STM8S105K4U6ATR

Microcontrollers Overview

The STM8S105K4U6ATR is an 8-bit microcontroller from the STM8S Access line, manufactured by STMicroelectronics. It features a 16 MHz CPU clock and integrates 16 Kbytes of Flash program memory with 2 Kbytes of RAM. The device includes 1 Kbyte of true data EEPROM and operates within a voltage range of 2.95 V to 5.5 V. It utilizes a 32-UFQFPN (5x5) surface-mount package with a bare pad. Key peripherals include seven 10-bit ADC channels, I2C, SPI, UART/USART, IrDA, and LINbus interfaces. The unit supports an operating temperature range of -40°C to 85°C.

Microcontrollers Feature Summary

• Integrates true data EEPROM for high endurance data retention without external components.
• Provides robust system performance through a 16 MHz advanced core with Harvard architecture.
• Supports flexible clock control with multiple master sources and a clock security system.
• Includes comprehensive communication interfaces such as LINbus, IrDA, and standard serial protocols.

Microcontrollers Applications

• Industrial control systems requiring robust I/O and watchdog features
• Consumer appliances utilizing low-power operation and integrated EEPROM
• Automotive applications compatible with LINbus and IrDA standards

Microcontrollers Procurement Notes

Verify the specific suffix U6A against official STMicroelectronics documentation to confirm pinout and package dimensions match the design requirements. Ensure the ordering code corresponds to the tape-and-reel packaging format indicated by the ATR designation. Cross-reference the component marking with the manufacturer's latest datasheet to prevent counterfeit substitution during assembly.

Microcontrollers Selection Notes

Select this model when a compact 32-pin UFQFPN footprint is required alongside 16 KB of program memory. It is suitable for designs needing integrated EEPROM and multiple communication interfaces in a small form factor. Consider alternative packages like LQFP if higher pin counts or different thermal characteristics are necessary for the application.

Microcontrollers Part Context

This component belongs to the STM8S105x4/6 access line, which offers medium-density devices within the broader STM8S family. These microcontrollers are designed for cost-sensitive applications while maintaining high integration levels. The series provides scalability across common family architectures, allowing for easy migration between different memory sizes and pin configurations within the same ecosystem.

Microcontrollers Replacement Considerations

STM8S105K4U6A: Identical electrical specifications and memory configuration; verify if the 'R' suffix denotes a specific reel packaging variant that matches inventory needs.