STMicroelectronics STM32L433CCT6TR

Overview

STM32L433CCT6TR 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 FS, LCD controller, and integrated SMPS support. It delivers 36 µA/MHz in SMPS-run mode and supports -40 °C to 85 °C operation - deployed in battery-powered medical sensors and portable HMI displays.

For engineers reviewing the STM32L433CCT6TR datasheet, STM32L433CCT6TR pinout, STM32L433CCT6TR application, or STM32L433CCT6TR equivalent, key selection criteria include its dual-voltage regulator architecture (LDO/SMPS), 28 nA standby current with RTC, 83 GPIOs (most 5 V-tolerant), and hardware-accelerated LCD driving capability for low-power display subsystems.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture includes dual regulators - internal LDO and external SMPS interface - allowing dynamic voltage scaling between 1.1 V and 3.3 V.

It implements two PLLs (one for system clock, one for USB/audio), supports crystal-less USB FS via clock recovery, and features a dedicated low-power timer (LPTIM) that remains active in Stop 2 mode. The analog subsystem includes a 12-bit 5 Msps ADC with hardware oversampling, two 12-bit DACs, and an op-amp with built-in PGA for sensor signal conditioning.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK2; operates from 1.71 V to 3.6 V supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433CCT6TR, STM32L432KCU6 trades display capability and memory for smaller footprint and lower cost, while STM32L476RGT6 offers greater memory and USB speed at the expense of ultra-low-power efficiency and SMPS integration - making the L433 optimal for balanced display-enabled, battery-constrained designs.

Availability

STM32L433CCT6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial HMI panels, and wireless sensor nodes requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L433CCT6TR 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, specializing in microcontrollers, power management, and automotive ICs - with over 40 years of innovation in energy-efficient silicon design.

The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and robust security - designed specifically for IoT edge nodes, portable instrumentation, and smart metering systems.

FAQ

What is the maximum operating frequency and corresponding performance metric?

The STM32L433CCT6TR runs at up to 80 MHz using its Arm Cortex-M4 core with FPU, delivering 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance is sustained with zero wait states via the ART Accelerator™, even when executing from internal flash memory.

Does this MCU support crystal-less USB Full-Speed operation?

Yes - the STM32L433CCT6TR integrates a Clock Recovery System (CRS) that synchronizes the internal 48 MHz RC oscillator to the USB SOF packet, enabling fully crystal-less USB 2.0 Full-Speed operation. This eliminates the need for an external 12 MHz crystal and associated load capacitors, reducing BOM cost and PCB area.

What are the key low-power modes and their typical current consumption?

Key low-power modes include Shutdown (8 nA), Standby (28 nA), Standby with RTC (280 nA), Stop 2 with RTC (1.28 µA), and Run mode with SMPS (36 µA/MHz). These values are measured at 3.3 V with ART Accelerator enabled and represent typical conditions per ST's DS11449 Rev 8 datasheet.

Which package variant does the 'CCT6TR' suffix indicate?

The 'CCT6TR' suffix denotes the LQFP64 package (10 × 10 mm, 0.5 mm pitch), tape-and-reel packaging (TR), and commercial temperature range (–40 °C to +85 °C). The 'CC' prefix indicates 256 KB flash and 64 KB SRAM configuration within the STM32L433xx family.