STMicroelectronics STM32F051T8Y6TR

Overview

STM32F051T8Y6TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller in a 36-pin WLCSP package, featuring 64 KB Flash, 8 KB SRAM with hardware parity, and operating at up to 48 MHz. It integrates one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, two analog comparators, 11 timers (including advanced-control TIM1 with deadtime and emergency stop), RTC with alarm, and communication interfaces including two USARTs (one with LIN/IrDA/ISO7816), two I²C (one Fast Mode Plus), and two SPI (18 Mbit/s). It targets compact industrial control and sensor interface applications requiring low-voltage operation (2.0–3.6 V) and capacitive touch sensing.

For engineers reviewing the STM32F051T8Y6TR datasheet, STM32F051T8Y6TR pinout, STM32F051T8Y6TR application, or STM32F051T8Y6TR equivalent, key selection considerations include its WLCSP36 footprint for space-constrained designs, 5 V-tolerant I/O capability on up to 36 pins, integrated capacitive sensing (up to 18 channels), and support for Stop/Standby mode wakeup via RTC alarm or HDMI CEC header reception.

Technical Context

The device implements an ARM Cortex-M0 core with Harvard architecture, 3-stage pipeline, and Thumb-2 instruction set, delivering deterministic real-time performance at 48 MHz. Its memory subsystem includes 64 KB of single-cycle Flash with prefetch buffer and 8 KB of SRAM with hardware parity checking for fault-tolerant data storage.

Power management integrates programmable voltage detector (PVD), POR/PDR, and three low-power modes (Sleep, Stop, Standby) with VBAT backup for RTC and registers. Clock system combines internal RC oscillators (8 MHz HSI, 40 kHz LSI), external crystal support (4–32 MHz HSE, 32.768 kHz LSE), and PLL for precise frequency synthesis.

Key Specifications

Pinout & Package

STM32F051T8Y6TR uses a 36-ball WLCSP (Wafer-Level Chip Scale Package) measuring 2.6 × 2.7 mm with 0.4 mm pitch, optimized for ultra-compact PCB layouts in wearables and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F051T8Y6TR, STM32F030F4P6 offers lower cost and simpler toolchain support but omits DAC and touch sensing; STM32F070F6P6 trades analog capability for USB device functionality, making it suitable for firmware update interfaces rather than sensor-centric designs.

Availability

STM32F051T8Y6TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, consumer remote interfaces, and medical diagnostic instruments requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F051T8Y6TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding ARM Cortex-M0 performance, low-power operation, and rich peripheral integration - especially where small form factor and analog capability are critical.

FAQ

What is the maximum operating frequency and clock source configuration for STM32F051T8Y6TR?

The device runs at up to 48 MHz using its internal 8 MHz HSI oscillator multiplied by the PLL, or directly from an external 4–32 MHz crystal (HSE). The 48 MHz limit is enforced by the APB prescaler and flash wait-state configuration; exceeding it risks timing violations in peripheral access and ADC sampling.

Does STM32F051T8Y6TR support hardware CRC calculation, and how is it used in practice?

Yes, it includes a dedicated CRC calculation unit compliant with CRC-32 (IEEE 802.3). Engineers use it to verify firmware integrity during boot, validate configuration data stored in Flash or EEPROM, and ensure message authenticity in communication protocols - all in hardware with single-cycle throughput and no CPU overhead.

How many I/O pins are 5 V tolerant, and which specific pins support this feature?

Up to 36 I/Os are 5 V tolerant, covering all GPIO pins except those multiplexed with analog functions (e.g., ADC inputs, DAC output, VREF+). This includes PA0–PA15, PB0–PB15, and PC13–PC15 in the WLCSP36 package - confirmed in Section 6.3.14 of the datasheet (DocID022265 Rev 7, page 70).

Can the STM32F051T8Y6TR's DAC output drive a load directly, and what are its electrical limits?

The integrated 12-bit DAC has a rail-to-rail output swing (0 to VDDA) and can source/sink up to ±5 mA per channel. It drives resistive loads directly (e.g., op-amp inputs, LED biasing), but for capacitive or low-impedance loads, an external buffer is recommended to maintain linearity and settling time specs (typ. 12 µs to 1 LSB).