edge AI inference accelerator (Cortex-M0+ running TinyML), EEPROM-based firmware rollback, and NB-IoT modem interface (USART + SPI). Use Value: 6 KB EEPROM retains calibrated sensor models across power cycles; 78 GPIOs route multiple sensor interfaces; USB crystal-less simplifies certification. | Use Scenario: Handheld blood glucose meter with electrochemical strip interface, LCD display, USB-C charging, and audit-log storage. IC Role / Device Role / Timing Role: Electrochemical signal conditioner (ADC + DAC for bias voltage), LCD segment driver, USB battery charging detector, and secure log writer (firewall-protected EEPROM). Use Value: 12-bit ADC achieves ±1 mg/dL glucose resolution; crystal-less USB detects charger presence without extra IC; 20-byte backup registers store last-measurement timestamp. |
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 |
|---|---|---|---|
| STM32L072CZT6 | Same package and core, but 128 KB Flash, no USB, no LCD driver | Suitable for cost-sensitive sensor nodes without display or USB connectivity | Select when USB/LCD are unnecessary and Flash >128 KB is not required. |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM, higher active current (81 µA/MHz) | Better for floating-point math (e.g., motor control), but lacks EEPROM and ultra-low-power RTC retention | Choose for DSP-intensive tasks where 0.86 µA Stop+RTC is less critical than compute throughput. |
Compared with STM32L073CZT6, STM32L072CZT6 reduces BOM cost by removing USB/LCD while retaining identical low-power profile; STM32L432KCU6 trades 3× higher active current for Cortex-M4F performance and larger memory, making it unsuitable for multi-year battery applications but viable for AC-powered edge devices needing real-time signal processing.
Availability
STM32L073CZT6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across extended product lifecycles.
Supply support for STM32L073CZT6 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, MEMS, and automotive semiconductors.
The STM32L0 series targets ultra-low-power embedded applications - optimized for battery longevity, environmental resilience (-40°C to +125°C), and integration of analog peripherals (ADC/DAC/LCD/TSC) in compact packages.
FAQ
What is the maximum operating frequency and core type of the STM32L073CZT6?
The STM32L073CZT6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. It supports dynamic voltage scaling and multiple clock sources - including factory-trimmed 16 MHz HSI (±1%), self-calibrating 48 MHz HSI for USB, and 32 kHz LSE - enabling precise frequency control across all low-power modes.
Does the STM32L073CZT6 support crystal-less USB operation?
Yes, the STM32L073CZT6 integrates a self-calibrating 48 MHz HSI oscillator dedicated to USB 2.0 Full-Speed operation, eliminating the need for an external crystal. It also includes battery charging detection circuitry compliant with USB Battery Charging Specification v1.2, enabling direct USB-C port integration without additional ICs.
How much EEPROM is available, and what is its endurance rating?
The STM32L073CZT6 includes 6 KB of on-chip data EEPROM with built-in ECC, rated for 100,000 write/erase cycles and 20-year data retention at 55°C. This memory is mapped into the address space and accessible via standard flash programming APIs, enabling robust parameter storage and firmware rollback without external serial EEPROM.
What are the key low-power mode current specifications?
In Standby mode, the STM32L073CZT6 draws 0.29 µA with three wakeup pins enabled; in Stop mode, it consumes 0.43 µA with 16 wakeup lines; and in Stop mode with RTC and 20 KB RAM retention, current is 0.86 µA. All values are measured at 3.0 V and 25°C, with full specification coverage from -40°C to +125°C per DS10685 Rev 7.
STM32L073CZT6 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:
- 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 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073CZT6 FAQ
1.How can I place an order for STM32L073CZT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073CZT6 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 STM32L073CZT6 reliable?
The price and inventory of STM32L073CZT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073CZT6 is usually 5 days.
3.What payment methods are accepted for STM32L073CZT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073CZT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073CZT6?
STM32L073CZT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073CZT6 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 STM32L073CZT6?
For technical support, including STM32L073CZT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073CZT6 requirements.
6.How does Aetrix verify that STM32L073CZT6 is sourced from the original manufacturer or authorized distributors?
All STM32L073CZT6 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 STM32L073CZT6 meets industry standards.
7.What is the process for return or replacement of STM32L073CZT6?
All STM32L073CZT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073CZT6, 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 STM32L073CZT6 part is unused and in its original packaging.
Return procedure for STM32L073CZT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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