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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32L073CZU6D

Name: STM32L073CZU6D
Brand: STMicroelectronics
SKU: STM32L073CZU6D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L073CZU6D

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32L073CZU6D.pdf

Description:: IC MCU 32BIT 192KB FLSH 48UFQFPN

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Product details

Overview

STM32L073CZU6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFBGA100 (7×7 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, 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 monitors.

For engineers reviewing the STM32L073CZU6D datasheet, STM32L073CZU6D pinout, STM32L073CZU6D application, or STM32L073CZU6D equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC performance (1.14 Msps, 16-channel), RTC + RAM retention in Stop mode (0.86 µA), USB crystal-less operation, and 78 I/Os with 5V tolerance.

Technical Context

The STM32L073CZU6D 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 (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting dynamic voltage scaling across Run, Sleep, Stop, and Standby modes.

Low-power operation is enforced via dedicated peripherals: ultra-low-power comparators (wakeup capable down to 1.65 V), 16-channel capacitive sensing controller, and an independent low-power timer (LPTIM) with sub-microsecond resolution - all coordinated through a centralized interconnect matrix and programmable voltage detector (PVD).

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - delivers deterministic real-time control with MPU for memory protection.
Flash / EEPROM	192 KB Flash with ECC & 6 KB EEPROM with ECC - enables robust firmware updates and nonvolatile parameter storage without external components.
Power Consumption	0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - extends coin-cell battery life to >10 years in metering applications.
Analog Peripherals	12-bit ADC (1.14 Msps, 16 channels, down to 1.65 V), 2×12-bit DACs with buffers (down to 1.8 V) - supports precision sensor signal chain and analog output generation.
USB Interface	Crystal-less USB 2.0 full-speed with battery charging detection - eliminates external crystal and reduces BOM cost in portable devices.
I/O Capability	78 I/Os (5V tolerant), up to 24 capacitive sensing channels - enables direct touch interface and mixed-voltage system integration.
Temperature Range	-40 °C to +125 °C - qualified for industrial automation and automotive under-hood sensor nodes.

Pinout & Package

STM32L073CZU6D is housed in a 100-pin UFBGA package (7×7 mm, 0.5 mm pitch), optimized for space-constrained portable electronics. Pin assignments follow ST's standardized STM32L073xx pin definition (DS10685 Rev 7, Table 16), with dedicated V_DD/V_SS pairs, multiple V_REF+/V_REF- inputs for ADC/DAC reference stability, and dedicated LCD segment/common drivers (SEG0–SEG47, COM0–COM3).

Pin/Terminal	Circuit Role	Design Meaning
V_DD, V_SS (x12)	Power supply and ground	Dedicated power/ground pairs per quadrant minimize noise coupling and ensure stable core/peripheral operation at ultra-low currents.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7, PH0–PH1	General-purpose I/Os	78 GPIOs support 5V tolerance, multiple alternate functions (USART, SPI, I2C, USB, LCD), and capacitive sensing - enabling flexible peripheral routing.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PD0–PD7, PE0–PE7	ADC input channels	16-channel 12-bit ADC accepts inputs down to 1.65 V supply - supports direct connection to low-voltage sensors without level-shifting.
PA4, PA5	DAC outputs	Two buffered 12-bit DAC outputs (DAC1, DAC2) operate down to 1.8 V - suitable for driving analog front-ends or calibration references.
PC13–PC15	RTC oscillator inputs	Support 32.768 kHz crystal for high-accuracy real-time clock with built-in calibration - critical for time-stamped data logging.
PA11, PA12	USB D+/D−	Crystal-less USB 2.0 full-speed interface with internal 48 MHz HSI48 calibration - eliminates external crystal and saves PCB area.

Key Features

Feature	Design Value
Ultra-low-power Stop mode + RTC + 20 KB RAM retention	0.86 µA - enables long-term data buffering and time-triggered wakeups without data loss in energy-harvesting systems.
Hardware ECC on Flash and EEPROM	Single-bit error correction and double-bit error detection - ensures firmware integrity and parameter reliability over 20+ year deployments.
Integrated LCD controller	Drives 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.
True random number generator (RNG)	FIPS-compliant entropy source - provides cryptographically secure keys for secure boot and device authentication in IoT edge nodes.
Pre-programmed USB/USART bootloader	Factory-loaded ROM bootloader enables field firmware updates without debug probe - reduces production test complexity and supports remote maintenance.

Applications

Smart Utility Meter

Portable ECG Monitor

Use Scenario: Battery-powered electricity/water/gas meter with hourly consumption logging, tamper detection, and RF communication.

IC Role / Device Role / Timing Role: Main system controller managing metrology ADC sampling, RTC-timestamped data storage in EEPROM, LCD display, and low-power RF transceiver wakeups.

Use Value: 0.29 µA Standby current and 0.86 µA Stop+RTC mode enable >15-year battery life; integrated LCD driver reduces component count by 3+ ICs.

Use Scenario: Handheld electrocardiogram device with analog front-end, real-time waveform display, and Bluetooth LE data upload.

