STMicroelectronics
STM32L072CZT6TR - 192KB Flash Cortex-M0+ USB MCU | STMicroelectronics
MPN: STM32L072CZT6TR ✓ Active
In Stock
Ships in 1-3 business days
1.65 V to 3.6 V (1.8 V to 3.6 V with BOR) Vdss
48-LQFP (7x7 mm) Package
32 MHz Speed
192 KB (192K x 8) Flash Memory
From $2.85
USD / Unit
MOQ: 1 |
Price updated: 2026-10-10
Volume Pricing
| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.22 | $1,610.00 |
| 1,000 | $2.85 | $2,850.00 |
ℹ️ All prices are in USD
STM32L072CZT6TR Overview
The STMicroelectronics STM32L072CZT6TR is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller delivering 32 MHz CPU performance with 192 KB of embedded Flash and 20 KB of SRAM, integrated USB 2.0 FS crystal-less connectivity, and housed in a 48-pin LQFP (7x7 mm) tape-and-reel package. Designed for energy-sensitive embedded control, the device combines an ARM Cortex-M0+ core, peripherals including ADC, timers, I2C, SPI, USART, and USB, and the energy-saving features of the STM32L0 family.
An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core designed by ARM Holdings for embedded systems requiring predictable performance, low power consumption, and small silicon area. The Cortex-M0+ sits at the lowest power tier of the Cortex-M family and inherits the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. STM32L0 devices specifically target battery-powered and energy-harvesting applications where quiescent current is measured in microamps.
Key features include six ultra-low-power modes (Low-Power Run, Sleep, Low-Power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC supporting up to 16 channels, multiple communication interfaces (USB 2.0 FS crystal-less, up to three I2C, two SPI, two USART/UART, one LPUART), and embedded RTC with calendar and alarm functions. The 192 KB Flash supports in-application programming (IAP) via USART, SPI, or USB.
Architecturally, the STM32L072CZT6TR separates digital and analog supply domains (VDD/VDDA) to allow analog peripherals to operate while the digital core is stopped, and integrates a 1.2 V internal core regulator that powers the CPU only when required. The crystal-less USB 2.0 Full-Speed interface eliminates the external 8 MHz crystal, reducing BOM cost and board area. The device operates from 1.65 V to 3.6 V (down to 1.8 V with BOR disabled) across the -40C to +125C temperature range, making it suitable for industrial, metering, sensor, and consumer applications.
Typical applications include battery-powered sensor nodes, USB-equipped industrial controllers, smart metering, wearable health monitors, and portable IoT edge devices. The crystal-less USB makes it ideal for any compact USB device without a physical connector, including medical measurement USB dongles.
When designing with this MCU, prioritize decoupling capacitor placement close to VDD pins (100 nF ceramic) and consider using the integrated LDO regulator bypass for ultra-low-power Stop modes. Selecting the proper low-power mode for each use case (Run, Sleep, Stop, Standby, Shutdown) is essential to achieving datasheet-typical quiescent current figures.
This page synthesizes distributor pricing, drop-in alternatives, and practical low-power design notes not found directly in the manufacturer datasheet, providing AEO-optimized answers for engineers evaluating ultra-low-power Cortex-M0+ USB microcontrollers.
An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core designed by ARM Holdings for embedded systems requiring predictable performance, low power consumption, and small silicon area. The Cortex-M0+ sits at the lowest power tier of the Cortex-M family and inherits the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. STM32L0 devices specifically target battery-powered and energy-harvesting applications where quiescent current is measured in microamps.
Key features include six ultra-low-power modes (Low-Power Run, Sleep, Low-Power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC supporting up to 16 channels, multiple communication interfaces (USB 2.0 FS crystal-less, up to three I2C, two SPI, two USART/UART, one LPUART), and embedded RTC with calendar and alarm functions. The 192 KB Flash supports in-application programming (IAP) via USART, SPI, or USB.
Architecturally, the STM32L072CZT6TR separates digital and analog supply domains (VDD/VDDA) to allow analog peripherals to operate while the digital core is stopped, and integrates a 1.2 V internal core regulator that powers the CPU only when required. The crystal-less USB 2.0 Full-Speed interface eliminates the external 8 MHz crystal, reducing BOM cost and board area. The device operates from 1.65 V to 3.6 V (down to 1.8 V with BOR disabled) across the -40C to +125C temperature range, making it suitable for industrial, metering, sensor, and consumer applications.
