STMicroelectronics
STM32L072CZT6TR - 192KB Flash Cortex-M0+ USB MCU | STMicroelectronics
MPN： STM32L072CZT6TR ✓ 啟用中
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
MOQ： 1 |
STM32L072CZT6TR 概覽
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.
直接替換替代品，適用於 STM32L072CZT6TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM32L072CZT6TR （相同外形與佔位） — 差異在於 ADC, Communication Interfaces, Core, Timers.
STMicroelectronics
ADC: 12-bit, hardware oversampling
Communication Interfaces: I2C, SPI, USART, USB
Core: ARM Cortex-M0+ (32-bit)
比較對象 STM32L072CZT6TR →
STM32L072CZT6
✅ 直接替換STMicroelectronics
📦 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)
聯絡詢價
查看資料表 →STM32L073CZT6
✅ 直接替換 ⚠️ 規格未經驗證STMicroelectronics
📦 48-LQFP (7x7)
Ultra-low-power 32-bit microcontroller · Arm Cortex-M0+ · 32 MHz · 192 KB · 20 KB · 6 KB · 12 bit
聯絡詢價
查看資料表 →STM32L052CZT6
✅ 直接替換 ⚠️ 規格未經驗證📦 48-LQFP (7x7)
lacks USB and AES (L052 vs L072 family), 192 KB Flash, same die
📋 參考替代品（不在目錄中）
STM32L072CZT6TR 最大額定值與電氣特性
| Core | ARM Cortex-M0+ 32-bit |
| 最大時脈頻率 | 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) |
| 工作溫度範圍 | -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 |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
| Lead-Free Finish | Yes |
STM32L072CZT6TR 腳位配置
| 腳位 1 | PB7 — I2C1_SDA / general-purpose I/O / TIM4_CH2 |
| 腳位 2 | PB8 — I2C1_SCL / TIM4_CH3 / GPIO |
| 腳位 3 | PB9 — I2C1_SDA (alt) / TIM4_CH4 / GPIO |
| 腳位 4 | VDD — Digital supply voltage 1.65-3.6 V |
| 腳位 5 | VSS — Digital ground |
| 腳位 6 | OSC_IN — External 32.768 kHz crystal input |
| 腳位 7 | OSC_OUT — External 32.768 kHz crystal output |
| 腳位 8 | NRST — Reset input (active low) |
| 腳位 9 | PA0 — WKUP / ADC_IN0 / TIM2_CH1 |
| 腳位 10 | PA1 — ADC_IN1 / TIM2_CH2 / GPIO |
| 腳位 11 | PA2 — USART2_TX / ADC_IN2 / GPIO |
| 腳位 12 | PA3 — USART2_RX / ADC_IN3 / GPIO |
| 腳位 13 | PA4 — SPI1_NSS / ADC_IN4 / GPIO |
| 腳位 14 | PA5 — SPI1_SCK / ADC_IN5 / GPIO |
| 腳位 15 | PA6 — SPI1_MISO / ADC_IN6 / GPIO |
| 腳位 16 | PA7 — SPI1_MOSI / ADC_IN7 / GPIO |
| 腳位 17 | PB0 — ADC_IN8 / TIM3_CH3 / GPIO |
| 腳位 18 | PB1 — ADC_IN9 / TIM3_CH4 / GPIO |
| 腳位 19 | PB2 — BOOT0 / GPIO |
| 腳位 20 | PB10 — I2C2_SCL / USART3_TX / GPIO |
| 腳位 21 | PB11 — I2C2_SDA / USART3_RX / GPIO |
| 腳位 22 | VSS — Digital ground |
| 腳位 23 | VDD — Digital supply voltage 1.65-3.6 V |
| 腳位 24 | PB12 — SPI2_NSS / GPIO |
| 腳位 25 | PB13 — SPI2_SCK / TIM21_CH1 / GPIO |
| 腳位 26 | PB14 — SPI2_MISO / TIM21_CH2 / GPIO |
| 腳位 27 | PB15 — SPI2_MOSI / GPIO |
| 腳位 28 | PA8 — RCC_MCO / TIM1_CH1 / GPIO |
| 腳位 29 | PA9 — USART1_TX / TIM1_CH2 / GPIO |
| 腳位 30 | PA10 — USART1_RX / TIM1_CH3 / GPIO |
| 腳位 31 | PA11 — USB_DM / I2C1_SDA (alt) / GPIO |
| 腳位 32 | PA12 — USB_DP / I2C1_SCL (alt) / GPIO |
