STMicroelectronics STM32L433CCT6

Overview

STM32L433CCT6 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, 280 nA Standby with RTC, and supports capacitive touch sensing for battery-powered human-interface applications.

For engineers reviewing the STM32L433CCT6 datasheet, STM32L433CCT6 pinout, STM32L433CCT6 application, or STM32L433CCT6 equivalent, key selection criteria include ultra-low-power mode timing behavior, LCD segment drive capability (8×40), USB crystal-less operation, and dual 12-bit DAC channel availability in Stop 2 mode.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a dual-voltage domain architecture supporting external SMPS (VDD12 = 1.05–1.15 V) and main supply (VDD = 1.71–3.6 V). Its interconnect matrix enables concurrent peripheral access without bus contention.

Low-power operation is enforced via five distinct sleep modes - including Stop 2 with LPUART wake-up and 4 µs resume latency - and hardware-accelerated Batch Acquisition Mode (BAM) for sensor data collection without CPU intervention. The RTC includes hardware calendar, alarm, and calibration registers independent of power domain state.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad; 64-pin quad flat pack, 10 × 10 mm body, 0.5 mm lead pitch, RoHS-compliant ECOPACK2 finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, the STM32L433CCT6 adds LCD and SMPS support at modest cost increase; versus STM32L476RG, it trades flash capacity and USB OTG for lower static power and smaller footprint - making it optimal for display-equipped, battery-sensitive designs.

Availability

STM32L433CCT6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial HMI panels, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for STM32L433CCT6 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 STM32L4 series targets ultra-low-power embedded applications demanding rich peripheral integration, secure firmware execution, and long battery life - with the L433 variant optimized for display-driven, sensor-rich edge devices.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L433CCT6 operates at up to 80 MHz. In Run mode with ART Accelerator enabled and power supplied by external SMPS (VDD12 = 1.10 V), typical current consumption is 36 µA per MHz at 3.3 V VDD. At full 80 MHz, this yields ~2.88 mA total - verified per DS11449 Rev 8 Table 27 under "SMPS Run mode" conditions.

Does the device support hardware encryption or secure boot features?

The STM32L433CCT6 does not integrate AES or PKA accelerators. It supports secure boot via readout protection (RDP) Level 1/2, firewall isolation between memory regions, and tamper-detect GPIOs. Secure firmware updates require external crypto co-processors or software-based TLS stacks leveraging its TRNG and CRC units.

Can the LCD controller drive a 4×44 segment display without external components?

Yes. The integrated LCD controller supports 4×44 or 8×40 segment configurations with internal step-up converter and charge pump - eliminating need for external voltage boosters. It requires only external COM/SEG resistors and a 32.768 kHz LSE crystal for timing, as confirmed in Section 3.21 and Table 40 of DS11449 Rev 8.

What are the supported low-power modes and their wake-up sources?

The device supports Shutdown (8 nA, 5 wakeup pins), Standby (28 nA or 280 nA with RTC), Stop 2 (1.0 µA with RTC, LPUART wake-up), and Low-power Run (1.28 µA/MHz). Valid wake-up sources include EXTI lines, RTC alarms, LPUART start bit, comparator output, and TSC end-of-acquisition - all documented in Section 3.9.4 and Table 4 of DS11449 Rev 8.