STMicroelectronics STM32L011D4P6TR

Overview

STM32L011D4P6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN20 (3×3 mm) package, featuring 16 KB Flash, 2 KB SRAM, 512 B EEPROM with ECC, 12-bit ADC (1.14 Msps), and dual ultra-low-power comparators. It operates from 1.65–3.6 V across –40 to +125 °C and targets battery-powered sensor nodes and smart meters.

For engineers reviewing the STM32L011D4P6TR datasheet, STM32L011D4P6TR pinout, STM32L011D4P6TR application, or STM32L011D4P6TR equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled Stop mode (0.54 µA), 5 µs Flash wakeup time, and 23 I/Os with 5V tolerance - critical for energy-constrained embedded designs requiring long-term autonomy and mixed-voltage interfacing.

Technical Context

The device implements a tightly integrated ultra-low-power architecture: dynamic voltage scaling enables CPU operation from 32 kHz to 32 MHz, with multiple clock sources including factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, and multispeed MSI (65 kHz–4.2 MHz). Its power management includes five BOR thresholds, programmable PVD, and three low-power modes (Stop, Standby, Low-power Run) with configurable RAM retention.

Peripherals are optimized for minimal active and leakage current: the 12-bit ADC supports 10 channels down to 1.65 V supply, comparators feature window mode and wake-up capability, and DMA channels (5) offload CPU during conversions and serial transfers. All I/Os support independent configuration for low-leakage states in Stop/Standby modes.

Key Specifications

Pinout & Package

STM32L011D4P6TR uses the UFQFPN20 (3 × 3 mm, 0.5 mm pitch) package with 20 leads. This compact, near-chip-scale footprint supports high-density PCB layouts in space-constrained IoT endpoints and wearables.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L011D4P6TR, STM32L031F6P6 offers greater memory headroom at identical power and pinout, while EFM32ZG222F32 demands external components to match EEPROM, RTC retention, and 5V-tolerant I/O - increasing design complexity and bill-of-materials cost.

Availability

STM32L011D4P6TR is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, portable medical devices, and industrial predictive maintenance nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L011D4P6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components since 1987.

The STM32L0 Access line targets ultra-low-power embedded applications where battery life, small form factor, and integrated analog peripherals are critical - delivering Arm Cortex-M0+ performance with industry-leading sub-µA standby and RTC retention capabilities.

FAQ

What is the maximum operating frequency and corresponding power supply range for STM32L011D4P6TR?

The STM32L011D4P6TR operates up to 32 MHz across its full 1.65–3.6 V supply range, enabled by dynamic voltage scaling. At 32 MHz, minimum supply is 2.4 V; at lower frequencies (e.g., 16 MHz), it supports down to 1.65 V - allowing sustained operation across full battery discharge profiles without frequency throttling.

Does STM32L011D4P6TR support hardware encryption or secure boot features?

No. The STM32L011D4P6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based security implementations. For certified secure boot or encrypted firmware updates, consider STM32L071xx or STM32L5xxx series devices with dedicated security peripherals and TrustZone support.

Can the internal 16 MHz RC oscillator be used as the system clock without calibration?

Yes - the 16 MHz HSI oscillator is factory-trimmed to ±1% accuracy and can serve as the main system clock immediately after reset. No user calibration is required. However, for time-critical applications like UART communication at high baud rates (>1 Mbps), external crystal or PLL-based clocking is recommended to maintain timing margin.

How many I/O pins support 5V tolerance, and which ones are they?

23 I/O pins are 5V tolerant: PA0–PA7, PB0–PB10, and PA13–PA14 (SWDIO/SWCLK). This is confirmed in Section 3.7 (GPIOs) and Table 50 (I/O static characteristics) of the datasheet. Tolerance applies in both input and output modes, enabling direct interfacing with 5V logic without external level shifters.