STM8S207SBT6C - 24MHz 8-bit MCU 128KB Flash LQFP-44 | STMicroelectronics
MPN: STM8S207SBT6C ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.36 | $436.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.5 | $3,500.00 |
STM8S207SBT6C Overview
An 8-bit MCU (microcontroller unit) is a self-contained computing IC that integrates a CPU core, non-volatile program memory (Flash), read/write data memory (RAM/EEPROM), and configurable peripherals (ADC, timers, communication interfaces) on a single die. Within the broader semiconductor taxonomy, an MCU is a sub-category of microcontroller -> embedded processor -> semiconductor device. The STM8S family uses a Harvard-architecture CISC core designed for deterministic real-time control, balancing low power, high code density, and 5 V tolerance that simplifies interfacing to legacy analog and industrial peripherals.
The STM8S207SBT6C's key specifications include 38 general-purpose I/O lines, a 10-bit successive-approximation ADC with up to 16 channels, a 1 KB true-EEPROM data area plus 6 KB user RAM, two UARTs (including LIN master capability), one SPI peripheral, one CAN 2.0B interface, and a beCAN controller. Integrated reset circuitry, internal 16 MHz RC oscillator, and window watchdog reduce external component count. The part supports up to 30 kV ESD HBM and operates across -40 °C to +85 °C.
Architecturally the STM8S uses a modified Harvard layout, 32-bit program counter with 24-bit linear addressing, and a single-cycle 8x8 multiplier, providing efficient C code generation. The 5 V-tolerant GPIO eliminates level shifters when interfacing to legacy 5 V sensors and drivers, while the integrated CAN controller removes the need for an external transceiver controller. A flexible clock tree with internal 16 MHz HSI reduces external crystal cost for cost-sensitive designs.
Typical applications include industrial sensor conditioning nodes, building automation controllers, smart metering peripherals, automotive body and chassis subsystems, low-end motor control boards, and white-goods user-interface modules. Designers choose this STM8S207 variant when 128 KB Flash headroom is needed for communication stacks (CANopen, Modbus) while staying inside the 5 V-tolerant 8-bit ecosystem.
A critical design consideration is power budgeting: at 24 MHz the core draws roughly 10 mA plus peripheral contributions, so a clean 3.3 V or 5 V LDO rail is recommended. Decouple VDD/VSS pairs with 100 nF X7R ceramic capacitors placed within 3 mm of each pin pair, and reserve a 4.7 uF bulk capacitor on the main rail. The CAN bus requires a 120 ohm termination offset on each end and a common-mode choke for industrial EMC compliance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not consolidated on the manufacturer datasheet or individual supplier listings.
Drop-in alternatives for STM8S207SBT6C — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM8S207SBT6C (same form factor and footprint) — differing in ADC, Data EEPROM, Operating Temperature, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM8S207CBT6
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STM8S207RBT6
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STM8S207S8T6C
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STM8S207KBT6C
✅ Drop-In📋 Reference alternative (not in catalog)
STM8S208S6T6C
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STM8S207MBT6B
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STM8S003K3T6
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View Datasheet →STM8L151C6T3
✅ Drop-In✓ In Stock
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View Datasheet →STM8S207SBT6C Maximum Ratings & Electrical Characteristics
| Core | STM8 8-bit CISC |
| Clock Speed (Max) | 24 MHz |
| Program Memory (Flash) | 128 KB |
| Data EEPROM | 1 KB |
| RAM | 6 KB |
| Supply Voltage | 3.0 V to 5.5 V |
| I/O Pins | 38 |
| ADC | 10-bit, up to 16 channels |
| Timers | 16-bit (multiple), 8-bit |
| UART | 2 (LIN master capable) |
| SPI | 1 |
| I2C | 1 |
| CAN | 1 (CAN 2.0B, beCAN) |
| Operating Temperature | -40 °C to +85 °C |
| Package | LQFP-44 (10x10 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| ESD HBM | Up to 4 kV (typical rating class) |
STM8S207SBT6C Pin Configuration
| Pin 1 | PB0 — GPIO PB0 (TIM3_CH1) |
| Pin 2 | PB1 — GPIO PB1 (TIM3_CH2) |
| Pin 3 | PB2 — GPIO PB2 |
| Pin 4 | PB3 — GPIO PB3 |
| Pin 5 | PB4 — GPIO PB4 (I2C_SCL) |
