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STMicroelectronics STM8S208CBT6TR
- Part No.:
- STM8S208CBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8S208CBT6TR.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,795
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Product details
Overview
STM8S208CBT6TR from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 128 KB Flash, 2 KB data EEPROM, 10-bit ADC with 16 channels, two UARTs (one CAN-capable), SPI, I²C, and integrated CAN 2.0B controller - deployed in automotive body control modules and industrial sensor nodes requiring deterministic real-time response.
For engineers reviewing the STM8S208CBT6TR datasheet, STM8S208CBT6TR pinout, STM8S208CBT6TR application, or STM8S208CBT6TR equivalent, key selection considerations include CAN bus integration, SWIM single-wire debug support, 68 I/O capability in LQFP80, and operation across -40°C to +85°C industrial temperature range.
Technical Context
The STM8S208CBT6TR implements an advanced 3-stage pipelined STM8 core with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQs on six vectors. Its clock system integrates user-trimmable 16 MHz RC, low-power 128 kHz RC, and crystal oscillator with clock security monitoring.
Peripheral subsystems include a beCAN 2.0B controller operating at 1 Mbit/s, dual UARTs (UART1 with LIN 2.1 master/slave and automatic resync, UART3 with synchronous clock output), 10 Mbit/s SPI, 400 kbit/s I²C, and three 16-bit timers (TIM1 advanced control timer with dead-time insertion and complementary outputs, TIM2/TIM3 general-purpose) plus 8-bit basic timer and dual watchdogs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline; enables deterministic 20 MIPS @ 24 MHz without wait states below 16 MHz. |
| Flash Memory | 128 KB program Flash with 20-year data retention at 55 °C after 10k write/erase cycles; supports in-application programming (IAP). |
| Data EEPROM | 2 KB true data EEPROM with 300k endurance cycles; retains calibration data or configuration parameters across power cycles. |
| CPU Frequency | Up to 24 MHz fCPU; operates at full speed with zero wait states up to 16 MHz, reducing timing jitter in real-time control loops. |
| ADC Resolution | 10-bit SAR ADC with up to 16 input channels and internal reference; achieves ±1 LSB INL/DNL for precision sensor signal acquisition. |
| CAN Interface | beCAN 2.0B compliant controller with 1 Mbit/s bit rate; supports message filtering, FIFO buffering, and error handling for automotive network robustness. |
| I/O Count | 68 I/O pins in LQFP80 package, including 18 high-sink outputs (up to 50 mA per pin); suitable for direct LED driving or relay interface without external buffers. |
| Supply Voltage | 2.95 V to 5.5 V operating range; enables direct connection to 3.3 V or 5 V system rails without level-shifting circuitry. |
Pinout & Package
LQFP80 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per datasheet layout guidelines. |
| NRST | Active-low reset input | Asynchronous reset with built-in Schmitt trigger; supports external pull-up and debouncing for reliable power-on initialization. |
| SWIM | Single Wire Interface Module | Bi-directional debug interface using one pin; enables flash programming, breakpoint debugging, and memory inspection without JTAG overhead. |
| PA0–PA7, PB0–PB7, etc. | General-purpose I/O ports | 68 total I/Os with configurable pull-ups/downs, alternate functions (UART, SPI, CAN, timers), and current-sinking capability up to 50 mA. |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface pins; require external CAN PHY (e.g., TJA1042) for physical layer compliance. |
| PC3/PC4 | UART1 TX/RX | Primary asynchronous serial interface with LIN 2.1 support; enables master-mode wake-up and slave-mode auto-resynchronization. |
Key Features
| Feature | Design Value |
|---|---|
| SWIM Debug Interface | Single-pin in-circuit debugging and programming; eliminates need for dedicated debug headers and reduces PCB footprint. |
| beCAN 2.0B Controller | Fully integrated CAN protocol engine with 16 message objects, programmable bit timing, and hardware message filtering - reduces MCU load in vehicle networks. |
| Low-Power Modes | Wait, active-halt, and halt modes with individual peripheral clock gating; achieves <1 μA halt current at 3.3 V for battery-powered sensor nodes. |
| High-Sink I/O Pins | 18 pins rated for 50 mA sink current; drive LEDs, small relays, or MOSFET gates directly without external drivers. |
| 96-bit Unique ID | Factory-programmed read-only identifier; enables secure device authentication and firmware binding in fleet management systems. |
| Internal Clock Sources | Trimmed 16 MHz RC (±1% accuracy), 128 kHz low-power RC, and crystal oscillator options; eliminates need for external crystals in cost-sensitive designs. |
Applications
| Automotive Body Control Unit (BCU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in 12 V vehicle platforms. IC Role / Device Role / Timing Role: Main system controller executing CAN-based command arbitration, PWM motor control, and LIN slave communication with sensors. Use Value: Integrated beCAN and high-sink I/Os reduce BOM count by eliminating discrete CAN transceivers and driver ICs. |
Use Scenario: Local intelligence for brushless DC (BLDC) motor commutation feedback and protection logic in HVAC blowers or pump controllers. IC Role / Device Role / Timing Role: Real-time execution of Hall-effect sensor decoding, 6-step commutation sequencing, and overcurrent shutdown via TIM1 advanced timer. Use Value: TIM1's complementary outputs with programmable dead-time prevent shoot-through in half-bridge gate drivers. |
| Smart Energy Metering Node | Building Automation Sensor Hub |
