STMicroelectronics STM8S903K3T3CTR

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM8S
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor STM8
Core Size 8-Bit
Speed 16MHz
Connectivity I2C, IrDA, LINbus, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 28
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
EEPROM Size 640 x 8
RAM Size 1K x 8
Voltage - Supply (Vcc/Vdd) 2.95V ~ 5.5V
Data Converters A/D 7x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 125°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 32-LQFP (7x7)
Package / Case 32-LQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM8S903K3T3CTR from STMicroelectronics is a robust 8-bit microcontroller designed for industrial and automotive applications. Featuring the STM8 core running at up to 16MHz, it delivers reliable performance. It includes 8KB Flash and 1KB RAM, along with essential peripherals like PWM, watchdog timer, and brown-out reset. Operating from 2.95V to 5.5V and housed in a 32-pin LQFP package, this MCU is built to withstand harsh conditions with an extended temperature range of -40°C to 125°C.

  • Wide Voltage Range (2.95V-5.5V): Directly interfaces with 5V logic and sensors, simplifying design.
  • Extended Temperature Range (-40°C to 125°C): Suitable for automotive and industrial environments.
  • High I/O Count (32-pin LQFP): Provides ample pins for complex control systems.
  • Robust 8-bit Core: Proven architecture with excellent EMC performance.
  • Integrated Peripherals: PWM, timers, and communication interfaces reduce external components.

Automotive Body Electronics

With a wide temperature range (-40°C to 125°C) and robust design, it can handle window lifters, wiper control, or lighting modules in vehicles.

Industrial Control Panels

Its 5V operation and rich I/O make it ideal for PLCs and relay control, providing reliable switching and monitoring in industrial environments.

Home Appliance Controllers

From washing machines to microwave ovens, this MCU can manage user interfaces, sensors, and motor control with its PWM and timers.

Power Tools

The high-temperature tolerance and PWM capabilities support variable speed control in drills or saws, ensuring durability under heavy load.

Smart Meters

Its low power consumption and accurate timers make it suitable for utility meters, enabling precise measurement and communication.

HVAC Systems

It can control fans, compressors, and valves in heating and cooling systems, with robust communication interfaces for remote monitoring.

Q: What is the core architecture of the STM8S903K3T3CTR?
A: It uses the STM8 8-bit core, designed for high performance and robustness.
Q: What is the operating voltage range?
A: It operates from 2.95V to 5.5V, making it compatible with 3.3V and 5V systems.
Q: What is the maximum clock speed?
A: The device runs at up to 16MHz, providing efficient processing for control applications.
Q: How much memory is available?
A: It has 8KB Flash and 1KB RAM, suitable for moderate-sized programs.
Q: What package is this MCU available in?
A: It comes in a 32-pin LQFP package, offering many I/O options.
Base Product Number : STM8S903K3
16MHz 1KB RAM 5V 8-bit MCU 8KB Flash automotive industrial LQFP-32 PWM STM8
Q: What is the core architecture of the STM8S903K3T3CTR?
A: It uses the STM8 8-bit core, designed for high performance and robustness.
Q: What is the operating voltage range?
A: It operates from 2.95V to 5.5V, making it compatible with 3.3V and 5V systems.
Q: What is the maximum clock speed?
A: The device runs at up to 16MHz, providing efficient processing for control applications.
Q: How much memory is available?
A: It has 8KB Flash and 1KB RAM, suitable for moderate-sized programs.
Q: What package is this MCU available in?
A: It comes in a 32-pin LQFP package, offering many I/O options.