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

STMicroelectronics STM32L073CZU6

Name: STM32L073CZU6
Brand: STMicroelectronics
SKU: STM32L073CZU6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L073CZU6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32L073CZU6.pdf

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

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Product details

Overview

STM32L073CZU6 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, USB 2.0 crystal-less interface, and integrated LCD driver - deployed in battery-powered industrial sensors and portable medical monitors requiring sub-1 µA Stop mode operation.

For engineers reviewing the STM32L073CZU6 datasheet, STM32L073CZU6 pinout, STM32L073CZU6 application, or STM32L073CZU6 equivalent, key selection criteria include verified 0.86 µA Stop mode + RTC + RAM retention, dual 12-bit DACs with output buffers, 12-bit ADC at 1.14 Msps, USB crystal-less timing accuracy, and 78 I/Os with 5V tolerance - all validated across -40 to +125 °C.

Technical Context

The STM32L073CZU6 integrates a Cortex-M0+ core running up to 32 MHz with MPU, supported by multiple clock sources: factory-trimmed 16 MHz HSI (±1%), self-calibrating 48 MHz HSI48 for USB, 32 kHz LSE for RTC, and multispeed MSI (65 kHz–4.2 MHz). Its low-power architecture enables five operational modes - Run, Sleep, Low-power Run, Stop, and Standby - each with distinct peripheral availability and current profiles.

Analog subsystem includes two independent 12-bit DACs (down to 1.8 V), a 12-bit ADC with 16 channels and 1.14 Msps sampling, two ultra-low-power comparators (1.65 V min supply), and a 24-channel capacitive sensing controller. Digital peripherals comprise 4 USARTs (2 ISO 7816/IrDA-capable), 6 SPIs (16 Mbit/s), 3 I²Cs (2 SMBus/PMBus), USB 2.0, and 11 timers including LPTIM and RTC.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M0+, 32 MHz max - delivers 0.95 DMIPS/MHz for deterministic real-time control in constrained power budgets.
Flash / SRAM / EEPROM	192 KB Flash (ECC, read-while-write), 20 KB SRAM, 6 KB EEPROM (ECC) - enables firmware updates without data loss and robust parameter storage.
Low-power consumption	0.86 µA Stop mode + RTC + 20 KB RAM retention - sustains timekeeping and sensor state during multi-year battery operation.
ADC	12-bit, 1.14 Msps, 16 channels, 1.65 V min supply - supports high-resolution analog acquisition in wide-input-range sensor interfaces.
DACs	2 × 12-bit with output buffers, 1.8 V min supply - provides precision analog output for calibration signals or actuator control without external op-amps.
USB interface	Crystal-less USB 2.0 full-speed - eliminates external crystal and associated BOM cost while maintaining ±0.25% timing accuracy via HSI48 self-calibration.
I/O count & tolerance	78 of 84 I/Os 5V tolerant - simplifies level-shifting in mixed-voltage systems interfacing with legacy peripherals or industrial logic.

Pinout & Package

STM32L073CZU6 is housed in a 100-ball UFBGA package (7×7 mm, 0.5 mm pitch), optimized for space-constrained portable and wearable designs. Pin layout follows ST's standardized STM32L073xx pin mapping for UFBGA100, with dedicated V_BAT, V_REF+, and LCD segment/common pins supporting on-chip display driving.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Main power supply and ground	Supports 1.65–3.6 V operation; decoupling required per datasheet Section 6.1.6 for stable low-power mode transitions.
V_BAT	Backup power supply	Enables RTC and 20-byte backup registers during main power loss - critical for tamper-proof timestamping in security applications.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15, PH0–PH1	General-purpose I/Os	78 pins support 5V tolerance and multiple alternate functions (USART, SPI, I²C, ADC, DAC); configurable pull-up/down and slew rate.
PA1–PA4, PA6–PA15, PB0–PB1, PB10–PB15, PC0–PC15, PD0–PD15, PE0–PE15, PH0–PH1	LCD segment/common drivers	Drives up to 4×52 or 8×48 segments with on-board step-up converter - eliminates external LCD bias supply in portable displays.
PA11/PA12	USB D+/D−	Crysal-less USB 2.0 full-speed interface; internal termination and transceiver enable direct connection to USB connector without external components.
PA0, PC13, PC14, PC15	Standby wakeup pins	3 dedicated wakeup inputs in Standby mode - allows immediate system resume from deep sleep on external event (e.g., button press or sensor alert).

Key Features

Feature	Design Value
Ultra-low-power Stop mode	0.86 µA with RTC active and 20 KB RAM retained - extends battery life in always-on monitoring devices beyond 5 years on coin cell.
Crystal-less USB	HSI48 self-calibration against USB SOF packets achieves ±0.25% accuracy - removes crystal, load capacitors, and layout sensitivity in compact USB peripherals.
Integrated LCD controller	Supports 4×52/8×48 segments with contrast adjustment and blinking; on-chip step-up converter powers LCD from single 3 V rail - reduces BOM by 3–5 passive components.
Dual buffered 12-bit DACs	Independent outputs with rail-to-rail swing down to 1.8 V - enables simultaneous analog stimulus generation (e.g., sensor excitation + reference voltage) without external DACs.
Capacitive touch sensing	24-channel TSC with built-in charge transfer and noise filtering - implements robust touchkey, slider, or rotary control using only GPIOs and no external ICs.

