STMicroelectronics STM32L433CCU6TR

Overview

STM32L433CCU6TR 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, integrated LCD controller (8×40), and external SMPS support. It targets battery-powered portable instrumentation, wearable health monitors, and smart sensor nodes requiring sub-µA standby operation and high analog integration.

For engineers reviewing the STM32L433CCU6TR datasheet, STM32L433CCU6TR pinout, STM32L433CCU6TR application, or STM32L433CCU6TR equivalent, key selection criteria include its 28 nA Standby mode (5 wakeup pins), 36 µA/MHz run efficiency in SMPS mode, 12-bit ADC at 5 Msps with hardware oversampling, and UFBGA64 (5 × 5 mm) package compatibility with space-constrained PCB layouts.

Technical Context

This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, paired with a dual-voltage domain architecture supporting both LDO and external SMPS (VDD12 = 1.05–1.15 V) for optimized power delivery. Its interconnect matrix decouples bus masters to reduce contention during concurrent peripheral access.

The device implements FlexPowerControl with seven low-power modes-including Stop 2 (1.28 µA with RTC) and Shutdown (8 nA)-and includes dedicated low-power timers (LPTIM1/LPTIM2) that remain active in Stop mode. The analog subsystem features independent supply domains, enabling simultaneous operation of 12-bit ADC, dual DACs, opamp with PGA, and two ultra-low-power comparators without digital noise coupling.

Key Specifications

Pinout & Package

STM32L433CCU6TR is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5 × 5 mm body size, compliant with ECOPACK2 environmental standards. Pin functions are defined per ST's DS11449 Rev 8, Section 4 (Pinouts and pin description).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, STM32L433CCU6TR adds LCD, TSC, and dual DACs-enabling richer user interfaces and analog flexibility. Versus STM32L476RGY6, it trades flash capacity and package size for lower static power and smaller UFBGA64 footprint-ideal for miniaturized, battery-sensitive designs.

Availability

STM32L433CCU6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart gas sensor nodes, programmable logic controller edge modules, and portable medical diagnostic devices requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L433CCU6TR 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.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-microwatt, integrating advanced power gating, adaptive voltage scaling, and rich analog peripherals for intelligent edge devices.

FAQ

What is the maximum operating temperature range for STM32L433CCU6TR?

The STM32L433CCU6TR is rated for −40 °C to 85 °C ambient operation, validated per ST's DS11449 Rev 8 Section 6.3.1. This industrial-grade temperature range supports reliable deployment in consumer wearables, building automation sensors, and portable test equipment without derating.

Does STM32L433CCU6TR support external SMPS, and how does it affect power efficiency?

Yes-it supports external SMPS via dedicated VDD12 pin (1.05–1.15 V). In SMPS-run mode, it achieves 36 µA/MHz versus 84 µA/MHz in LDO mode, reducing dynamic power by >57% and extending battery life significantly in sustained active operation.

Can the integrated LCD controller drive segment-based displays without external components?

Yes-the LCD controller supports 8×40 or 4×44 segments and includes an integrated step-up converter, eliminating the need for external charge pumps or bias generators. It operates directly from VDD (1.71–3.6 V) and supports static, 2-, 3-, or 4-mux configurations.

How many capacitive sensing channels does STM32L433CCU6TR provide, and what topologies are supported?

It provides 21 hardware-accelerated capacitive sensing channels via the Touch Sensing Controller (TSC), supporting touchkey, linear touch slider, and rotary touch wheel topologies. All sensing is performed autonomously with DMA offload, minimizing CPU intervention and power consumption.