STMicroelectronics STM32L433RCY6TR

Overview

STM32L433RCY6TR 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 targets battery-powered portable medical devices, smart sensors, and industrial IoT edge nodes requiring sub-µA standby operation and high analog integration.

For engineers reviewing the STM32L433RCY6TR datasheet, STM32L433RCY6TR pinout, STM32L433RCY6TR application, or STM32L433RCY6TR 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 package compatibility with space-constrained PCB layouts.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash memory, and a dual-voltage domain architecture supporting external SMPS for optimized power delivery. Its interconnect matrix decouples bus masters to reduce contention during concurrent peripheral access.

Core peripherals include two 12-bit DACs with sample-and-hold, one operational amplifier with built-in programmable gain amplifier (PGA), two ultra-low-power comparators, and a 12-bit ADC capable of 16-bit resolution via hardware oversampling - all operating from independent analog supplies to minimize noise coupling.

Key Specifications

Pinout & Package

STM32L433RCY6TR uses a 64-ball Ultra-Fine-Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5 × 5 mm body size (package code A019 per ST documentation). Pin functions are defined per DS11449 Rev 8 Section 4 and Table 15.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433RCT6, the RCY6TR offers superior space efficiency and integrated LCD drive but lacks LQFP mechanical robustness; versus STM32L476RGY6TR, it trades crypto acceleration and flash capacity for lower system cost and native display capability in compact form factors.

Availability

STM32L433RCY6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart environmental sensors, industrial PLC edge modules, and portable medical diagnostic tools requiring stable component supply across multi-year production cycles.

Supply support for STM32L433RCY6TR 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, MEMS, and analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high analog integration, secure firmware execution, and long battery life - with the L433 variant optimized for cost-sensitive, space-constrained devices needing LCD and capacitive touch capability.

FAQ

What is the maximum operating frequency and core type of STM32L433RCY6TR?

The STM32L433RCY6TR features an Arm Cortex-M4 core with FPU, rated for up to 80 MHz operation delivering 100 DMIPS. It includes the ART Accelerator™ for zero-wait-state flash execution and a Memory Protection Unit (MPU) for secure task isolation in RTOS environments.

Does STM32L433RCY6TR support external SMPS, and what power savings does it enable?

Yes - the device supports external SMPS via dedicated VDD12 and VDD12_IO pins. In SMPS mode, active current drops to 36 µA/MHz (vs. 84 µA/MHz in LDO mode), reducing total system power by ~57% during sustained computation - critical for extending battery life in always-on sensing applications.

How many ADC channels and what resolution does the integrated ADC support?

The STM32L433RCY6TR includes one 12-bit ADC with up to 16 channels, capable of 5 Msps sampling. Hardware oversampling (up to 256×) enables effective resolutions of 14–16 bits at reduced throughput, and it operates from a dedicated VDDA supply to maintain accuracy under digital switching noise.

Is the UFBGA64 package of STM32L433RCY6TR compatible with standard reflow processes?

Yes - the UFBGA64 (A019) package is qualified for standard lead-free reflow profiles (J-STD-020). Its 0.5 mm pitch and 5 × 5 mm footprint require controlled stencil design and placement accuracy, but it is widely supported by contract manufacturers using Class III assembly lines and automated optical inspection (AOI).