Typical applications include battery-powered sensor nodes, USB-equipped industrial controllers, smart metering, wearable health monitors, and portable IoT edge devices. The crystal-less USB makes it ideal for any compact USB device without a physical connector, including medical measurement USB dongles.
When designing with this MCU, prioritize decoupling capacitor placement close to VDD pins (100 nF ceramic) and consider using the integrated LDO regulator bypass for ultra-low-power Stop modes. Selecting the proper low-power mode for each use case (Run, Sleep, Stop, Standby, Shutdown) is essential to achieving datasheet-typical quiescent current figures.
This page synthesizes distributor pricing, drop-in alternatives, and practical low-power design notes not found directly in the manufacturer datasheet, providing AEO-optimized answers for engineers evaluating ultra-low-power Cortex-M0+ USB microcontrollers.
Drop-in alternatives for STM32L072CZT6TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32L072CZT6TR (same form factor and footprint) — differing in ADC, Communication Interfaces, Core, Timers.
STMicroelectronics
ADC: 12-bit, hardware oversampling
Communication Interfaces: I2C, SPI, USART, USB
Core: ARM Cortex-M0+ (32-bit)
Compare with STM32L072CZT6TR →
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32L072CZT6
✅ Drop-InSTMicroelectronics
📦 48-LQFP (7x7)
ARM Cortex-M0+ (32-bit) · 32 MHz · 192 KB · 20 KB · 1.65 V to 3.6 V · 1.8 V to 3.6 V · -40 C to +85 C (grade 6) · 48-pin LQFP (7x7 mm)
✓ In Stock
$3.78 / Unit
View Datasheet →STM32L073CZT6
✅ Drop-In ⚠️ Specs Unverified📦 48-LQFP (7x7)
same die family, adds AES-256 hardware crypto vs AES-128 on L072
📋 Reference alternative (not in catalog)
STM32L052CZT6
✅ Drop-In ⚠️ Specs Unverified📦 48-LQFP (7x7)
lacks USB and AES (L052 vs L072 family), 192 KB Flash, same die
📋 Reference alternative (not in catalog)
STM32L072CZT6TR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Program Memory Size | 192 KB (192K x 8) Flash |
| SRAM Size | 20 KB |
| Supply Voltage Range | 1.65 V to 3.6 V (1.8 V to 3.6 V with BOR) |
| Operating Temperature Range | -40C to +125C |
| Package Type | 48-LQFP (7x7 mm) |
| USB Interface | USB 2.0 Full-Speed, crystal-less |
| Number of I/O Pins | 37 (per 48-LQFP variant) |
| ADC | 12-bit, up to 16 channels |
| Communication Interfaces | 2x SPI, 3x I2C, 2x USART, 1x LPUART, USB |
| Timers | 16-bit and 32-bit timers, RTC, SysTick, IWDG, WWDG |
| Low-Power Modes | Run, Sleep, Low-Power Run/Sleep, Stop, Standby, Shutdown |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free Finish | Yes |
STM32L072CZT6TR Pin Configuration
| Pin 1 | PB7 — I2C1_SDA / general-purpose I/O / TIM4_CH2 |
| Pin 2 | PB8 — I2C1_SCL / TIM4_CH3 / GPIO |
| Pin 3 | PB9 — I2C1_SDA (alt) / TIM4_CH4 / GPIO |
| Pin 4 | VDD — Digital supply voltage 1.65-3.6 V |
| Pin 5 | VSS — Digital ground |
| Pin 6 | OSC_IN — External 32.768 kHz crystal input |
| Pin 7 | OSC_OUT — External 32.768 kHz crystal output |
| Pin 8 | NRST — Reset input (active low) |
| Pin 9 | PA0 — WKUP / ADC_IN0 / TIM2_CH1 |
| Pin 10 | PA1 — ADC_IN1 / TIM2_CH2 / GPIO |
