STM8S208R8T6 - 8-Bit 24MHz 64KB Flash MCU | STMicroelectronics
MPN: STM8S208R8T6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.1 | $41.00 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.8 | $2,800.00 |
STM8S208R8T6 Overview
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data bus, integrating a CPU, memory, and peripherals. The STM8S series is a family of 8-bit MCUs from STMicroelectronics, positioned between low-end 8-bit devices and 32-bit ARM-based MCUs. It offers a cost-effective solution for applications requiring moderate processing power, rich peripherals, and low power consumption. The STM8S208R8T6 belongs to the performance line, which provides higher clock speeds and more memory compared to access line devices.
Key features include a 24 MHz maximum CPU frequency with 0 wait states, 64KB of Flash memory, 6KB of RAM, and 2KB of EEPROM. It integrates a 10-bit ADC with up to 16 channels, multiple 16-bit timers, two UARTs, SPI, I2C, and a CAN interface. The device also includes a watchdog timer, brown-out reset, and low-power modes, enhancing reliability and energy efficiency.
The STM8S208R8T6 is built on ST's advanced 8-bit core architecture, which delivers up to 20 MIPS at 24 MHz. It features a Harvard architecture with separate instruction and data buses, allowing simultaneous instruction fetch and data access. The integrated EEPROM enables non-volatile data storage without external components, and the CAN interface supports robust communication in automotive and industrial networks.
Typical applications include industrial control systems, home appliances, automotive body electronics, and communication modules. The CAN interface makes it ideal for automotive networks, while the rich timer and ADC peripherals suit motor control and sensor interfacing. The wide operating voltage range (2.95V to 5.5V) ensures compatibility with both 3.3V and 5V logic systems.
When designing with this MCU, ensure proper decoupling of the power supply and a stable clock source. The device supports multiple clock sources, including an internal RC oscillator and external crystal. For low-power applications, utilize the halt and active-halt modes to reduce current consumption. The CAN interface requires an external transceiver, such as the TJA1050, for physical layer connectivity.
Drop-in alternatives for STM8S208R8T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM8S208RBT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM8S207R8T6
✅ Drop-In📋 Reference alternative (not in catalog)
STM8S207RBT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM8S208R8T6 Maximum Ratings & Electrical Characteristics
| Core | STM8 8-bit |
| Maximum CPU Frequency | 24 MHz |
| Flash Memory | 64 KB (64K x 8) |
| RAM | 6 KB |
| EEPROM | 2 KB |
| Operating Voltage | 2.95 V to 5.5 V |
| ADC Resolution | 10-bit |
| ADC Channels | 16 |
| Timers | Multiple 16-bit timers |
| UARTs | 2 |
| SPI | 1 |
| I2C | 1 |
| CAN | 1 |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
STM8S208R8T6 Pin Configuration
| Pin 1 | VSS — Ground |
| Pin 2 | VDD — Power supply |
| Pin 3 | PA0 — General purpose I/O |
| Pin 4 | PA1 — General purpose I/O |
| Pin 5 | PA2 — General purpose I/O |
| Pin 6 | PA3 — General purpose I/O |
| Pin 7 | PA4 — General purpose I/O |
| Pin 8 | PA5 — General purpose I/O |
| Pin 9 | PA6 — General purpose I/O |
| Pin 10 | PA7 — General purpose I/O |
| Pin 11 | PB0 — General purpose I/O |
| Pin 12 | PB1 — General purpose I/O |
| Pin 13 | PB2 — General purpose I/O |
| Pin 14 | PB3 — General purpose I/O |
| Pin 15 | PB4 — General purpose I/O |
| Pin 16 | PB5 — General purpose I/O |
| Pin 17 | PB6 — General purpose I/O |