IC Role / Device Role / Timing Role: Signal acquisition controller synchronizing 12-bit ADC sampling (1.14 Msps), buffering waveform data in 20 KB SRAM, driving 4×32-segment LCD, and managing USB/Bluetooth LE interface timing.

Use Value: Dual 12-bit DACs generate precise calibration signals; crystal-less USB simplifies regulatory compliance and lowers BOM cost.

Industrial Wireless Sensor Node

Low-Power HVAC Controller

Use Scenario: DIN-rail mounted temperature/humidity/pressure sensor node transmitting data via LoRaWAN every 15 minutes.

IC Role / Device Role / Timing Role: Central MCU coordinating sensor reads via I2C/SPI, executing sensor fusion algorithms, managing LoRa transceiver sleep/wake cycles, and maintaining accurate timestamps.

Use Value: 78 5V-tolerant I/Os interface legacy analog sensors; ultra-low-power comparators detect threshold breaches and trigger immediate wakeups.

Use Scenario: Wall-mounted thermostat with capacitive touch buttons, ambient temperature sensing, relay control, and Zigbee connectivity.

IC Role / Device Role / Timing Role: Human-machine interface controller handling 24-channel capacitive touch sensing, driving segmented LCD, regulating fan speed via PWM timers, and managing Zigbee coexistence.

Use Value: Integrated TSC eliminates external touch controller; 11 timers (including LPTIM) provide precise HVAC actuation timing and low-jitter PWM generation.

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
STM32L072CZU6	Same UFBGA100 package, identical core/peripherals, but 128 KB Flash and no USB interface.	Lacks crystal-less USB and LCD controller - unsuitable for USB-connected or display-integrated designs.	Select when USB/LCD are unnecessary and cost reduction is prioritized over feature headroom.
STM32L433CCU6	Cortex-M4F core, 256 KB Flash, 64 KB SRAM, but higher active current (81 µA/MHz) and no EEPROM.	Higher compute throughput and FPU support, but lacks embedded EEPROM and ultra-low-power Stop+RTC capability (1.3 µA vs 0.86 µA).	Choose for math-intensive sensor fusion where USB/LCD are secondary and power budget allows ~50% higher active current.

Compared with STM32L072CZU6, the STM32L073CZU6D adds USB and LCD - critical for connected displays; versus STM32L433CCU6, it trades processing power for 45% lower Stop+RTC current and integrated EEPROM - essential for long-life, data-logging edge nodes.

Availability

STM32L073CZU6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and low-power HVAC controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32L073CZU6D 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 analog solutions for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications - engineered specifically for battery-operated devices demanding multi-year runtime, robust security (RNG, firewall), and integrated analog peripherals to minimize external components.

FAQ

What is the maximum operating frequency and core type of the STM32L073CZU6D?

The STM32L073CZU6D 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 -40 °C to +125 °C temperature range and supports dynamic voltage scaling to optimize power versus performance.

Does the STM32L073CZU6D support crystal-less USB operation?

Yes - the STM32L073CZU6D integrates a self-calibrating 48 MHz HSI48 RC oscillator dedicated to USB 2.0 full-speed operation. This eliminates the need for an external USB crystal, reducing BOM cost and PCB footprint while maintaining ±0.25% accuracy over temperature and voltage - validated per USB-IF compliance requirements.

How many I/O pins are 5V tolerant, and what is the total GPIO count?

The STM32L073CZU6D provides 78 I/O pins with full 5V tolerance, enabling direct interfacing with legacy 5V logic, sensors, and actuators without level shifters. All 78 pins support multiple alternate functions including USART, SPI, I2C, USB, LCD, and capacitive sensing - with configurable pull-up/pull-down and open-drain modes.

What is the endurance and retention specification for the embedded EEPROM?

The STM32L073CZU6D includes 6 KB of data EEPROM with hardware ECC, rated for 100,000 write/erase cycles and data retention of 20 years at 85 °C (or 40 years at 25 °C). Each byte can be erased and rewritten independently, and ECC ensures single-bit correction/double-bit detection - verified per ST's qualification standards (JESD22-A117).

STM32L073CZU6D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-UFQFN Exposed Pad

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):: 1.65V ~ 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:

STM32L073CZU6D FAQ

1.How can I place an order for STM32L073CZU6D through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L073CZU6D 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 STM32L073CZU6D reliable?

The price and inventory of STM32L073CZU6D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073CZU6D is usually 5 days.

3.What payment methods are accepted for STM32L073CZU6D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073CZU6D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L073CZU6D?

STM32L073CZU6D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L073CZU6D 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 STM32L073CZU6D?

For technical support, including STM32L073CZU6D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073CZU6D requirements.

6.How does Aetrix verify that STM32L073CZU6D is sourced from the original manufacturer or authorized distributors?

All STM32L073CZU6D 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 STM32L073CZU6D meets industry standards.

7.What is the process for return or replacement of STM32L073CZU6D?

All STM32L073CZU6D units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073CZU6D, 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 STM32L073CZU6D part is unused and in its original packaging.

Return procedure for STM32L073CZU6D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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