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

STMicroelectronics STM32L072CZY3TR

Name: STM32L072CZY3TR
Brand: STMicroelectronics
SKU: STM32L072CZY3TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L072CZY3TR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 49-UFBGA, WLCSP

Datasheet:: STM32L072CZY3TR.pdf

Description:: IC MCU 32BIT 192KB FLASH 49WLCSP

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Product details

Overview

STM32L072CZY3TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in WLCSP49 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, USB 2.0 (crystal-less), dual 12-bit DACs, and 12-bit ADC (1.14 Msps, 16 channels). It operates from 1.65–3.6 V across –40 to +125 °C and targets battery-powered IoT sensor nodes requiring long runtime and analog signal conditioning.

For engineers reviewing the STM32L072CZY3TR datasheet, STM32L072CZY3TR pinout, STM32L072CZY3TR application, or STM32L072CZY3TR equivalent, key selection criteria include ultra-low standby current (0.29 µA), 5 µs Flash wakeup time, USB crystal-less operation, dual DAC output buffering down to 1.8 V, and capacitive touch support for up to 24 channels.

Technical Context

The STM32L072CZY3TR integrates a Cortex-M0+ core with MPU, running at up to 32 MHz using multiple clock sources: HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and MSI (65 kHz–4.2 MHz). Its low-power architecture supports six power modes - Run, Sleep, Low-power Run/Sleep, Stop, and Standby - with configurable voltage scaling and dynamic power gating per peripheral.

Analog subsystem includes two independent 12-bit DACs with output buffers (1.8–3.6 V operation), a 12-bit ADC with hardware oversampling and up to 16 external channels, two ultra-low-power comparators (1.65 V min supply), and a dedicated Touch Sensing Controller (TSC) supporting linear/rotary sensors and touchkeys without external components.

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 minimal code footprint and energy per instruction.
Memory	192 KB Flash (dual-bank, RWW, ECC), 20 KB SRAM, 6 KB EEPROM (ECC) - enables firmware updates without interruption and robust data logging in harsh environments.
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 periodic-sensing applications.
ADC	12-bit, 1.14 Msps, 16-channel, 1.65 V min supply - supports high-resolution sensor acquisition (e.g., thermistors, strain gauges) without external LDO.
DAC	2 × 12-bit, buffered outputs, 1.8–3.6 V operation - provides precision analog actuation (e.g., bias voltage control, sensor calibration trim) with rail-to-rail linearity.
USB Interface	USB 2.0 full-speed, crystal-less, battery charging detection - eliminates external crystal and reduces BOM cost while enabling direct connection to host PCs or chargers.
Capacitive Sensing	24-channel TSC with built-in charge transfer and noise immunity - implements touch interfaces on metal or glass overlays without shield layers or external ICs.

Pinout & Package

STM32L072CZY3TR uses a 49-ball WLCSP (3.294 × 3.258 mm, 0.4 mm pitch) package optimized for space-constrained wearables and medical patches. Ball pitch and layout comply with JEDEC MO-220, supporting automated reflow assembly and high-density PCB routing.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply and ground	Core and I/O domain supply; supports single 1.65–3.6 V rail with internal regulator - simplifies power design for compact battery systems.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PH0–PH1	General-purpose I/Os	Up to 78 5V-tolerant GPIOs; most support wake-up, EXTI, and multiple alternate functions - enables flexible peripheral mapping and legacy interface compatibility.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PA8, PA15, PB0, PB1, PB2, PB10, PB11, PC0–PC7, PC13, PC14, PC15, PD0, PD1	Capacitive sensing inputs	Direct connection to TSC channels - allows self-capacitance or mutual-capacitance touch sensing with <1 pF resolution and adaptive noise filtering.
PA11, PA12	USB D+/D−	Dedicated crystal-less USB transceiver pins - integrate internal trimming oscillator and battery detection circuitry; no external components required.
PA0, PA1, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC5, PC7, PC13, PC14, PC15, PD0, PD1, PH0, PH1	Analog inputs (ADC/DAC/comparator)	Shared with GPIO; support simultaneous analog acquisition and digital control - enables mixed-signal closed-loop systems (e.g., sensor + actuator + feedback).

Key Features

Feature	Design Value
Ultra-low-power BOR	5 selectable brownout thresholds (1.62–2.5 V) - ensures reliable reset during battery voltage sag without external supervisor IC.
Self-calibrating 48 MHz RC (HSI48)	±0.25% accuracy over temperature/voltage - enables crystal-less USB full-speed communication with guaranteed timing compliance.
Read-while-write Flash	Dual-bank architecture allows background firmware update while executing from active bank - eliminates system downtime during OTA upgrades.
True RNG + Firewall	Digital true random number generator and memory protection unit (MPU) - meets IEC 62443-3-3 SL2 requirements for secure boot and cryptographic key generation.
7-channel DMA	Hardware-accelerated data movement between peripherals (ADC→RAM, DAC→buffer, SPI→Flash) - offloads CPU and reduces active time by >40% in sensor streaming.

Applications

Wireless Sensor Node

Portable Medical Device

Use Scenario: Battery-powered environmental monitor transmitting temperature/humidity via BLE or LoRaWAN every 5 minutes.

IC Role / Device Role / Timing Role: Main controller managing sensor readout (ADC), local data processing, sleep/wakeup scheduling, and radio interface timing via LPTIM and RTC.

Use Value: 0.29 µA Standby current and 5 µs wakeup enable >5-year CR2032 lifetime; integrated DAC calibrates sensor offset without external DAC IC.