| 腳位 33 | PA13 — SWDIO / IFR_PB (IR out) / GPIO |
| 腳位 34 | VSS — Digital ground |
| 腳位 35 | VDD — Digital supply voltage 1.65-3.6 V |
| 腳位 36 | PA14 — SWCLK / IFR_PA (IR out) / GPIO |
| 腳位 37 | PA15 — SPI1_NSS (alt) / TIM2_CH1 / GPIO |
| 腳位 38 | PB3 — SWO / SPI1_SCK (alt) / GPIO |
| 腳位 39 | PB4 — SPI1_MISO (alt) / TIM3_CH1 / GPIO |
| 腳位 40 | PB5 — SPI1_MOSI (alt) / TIM3_CH2 / GPIO |
| 腳位 41 | PB6 — USART1_TX (alt) / I2C1_SCL / GPIO |
| 腳位 42 | VDDA — Analog supply voltage (to ADC/DAC) |
| 腳位 43 | VSSA — Analog ground |
| 腳位 44 | VREF+ — ADC reference voltage input (tie to VDDA) |
| 腳位 45 | PC13 — RTC_TAMP / GPIO (special pin, no wakeup) |
| 腳位 46 | PC14 — OSC32_IN (32.768 kHz crystal) |
| 腳位 47 | PC15 — OSC32_OUT (32.768 kHz crystal) |
| 腳位 48 | VSS — Digital ground |
典型應用
STM32L072CZT6TR 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
STM32L052CZT6
Lower-cost sibling without USB/AES, pin-compatible for non-USB designs 用於： USB Battery-Powered Sensor Dongle
STM32L073CZT6
Adds AES-256 hardware crypto for secure USB devices 用於： USB Battery-Powered Sensor Dongle
STM32L072CZT6
STMicroelectronics 用於： Smart Metering (Water/Gas/Heat)
STM32G474RBT6
STMicroelectronics 用於： Smart Metering (Water/Gas/Heat)
STM32H730IBK6Q
STMicroelectronics 用於： Wearable Health Monitor
STM32G474CBT3
STMicroelectronics 用於： Industrial Sensor Node (IoT Gateway)
STM32L051C8T3
STMicroelectronics 用於： Consumer Remote Control / BLE Beacon
STM32L072CZ[H6]
-40 to +125 C temperature-grade variant for medical industrial use 用於： 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.
工程參考資料，適用於 STM32L072CZT6TR — 比較、設計指引及合規資訊。
選型指南
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.
與替代品比較
| 參數 | 本產品 | 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) |
主要差異化特點
- Tape-and-reel packaging included by default (對比STM32L072CZT6)
- AES-128 + TRNG hardware crypto integrated (對比STM32L052CZT6)
- Stronger AES-256 crypto than L072 (對比STM32L073CZT6)
設計說明
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.
合規資訊
RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
無鉛
Yes
無鹵
Unknown
衝突礦產
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.
資料驗證日期： 2026-10-10
— 資料由 XAIPART 元件工程團隊驗證及整理
相關搜尋
STM32L072CZT6TR
STM32L072CZT6TR datasheet
STM32L072CZT6TR STMicroelectronics
STM32L072CZT6TR price qty 100
STM32L072CZT6TR pinout 48-LQFP
STM32L072CZT6 vs STM32L072CZT6TR
STM32L072CZT6TR drop-in replacement
ultra low power Cortex-M0+ USB MCU
STM32L072CZT6TR for battery powered sensor
STM32L072CZT6TR lead time 2026
where to buy STM32L072CZT6TR online
STM32L072CZT6TR AES-128 crypto MCU
相關元件與詞彙
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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