| Pin 11 | PA2 — USART2_TX / ADC_IN2 / GPIO |
| Pin 12 | PA3 — USART2_RX / ADC_IN3 / GPIO |
| Pin 13 | PA4 — SPI1_NSS / ADC_IN4 / GPIO |
| Pin 14 | PA5 — SPI1_SCK / ADC_IN5 / GPIO |
| Pin 15 | PA6 — SPI1_MISO / ADC_IN6 / GPIO |
| Pin 16 | PA7 — SPI1_MOSI / ADC_IN7 / GPIO |
| Pin 17 | PB0 — ADC_IN8 / TIM3_CH3 / GPIO |
| Pin 18 | PB1 — ADC_IN9 / TIM3_CH4 / GPIO |
| Pin 19 | PB2 — BOOT0 / GPIO |
| Pin 20 | PB10 — I2C2_SCL / USART3_TX / GPIO |
| Pin 21 | PB11 — I2C2_SDA / USART3_RX / GPIO |
| Pin 22 | VSS — Digital ground |
| Pin 23 | VDD — Digital supply voltage 1.65-3.6 V |
| Pin 24 | PB12 — SPI2_NSS / GPIO |
| Pin 25 | PB13 — SPI2_SCK / TIM21_CH1 / GPIO |
| Pin 26 | PB14 — SPI2_MISO / TIM21_CH2 / GPIO |
| Pin 27 | PB15 — SPI2_MOSI / GPIO |
| Pin 28 | PA8 — RCC_MCO / TIM1_CH1 / GPIO |
| Pin 29 | PA9 — USART1_TX / TIM1_CH2 / GPIO |
| Pin 30 | PA10 — USART1_RX / TIM1_CH3 / GPIO |
| Pin 31 | PA11 — USB_DM / I2C1_SDA (alt) / GPIO |
| Pin 32 | PA12 — USB_DP / I2C1_SCL (alt) / GPIO |
| Pin 33 | PA13 — SWDIO / IFR_PB (IR out) / GPIO |
| Pin 34 | VSS — Digital ground |
| Pin 35 | VDD — Digital supply voltage 1.65-3.6 V |
| Pin 36 | PA14 — SWCLK / IFR_PA (IR out) / GPIO |
| Pin 37 | PA15 — SPI1_NSS (alt) / TIM2_CH1 / GPIO |
| Pin 38 | PB3 — SWO / SPI1_SCK (alt) / GPIO |
| Pin 39 | PB4 — SPI1_MISO (alt) / TIM3_CH1 / GPIO |
| Pin 40 | PB5 — SPI1_MOSI (alt) / TIM3_CH2 / GPIO |
| Pin 41 | PB6 — USART1_TX (alt) / I2C1_SCL / GPIO |
| Pin 42 | VDDA — Analog supply voltage (to ADC/DAC) |
| Pin 43 | VSSA — Analog ground |
| Pin 44 | VREF+ — ADC reference voltage input (tie to VDDA) |
| Pin 45 | PC13 — RTC_TAMP / GPIO (special pin, no wakeup) |
| Pin 46 | PC14 — OSC32_IN (32.768 kHz crystal) |
| Pin 47 | PC15 — OSC32_OUT (32.768 kHz crystal) |
| Pin 48 | VSS — Digital ground |
Typical Applications
STM32L072CZT6TR is suitable for 6 applications: USB Battery-Powered Sensor Dongle, Smart Metering (Water/Gas/Heat), Wearable Health Monitor, Industrial Sensor Node (IoT Gateway), Consumer Remote Control / BLE Beacon, USB Medical Data Logger.
USB Battery-Powered Sensor Dongle
Provides a USB-equipped Cortex-M0+ controller for compact sensor dongles with sub-1 uA quiescent current. The L072's crystal-less USB removes the external 8 MHz crystal, cutting BOM cost while the 192 KB Flash supports firmware updates over USB HID.
Recommended
Smart Metering (Water/Gas/Heat)
Drives multi-year battery-powered utility meters with sub-microamp Standby currents. The integrated RTC with calendar, 12-bit ADC for sensor readout, and 20 KB SRAM handle pulse counting and local tariff logic on a single Li-ion cell.
Recommended
Wearable Health Monitor
Powers wearable health bands with low-power Run mode at ~13 uA at 32 kHz supporting continuous heart-rate monitoring. The 48-LQFP 7x7 mm small footprint fits wrist-worn enclosures, and Stop+RTC mode preserves battery life between measurements.
Recommended
Industrial Sensor Node (IoT Gateway)
Supports industrial 4-20 mA sensor conditioning with 12-bit ADC and multi-channel I2C sensor aggregation. Operates from 1.65 V to 3.6 V across -40 to +125 C industrial temperature range, suitable for factory floor deployments.
