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STMicroelectronics STM32L041E6Y6TR — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L041E6Y6TR MCU, ARM Cortex-M0+, 32 MHz, 32 KB Flash

MPNSTM32L041E6Y6TR
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STMicroelectronics STM32L0 series STM32L041E6Y6TR, ARM Cortex-M0+, 32-Bit Single-Core, 32MHz, 32KB Flash, 8K x 8 RAM, 1K x 8 EEPROM, 25-UFBGA/WLCSP, -40°C ~ 85°C.

$2.8400Ref. price · indicative, final on quote
STMicroelectronics STM32L041E6Y6TR datasheet (PDF)
Packaging25-UFBGA, WLCSP
RoHSROHS3 Compliant
SeriesSTM32L0
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L041E6Y6TR specifications
ParameterValue
SeriesSTM32L0
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed32MHz
PackageTape & Reel (TR) Cut Tape (CT)
RAM size8K x 8
Core size32-Bit Single-Core
EEPROM size1K x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)20
Core processorARM® Cortex®-M0+
Case25-UFBGA, WLCSP
Data convertersA/D 10x12b
Program memory size32KB (32K x 8)

Product details

32 MHz Cortex-M0+ with 32 KB Flash — the firmware-fit check

It also integrates 1 KB of embedded EEPROM, saving a separate serial EEPROM for calibration constants or boot-config data. The part targets battery-operated and energy-harvesting applications where sub-microwatt standby current is critical — think wireless sensor nodes, portable medical patches, and single-cell Li-ion powered controllers.

20 I/Os and a 10-channel 12-bit ADC in a 2.1×2.49 mm WLCSP

Twenty general-purpose I/Os in a 25-ball WLCSP (2.1x2.49 mm) give the layout engineer a tight fanout problem to solve — the package is sized for space-constrained PCBs, not breadboard prototyping. The 10-channel 12-bit ADC covers analog inputs for battery monitoring, sensor readout, or front-end signal conditioning.

The base product number STM32L041 is the root for density and package variants, so future pin-compatible drops (e.g., larger Flash or RAM) share the same footprint if you need to scale.

Frequently asked questions

What is the equivalent chip for STM32L041E6Y6TR?

The closest functional peer from the same ecosystem is the STM32L151CBU6A, which moves to a Cortex-M3 core at the same 32 MHz speed, adds USB and capacitive sensing, doubles the I/O count to 37, and includes a 2-channel DAC. The STM32L151CBU6A is not a pin-for-pin drop — it uses a different package and peripheral set — but it is a valid performance upgrade path if the STM32L041E6Y6TR's 20 I/Os and 32 KB Flash become limiting.

Can STM32L041E6Y6TR be programmed with ST-Link?

Yes. The STM32L0 series uses the standard SWD (Serial Wire Debug) interface, which the ST-Link programmer supports directly. The bootloader lives in system memory and does not steal from the 32 KB user Flash — step through the boot ROM to confirm the option bytes before the first production run.