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STMicroelectronics STM32L072CBU6 — Microcontrollers & Processors (MCU / MPU / DSP)
STMicroelectronics

STM32L072CBU6 ARM Cortex-M0+ MCU, 32 MHz, 128 KB Flash

MPNSTM32L072CBU6
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STMicroelectronics STM32L0 series STM32L072CBU6, ARM Cortex-M0+ 32-bit MCU, 32MHz, 128KB Flash, 20K x 8 RAM, 6K x 8 EEPROM, 40 I/O, 1.65V-3.6V, -40°C~85°C, 48-UFQFPN exposed pad, Tray.

$3.2985Ref. price · indicative, final on quote
STM32L072CBU6 datasheet
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Specifications

STM32L072CBU6 Technical Specifications
ParameterValue
SeriesSTM32L0
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed32MHz
PackageTray
RAM size20K x 8
Core size32-Bit Single-Core
EEPROM size6K x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, SPI, UART/USART, USB
Number of i (O)40
Core processorARM® Cortex®-M0+
Case48-UFQFN Exposed Pad
Data convertersA/D 13x12b; D/A 2x12b
Program memory size128KB (128K x 8)

Product details

48-UFQFPN — rework and layout notes

This part comes in a 48-UFQFPN with an exposed thermal pad (7x7 mm body). The pad needs a good via stitch to the ground plane to pull heat out; without it the junction temperature climbs fast under continuous load. The small pitch and no leads mean the reflow profile wants a tight soak zone — too fast a ramp and you get head-in-pillow joints. Orientation mark is pin 1 chamfer on the top-left corner, easy to spot under a microscope. Will it survive the hot air? Yes, if you preheat the board to 100°C and use a nozzle that covers the whole body, not a tiny pencil tip.

Peripherals and connectivity

On the peripheral side you get I²C, SPI, UART/USART, USB, and IrDA, plus a 13-channel 12-bit ADC and a 2-channel 12-bit DAC. With 40 I/O in a 48-pin package, most of the pins are usable — good for a design that needs a few buttons, an LCD segment driver, and a sensor interface without a port expander.

Frequently asked questions

What is the difference between STM32L072CBU6 and STM32L073CBU6?

The STM32L073CBU6 is the higher-density sibling in the same package and pinout. It doubles the Flash to 192 KB and adds a few more peripheral features (e.g., additional comparators and capacitive sensing channels). For designs that need more code space or extra analog blocks, the L073 is the step-up; the L072 covers the 128 KB tier with the same core and supply range.