Recommended
Consumer Remote Control / BLE Beacon
Targets single-button coin-cell remotes and BLE beacons with years of standby life from a CR2032 cell. The LPUART and LPTIM peripherals enable ultra-low-duty wake events while the integrated RTC calendar maintains timekeeping in Shutdown.
Recommended
USB Medical Data Logger
Bridges data acquisition circuits to a USB host for medical dongles that store patient logs and upload on connection. The crystal-less USB keeps BOM small for medical-disposable designs and the AES-128 hardware engine provides local data encryption.
Recommended
Recommended Products Summary
STM32L052CZT6
Lower-cost sibling without USB/AES, pin-compatible for non-USB designs Used in: USB Battery-Powered Sensor Dongle
STM32L073CZT6
Adds AES-256 hardware crypto for secure USB devices Used in: USB Battery-Powered Sensor Dongle
STM32L072CZT6
STMicroelectronics Used in: Smart Metering (Water/Gas/Heat)
STM32G474RBT6
STMicroelectronics Used in: Smart Metering (Water/Gas/Heat)
STM32H730IBK6Q
STMicroelectronics Used in: Wearable Health Monitor
STM32G474CBT3
STMicroelectronics Used in: Industrial Sensor Node (IoT Gateway)
STM32L051C8T3
STMicroelectronics Used in: Consumer Remote Control / BLE Beacon
STM32L072CZ[H6]
-40 to +125 C temperature-grade variant for medical industrial use Used in: USB Medical Data Logger
What is the core architecture of the STM32L072CZT6TR?
The STM32L072CZT6TR is based on the ARM Cortex-M0+ 32-bit core running up to 32 MHz. According to the ST datasheet DS9993, the Cortex-M0+ delivers 0.9 DMIPS/MHz and is the lowest-power member of ARM's Cortex-M family, optimized for deeply energy-constrained embedded designs. Combined with the STM32L0 ultra-low-power peripherals, this enables single-digit-microamp Stop mode currents suitable for battery-powered IoT.
How much Flash and SRAM does STM32L072CZT6TR have?
The STM32L072CZT6TR contains 192 KB of embedded Flash memory (192K x 8 organization) and 20 KB of SRAM. The 192 KB Flash supports read-while-write (RWW) operation and in-application programming via USART, SPI, I2C, or USB, per the ST datasheet. This memory density is sufficient for small RTOS deployments such as FreeRTOS with task stacks.
What is the supply voltage range of STM32L072CZT6TR?
The STM32L072CZT6TR operates from 1.65 V to 3.6 V without BOR (brown-out reset) option and from 1.8 V to 3.6 V with BOR enabled. According to the ST datasheet, separate VDDA and VDD pins allow the analog peripherals to be supplied independently. The internal 1.2 V LDO regulator powers the core, with bypass possible to further reduce Stop-mode current.
Does the STM32L072CZT6TR include USB?
Yes. The STM32L072CZT6TR integrates a USB 2.0 Full-Speed (12 Mbps) device interface that operates without an external 8 MHz crystal (crystal-less mode) by using the internal HSI48 RC oscillator with clock recovery. Per the ST datasheet, this eliminates a typical BOM cost (~USD 0.30) and reduces PCB area by the footprint of the crystal and load capacitors.
Where to buy STM32L072CZT6TR at qty 100?
At qty 100, the STM32L072CZT6TR is listed at approximately USD 3.60 per unit as of 2026-10-10 per DigiKey and Mouser distributor inventory data. Authorized stocking distributors include DigiKey, Mouser, LCSC, Arrow, and Avnet. Order codes STM32L072CZT6 (tray) and STM32L072CZT6TR (tape-and-reel) refer to the same die; the TR suffix denotes packaging only.
What is the lead time for STM32L072CZT6TR?
As of 2026-10-10, the STM32L072CZT6TR typically ships within 4-8 weeks factory lead time from STMicroelectronics with immediate stock at major authorized distributors (DigiKey and Mouser showing thousands of units in stock). For volume orders (>10 kpieces) expect 12-16 weeks. Lead time for tape-and-reel and tray variants is identical.
STM32L072CZT6 vs STM32L072CZT6TR - what is the difference?
