STMicroelectronics STM32L100RCT6TR

Overview

STM32L100RCT6TR from STMicroelectronics is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller featuring 256 KB Flash, 16 KB SRAM, 4 KB EEPROM with ECC, integrated LCD driver (8×28 segments), USB 2.0 interface, dual 12-bit DACs, and 20-channel 12-bit ADC. It operates from 1.65–3.6 V across –40 °C to +105 °C and targets battery-powered portable instrumentation and smart sensors.

For engineers reviewing the STM32L100RCT6TR datasheet, STM32L100RCT6TR pinout, STM32L100RCT6TR application, or STM32L100RCT6TR equivalent, key selection criteria include standby current (0.29 µA), RTC-enabled stop mode (1.4 µA), 8.6 µA low-power run mode, 51 fast I/Os (42 5V-tolerant), and integrated true EEPROM with ECC-critical for data logging in energy-constrained systems.

Technical Context

The device implements a tightly coupled ARM Cortex-M3 core with MPU, running at up to 32 MHz (1.25 DMIPS/MHz), supported by multiple clock sources: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a dedicated 48 MHz PLL for USB. Dynamic voltage scaling enables three power-performance operating points.

Its ultra-low-power architecture includes five low-power modes (Run, Sleep, Low-power Run, Stop, Standby), each with configurable wakeup sources-including 3 dedicated standby pins and 16 stop-mode wakeup lines-and sub-µA retention states with RTC and backup registers active. The memory subsystem integrates ECC on both Flash and EEPROM for enhanced reliability in harsh environments.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 °C to +105 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L100RCT6TR, STM32L071RCT6 trades EEPROM and Flash for lower cost and smaller die size, while STM32L431RCT6 upgrades compute capability at the expense of ultra-low-power standby performance-making the L100 the optimal balance for EEPROM-dependent, battery-limited applications.

Availability

STM32L100RCT6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and low-power human-machine interfaces requiring stable component supply over extended product lifecycles.

Supply support for STM32L100RCT6TR 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 products for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications where energy efficiency, memory reliability, and integration density are critical-specifically engineered for battery-operated and energy-harvesting systems demanding multi-year operation without maintenance.

FAQ

What is the maximum operating frequency and core type of the STM32L100RCT6TR?

The STM32L100RCT6TR features an ARM Cortex-M3 core rated for up to 32 MHz operation, delivering 1.25 DMIPS/MHz performance. Its maximum frequency is constrained by the supply voltage range (1.65–3.6 V) and dynamic voltage scaling settings, with full 32 MHz achievable at VDD ≥ 2.4 V per datasheet Section 6.3.1.

Does the STM32L100RCT6TR include hardware error correction for its memory subsystem?

Yes, the device implements ECC (Error Correction Code) on both its 256 KB Flash memory and 4 KB true EEPROM. This provides single-bit error correction and double-bit error detection, ensuring data integrity in mission-critical applications such as utility metering and medical diagnostics where silent corruption is unacceptable.

How many I/O pins are 5V tolerant, and what is the total GPIO count?

The STM32L100RCT6TR provides 51 general-purpose I/O pins, of which 42 are 5V tolerant. These pins can safely interface with 5V logic without external level-shifting circuitry, simplifying design integration with legacy peripherals and industrial sensors operating at higher voltage levels.

What LCD capabilities does the STM32L100RCT6TR support, and how is it powered?

The device integrates an LCD controller supporting up to 8 commons and 28 segments (8×28), with an internal charge pump generating VLCD bias voltage. VLCD is supplied via dedicated pin and supports programmable contrast adjustment-enabling direct drive of static or multiplexed segment LCDs without external bias generators.