| Pin 6 | PB5 — GPIO PB5 (I2C_SDA) |
| Pin 7 | PB6 — GPIO PB6 (UART1_TX) |
| Pin 8 | PB7 — GPIO PB7 (UART1_RX) |
| Pin 9 | VSS — Digital ground |
| Pin 10 | VDD — Digital supply 3.0-5.5V |
| Pin 11 | PA0 — GPIO PA0 |
| Pin 12 | PA1 — GPIO PA1 (SWIM) |
| Pin 13 | PA2 — GPIO PA2 (UART1_TX alt) |
| Pin 14 | PA3 — GPIO PA3 (UART1_RX alt) |
| Pin 15 | VSS — Digital ground |
| Pin 16 | VDD — Digital supply 3.0-5.5V |
| Pin 17 | PA4 — GPIO PA4 |
| Pin 18 | PA5 — GPIO PA5 |
| Pin 19 | PA6 — GPIO PA6 |
| Pin 20 | PA7 — GPIO PA7 |
| Pin 21 | PC0 — GPIO PC0 |
| Pin 22 | PC1 — GPIO PC1 |
| Pin 23 | PC2 — GPIO PC2 |
| Pin 24 | PC3 — GPIO PC3 |
| Pin 25 | PC4 — GPIO PC4 |
| Pin 26 | PC5 — GPIO PC5 (SPI_SCK) |
| Pin 27 | PC6 — GPIO PC6 (SPI_MOSI) |
| Pin 28 | PC7 — GPIO PC7 (SPI_MISO) |
| Pin 29 | PD0 — GPIO PD0 (CAN_TX) |
| Pin 30 | PD1 — GPIO PD1 (CAN_RX) |
| Pin 31 | PD2 — GPIO PD2 |
| Pin 32 | PD3 — GPIO PD3 |
| Pin 33 | PD4 — GPIO PD4 (UART2_TX) |
| Pin 34 | PD5 — GPIO PD5 (UART2_RX) |
| Pin 35 | PD6 — GPIO PD6 |
| Pin 36 | PD7 — GPIO PD7 |
| Pin 37 | PE0 — GPIO PE0 |
| Pin 38 | PE1 — GPIO PE1 |
| Pin 39 | VSS — Digital ground |
| Pin 40 | VDD — Digital supply 3.0-5.5V |
| Pin 41 | PE5 — GPIO PE5 |
| Pin 42 | PE6 — GPIO PE6 |
| Pin 43 | PE7 — GPIO PE7 |
| Pin 44 | NRST — External reset (active low) |
Typical Applications
STM8S207SBT6C is suitable for 6 applications: Industrial Sensor Conditioning Nodes, Building Automation Controllers, Smart Metering Peripherals, Automotive Body and Chassis ECUs, Low-End Motor Control Boards, White-Goods User Interface Modules.
Industrial Sensor Conditioning Nodes
The STM8S207SBT6C fits industrial 4-20 mA loop-powered sensor nodes because its 5 V-tolerant I/O interfaces directly to legacy analog front-ends and 24 V industrial rails after regulation. The integrated 10-bit ADC with up to 16 channels handles multiple analog sensor inputs without external multiplexer, while 128 KB Flash accommodates sensor linearization tables and calibration constants. The CAN 2.0B peripheral enables connection to industrial fieldbus networks. Designers benefit from -40 °C to +85 °C operation and 5 V GPIO tolerance that eliminates level shifters. Compared to a 32-bit STM32, the STM8S207SBT6C offers better code density and lower BOM cost for fixed-function sensor nodes. The LQFP-44 package is hand-solderable for prototype runs.
Recommended
Building Automation Controllers
The STM8S207SBT6C is suitable for building automation controllers managing HVAC, access readers, and lighting nodes. Its 24 MHz CPU runs communication stacks like Modbus RTU or BACnet MS/TP while still leaving headroom for control loops. Two UARTs support simultaneous connection to a wired fieldbus and a local HMI display. The 6 KB RAM accommodates Modbus message buffers, and 128 KB Flash allows localized language tables and configuration storage in 1 KB EEPROM. The integrated CAN peripheral provides optional KNX or proprietary backbone connectivity. The 5 V tolerance simplifies interfacing to TRIAC drivers and zero-cross detectors commonly used in AC lighting controls.
Recommended
Smart Metering Peripherals
The STM8S207SBT6C serves as the metering computation engine in smart electricity, gas, and water meters. Its 10-bit ADC with 16 channels reads multiple sensor signals including current shunts and temperature sensors for compensation. The 128 KB Flash stores calibration coefficients and time-of-use tariff schedules, while 1 KB EEPROM retains cumulative register values. The part's 5 V GPIO interfaces directly to metrology AFE chips operating from 5 V supplies. For wireless M-Bus or wM-Bus communication, designers add an external radio module controlled via UART. The -40 °C to +85 °C rating suits outdoor metering enclosures.
Recommended
Automotive Body and Chassis ECUs
The STM8S207SBT6C targets non-safety automotive body electronics such as door modules, seat controllers, mirror adjusters, and lighting ECUs. Its CAN 2.0B peripheral connects to the vehicle CAN bus for body control messaging. The 5 V GPIO drives LED loads and small relays directly via external FETs. The integrated 16-bit timers generate PWM for motor speed control in seat and mirror actuators. The 128 KB Flash fits CANopen or J1939-style protocol layers. Note that this part is not AEC-Q100 qualified; for safety-critical automotive designs, use the STM8AF series or STM32A series instead.
