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STMicroelectronics STM32L151CBU6A — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L151CBU6A STMicroelectronics ARM Cortex-M3 MCU, 32 MHz

MPNSTM32L151CBU6A
End of Life

STMicroelectronics STM32L1 series 32-bit ARM Cortex-M3 MCU, STM32L151CBU6A, 32 MHz, 128 KB Flash, 32 KB RAM, 4 KB EEPROM, USB, 12-bit ADC/DAC, 48-UFQFPN.

$6.55Ref. price · indicative, final on quote
STMicroelectronics STM32L151CBU6A datasheet (PDF)
Packaging48-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32L1
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L151CBU6A specifications
ParameterValue
SeriesSTM32L1
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed32MHz
PackageTray
RAM size32K x 8
Core size32-Bit Single-Core
EEPROM size4K x 8
PeripheralsBrown-out Detect/Reset, Cap Sense, DMA, I²S, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART, USB
Number of i (O)37
Core processorARM® Cortex®-M3
Case48-UFQFN Exposed Pad
Data convertersA/D 16x12b; D/A 2x12b
Program memory size128KB (128K x 8)

Product details

32 MHz ARM Cortex-M3, 128 KB Flash — what it means for a low-power BOM

The 1.8 V to 3.6 V supply range lets it run directly from a single Li-ion cell or two alkaline batteries, and the -40 °C to 85 °C temperature grade covers industrial and outdoor enclosures. On-chip peripherals include USB, I²C, SPI, UART, a 12-bit ADC with 16 channels, and a 12-bit DAC with two channels, so a typical application is a battery-powered data logger or a sensor node that talks to a host over USB without an external transceiver.

Supply range and USB — the fit for single-cell battery designs

USB connectivity is built in.

48-UFQFPN — board layout and thermal note

Frequently asked questions

Does STM32L151CBU6A have USB?

Yes, USB is included in the connectivity set alongside I²C, SPI, UART, IrDA, and LINbus.

What is the maximum clock speed of STM32L151CBU6A?

The core runs at 32 MHz.

Is STM32L151CBU6A a replacement for STM32L151CBU6?

The 'A' suffix typically indicates a die revision or manufacturing site change; the part is functionally equivalent and pin-compatible with the non-A version. Verify the specific errata and revision letter in the STM32L1 reference manual for your application.