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STMicroelectronics STM32L081CZU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L081CZU6 ARM Cortex-M0+ MCU, 32 MHz, 192 KB Flash

MPNSTM32L081CZU6
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STMicroelectronics STM32L0 series, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 192 KB Flash, 20 KB SRAM, 6 KB EEPROM, 40 I/O, 48-UFQFN exposed pad, -40°C to 85°C.

$3.4798Ref. price · indicative, final on quote
STMicroelectronics STM32L081CZU6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32L081CZU6 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, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)40
Core processorARM® Cortex®-M0+
Case48-UFQFN Exposed Pad
Data convertersA/D 13x12b
Program memory size192KB (192K x 8)

Product details

ARM Cortex-M0+ at 32 MHz — the ultra-low-power workhorse

The STM32L081CZU6: Runs at 32 MHz with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM.

192 KB Flash + 6 KB EEPROM — memory mix for field-updatable designs

192 KB Flash (192 K x 8) and 20 KB SRAM. 6 KB EEPROM stores calibration constants without wearing Flash. 40 I/O lines in the 48-UFQFPN (7x7 mm) package.

The 13-channel 12-bit ADC is enough for reading multiple analog sensors — thermistors, potentiometers, current shunts — without an external mux. The internal reference is adequate for 8-bit accuracy; for the full 12-bit range a cleaner external reference improves INL.

The base product number is STM32L081, and the full family includes density and package variants that share the same peripheral set, so a migration to a larger Flash or different pin count stays within the same firmware base.

Frequently asked questions

What is the closest pin-compatible alternative to STM32L081CZU6?

Within the STM32L0 series, the STM32L071CZU6 and STM32L073CZU6 share the same 48-UFQFPN footprint and pinout but differ in Flash and SRAM densities. The STM32L081CZU6 sits at the higher end with 192 KB Flash and 20 KB SRAM plus 6 KB EEPROM, so a drop-in replacement would be another STM32L081 variant in the same package. No second-source manufacturer produces a pin-compatible part for this exact order code.