STMicroelectronics STM32L4R5ZIY6TR

Overview

STM32L4R5ZIY6TR 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 for embedded graphics applications. It supports external SMPS, achieves 43 µA/MHz in SMPS-run mode, and delivers 150 DMIPS performance.

For engineers reviewing the STM32L4R5ZIY6TR datasheet, STM32L4R5ZIY6TR pinout, STM32L4R5ZIY6TR application, or STM32L4R5ZIY6TR equivalent, key selection criteria include ultra-low-power operation down to 33 nA shutdown, dual-bank read-while-write Flash, hardware-accelerated graphics (Chrom-ART/DMA2D), MIPI DSI lane support at 500 Mbit/s, and 136 fast I/Os with 5 V tolerance.

Technical Context

The device integrates an adaptive real-time accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 120 MHz, and a multi-AHB interconnect matrix supporting concurrent access to Flash, SRAM, and peripherals. Its power architecture includes three low-power modes-Shutdown (33 nA), Standby (125 nA), and Stop 2 with RTC (2.8 µA)-all supported by brownout reset and flexible voltage scaling.

Graphics subsystem comprises Chrom-ART Accelerator (DMA2D) for 2D composition and Chrom-GRC (GFXMMU) for memory optimization, coupled with MIPI DSI Host (dual lanes, 500 Mbit/s each) and LTDC for RGB/parallel display driving. Analog integration includes dual 12-bit DACs, two op-amps with PGA, and 12-bit ADC at 5 Msps with hardware oversampling up to 16-bit resolution.

Key Specifications

Pinout & Package

STM32L4R5ZIY6TR is housed in a UFBGA144 (10 × 10 mm, 0.5 mm pitch) package with 132 signal pins and 12 power/ground terminals. Pin functions are defined per STM32L4R5xx datasheet Section 4 (Pinouts and pin description), with dedicated supply domains (VDD, VDDA, VDDIO2, VBAT), multiple clock inputs (HSE, LSE, HSI, MSI), and configurable alternate functions across all GPIO banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIY6TR, STM32L4R9VIY6TR trades display capability for simpler packaging, while STM32U575ZIT6 prioritizes security and ultra-low active power over integrated graphics-making the ZIY6TR uniquely suited for cost-sensitive, display-rich ultra-low-power applications.

Availability

STM32L4R5ZIY6TR is available at Aetrix Electronics and suitable for smart medical wearables, industrial HMI panels, portable diagnostic devices, and energy-efficient smart meters requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L4R5ZIY6TR 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 since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics acceleration, and extended battery life-especially in portable medical, industrial HMI, and smart metering systems.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32L4R5ZIY6TR?

The STM32L4R5ZIY6TR operates at up to 120 MHz using its Arm Cortex-M4 core with FPU. It delivers 150 DMIPS measured under Dhrystone 2.1, equating to 1.25 DMIPS/MHz. This performance is sustained with zero wait states thanks to the ART Accelerator, which caches Flash accesses for deterministic real-time execution.

Does the STM32L4R5ZIY6TR support external memory expansion, and if so, what interfaces are available?

Yes, it supports external memory via three dedicated interfaces: Flexible Static Memory Controller (FSMC) for SRAM, PSRAM, NOR, NAND, and FRAM; and two independent OctoSPI controllers supporting x8/x4/x2/x1 protocols for high-speed serial flash or RAM. These allow seamless expansion beyond on-chip 2 MB Flash and 640 KB SRAM.

How does the STM32L4R5ZIY6TR achieve ultra-low-power operation in display-driven applications?

It combines multiple low-power strategies: MIPI DSI and LTDC can operate in Stop mode with selective clock gating; Chrom-ART (DMA2D) offloads graphics tasks from the CPU; and the 2.8 µA Stop 2 mode retains RTC and SRAM while keeping display subsystem clocks active. This enables instant wake-up and smooth UI transitions without full system restart.

Is the STM32L4R5ZIY6TR pin-compatible with other members of the STM32L4R5xx family, and what package options share identical pinout?

Yes, all STM32L4R5xx variants in the UFBGA144 package-including STM32L4R5ZIY6TR-are fully pin-compatible. The same 144-ball layout is used across ZI, QI, and VI suffixes in this package. However, pin compatibility does not extend to LQFP144, UFBGA132, or WLCSP144 variants due to differing ball/pad counts and signal allocations.