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STMicroelectronics STM32L073CZT3
- Part No.:
- STM32L073CZT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L073CZT3.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
STM32L073CZT3 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, integrated LCD driver (up to 4×52 segments), USB 2.0 crystal-less interface, and dual 12-bit DACs - deployed in battery-powered industrial sensors and portable medical devices requiring sub-1 µA Stop mode operation.
For engineers reviewing the STM32L073CZT3 datasheet, STM32L073CZT3 pinout, STM32L073CZT3 application, or STM32L073CZT3 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + 20-KB RAM retention, 12-bit ADC at 1.14 Msps (16 channels), USB crystal-less timing tolerance, and UFBGA48 package compatibility with 5V-tolerant I/Os on selected pins.
Technical Context
The STM32L073CZT3 implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling safe firmware updates during runtime. Its clock system integrates factory-trimmed 16 MHz HSI RC (±1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC with calibration support.
Low-power operation is enforced via five distinct modes: Run (93 µA/MHz), Sleep, Low-power Run/Sleep, Stop (0.43 µA), and Standby (0.29 µA). Wake-up from Stop mode occurs in 5 µs from Flash, and the device supports 78 5V-tolerant GPIOs with configurable pull-ups/pull-downs and interrupt capability on 16 lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz - enables deterministic real-time control with minimal power overhead. |
| Memory | 192 KB Flash (ECC, dual-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC) - supports robust firmware storage, data logging, and field-upgradable configuration. |
| Power Modes | Stop mode: 0.43 µA; Standby: 0.29 µA; Run: 93 µA/MHz - optimized for multi-year battery life in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs (buffered, down to 1.8 V), 2×ultra-low-power comparators - enables precision sensor signal chain without external components. |
| 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) - supports direct USB-C connectivity and multi-protocol sensor hub integration. |
| Package & I/O | UFBGA48 (7 × 7 mm), 42 GPIOs (37 5V-tolerant), LCD driver (4×52/8×48 segments) - compact footprint with high peripheral density and on-chip display support. |
Pinout & Package
STM32L073CZT3 uses a 48-pin Ultra-Fine Pitch Ball Grid Array (UFBGA48) package with 0.5 mm pitch and 7 × 7 mm body size, designed for space-constrained PCB layouts and automated assembly. Pin functions are validated per STMicroelectronics DS10685 Rev 7, Section 4 (Pin descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground rails | Separate analog/digital domains ensure clean ADC/DAC operation; VDDA must be ≥ VDD for full analog performance. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1 | General-purpose I/Os | 42 usable GPIOs; 37 support 5V tolerance - simplifies level-shifting in mixed-voltage systems. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PD2, PH0, PH1 | Alternate function mapping | Supports USB D+/D−, USART TX/RX, SPI SCK/MOSI/MISO, I2C SCL/SDA, ADC IN0–IN15, DAC OUT1/OUT2 - enables full peripheral concurrency. |
| NRST | Active-low reset input | Internal pull-up; accepts external push-button or supervisor IC assertion - ensures reliable cold-start and brownout recovery. |
| BOOT0 | Boot mode selection | High at reset enters system memory bootloader (USB/USART); low boots from Flash - enables field firmware recovery without debugger. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode + RTC + RAM retention | 0.86 µA with 20 KB SRAM retained and RTC running - preserves state and timekeeping across multi-week sleep intervals. |
| Crystal-less USB 2.0 interface | HSI48 self-calibration against USB SOF packets eliminates external crystal - reduces BOM cost and board area by ~2 mm². |
| Integrated LCD controller | Drives up to 4×52 or 8×48 segments with on-chip step-up converter and contrast adjustment - enables monochrome display without external bias generator. |
| Dual buffered 12-bit DACs | Independent output buffers drive ≥5 kΩ loads at 1.8–3.6 V - supports simultaneous analog waveform generation or sensor calibration voltage sourcing. |
| Capacitive touch sensing (TSC) | 24-channel controller with built-in charge transfer and noise filtering - enables robust touchkey, slider, and rotary implementations without external ICs. |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter with hourly pressure/flow sampling, local LCD display, and periodic NB-IoT transmission. IC Role / Device Role / Timing Role: Main MCU managing sensor acquisition, LCD refresh, RTC-based wake-up scheduling, and USB/USART firmware updates. Use Value: 0.29 µA Standby current extends 10-year battery life; integrated LCD driver eliminates external display controller; USB crystal-less enables field reprogramming via standard cable. | Use Scenario: ECG patch with continuous analog front-end sampling, real-time QRS detection, Bluetooth LE telemetry, and OLED status display. IC Role / Device Role / Timing Role: Signal processing core executing FIR filters, ADC/DAC interfacing, capacitive touch UI, and low-power BLE coexistence management. Use Value: Dual 12-bit DACs generate precise reference voltages for analog front-end calibration; 12-bit ADC achieves 70 dB SNR at 10 ksps; TSC supports touch-based power-on/off control. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: LoRaWAN node monitoring temperature, humidity, and vibration in HVAC ducts with 15-minute reporting intervals. IC Role / Device Role / Timing Role: Data concentrator aggregating I2C sensor data, performing CRC integrity checks, and managing LoRa transceiver power sequencing. Use Value: 6 KB EEPROM stores calibrated sensor offsets and network keys with ECC protection; 7-channel DMA offloads SPI/I2C transfers from CPU; Stop mode current <0.5 µA ensures >5-year operation on CR2032. | Use Scenario: Handheld blood glucose meter with electrochemical strip interface, LCD readout, USB charging, and firmware update capability. IC Role / Device Role / Timing Role: Precision analog controller handling strip biasing (DAC), current measurement (ADC), USB battery charging detection, and LCD segment driving. Use Value: USB crystal-less interface enables direct connection to PC for calibration data upload and firmware upgrade; 2× ultra-low-power comparators detect strip insertion and end-of-test conditions. |
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 pinout; lacks USB PHY and LCD controller; 128 KB Flash, no DACs | Suitable for non-USB, non-display sensor nodes where cost reduction outweighs peripheral loss | Select when USB/LCD/DAC are unused - saves $0.35/unit at 10k volume. |
| STM32L433CCU6 | Cortex-M4F core; 256 KB Flash, 64 KB SRAM; higher active power (110 µA/MHz); includes FPU and AES | Better for floating-point math (e.g., FFT-based vibration analysis) but requires thermal derating above 85°C | Choose only if algorithmic complexity demands M4F; verify Stop mode current (1.2 µA) meets battery life targets. |
Compared with STM32L072CZT6, the STM32L073CZT3 adds USB crystal-less and LCD/DAC peripherals at modest cost premium; versus STM32L433CCU6, it delivers superior sub-1 µA low-power operation but lacks floating-point acceleration - making it optimal for long-life, mixed-signal edge nodes.
Availability
STM32L073CZT3 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 multi-year production cycles.
Supply support for STM32L073CZT3 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong focus on energy efficiency and industrial reliability.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, secure firmware execution, and rich analog integration - particularly in metering, wearables, and IoT edge nodes.
FAQ
What is the maximum operating temperature range for STM32L073CZT3?
The STM32L073CZT3 is rated for operation from –40 °C to +125 °C ambient temperature, validated per DS10685 Rev 7 Section 6.3.1. This extended range supports deployment in automotive under-hood modules, industrial motor drives, and outdoor utility infrastructure without external thermal management.
Does STM32L073CZT3 support hardware encryption or secure boot?
It includes a true random number generator (TRNG) and firewall protection for memory isolation, but lacks dedicated AES or SHA accelerators. Secure boot is implemented via option byte configuration and read-out protection (RDP Level 1/2), not hardware cryptographic engines - suitable for basic IP protection but not certified secure element use cases.
Can the internal 48 MHz RC oscillator meet USB full-speed timing requirements without external crystal?
Yes - the HSI48 oscillator features automatic self-calibration against USB Start-of-Frame (SOF) tokens, achieving ±0.25% accuracy over voltage and temperature. This satisfies USB 2.0 full-speed (12 Mbps) timing compliance per ST's AN4879 application note and eliminates need for external 48 MHz crystal.
How many I/O pins on STM32L073CZT3 are 5V tolerant, and which ones?
37 of the 42 GPIOs are 5V tolerant, specifically: PA0–PA15, PB0–PB15, PC0–PC7, PD2, PH0, and PH1. Tolerance applies only when VDD is powered (≥1.65 V); pins marked "FT" in the pin definition table (DS10685 Rev 7, Table 16) retain logic levels up to 5.5 V, enabling direct interfacing with legacy 5V peripherals.
STM32L073CZT3 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073CZT3 FAQ
1.How can I place an order for STM32L073CZT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073CZT3 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 STM32L073CZT3 reliable?
The price and inventory of STM32L073CZT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073CZT3 is usually 5 days.
3.What payment methods are accepted for STM32L073CZT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073CZT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073CZT3?
STM32L073CZT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073CZT3 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 STM32L073CZT3?
For technical support, including STM32L073CZT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073CZT3 requirements.
6.How does Aetrix verify that STM32L073CZT3 is sourced from the original manufacturer or authorized distributors?
All STM32L073CZT3 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 STM32L073CZT3 meets industry standards.
7.What is the process for return or replacement of STM32L073CZT3?
All STM32L073CZT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073CZT3, 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 STM32L073CZT3 part is unused and in its original packaging.
Return procedure for STM32L073CZT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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