STMicroelectronics STM8S207C8T3TR

Overview

STM8S207C8T3TR from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 64 KB Flash, 2 KB data EEPROM, 10-bit ADC with 16 channels, two UARTs (one CAN-capable), SPI, I²C, and advanced timers including TIM1 with dead-time insertion. It targets automotive body electronics, industrial motor control, and smart sensor nodes requiring robust CAN 2.0B communication and low-power operation.

For engineers reviewing the STM8S207C8T3TR datasheet, STM8S207C8T3TR pinout, STM8S207C8T3TR application, or STM8S207C8T3TR equivalent, key selection criteria include its integrated beCAN interface, SWIM single-wire debug support, 68 I/O capability in LQFP80, 2.95–5.5 V wide supply range, and 300 kcycle EEPROM endurance - critical for firmware updates and parameter storage in field-deployed systems.

Technical Context

The STM8S207C8T3TR implements a 3-stage pipelined STM8 core with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQ lines. Its clock system integrates trimmable 16 MHz RC, low-power 128 kHz RC, crystal oscillator, and clock security monitor for fail-safe timing.

Peripheral integration includes a dedicated beCAN 2.0B controller (1 Mbit/s), dual UARTs with LIN 2.1 compliance, 10 Mbit/s SPI, 400 kbit/s I²C, and three 16-bit timers (TIM1 advanced, TIM2/TIM3 general-purpose) plus an 8-bit basic timer - enabling precise PWM generation, motor commutation, and synchronized wake-up events.

Key Specifications

Pinout & Package

LQFP80 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit MCU applications.

Compared with STM8S207C8T3TR, STM8S207M8T6 trades CAN integration for smaller footprint and lower cost, while STM8AF5288 adds AEC-Q100 qualification and higher temperature tolerance at the expense of broader industrial availability and pricing.

Availability

STM8S207C8T3TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and smart energy metering requiring stable component supply and long-term manufacturing continuity.

Supply support for STM8S207C8T3TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM8S series targets cost-sensitive, high-reliability embedded applications demanding robust peripherals, low-power operation, and streamlined development - especially where CAN, LIN, or EEPROM persistence is essential.

FAQ

Does STM8S207C8T3TR support in-system programming via SWIM?

Yes. The device supports full in-system programming and debugging through the single-wire SWIM interface using standard ST-LINK/V2 or compatible programmers. SWIM enables flash erase/write, option byte configuration, and real-time register inspection without halting CPU execution - critical for field firmware updates and production programming.

What is the maximum operating frequency with 3.3 V supply?

At VDD = 3.3 V, the STM8S207C8T3TR supports a maximum CPU frequency of 16 MHz with zero wait states, as confirmed by the fCPUmax vs. VDD curve (Figure 12 in DS). Operation above 16 MHz at 3.3 V is not guaranteed and may result in timing violations or instability.

Can the integrated EEPROM be used for storing calibration data across power cycles?

Yes. The 2 KB true data EEPROM is specifically designed for parameter storage with 300 kcycle endurance and 20-year data retention at 55 °C. It supports byte- and page-level writes, and its contents persist independently of Flash memory - making it ideal for storing sensor calibration coefficients, device IDs, or user configuration settings.

Is external CAN transceiver required for beCAN operation?

Yes. The STM8S207C8T3TR contains only the CAN protocol controller (beCAN); an external physical-layer transceiver (e.g., TJA1042, MCP2551) is mandatory to drive the differential CAN_H/CAN_L bus lines and provide fault protection, slew-rate control, and common-mode rejection.