| Pin 18 | PB7 — General purpose I/O |
| Pin 19 | PC0 — General purpose I/O |
| Pin 20 | PC1 — General purpose I/O |
| Pin 21 | PC2 — General purpose I/O |
| Pin 22 | PC3 — General purpose I/O |
| Pin 23 | PC4 — General purpose I/O |
| Pin 24 | PC5 — General purpose I/O |
| Pin 25 | PC6 — General purpose I/O |
| Pin 26 | PC7 — General purpose I/O |
| Pin 27 | PD0 — General purpose I/O |
| Pin 28 | PD1 — General purpose I/O |
| Pin 29 | PD2 — General purpose I/O |
| Pin 30 | PD3 — General purpose I/O |
| Pin 31 | PD4 — General purpose I/O |
| Pin 32 | PD5 — General purpose I/O |
| Pin 33 | PD6 — General purpose I/O |
| Pin 34 | PD7 — General purpose I/O |
| Pin 35 | PE0 — General purpose I/O |
| Pin 36 | PE1 — General purpose I/O |
| Pin 37 | PE2 — General purpose I/O |
| Pin 38 | PE3 — General purpose I/O |
| Pin 39 | PE4 — General purpose I/O |
| Pin 40 | PE5 — General purpose I/O |
| Pin 41 | PE6 — General purpose I/O |
| Pin 42 | PE7 — General purpose I/O |
| Pin 43 | PF0 — General purpose I/O |
| Pin 44 | PF1 — General purpose I/O |
| Pin 45 | PF2 — General purpose I/O |
| Pin 46 | PF3 — General purpose I/O |
| Pin 47 | PF4 — General purpose I/O |
| Pin 48 | PF5 — General purpose I/O |
| Pin 49 | PF6 — General purpose I/O |
| Pin 50 | PF7 — General purpose I/O |
| Pin 51 | NRST — Reset (active low) |
| Pin 52 | OSCIN — Oscillator input |
| Pin 53 | OSCOUT — Oscillator output |
| Pin 54 | VSS — Ground |
| Pin 55 | VDD — Power supply |
| Pin 56 | VCAP — Internal regulator capacitor |
| Pin 57 | PG0 — General purpose I/O |
| Pin 58 | PG1 — General purpose I/O |
| Pin 59 | PG2 — General purpose I/O |
| Pin 60 | PG3 — General purpose I/O |
| Pin 61 | PG4 — General purpose I/O |
| Pin 62 | PG5 — General purpose I/O |
| Pin 63 | PG6 — General purpose I/O |
| Pin 64 | PG7 — General purpose I/O |
Typical Applications
STM8S208R8T6 is suitable for 6 applications: Industrial Control Systems, Automotive Body Electronics, Home Appliances, Communication Modules, Motor Control, Sensor Interfacing.
Industrial Control Systems
The STM8S208R8T6 is ideal for industrial control systems due to its robust 8-bit core, rich timer peripherals, and CAN interface. It can handle real-time control tasks such as motor control, sensor interfacing, and communication with PLCs. The 24 MHz clock and 10-bit ADC enable precise analog measurements, while the CAN interface allows seamless integration into industrial networks. Its wide operating voltage range (2.95V to 5.5V) ensures compatibility with industrial power supplies. The device's low-power modes help reduce energy consumption in always-on systems. With 64KB Flash and 6KB RAM, it can store complex control algorithms and data logging. The integrated EEPROM provides non-volatile storage for calibration parameters. Overall, the STM8S208R8T6 offers a cost-effective solution for industrial automation.
Recommended
Automotive Body Electronics
The STM8S208R8T6 is well-suited for automotive body electronics, such as window lifts, seat control, and lighting modules. Its CAN interface enables communication with the vehicle's network, while the 24 MHz core handles control algorithms efficiently. The device operates from 3.3V or 5V, matching automotive power rails. The 10-bit ADC can read sensor inputs like temperature and position. The integrated EEPROM stores configuration data, and the watchdog timer ensures reliable operation in harsh environments. The -40C to +85C temperature range covers automotive requirements. With 64KB Flash, it can accommodate complex firmware. The STM8S208R8T6's robustness and peripheral set make it a preferred choice for cost-sensitive automotive modules.
