STMicroelectronics STM8S903K3T3CTR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 15+ | $2.13 | $31.95 |
| 25+ | $2.09 | $52.25 |
| 50+ | $1.97 | $98.50 |
| 100+ | $1.74 | $174.00 |
| N+ | $0.35 | Price Inquiry |
Request Quote / Inquiry
| 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 |
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.
- 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.

STM8S903K3T3CTR.pdf