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STMicroelectronics STM32L4R9ZIT6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L4R9ZIT6 MCU, ARM Cortex-M4 120 MHz, 2 MB Flash

MPNSTM32L4R9ZIT6
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STMicroelectronics STM32L4R9ZIT6, ARM Cortex-M4 32-bit MCU, 120 MHz, 2 MB Flash, 640 KB SRAM, 112 I/O, 144-LQFP (20x20), -40 to 85 °C, 1.71-3.6 V.

$18.7400Ref. price · indicative, final on quote
STMicroelectronics STM32L4R9ZIT6 datasheet (PDF)
Packaging144-LQFP
RoHSROHS3 Compliant
SeriesSTM32L4R
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L4R9ZIT6 specifications
ParameterValue
SeriesSTM32L4R
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed120MHz
PackageTray
RAM size640K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, I²C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG
Number of i (O)112
Core processorARM® Cortex®-M4
Case144-LQFP
Data convertersA/D 16x12b; D/A 2x12b
Program memory size2MB (2M x 8)

Product details

It carries 2 MB of Flash and 640 KB of SRAM, enough to run a graphical user interface stack, sensor fusion algorithms, or OTA update staging without external memory. The 144-LQFP package (20x20 mm) brings out 112 I/O pins, covering parallel display interfaces, external memory buses, and multiple serial peripherals.

Memory and peripheral headroom

With 2 MB of Flash and 640 KB of SRAM, this part sits in the high-density tier of the STM32L4 family. The 640 KB SRAM supports large frame buffers for LCD driving or multi-channel data logging.

Internal oscillator is available, though a precision external crystal is typical for CAN or USB timing.

It is ROHS3 compliant. No authorized-distributor stock level is implied — each lot is verified for date-code consistency and marking integrity before dispatch.

Frequently asked questions

Does the STM32L4R9ZIT6 have a built-in LCD controller?

Yes, the peripheral list includes LCD support, indicating an integrated LCD controller capable of driving a segment LCD directly without an external driver chip.

What is the closest functional second-source for the STM32L4R9ZIT6?

The STM32L151CBU6A from the STM32L1 series is a lower-performance sibling with a 32 MHz Cortex-M3 core, 37 I/O, and a smaller memory footprint. It is not a pin-compatible or direct replacement — the STM32L4R9ZIT6 offers 4x the clock speed, 2 MB Flash, 640 KB SRAM, and 112 I/O, making it a different tier for memory- and I/O-intensive designs.