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Home Appliances
In home appliances like washing machines, refrigerators, and air conditioners, the STM8S208R8T6 provides reliable control with its rich peripheral set. The 24 MHz CPU handles user interface, sensor monitoring, and motor control. The 10-bit ADC reads temperature and pressure sensors, while timers generate PWM for motor drives. The UART and I2C interfaces connect to displays and external EEPROMs. The device's low-power modes help meet energy efficiency standards. With 64KB Flash, it can store multiple operating modes and fault diagnostics. The wide voltage range allows direct connection to 5V logic. The STM8S208R8T6's cost-effectiveness and robustness make it ideal for high-volume consumer appliances.
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Communication Modules
The STM8S208R8T6 can serve as the main controller in communication modules, such as RS-485 converters or CAN gateways. Its dual UARTs enable serial communication with multiple devices, while the CAN interface provides robust networking. The SPI and I2C interfaces allow connection to wireless modules like LoRa or Wi-Fi. The 24 MHz clock ensures sufficient throughput for protocol handling. The device's 64KB Flash can store protocol stacks, and the EEPROM stores configuration. The low-power modes are beneficial for battery-powered modules. The STM8S208R8T6's peripheral richness and low cost make it a practical choice for communication interfaces.
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Motor Control
The STM8S208R8T6 is suitable for motor control applications, including brushless DC (BLDC) and stepper motors. Its multiple 16-bit timers can generate PWM signals with dead-time insertion, essential for H-bridge drivers. The 10-bit ADC samples motor currents and rotor position. The 24 MHz CPU executes control loops like FOC or trapezoidal commutation. The CAN interface allows coordination with other motor controllers in multi-axis systems. The device's robust I/O structure handles high-voltage transients. With 64KB Flash, it can store complex control algorithms. The STM8S208R8T6's performance and peripheral set make it a cost-effective motor control solution.
Recommended
Sensor Interfacing
The STM8S208R8T6 excels in sensor interfacing applications, such as environmental monitoring or industrial sensing. Its 10-bit ADC with 16 channels can read multiple analog sensors, while the I2C and SPI interfaces connect to digital sensors. The UART allows data logging to a PC. The 24 MHz CPU processes sensor data in real-time. The device's low-power modes are ideal for battery-powered sensor nodes. The EEPROM stores calibration data. With 64KB Flash, it can handle complex signal processing. The wide voltage range ensures compatibility with various sensor supplies. The STM8S208R8T6's versatility makes it a popular choice for sensor-based designs.
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Recommended Products Summary
Engineering reference data for STM8S208R8T6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8S208RBT6 | STM8S207R8T6 | STM8S207RBT6 |
|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 64 KB | 128 KB | 64 KB | 128 KB |
| CAN Interface | Yes | Yes | No | No |
| Maximum Frequency | 24 MHz | 24 MHz | 24 MHz | 24 MHz |
| RAM | 6 KB | 6 KB | 6 KB | 6 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit |
Key Differentiators
- Integrated CAN interface (vs STM8S207R8T6)
- 64KB Flash with 24MHz core (vs STM8S207R8T6)
- Pin-compatible with higher-memory variant (vs STM8S208RBT6)
Design Notes
Ensure a stable power supply with proper decoupling. Place a 100nF ceramic capacitor close to each VDD pin and a 4.7uF bulk capacitor near the power input. The VCAP pin requires a 1uF capacitor for internal regulator stability. Operating voltage range is 2.95V to 5.5V; avoid exceeding these limits to prevent damage.
For the 64-LQFP package, use a 0.5mm pitch land pattern. Ensure adequate ground plane for thermal dissipation and signal integrity. Keep high-speed traces short and avoid routing near the oscillator pins. Follow ST's layout guidelines in the datasheet for optimal performance.
Do not leave unused I/O pins floating; configure them as outputs or enable internal pull-ups. The NRST pin has an internal pull-up, but an external capacitor can improve noise immunity. When using the CAN interface, ensure proper termination (120 ohm) and use a transceiver like TJA1050. Also, verify the clock source configuration to avoid unexpected behavior.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive grade, consider STM8S208R8T6 with extended temperature range or other qualified parts.