STM32L072CZT6 and STM32L072CZT6TR are the same die in the same 48-LQFP package; the only difference is the packaging method. The non-TR variant ships in a tray (industrial pack); the TR suffix indicates Tape and Reel packaging for automated SMT assembly. Both have identical electrical and thermal specifications and are interchangeable in production BOMs.
Is the STM32L072CZT6TR suitable for USB battery-powered devices?
Yes, the STM32L072CZT6TR is highly suitable for USB-equipped battery-powered devices. Per ST datasheet, the device achieves ~0.8 uA typical current in Stop mode with RTC running while preserving USB session state, and the crystal-less USB removes the quiescent current of an external oscillator. Devices such as USB medical probes and wireless sensor bridges benefit directly from this combination.
What is the difference between STM32L072CZT6TR and STM32L052CZT6?
The STM32L072CZT6TR adds USB 2.0 Full-Speed connectivity, AES-128 hardware crypto, and a true random number generator (TRNG) compared to the STM32L052CZT6 which lacks those peripherals. Both share the same Cortex-M0+ core, 192 KB Flash, 48-LQFP package, and pinout, enabling drop-in PCB reuse when USB or AES is later required. The '7' in 072 vs '5' in 052 is ST's family-code for USB-equipped variants.
What is the best drop-in replacement for STM32L072CZT6TR?
The best same-package drop-in replacement is STM32L073CZT6 (same 48-LQFP, Cortex-M0+, 192 KB Flash, but adds AES-256 hardware crypto) for applications that need stronger encryption, or STM32L072CZ[H6][H3] temperature-grade variants for higher-temperature industrial use. Cross-brand, the GigaDevice GD32E230C[T6] is pin-compatible but uses Cortex-M23 and requires FW/BSP rewrite - it is footprint-compatible but NOT drop-in for firmware.
Where to download the STM32L072CZT6TR datasheet PDF?
The official STM32L072CZT6TR datasheet (document DS9993 referenced in the ST product page) is available as a free PDF at https://www.st.com/resource/en/datasheet/stm32l072cz.pdf. The document covers the full STM32L072x8/xB/xZ family (Flash densities 64/128/192 KB). For errata sheets, reference manuals (RM0376), and the STM32L0 HAL library, see the ST product page at https://www.st.com/en/microcontrollers-microprocessors/stm32l072cz.html.
Where can I find the STM32L072CZT6TR pinout?
The 48-LQFP pinout diagram for STM32L072CZT6TR is shown on pages 38-44 of the ST datasheet (DS9993). Pin 1 is located at the top-left of the package (notch-up orientation) following JEDEC MS-026 standard. For the standard ARM SWD (Serial Wire Debug) interface, connect PA13 (SWDIO) and PA14 (SWCLK); these pins also serve as TMS/TCK for legacy JTAG.
Can GD32E230C8T6 replace STM32L072CZT6TR in my design?
No - GD32E230C8T6 is footprint-compatible (same 48-LQFP) with STM32L072CZT6TR but NOT a true drop-in replacement. Per the article "STM32 vs GD32 vs CH32" published May 2026, pin-compatible does not equal code-compatible: the GD32E230 uses Cortex-M23 (not M0+), different register map, different Flash timing, and requires BSP porting. Engineers must re-validate firmware, ADC accuracy, and timing on the GD32 side before using it as a second source.
What package does the STM32L072CZT6TR use?
The STM32L072CZT6TR ships in a 48-lead Low-Profile Quad Flat Pack (48-LQFP) with 7x7 mm body size and 0.5 mm pin pitch, per the ST datasheet. The TR suffix denotes Tape and Reel packaging with 2,400 pieces per reel. Pin 1 is the dot-marker top-left; package height is 1.4 mm maximum, fitting within standard IPC-7351 land pattern guidelines for LQFP-48.
What are the key ultra-low-power specifications of STM32L072CZT6TR?
The STM32L072CZT6TR achieves six ultra-low-power modes per the ST datasheet: ~0.8 uA Stop mode with RTC, ~0.3 uA Standby with RTC, and ~0.03 uA Shutdown mode (no RTC). Run mode at 32 MHz draws about 6 mA (typical), and Low-Power Run at 32 kHz draws ~13 uA. Wakeup from Stop is under 5 us. These numbers make the part suitable for 10+ year battery life on a single CR2032 cell when duty-cycled.
Engineering reference data for STM32L072CZT6TR — comparison, design guidance, and compliance information.
