STM8S105K4T6C

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FAQ

Q: How does the STM8S105 compare to the STM8S005?
A: Both have 2 KB SRAM and LQFP-32 packages, but the S105 has 16 KB Flash and 1 KB EEPROM while the S005 has 32 KB Flash and only 128 bytes EEPROM. Choose the S005 if Flash size is the bottleneck (large firmware + bootloader); choose the S105 if EEPROM size matters (multi-profile configuration, battery

Q: Can the STM8S105 run Bluejay at 96 kHz PWM?
A: Yes. Bluejay firmware supports the STM8S105 target. At 96 kHz PWM, the commutation loop must complete in ~10.4 µs — within the capability of the 16 MHz STM8 core (~0.0625 µs per instruction). The 2 KB SRAM is sufficient for Bluejay's runtime data structures plus bidirectional DShot telemetry bufferi

1. Product Overview

The STM8S105K4T6C delivers the largest EEPROM (1 KB) in the STM8 Access Line — a standout feature for drone applications requiring extensive non-volatile storage without consuming Flash. The 1 KB EEPROM can store 8–10 complete ESC parameter profiles , months of battery cycle history , or calibration data for multiple sensors — all with 300,000 write-cycle endurance per byte, far exceeding Flash emulation approaches. With 4× 16-bit timers (vs. 3 on the S003/S103), the S105 adds a basic timer for timebase generation or simple PWM, and the window watchdog provides enhanced system reliability monitoring — important for safety-critical BMS applications where an MCU hang must trigger a protection-FET cutoff within a defined window. The 2 KB SRAM and 16 KB Flash provide comfortable headroom for B

2. Key Features

• 1 KB True EEPROM — Industry-Leading for 8-Bit MCU
• 4× 16-Bit Timers — Extra PWM and Timebase Flexibility
• Window Watchdog — Safety-Critical BMS Reliability

3. Technical Specifications

4. Applications

• BLHeli_S ESC with Multi-Profile Configuration Storage
• Smart Drone Battery BMS with History Logging
• Drone Sensor Aggregation Node

5. Supply Solutions

Aurora supports customers with STM8S105K4T6C sourcing through verified global supply channels. We help OEMs and manufacturers manage availability challenges, production requirements, and lifecycle risks with flexible procurement solutions.

6. Quality Assurance

All components supplied by Aurora follow strict quality control procedures, including supplier verification, documentation review, inspection, and traceability management to ensure product authenticity and reliability.

7. Alternative & Replacement Solutions

When original STM8S105K4T6C components face shortages, lifecycle changes, or long lead times, Aurora helps customers identify suitable alternative components based on technical requirements, application needs, and supply conditions.

8. Request Quote / Contact

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