STMicroelectronics STM32L011K4T6D

Overview

STM32L011K4T6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in a 32-pin LQFP 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 V to 3.6 V across –40 °C to +125 °C and targets battery-powered sensor nodes and smart meters requiring sub-1 µA standby current.

For engineers reviewing the STM32L011K4T6D datasheet, STM32L011K4T6D pinout, STM32L011K4T6D application, or STM32L011K4T6D equivalent, key selection criteria include verified 0.23 µA Standby mode (2 wakeup pins), 5 µs Flash wakeup time, 76 µA/MHz Run-mode efficiency, and support for ISO 7816/IRDA via its USART - all confirmed in ST's production data DocID027973 Rev 5.

Technical Context

The STM32L011K4T6D integrates a Cortex-M0+ core running at up to 32 MHz with dynamic voltage scaling, supported by multiple clock sources: 16 MHz factory-trimmed HSI (±1%), 32 kHz LSE for RTC, and a multispeed MSI RC (65 kHz–4.2 MHz). Its low-power architecture includes five operational modes - Run, Sleep, Low-power Run, Stop, and Standby - each with rigorously characterized current consumption and wakeup latency.

Peripheral interconnect is managed via an AHB/APB matrix supporting concurrent DMA transfers to ADC, SPI, I²C, USART, and timers. The device implements hardware ECC on both Flash and EEPROM, and embeds a 96-bit unique ID plus CRC calculation unit for firmware integrity verification.

Key Specifications

Pinout & Package

The STM32L011K4T6D is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant and ECOPACK®2 certified. Pin functions are defined per ST's official pin definitions table (Table 13, DocID027973 Rev 5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L031K4T6, the STM32L011K4T6D trades DAC and advanced timer capability for lower BOM cost and identical ultra-low-power metrics - ideal where analog output isn't needed. Versus EFM32HG322F64G, it provides integrated EEPROM and ISO 7816 but less RAM and Flash, making it optimal for cost-sensitive, functionally focused metering endpoints.

Availability

STM32L011K4T6D is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial asset trackers, and medical wearable patches requiring stable component supply over extended product lifecycles.

Supply support for STM32L011K4T6D 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 semiconductors since 1987.

The STM32L0 series is ST's ultra-low-power access-line MCU product line, engineered specifically for battery-operated IoT endpoints where multi-year operation on coin cells or energy harvesters is mandatory.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32L011K4T6D?

The STM32L011K4T6D runs at up to 32 MHz using its HSI16 oscillator (±1%) or PLL. At 32 MHz and 3.0 V, typical Run-mode current is 76 µA/MHz (2.43 mA total), verified per Table 22 in DocID027973 Rev 5. Dynamic voltage scaling reduces core voltage at lower frequencies to further cut power.

Does the STM32L011K4T6D support hardware encryption or secure boot features?

No. The STM32L011K4T6D does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based security implementations. For secure boot, designers must use external secure elements or migrate to STM32L5/L4+ series with TrustZone or proprietary secure firmware solutions.

Can the internal 12-bit ADC measure signals below 1.65 V?

No. The ADC's minimum operating supply is 1.65 V, and its input voltage range is 0 to VREF+ (typically VDD). With VDD = 1.65 V, the smallest measurable full-scale range is 0–1.65 V. Sub-1.65 V signals require external signal conditioning (e.g., PGA or level-shifting amplifier) to fit within the ADC's valid input window.

Is the STM32L011K4T6D pin-compatible with other STM32L0x1 devices in the same package?

Yes - the STM32L011K4T6D in LQFP32 is pin-compatible with other STM32L011x4 variants (e.g., STM32L011E4T6, STM32L011F4T6) and shares identical pin definitions per Table 13. However, it is not pin-compatible with STM32L031 or STM32L051 devices due to differing peripheral mappings and alternate function allocations.