Use Scenario: Disposable glucose meter with touch interface, analog front-end, and USB mass storage for log export.

IC Role / Device Role / Timing Role: System-on-chip handling electrochemical sensor signal conditioning (ADC + DAC trim), capacitive touch UI, and crystal-less USB enumeration.

Use Value: 24-channel TSC enables intuitive button-free navigation; USB crystal-less reduces BOM count and PCB area by eliminating 12 MHz crystal and load caps.

Smart Utility Meter

Industrial Predictive Maintenance Node

Use Scenario: Battery-operated water/gas meter reading pulse outputs and pressure sensors, reporting daily via NB-IoT.

IC Role / Device Role / Timing Role: Primary MCU performing pulse counting (input capture), pressure ADC sampling, RTC-based reporting schedule, and secure firmware update via UART/USB.

Use Value: 6 KB EEPROM with ECC stores calibration coefficients and metering history with 20-year data retention; tamper detection via comparator window mode.

Use Scenario: Vibration sensor node mounted on motor housing, acquiring accelerometer data and triggering alerts on spectral anomalies.

IC Role / Device Role / Timing Role: Real-time signal processor running FFT-based feature extraction on ADC samples, with LPTIM-triggered burst acquisition synchronized to motor RPM.

Use Value: Dual DACs generate reference waveforms for self-test; 12-bit ADC oversampling achieves >14 ENOB for accurate spectral analysis without external amplifier.

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
STM32L073RZT6	LQFP64 package (10×10 mm), 192 KB Flash, same peripherals but adds CAN 2.0B controller and higher I/O count (51 vs 41 usable in WLCSP)	Preferred where CAN bus integration is required (e.g., industrial fieldbus nodes) and board space permits larger package	Select when CAN interface is mandatory and thermal/power constraints allow larger footprint; not drop-in due to pinout and package mismatch.
STM32L432KCU6	Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM, higher active power (81 µA/MHz), adds FPU and AES engine	Better suited for edge AI inference (e.g., anomaly detection ML models) or cryptographic-heavy use cases where compute density outweighs battery life priority	Choose when floating-point math or secure boot acceleration is critical; trade-off is ~2.8× higher Run-mode current versus STM32L072CZY3TR.

Compared with STM32L072CZY3TR, STM32L073RZT6 adds CAN but requires PCB redesign, while STM32L432KCU6 trades ultra-low-power efficiency for computational capability - making the CZY3TR optimal for size- and battery-limited applications where analog integration and sub-µA sleep dominate selection.

Availability

STM32L072CZY3TR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, smart utility meters, and industrial predictive maintenance nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L072CZY3TR 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 since 1987.

The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and secure firmware execution - specifically engineered for IoT endpoints, wearables, and energy-harvesting systems.

FAQ

What is the maximum operating temperature for STM32L072CZY3TR?

The STM32L072CZY3TR is qualified for operation from –40 °C to +125 °C ambient temperature. This extended range is validated per AEC-Q100 stress tests and supports deployment in under-hood automotive modules, industrial enclosures, and outdoor metering equipment without derating.

Does STM32L072CZY3TR support USB device mode without an external crystal?

Yes - it integrates a self-calibrating 48 MHz RC oscillator (HSI48) trimmed against the USB SOF packet, enabling full-speed (12 Mbps) USB device operation without any external crystal or clock source. The PA11/PA12 pins are dedicated USB D+/D− with built-in transceivers and battery charging detection logic.

How many capacitive sensing channels are supported, and what is the minimum detectable capacitance change?

The device supports up to 24 capacitive sensing channels via its integrated Touch Sensing Controller (TSC). With programmable charge current and sampling time, it achieves <1 pF resolution in optimized configurations - sufficient for detecting finger touch through 3 mm glass or thin plastic overlays without shielding layers.

Is the 6 KB EEPROM truly persistent, and how is endurance specified?

Yes - the 6 KB data EEPROM is implemented in dedicated Flash memory with hardware ECC and wear-leveling. ST specifies 100,000 write/erase cycles and 20-year data retention at 85 °C, verified per JESD22-A117. Each byte can be rewritten independently, and erase granularity is 32 bytes per sector.

STM32L072CZY3TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 49-UFBGA, WLCSP

Series:: STM32L0

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M0+

Core Size:: 32-Bit Single-Core

Speed:: 32MHz

Connectivity:: I2C, IrDA, SPI, UART/USART, USB

Peripherals:: Brown-out Detect/Reset, DMA, POR, PWM, WDT

Number of I/O:: 40

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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32L072CZY3TR FAQ

1.How can I place an order for STM32L072CZY3TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L072CZY3TR 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 STM32L072CZY3TR reliable?

The price and inventory of STM32L072CZY3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072CZY3TR is usually 5 days.

3.What payment methods are accepted for STM32L072CZY3TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072CZY3TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L072CZY3TR?

STM32L072CZY3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L072CZY3TR 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 STM32L072CZY3TR?

For technical support, including STM32L072CZY3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072CZY3TR requirements.

6.How does Aetrix verify that STM32L072CZY3TR is sourced from the original manufacturer or authorized distributors?

All STM32L072CZY3TR 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 STM32L072CZY3TR meets industry standards.

7.What is the process for return or replacement of STM32L072CZY3TR?

All STM32L072CZY3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072CZY3TR, 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 STM32L072CZY3TR part is unused and in its original packaging.

Return procedure for STM32L072CZY3TR:

1.Submit a request within 90 days.

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

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