Use Scenario: Sub-metering unit aggregating current/voltage readings from shunt-based sensing and reporting via RS-485 or wireless gateway. IC Role / Device Role / Timing Role: ADC acquisition engine with DMA-triggered sampling, UART-based Modbus RTU communication, and EEPROM-stored calibration coefficients. Use Value: 10-bit ADC with 16-channel multiplexing and 2 KB EEPROM enable accurate, field-adjustable metering without external storage. |
Use Scenario: Multi-sensor aggregator for temperature, humidity, CO₂, and occupancy in commercial HVAC zones. IC Role / Device Role / Timing Role: I²C master polling multiple slave sensors, UART logging to local SD card or cloud gateway, and low-power wake-up timer scheduling periodic reads. Use Value: Multiple synchronous (I²C) and asynchronous (UART) interfaces allow concurrent sensor data collection and telemetry transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8S207R8T6 | Same core, 64-pin LQFP, 64 KB Flash, no CAN interface; identical clock/peripheral architecture except missing beCAN block. | Suitable for non-CAN applications like appliance control or simple HMI where cost and pin count are prioritized over networking. | Select when CAN is unnecessary and board space constraints favor smaller LQFP64 package. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 48 MHz, 32 KB Flash, USB 2.0, no CAN; includes hardware CRC and SysTick but lacks EEPROM and SWIM simplicity. | Better suited for USB-connected devices or applications needing higher computational throughput than 8-bit can deliver. | Choose when migrating toward 32-bit ecosystem, requiring USB device functionality, or needing larger code space with modern toolchain support. |
Compared with STM8S207R8T6, the STM8S208CBT6TR adds essential CAN 2.0B for distributed vehicle networks; versus STM32F042F6P6, it trades USB and 32-bit performance for lower power, simpler debug (SWIM), and embedded EEPROM - making it optimal for cost-sensitive, CAN-dependent industrial edge nodes.
Availability
STM8S208CBT6TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, smart metering, and building automation systems requiring stable component supply and long-term industrial temperature support.
Supply support for STM8S208CBT6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM8S series targets cost-sensitive, resource-constrained embedded applications demanding high reliability, low power, and simple development - especially in automotive body electronics and industrial control where CAN integration and robust I/O are critical.
FAQ
What debug interface does STM8S208CBT6TR support?
The STM8S208CBT6TR uses the Single Wire Interface Module (SWIM), a proprietary ST debug protocol requiring only one bidirectional pin. It supports full flash programming, real-time variable inspection, and breakpoint debugging without additional hardware - unlike JTAG/SWD used in ARM-based MCUs. SWIM operates at up to 4 MHz and is compatible with ST-LINK/V2 and compatible programmers.
Does STM8S208CBT6TR include a hardware CAN controller?
Yes, the STM8S208CBT6TR integrates a fully compliant beCAN 2.0B controller supporting both standard and extended frames, 1 Mbit/s bit rate, 16 message objects, and hardware filtering. It requires an external CAN transceiver (e.g., TJA1042 or SN65HVD230) for physical layer signaling but handles all protocol-level tasks including arbitration, error detection, and retransmission automatically.
What is the maximum number of I/O pins available on this device?
The STM8S208CBT6TR in LQFP80 package provides up to 68 I/O pins, including 18 high-sink outputs capable of sinking up to 50 mA each. All I/Os support alternate functions such as UART, SPI, I²C, CAN, and timer capture/compare signals. Pin remapping is supported via software configuration registers to optimize PCB routing.
How is the internal 16 MHz RC oscillator calibrated?
The internal 16 MHz RC oscillator is factory-trimmed and stored in option bytes; users can perform fine-tuning via the CLK_HSICALR register during runtime. Calibration adjusts the oscillator frequency within ±1% tolerance across voltage and temperature ranges, enabling reliable clocking without external crystal - critical for cost-sensitive applications where crystal placement and layout complexity must be minimized.
STM8S208CBT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM8S
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1.5K x 8
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.95V ~ 5.5V
- Data Converters:
- A/D 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S208CBT6TR FAQ
1.How can I place an order for STM8S208CBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S208CBT6TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM8S208CBT6TR reliable?
The price and inventory of STM8S208CBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S208CBT6TR is usually 5 days.
3.What payment methods are accepted for STM8S208CBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S208CBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S208CBT6TR?
STM8S208CBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S208CBT6TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM8S208CBT6TR?
For technical support, including STM8S208CBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S208CBT6TR requirements.
6.How does Aetrix verify that STM8S208CBT6TR is sourced from the original manufacturer or authorized distributors?
All STM8S208CBT6TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM8S208CBT6TR meets industry standards.
7.What is the process for return or replacement of STM8S208CBT6TR?
All STM8S208CBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM8S208CBT6TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM8S208CBT6TR part is unused and in its original packaging.
Return procedure for STM8S208CBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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