STMicroelectronics STM32L4R5ZGY6TR

Overview

STM32L4R5ZGY6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 2 MB Flash, 640 KB SRAM, and integrated MIPI DSI host controller + LCD-TFT controller. It supports external SMPS for 43 µA/MHz run-mode efficiency and operates from -40 °C to 125 °C in industrial applications requiring high-resolution graphics and battery longevity.

For engineers reviewing the STM32L4R5ZGY6TR datasheet, STM32L4R5ZGY6TR pinout, STM32L4R5ZGY6TR application, or STM32L4R5ZGY6TR equivalent, key selection criteria include its dual-bank read-while-write Flash architecture, Chrom-ART Accelerator (DMA2D) for hardware-accelerated 2D graphics, 136 fast I/Os (most 5 V-tolerant), and support for up to 24 capacitive sensing channels in touch HMI designs.

Technical Context

This MCU implements an adaptive real-time memory accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 120 MHz. Its interconnect matrix routes up to 16 peripherals concurrently to multiple AHB/APB buses, supporting simultaneous operation of MIPI DSI, OctoSPI, and SDMMC without arbitration bottlenecks.

The device integrates three PLLs - one for system clock, one for USB/SDMMC, and one for audio SAI - with internal clock recovery (CRS) synchronized to USB SOF. Its low-power architecture includes Batch Acquisition Mode (BAM), Stop 2 mode (2.8 µA with RTC), and VBAT-supplied RTC + 32×32-bit backup registers in 305 nA retention mode.

Key Specifications

Pinout & Package

UFBGA144 package with 144 solder balls in 10 × 10 mm grid, 0.5 mm ball pitch, and standard JEDEC MO-277 footprint. Designed for automated reflow assembly and thermal reliability in extended-temperature environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M4 MCU applications.

Compared with STM32L4R5ZGY6TR, the STM32L4R5VGT6 trades I/O count and memory bandwidth for simpler packaging, while the STM32L4R9ZIJ6 extends graphics capability without changing footprint - both retain identical low-power modes and peripheral sets for migration flexibility.

Availability

STM32L4R5ZGY6TR is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart energy meters, and automotive diagnostic tools requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32L4R5ZGY6TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad IP portfolio.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics acceleration, and robust security - designed specifically for battery-operated and thermally constrained industrial and medical edge devices.

FAQ

What is the maximum operating temperature for STM32L4R5ZGY6TR?

The STM32L4R5ZGY6TR is rated for operation from –40 °C to +125 °C ambient temperature, validated per ST's industrial qualification standards. This extended range is enabled by its optimized power delivery architecture and thermal-aware silicon design, making it suitable for deployment in sealed enclosures or under-hood automotive auxiliary modules where passive cooling dominates.

Does STM32L4R5ZGY6TR support external memory interfaces beyond OctoSPI?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM with address/data multiplexing. Unlike OctoSPI (optimized for high-speed serial flash), FSMC provides parallel bus timing for legacy memory types and enables direct CPU access without DMA overhead, useful for real-time waveform capture buffers or legacy display controllers.

How does the Chrom-ART Accelerator reduce CPU load in GUI applications?

The Chrom-ART Accelerator (DMA2D) executes 2D graphics operations - including memory-to-memory copy, pixel format conversion (RGB565 ↔ ARGB8888), and alpha blending - autonomously via dedicated hardware. This offloads the Cortex-M4 core, reducing active CPU time by up to 70% during screen redraws and enabling consistent 60 fps refresh even with complex layered UIs running from internal SRAM.

Can STM32L4R5ZGY6TR operate without an external crystal?

Yes - it includes multiple internal oscillators: a 16 MHz RC (±1%), a low-power 32 kHz RC (±5%), and a multispeed 100 kHz–48 MHz oscillator auto-trimmed by the LSE crystal to better than ±0.25%. These allow full functionality (including USB and RTC) without external crystals, though LSE is required for highest RTC accuracy (±1 ppm) and CRS-based USB clock recovery.