STMicroelectronics STM8S003K3T6C

Overview

STM8S003K3T6C from STMicroelectronics is an 8-bit value-line microcontroller featuring a 16 MHz STM8 core, 8 Kbyte Flash memory, 128-byte data EEPROM, 10-bit ADC with 5 channels, three timers (including advanced control timer TIM1), and UART/SPI/I²C interfaces. It operates from 2.95 V to 5.5 V and targets cost-sensitive industrial control, appliance motor management, and sensor interface applications.

For engineers reviewing the STM8S003K3T6C datasheet, STM8S003K3T6C pinout, STM8S003K3T6C application, or STM8S003K3T6C equivalent, key selection criteria include its LQFP32 package with 28 I/Os (21 high-sink), SWIM debug interface, low-power modes (halt/active-halt/wait), and integrated 16 MHz RC oscillator with user trimming capability.

Technical Context

The STM8S003K3T6C implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution. Its clock system integrates four sources: external crystal/resonator, external clock input, trimmable 16 MHz internal RC, and low-power 128 kHz RC - all monitored by a clock security system.

Interrupt handling uses a nested controller supporting 32 vectors and up to 27 external interrupts across six priority levels. Memory subsystem includes 8 Kbyte Flash (20-year data retention at 55 °C), 1 Kbyte RAM, and 128-byte true EEPROM rated for 100 k write/erase cycles.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed pad for thermal performance. Pinout validated per STMicroelectronics DS7147 Rev 10, Section 5.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S003F3U6, the STM8S003K3T6C provides more I/Os and advanced timer capability in LQFP32; versus STM8L051F3P6, it trades ultra-low power for higher performance and wider voltage range - making it optimal for mains-powered industrial edge nodes.

Availability

STM8S003K3T6C is available at Aetrix Electronics and suitable for industrial motor control, home appliance interface, and smart lighting applications requiring stable component supply and long-term production support.

Supply support for STM8S003K3T6C 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM8S value line targets cost-sensitive embedded applications requiring robust peripherals, low-voltage operation, and proven reliability - with STM8S003K3T6C optimized for entry-level control tasks where Flash size, I/O count, and timer sophistication balance BOM cost and functionality.

FAQ

What debug interface does STM8S003K3T6C support?

The STM8S003K3T6C uses the Single-Wire Interface Module (SWIM) for on-chip programming and non-intrusive debugging. It requires only one dedicated pin (SWIM) and supports full read/write access to Flash, RAM, and registers during runtime without halting execution - eliminating the need for dedicated debug headers or complex JTAG infrastructure.

Does STM8S003K3T6C support hardware UART automatic baud rate detection?

No, the STM8S003K3T6C UART does not implement automatic baud rate detection. Baud rate is configured via the UARTDIV register using integer division of the APB clock. However, it supports LIN master mode with configurable sync byte and break detection, enabling robust serial communication in automotive and industrial networks.

Can the internal 16 MHz RC oscillator be calibrated for improved accuracy?

Yes, the internal 16 MHz RC oscillator includes a user-trimmable calibration register (CLK_HSICALR) allowing adjustment in steps of ±0.5% across a ±8% total range. Calibration is performed at power-up or runtime using a known reference (e.g., external crystal or precise timer measurement), achieving ±1% typical accuracy after trimming.

What is the maximum operating temperature range for STM8S003K3T6C?

The STM8S003K3T6C is specified for industrial temperature range: –40 °C to +85 °C. This is confirmed in STMicroelectronics' DS7147 Rev 10, Section 9.3 (Operating Conditions), and applies to all LQFP32-packaged variants including the T6C suffix. Thermal derating is not required within this ambient range under recommended PCB layout and power dissipation limits.