Applications

Smart Utility Meter

Portable ECG Monitor

Use Scenario: Battery-powered electricity/water meter with LCD display, real-time clock, and pulse counting over 10+ years.

IC Role / Device Role / Timing Role: Main system controller managing metrology ADC, LCD refresh, secure EEPROM logging, and ultra-low-power RTC wakeups every 15 minutes.

Use Value: 0.86 µA Stop mode + RTC ensures accurate billing timestamps; 6 KB EEPROM with ECC prevents data corruption during power interruption.

Use Scenario: Handheld ECG device acquiring biopotential signals, displaying waveforms, and storing 30-second traces on internal flash.

IC Role / Device Role / Timing Role: Signal acquisition hub - synchronizing 12-bit ADC sampling, buffering data in SRAM, driving LCD via integrated controller, and transmitting via USB.

Use Value: Dual 12-bit DACs generate precise lead-off detection voltages; crystal-less USB enables fast firmware updates without external clock components.

Industrial Wireless Sensor Node

Low-Power HVAC Controller

Use Scenario: LoRaWAN node measuring temperature, humidity, and CO₂, transmitting hourly via sub-GHz radio, powered by primary lithium battery.

IC Role / Device Role / Timing Role: Sensor fusion processor - reading I²C sensors, conditioning analog inputs via ADC/DAC, managing radio sleep/wake cycles, and maintaining secure boot.

Use Value: 78 5V-tolerant I/Os interface directly with legacy industrial sensors; 0.43 µA Stop mode minimizes quiescent drain between transmissions.

Use Scenario: Wall-mounted thermostat controlling fan speed, valve position, and ambient display using battery backup during AC outage.

IC Role / Device Role / Timing Role: System manager handling temperature sensing (ADC), actuator PWM (timers), LCD UI, and nonvolatile settings storage (EEPROM).

Use Value: On-chip LCD driver supports segmented display without external bias IC; 20-byte backup registers retain setpoints during brownout events.

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 and core, but lacks USB and LCD controller; 128 KB Flash, 20 KB SRAM, 6 KB EEPROM.	No crystal-less USB or integrated LCD - unsuitable for USB-connected or display-integrated designs.	Select when USB/LCD are unnecessary and BOM cost reduction is prioritized over peripheral flexibility.
STM32L433CCU6	Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM; USB OTG FS, no LCD; higher active power (82 µA/MHz vs 93 µA/MHz).	Higher compute throughput and FPU for DSP tasks, but lacks EEPROM and LCD - better for algorithm-intensive edge nodes without display.	Choose when floating-point math or larger code footprint is required, and EEPROM persistence is handled externally.

Compared with STM32L072CZU6, the STM32L073CZU6 adds essential USB and LCD functionality at identical package size and power envelope; versus STM32L433CCU6, it trades FPU capability for EEPROM reliability and ultra-low-power LCD integration - making it optimal for long-life, display-equipped, battery-operated endpoints.

Availability

STM32L073CZU6 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 extended product lifecycles.

Supply support for STM32L073CZU6 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 analog products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust memory integrity, and rich analog integration - with the STM32L073CZU6 representing its highest-peripheral-count variant in UFBGA100.

FAQ

What is the minimum operating voltage for the STM32L073CZU6's ADC and DAC peripherals?

The ADC operates down to 1.65 V supply, enabling accurate measurements even as battery voltage declines in primary-cell applications. Both 12-bit DACs function down to 1.8 V, supporting analog output generation across the full 1.65–3.6 V operating range - verified in datasheet Sections 6.3.15 and 6.3.16.

Does the STM32L073CZU6 support hardware encryption or secure boot features?

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 read-out protection (RDP) levels and option byte configuration - not cryptographic acceleration. For certified secure boot, external secure elements or higher-series STM32s (e.g., L5 or WB) are recommended.

Can the STM32L073CZU6 drive a graphic LCD or only segment-based displays?

The integrated LCD controller supports only static or multiplexed segment-based displays (up to 8×48 segments), not pixel-addressable graphic LCDs. It lacks frame buffer RAM and parallel/serial RGB interface logic. Graphic LCDs require external controllers or higher-end MCUs like STM32F7 or L4+ series with LTDC peripherals.

How many I/O pins support capacitive touch sensing on the STM32L073CZU6?

It supports up to 24 capacitive sensing channels using dedicated TSC peripheral pins - mapped across GPIO ports A, B, C, D, E, and H per Table 9 and Section 3.16 of DS10685 Rev 7. All 24 channels are simultaneously usable for touchkey, linear slider, or rotary encoder implementations without CPU overhead.

STM32L073CZU6 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:

STM32L073CZU6 FAQ

1.How can I place an order for STM32L073CZU6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L073CZU6 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 STM32L073CZU6 reliable?

The price and inventory of STM32L073CZU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073CZU6 is usually 5 days.

3.What payment methods are accepted for STM32L073CZU6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073CZU6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L073CZU6?

STM32L073CZU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L073CZU6 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 STM32L073CZU6?

For technical support, including STM32L073CZU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073CZU6 requirements.

6.How does Aetrix verify that STM32L073CZU6 is sourced from the original manufacturer or authorized distributors?

All STM32L073CZU6 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 STM32L073CZU6 meets industry standards.

7.What is the process for return or replacement of STM32L073CZU6?

All STM32L073CZU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073CZU6, 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 STM32L073CZU6 part is unused and in its original packaging.

Return procedure for STM32L073CZU6:

1.Submit a request within 90 days.

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

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