Recommended
Low-End Motor Control Boards
The STM8S207SBT6C is a fit for low-end brushless DC (BLDC) and stepper motor control boards. Its 16-bit advanced timers generate center-aligned PWM with complementary outputs and programmable dead-time insertion for half-bridge drivers. The integrated 10-bit ADC samples back-EMF or current shunt feedback for sensorless commutation. 128 KB Flash stores field-oriented control (FOC) or trapezoidal commutation algorithms with look-up tables. The 5 V GPIO interfaces to 5 V gate drivers such as the L6234. The 44-pin LQFP exposes enough I/O for Hall sensor inputs, fault inputs, and UART debug.
Recommended
White-Goods User Interface Modules
The STM8S207SBT6C drives user-interface modules in washing machines, dishwashers, and ovens where cost-optimized 8-bit performance is sufficient. Its GPIO matrix handles capacitive touch sensing via software routines, drives LED or seven-segment displays, and scans keypads. 6 KB RAM accommodates display buffers and state machines. The 128 KB Flash stores UI strings, fault logs, and cycle programs in EEPROM. Two UARTs support diagnostic serial protocols and external module communication. The 5 V GPIO tolerance simplifies interfacing to legacy LED driver ICs without level translation.
Recommended
Recommended Products Summary
Engineering reference data for STM8S207SBT6C — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8S207CBT6 | STM8S207S8T6C | STM8S208S6T6C |
|---|---|---|---|---|
| Package | LQFP-44 | LQFP-44 | LQFP-44 | LQFP-44 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | STM8 8-bit CISC | STM8 8-bit CISC | STM8 8-bit CISC | STM8 8-bit CISC |
| Clock Speed (Max) | 24 MHz | 24 MHz | 24 MHz | 24 MHz |
| Program Flash | 128 KB | 64 KB | 64 KB | 128 KB |
| RAM | 6 KB | 4 KB | 4 KB | 6 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 2 KB |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| CAN Controller | Yes (bxCAN) | Yes (bxCAN) | Yes (bxCAN) | Yes (bxCAN) |
| I/O Pins | 38 | 38 | 38 | 38 |
Key Differentiators
- Highest-density STM8S207 variant in LQFP-44 (vs STM8S207CBT6)
- Integrated CAN 2.0B controller (vs STM8S105 series (no CAN))
- 5 V-tolerant GPIO without level shifters (vs STM32F0 series (3.3 V GPIO))
- Performance-line peripheral set (vs STM8S003K3T6 (access line))
Design Notes
Power supply decoupling is critical for the STM8S207SBT6C. Place a 100 nF X7R ceramic capacitor within 3 mm of each VDD/VSS pin pair, and add a 4.7 uF to 10 uF bulk capacitor on the main 3.3 V or 5 V rail. For noise-sensitive applications, an additional 10 uF capacitor near VDDA/VSSA pins reduces ADC reference noise. The internal voltage regulator requires minimum 100 nF on VCAP pin (if exposed). According to STMicroelectronics application note, poor decoupling is the leading cause of EMC failures on STM8 designs.
PCB layout should route the SWIM debug signal (PA1) with a short trace and provision a 4-pin header for in-circuit programming. The HSE crystal oscillator traces must be kept short and symmetric, surrounded by a ground guard ring to prevent crosstalk. For CAN bus designs, route CAN_TX/CAN_RX to the transceiver with 50 ohm controlled impedance and add a common-mode choke for industrial EMC compliance. NRST requires an external 10 kohm pull-up and a 100 nF capacitor to ground for proper reset behavior.
Common pitfalls when designing with the STM8S207SBT6C include: (1) exceeding 5.5 V on any I/O pin when VDD is below 5 V - some pins are not 5 V tolerant in all modes; (2) failing to enable the SWIM pin's protective circuit before programming; (3) using the internal HSI at 16 MHz while expecting 24 MHz operation - the HSI must be calibrated or HSE used for full speed; (4) omitting the proper Option Byte configuration for read-out protection during production; (5) driving heavy LED loads directly from GPIO without verifying 20 mA source/sink limit per pin.
Thermal management for the STM8S207SBT6C is straightforward due to the LQFP-44 package's exposed thermal performance. At full 24 MHz operation from 5 V supply, the part draws around 10-15 mA, dissipating roughly 50-75 mW - well within the LQFP-44's thermal envelope. However, in applications where the device is placed near heat sources (motor drivers, power regulators), maintain at least 10 mm clearance. The LQFP-44 does not have an exposed pad, so thermal coupling to the PCB is via the standard lead frame and through the ground pins.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - for safety-critical automotive designs use STM8AF series. Lead-free and halogen-free per STMicroelectronics material declaration.
