STMicroelectronics STM8S208C6T3

Overview

STM8S208C6T3 from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 32 KB Flash, 1 KB EEPROM, 2 KB RAM, integrated CAN 2.0B controller, dual UARTs (one LIN-capable), SPI, I²C, and 10-bit ADC with 16 channels - deployed in automotive body control modules, industrial sensor nodes, and smart HVAC actuators.

For engineers reviewing the STM8S208C6T3 datasheet, STM8S208C6T3 pinout, STM8S208C6T3 application, or STM8S208C6T3 equivalent, key selection criteria include CAN bus integration, SWIM single-wire debug support, 2.95–5.5 V wide supply range, low-power active-halt mode (0.35 µA typ), and LQFP48 package compatibility with legacy STM8S footprint constraints.

Technical Context

The STM8S208C6T3 implements a 3-stage pipeline Harvard architecture core with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQs across 6 vectors. Its clock system integrates user-trimmable 16 MHz RC, 128 kHz low-power RC, and crystal oscillator with clock security monitor.

Peripheral subsystems include an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs for motor control, two 16-bit general-purpose timers (TIM2/TIM3), an 8-bit basic timer (TIM4), beCAN 2.0B interface operating at 1 Mbit/s, and ADC2 with programmable sampling time and analog watchdog.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat lead-free RoHS-compliant housing with exposed thermal pad (EP). Pin functions validated per STMicroelectronics DocID14733 Rev 13, Section 5.1 and Figure 5 (LQFP48 pinout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S207C8T6, the STM8S208C6T3 trades Flash capacity for lower cost and smaller die size while retaining full CAN functionality; versus STM32F042F6P6, it delivers superior CAN-native determinism and lower system-level BoM cost despite 8-bit architecture.

Availability

STM8S208C6T3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart HVAC actuators requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for STM8S208C6T3 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-grade components since 1987.

The STM8S series targets cost-sensitive, high-reliability 8-bit embedded applications in automotive, industrial, and appliance markets, emphasizing CAN integration, ultra-low-power modes, and robust debug infrastructure.

FAQ

Does STM8S208C6T3 support in-system programming via SWIM?

Yes. The device supports full in-system programming (ISP) and debugging through the Single Wire Interface Module (SWIM) using only the SWIM pin and ground. No external bootloader is required; programming can be performed at any voltage within the 2.95–5.5 V operating range, including during low-power active-halt mode.

What is the maximum operating temperature range for STM8S208C6T3?

The STM8S208C6T3 is qualified for industrial temperature range: –40 °C to +85 °C ambient. All electrical characteristics-including Flash write/erase endurance, ADC accuracy, and CAN timing-remain guaranteed across this full range per STMicroelectronics DocID14733 Rev 13, Section 10.3.

Can the internal 16 MHz RC oscillator meet CAN timing requirements?

No. While the trimmable 16 MHz RC achieves ±1% accuracy after calibration, CAN 2.0B bit timing requires ≤±0.5% oscillator tolerance for reliable 1 Mbit/s operation. ST recommends using the HSE crystal oscillator (4–16 MHz) or external clock source for CAN-conformant designs.

How many CAN message objects does the beCAN peripheral support?

The beCAN controller supports 16 message objects (mailboxes), each configurable as transmit or receive with individual identifier masking, priority arbitration, and FIFO buffering. This enables concurrent handling of multiple CAN IDs (e.g., diagnostics, control, status) without CPU intervention.