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STMicroelectronics STM32L073CZU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L073CZU6 ARM Cortex-M0+ MCU, 32MHz, 192KB Flash

MPNSTM32L073CZU6
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STMicroelectronics STM32L0 Series, ARM Cortex-M0+, 32-Bit Single-Core, 32MHz, 192KB Flash, 20K x 8 RAM, 6K x 8 EEPROM, 48-UFQFN Exposed Pad, -40°C~85°C.

$6.6100Ref. price · indicative, final on quote
STMicroelectronics STM32L073CZU6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32L073CZU6 specifications
ParameterValue
SeriesSTM32L0
MountingSurface 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, I²S, LCD, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART, USB
Number of i (O)37
Core processorARM® Cortex®-M0+
Case48-UFQFN Exposed Pad
Data convertersA/D 10x12b; D/A 2x12b
Program memory size192KB (192K x 8)

Product details

What the 32 MHz Cortex-M0+ means for battery-powered designs

The STM32L073CZU6 carries 192 KB of Flash, 20 KB of SRAM, and 6 KB of embedded EEPROM. The 48-UFQFN package with exposed pad (7x7 mm) keeps board area tight and thermal transfer to the PCB straightforward.

Memory budget: 192 KB Flash, 20 KB RAM, 6 KB EEPROM

The 192 KB program Flash is sized for mid-complexity firmware — think a Modbus RTU stack with a PID loop, or a simple GUI-driven thermostat. The 20 KB SRAM leaves room for moderate-size data buffers and a real-time OS with a handful of tasks. The 6 KB EEPROM (emulated in Flash or true EEPROM depending on the variant) stores calibration constants and configuration parameters without needing an external serial EEPROM. If your firmware image is tight on space, the 192 KB ceiling is worth checking early in the design phase.

Frequently asked questions

What is an alternative to STM32L073CZU6?

Within the STM32L0 series, the STM32L073CZT6 offers the same core and memory in a 48-LQFP package. The LQFP variant is easier to hand-solder and inspect, but the UFQFN is 1 mm thinner for height-constrained assemblies.

Is STM32L073CZU6 compatible with 3.3V logic?

Yes. All I/O pins are 5 V tolerant when configured as inputs, but output high level tracks VDD — at 3.3 V supply it drives a valid 3.3 V CMOS logic level.