STMicroelectronics STM32L100C6U6TR

Overview

STM32L100C6U6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 10 KB SRAM, 2 KB EEPROM with ECC, integrated LCD driver (8×28 segments), and USB 2.0 interface. It operates from 1.8 V to 3.6 V across –40°C to +85°C and delivers 214 µA/MHz in Run mode, targeting battery-powered portable instrumentation and smart sensors.

For engineers reviewing the STM32L100C6U6TR datasheet, STM32L100C6U6TR pinout, STM32L100C6U6TR application, or STM32L100C6U6TR equivalent, key selection criteria include standby current (0.3 µA), 12-bit dual-channel DAC with output buffers, 12-bit 1 Msps ADC with up to 20 channels, and support for 51 fast I/Os - 42 of which are 5V-tolerant.

Technical Context

The STM32L100C6U6TR implements a multi-voltage-domain architecture with dynamic voltage scaling to optimize power across operating modes. Its clock system integrates six independent sources: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and a PLL supporting both CPU and USB (48 MHz) clocks.

Low-power operation is enforced via five hierarchical modes: Run, Sleep, Low-power Run, Stop (0.57 µA), and Standby (0.3 µA). The device includes a memory protection unit (MPU), hardware CRC engine, and pre-programmed USART bootloader - all validated for industrial-grade reliability under full production status since August 2017.

Key Specifications

Pinout & Package

STM32L100C6U6TR is packaged in UFQFPN48 (7 × 7 mm, 0.5 mm pitch), a space-constrained, thermally efficient leadless package suitable for compact portable designs requiring high I/O density and low profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L100C6U6TR, STM32L011K4U6 trades features for cost and size in minimal-footprint deployments, while STM32L412KB offers enhanced compute capability at the expense of higher active current and absence of LCD support - making the L100 optimal for display-integrated, battery-constrained edge devices.

Availability

STM32L100C6U6TR is available at Aetrix Electronics and suitable for portable medical diagnostics, smart wearable hubs, industrial wireless sensors, and energy-harvesting remote monitors requiring stable component supply across extended product lifecycles.

Supply support for STM32L100C6U6TR 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 analog components for industrial, automotive, and consumer markets.

The STM32L100 series belongs to ST's ultra-low-power MCU product line, engineered specifically for battery-operated and energy-constrained applications where sub-µA standby current, integrated analog peripherals, and long-term data retention are mandatory design requirements.

FAQ

What is the maximum operating frequency and core type of the STM32L100C6U6TR?

The STM32L100C6U6TR features an ARM Cortex-M3 core rated for up to 32 MHz operation. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1), delivering deterministic real-time performance while maintaining ultra-low power consumption - verified in production data dated August 2017 (DocID024295 Rev 6).

Does the STM32L100C6U6TR support USB functionality, and what are its electrical requirements?

Yes, it integrates a full-speed USB 2.0 interface with dedicated PA11 (D−) and PA12 (D+) pins. It requires no external PHY; only a 1.5 kΩ pull-up resistor on D+ for device enumeration. USB startup time is specified at 1.5 µs, and DC electrical characteristics comply with USB 2.0 FS specifications under 3.3 V VDD conditions.

How does the STM32L100C6U6TR manage ultra-low-power operation across different sleep states?

It provides five hierarchical low-power modes: Run (214 µA/MHz), Sleep, Low-power Run (9 µA), Stop (0.57 µA with 16 wakeup lines), and Standby (0.3 µA with 2 wakeup pins). All modes retain SRAM and register content except Standby, and wakeup latency is guaranteed under 8 µs - enabling rapid response to external events without sacrificing energy efficiency.

Is the STM32L100C6U6TR pin-compatible with other STM32L-series MCUs in the same package?

No - the STM32L100C6U6TR in UFQFPN48 is not pin-compatible with higher-density variants like STM32L152 or STM32L4xx due to differing peripheral mappings and signal assignments. Pin definitions are unique to the L100 series; migration requires PCB redesign and firmware adaptation, though software compatibility exists within the STM32Cube HAL framework.