STMicroelectronics STM32L443CCT6

Overview

STM32L443CCT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 256 KB flash, 64 KB SRAM, USB FS, LCD controller, and hardware AES encryption. It operates at up to 80 MHz (100 DMIPS), supports -40 °C to 105 °C, and achieves 280 nA Standby with RTC-enabling long-life battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM32L443CCT6 datasheet, STM32L443CCT6 pinout, STM32L443CCT6 application, or STM32L443CCT6 equivalent, key selection criteria include its 83 fast I/Os (most 5 V-tolerant), dual 12-bit DACs with sample-and-hold, 12-bit ADC at 5 Msps, low-power timers active in Stop mode, and integrated LCD driver supporting 8×40 segments.

Technical Context

The STM32L443CCT6 integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, and a dual-PLL clock system supporting independent USB (48 MHz), audio (SAI), and system clocks. Its interconnect matrix decouples bus arbitration for deterministic peripheral access.

It features a dedicated low-power subsystem with two ultra-low-power 16-bit timers available in Stop mode, LPUART with Stop 2 wake-up capability, and hardware-accelerated AES-128/256-enabling secure, real-time edge processing without CPU intervention.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433CCT6, the STM32L443CCT6 adds SAI, CAN, SDMMC, and larger SRAM-making it suitable for richer connectivity and local data buffering. Versus STM32L552CCT6, it trades advanced security for lower static power and broader legacy toolchain compatibility.

Availability

STM32L443CCT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable diagnostic devices, and industrial sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L443CCT6 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, integrated analog, and rich connectivity-optimized for battery-operated IoT endpoints and portable equipment.

FAQ

What is the maximum operating temperature range for STM32L443CCT6?

The STM32L443CCT6 is rated for operation from -40 °C to +105 °C ambient temperature. This extended industrial temperature grade is confirmed in Section 6.3.1 of DS11421 Rev 6 and applies to all LQFP64 variants. It supports reliable deployment in environments such as smart meters and industrial gateways where thermal margins exceed standard commercial ranges.

Does STM32L443CCT6 support crystal-less USB Full-Speed operation?

Yes. The STM32L443CCT6 integrates a USB 2.0 Full-Speed PHY with internal clock recovery (CRS), enabling crystal-less USB operation. As specified in Section 3.34 and Table 42 of DS11421 Rev 6, it achieves ±0.25% accuracy using the internal 48 MHz RC oscillator trimmed by the LSE, eliminating the need for an external 48 MHz crystal and reducing BOM cost and PCB area.

How many I/O pins are 5 V-tolerant on STM32L443CCT6?

Up to 83 I/O pins on the STM32L443CCT6 are 5 V-tolerant, as stated in the "Features" summary on page 1 of DS11421 Rev 6. This includes all GPIOs except those assigned to analog functions (e.g., ADC inputs, DAC outputs) and specific system pins like NRST and BOOT0. The tolerance is verified under DC conditions per Section 6.3.14.

Is the LCD controller capable of driving a 4×44 segment display without external components?

Yes. The integrated LCD controller supports both 8×40 and 4×44 configurations with an on-chip step-up converter and programmable bias generation. As detailed in Section 3.21 and Table 1 of DS11421 Rev 6, it operates from a single 3.3 V supply and requires no external charge pump or resistor networks-reducing bill-of-materials and layout complexity for monochrome segment displays.