STMicroelectronics STM32L476RCT6TR

Overview

STM32L476RCT6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB flash, 64 KB SRAM, USB OTG FS, LCD controller, and integrated SMPS support. It delivers 39 µA/MHz in SMPS-run mode, 420 nA Standby with RTC, and supports capacitive touch sensing for battery-powered industrial HMI and portable medical devices.

For engineers reviewing the STM32L476RCT6TR datasheet, STM32L476RCT6TR pinout, STM32L476RCT6TR application, or STM32L476RCT6TR equivalent, key selection criteria include ultra-low-power mode current (e.g., 30 nA Shutdown), dual 12-bit DAC channels, 3× 12-bit ADCs at 5 Msps, LQFP64 package compatibility, and CAN 2.0B interface integration.

Technical Context

This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a flexible power architecture with internal LDO and external SMPS support. It features three independent PLLs - system, USB, and audio - and a hardware interconnect matrix for concurrent peripheral access without bus contention.

The analog subsystem includes two operational amplifiers with programmable gain, two ultra-low-power comparators, and four digital filters for sigma-delta modulators. Its LCD controller drives up to 8×40 segments with integrated step-up converter, and the TSC supports 24 capacitive sensing channels for touchkey and rotary control.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad, 0.5 mm pitch, RoHS-compliant and ECOPACK2 certified. Designed for compact PCB layouts with high I/O density and thermal efficiency in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, the STM32L476RCT6TR adds LCD, CAN, and 4× more flash/SRAM for HMI-rich edge devices; versus STM32L552RET6, it trades security extensions for lower power and integrated display support in non-certified applications.

Availability

STM32L476RCT6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L476RCT6TR 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 STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time performance - optimized for IoT edge nodes, portable medical devices, and energy-conscious HMI systems.

FAQ

What is the maximum operating temperature range for STM32L476RCT6TR?

The STM32L476RCT6TR is rated for industrial operation from –40 °C to +85 °C. This temperature grade is confirmed in the official datasheet (DS10198 Rev 11, Section 6.3.1) and applies to all LQFP64 variants of the STM32L476xx family, including the 'R' density (256 KB flash) configuration.

Does STM32L476RCT6TR support external memory interfaces?

No - the STM32L476RCT6TR (LQFP64 package) does not implement the Flexible Static Memory Controller (FSMC) or Quad SPI (QUADSPI) interfaces. These peripherals are only available on larger packages (LQFP100+, UFBGA132+) per Table 2 of DS10198 Rev 11. The LQFP64 variant retains full USB OTG FS, CAN, and LCD functionality but omits external memory expansion.

How many I/O pins are available on the LQFP64 package?

The STM32L476RCT6TR in LQFP64 provides 51 general-purpose I/O pins (GPIOs), all configurable with multiple alternate functions. This count excludes dedicated power, reset, and oscillator pins. Pin definitions and alternate function mappings are fully documented in Section 4 ("Pinouts and pin description") and Table 16 of DS10198 Rev 11.

Is the internal RC oscillator accurate enough for UART communication?

Yes - the internal multispeed oscillator (MSI), auto-trimmed by the 32 kHz LSE, achieves better than ±0.25% accuracy across voltage and temperature. This meets the ±2% tolerance required for standard UART baud rates (e.g., 115.2 kbps) without external crystal, enabling crystal-free designs where cost and board space are constrained.