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STMicroelectronics STM32L021D4P7TR — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM32L021D4P7TR ARM Cortex-M0+ MCU, 32 MHz, 14-TSSOP

MPNSTM32L021D4P7TR
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STMicroelectronics STM32L021D4P7TR, ARM Cortex-M0+ 32-bit MCU, 32 MHz, 16 KB Flash, 2 KB RAM, 512 B EEPROM, 14-TSSOP, -40 to 105°C.

$1.2514Ref. price · indicative, final on quote
STMicroelectronics STM32L021D4P7TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32L021D4P7TR specifications
ParameterValue
SeriesSTM32L0
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C ~ 105°C (TA)
Speed32MHz
PackageTape & Reel (TR)
RAM size2K x 8
Core size32-Bit Single-Core
EEPROM size512 x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, SPI, UART/USART
Number of i (O)11
Core processorARM® Cortex®-M0+
Case14-TSSOP (0.173\", 4.40mm Width)
Data convertersA/D 4x12b
Program memory size16KB (16K x 8)

Product details

The STM32L021D4P7TR is a 32-bit ARM Cortex-M0+ MCU from STMicroelectronics, running at 32 MHz and packing 16 KB of Flash, 2 KB of RAM, and 512 bytes of EEPROM in a 14-TSSOP package.

Memory and peripheral budget — sized for a single control loop or sensor interface

With 16 KB of program Flash and 2 KB of RAM, this MCU is not meant for a GUI stack or a complex RTOS — it's sized for a single control loop, a Modbus RTU slave, or a sensor hub that reads one or two analog inputs and drives a PWM output. The 11 available GPIOs, combined with I²C, SPI, and UART connectivity, are enough to talk to a radio module, an ADC, and a few discrete sensors.

Frequently asked questions

What is STM32L021D4P7TR's listed speed?

The core runs at 32 MHz, which is the maximum clock speed for this ARM Cortex-M0+ implementation.