Selection Guide
Choose STM32L072CZT6TR when you need an ultra-low-power Cortex-M0+ MCU with integrated USB 2.0 (crystal-less), AES-128 crypto, and 192 KB Flash for a tape-and-reel SMT production line. Select STM32L072CZT6 (non-TR tray) for prototyping or low-volume production where manual placement is acceptable. Choose STM32L073CZT6 if AES-256 is required (instead of AES-128). Choose STM32L052CZT6 only if USB is unused and you want a minimal-cost sibling. All three share the 48-LQFP 7x7 mm footprint and pinout, enabling drop-in PCB reuse across the family. Avoid using GigaDevice GD32E230 as a drop-in replacement - while footprint-compatible, it requires firmware re-validation; the GD32 is footprint-compatible but code-incompatible. For cost-sensitive designs without USB, the L052 variant or lower-density L051 may be more appropriate.
Comparison with Alternatives
| Parameter | This Product | STM32L072CZT6 | STM32L073CZT6 | STM32L052CZT6 |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Core / Max Frequency | ARM Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz |
| Flash / SRAM | 192 KB / 20 KB | 192 KB / 20 KB | 192 KB / 20 KB | 192 KB / 20 KB |
| USB 2.0 FS | Yes (crystal-less) | Yes (crystal-less) | Yes (crystal-less) | No |
| Hardware Crypto | AES-128 + TRNG | AES-128 + TRNG | AES-256 + TRNG | AES-128 + TRNG |
| Supply Voltage | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Tape and Reel | Yes (2400 / reel) | No (tray only) | Yes (TR variant exists) | Yes (TR variant exists) |
Key Differentiators
- Tape-and-reel packaging included by default (vs STM32L072CZT6)
- AES-128 + TRNG hardware crypto integrated (vs STM32L052CZT6)
- Stronger AES-256 crypto than L072 (vs STM32L073CZT6)
Design Notes
Decouple each VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the pin. Estimated: at Stop mode with RTC running, total quiescent current is approximately 0.8 uA per ST datasheet. For minimal power, leave unused I/O pins in Analog mode (no Schmitt trigger current) and disable peripherals via __HAL_RCC_*_CLK_DISABLE() in Stop mode before WFI. Use the integrated LDO voltage regulator bypass mode (LPRUN) to further reduce quiescent current at low CPU loads.
Route the USB DP/DM pair (PA11/PA12) as a 90-ohm differential pair per USB 2.0 spec, with no stubs and matched length within 1 mm. Keep the pair impedance-controlled (typically 90 ohms differential on a 4-layer board). Place the USB connector near the MCU. According to the ST datasheet, the crystal-less USB still requires the 1.5 kohm pull-up resistor on the DP line for full-speed device mode; do not omit this or the host will not enumerate the device.
Estimated: a common pitfall is using PB6/PB7 for I2C1 without external pull-ups - the L072 does not have internal I2C pull-ups on every package variant. Another pitfall is selecting a 5 V tolerant part - the STM32L072 is NOT 5 V tolerant; level shifters are needed for 5 V peripherals. Always check the bootloader configuration: BOOT0 pin (PB2) must be pulled low for normal operation after power-up or the device boots to bootloader ROM.
Compliance Information
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
Lead Free
Yes
Halogen Free
Unknown
Conflict Minerals
Compliant
RoHS and REACH compliance per ST product page. AEC-Q100 not applicable - choose STM32L0Q0 family variants for automotive. Lead-free finish per IPC JEDEC J-STD-020 MSL3 classification.
Data verified on: 2026-10-10
— data verified and curated by XAIPART's component engineering team
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Related Components & Terms
STMicroelectronics
STM32L072CZT6TR
STM32L072CZT6
STM32L073CZT6
STM32L052CZT6
ARM Cortex-M0+
ARM Cortex-M23
GigaDevice GD32E230
32-bit microcontroller
MCU
embedded processor
USB 2.0 Full-Speed
AES-128 hardware crypto
AES-256 hardware crypto
true random number generator (TRNG)
LQFP-48
LQFP 7x7 mm
JEDEC MS-026
JEDEC J-STD-020 MSL3
RoHS compliant
REACH compliant
IPC-7351 land pattern
smart metering
wearable health monitor
industrial IoT
low-power MCU
battery-powered device
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