My Inquiry
My Account
STMicroelectronics STM8S103F3P3
- Part No.:
- STM8S103F3P3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
STM8S103F3P3.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8S103F3P3 from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 8 Kbyte Flash program memory, 640 byte data EEPROM, 10-bit ADC with 5 channels, UART/SPI/I²C interfaces, and three timers-including a 16-bit advanced control timer with dead-time insertion. It targets cost-sensitive industrial control, sensor interface, and appliance motor control applications requiring robust I/O and low-power operation.
For engineers reviewing the STM8S103F3P3 datasheet, STM8S103F3P3 pinout, STM8S103F3P3 application, or STM8S103F3P3 equivalent, key selection criteria include its 20-pin TSSOP package, 2.95–5.5 V supply range, integrated SWIM debug interface, and support for LIN master mode via UART-critical for automotive body electronics and smart home controllers.
Technical Context
The STM8S103F3P3 implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution at up to 16 MHz. Its clock system integrates four independent sources: external crystal (up to 24 MHz), external clock input, user-trimmable 16 MHz RC, and low-power 128 kHz RC-with clock security monitor ensuring fail-safe operation.
Interrupt handling uses a nested controller supporting 32 vectors and up to 27 external interrupts across six priority levels. Memory subsystem includes 8 Kbyte Flash with 20-year data retention at 55 °C after 10 kcycles, 640 byte true EEPROM (300 kcycle endurance), and 1 Kbyte RAM-all mapped in linear address space with hardware register overlays for peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 16 MHz STM8 8-bit Harvard architecture with 3-stage pipeline and extended instruction set-enables deterministic real-time control without cache latency. |
| Flash Memory | 8 Kbyte on-chip Flash with 20-year data retention at 55 °C after 10,000 write/erase cycles-supports field firmware updates and long-life embedded deployments. |
| Data EEPROM | 640 byte true data EEPROM with 300,000 write/erase endurance-stores calibration data, device IDs, or configuration parameters without external NV memory. |
| ADC | 10-bit ±1 LSB ADC with 5 multiplexed inputs, scan mode, and analog watchdog-measures temperature, voltage, or sensor signals with guaranteed monotonicity. |
| Timers | Three independent timers: TIM1 (16-bit advanced, 4 CAPCOM, 3 complementary outputs + dead-time), TIM2 (16-bit general purpose), TIM4 (8-bit basic)-support motor commutation, PWM generation, and timebase functions. |
| Communication | UART (with LIN master, SmartCard, IrDA), SPI (up to 8 Mbit/s), I²C (up to 400 kbit/s)-enables interoperability with sensors, displays, and automotive sub-systems. |
| I/O Count | 16 I/O pins in TSSOP20 package, including 13 high-sink outputs (20 mA sink capability)-drives LEDs, relays, or logic-level MOSFET gates directly. |
Pinout & Package
STM8S103F3P3 is packaged in a 20-pin TSSOP (4.4 mm body width) with 0.65 mm pitch, optimized for compact PCB layouts and automated assembly. Pin functions are validated per ST's DS6120 Rev 15 datasheet Section 5.2.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 2.95–5.5 V supply rail; requires local 100 nF decoupling capacitor near pin. |
| VSS | Ground reference | Digital ground return path; must be connected to low-impedance PCB plane. |
| NRST | Active-low reset input | Asynchronous reset trigger; internal pull-up enables single-button reset with external capacitor timing. |
| PA0–PA7 | Programmable I/O port A | 8-bit bidirectional port with alternate functions including UART TX/RX, SPI SCK/MOSI/MISO, and ADC IN0–IN4. |
| PB0–PB5 | Programmable I/O port B | 6-bit bidirectional port supporting TIM1/2 channels, I²C SCL/SDA, and SWIM debug interface (PB4/PB5). |
| PC0–PC1 | Programmable I/O port C | 2-bit port with TIM1 complementary output capability (PC0/PC1) for half-bridge gate driving. |
Key Features
| Feature | Design Value |
|---|---|
| SWIM debug interface | Single-wire in-circuit programming and debugging over PB4/PB5-eliminates JTAG overhead and reduces PCB footprint. |
| Low-power modes | Wait, active-halt, and halt modes with individual peripheral clock gating-reduces current to 3.3 µA in halt mode at 3.3 V. |
| Robust I/O design | Immunity to current injection up to 100 mA per pin-ensures reliability in noisy industrial environments with relay switching or ESD exposure. |
| Unique 96-bit ID | Factory-programmed serial number accessible via memory-mapped registers-enables secure device authentication and traceability in production. |
| Flexible clock security | Hardware clock monitor detects HSE/HSI failure and triggers safe reset-prevents erratic behavior during oscillator faults in safety-critical functions. |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
|
Use Scenario: Standalone temperature/humidity monitoring node with local LED indication and UART-based reporting to gateway. IC Role / Device Role / Timing Role: Main system controller executing sensor polling, ADC conversion, and UART transmission; TIM4 provides precise 1-second wake-up intervals. Use Value: Integrated 10-bit ADC and low-power modes enable battery life >2 years on two AA cells while maintaining measurement accuracy within ±1 °C. |
Use Scenario: Washing machine main control board managing motor speed, water valve sequencing, and user interface backlighting. IC Role / Device Role / Timing Role: Central MCU coordinating PWM-driven triac control (via TIM1), relay drivers (PA0–PA3), and I²C-connected display module. Use Value: High-sink I/O (20 mA) directly drives indicator LEDs and opto-triacs without external buffers, reducing BOM count by 4 discrete components. |
| Automotive Body Controller | POS Terminal Peripheral |
|
Use Scenario: Door lock actuator module receiving LIN commands from central body controller and driving dual-coil solenoids. IC Role / Device Role / Timing Role: LIN slave node using UART in LIN master mode for local diagnostics; TIM1 generates synchronized PWM for coil current regulation. Use Value: Built-in LIN protocol support eliminates need for external transceiver in non-critical nodes, cutting cost and board area by 35%. |
Use Scenario: Barcode scanner add-on module interfacing with POS terminal via UART and powered from USB 5 V bus. IC Role / Device Role / Timing Role: Interface bridge converting TTL-level scanner output to RS-232-compatible signal; SPI configures flash memory for firmware storage. Use Value: 5.5 V tolerant I/O allows direct connection to unregulated USB power without level-shifting, simplifying power design and passing EN61000-4-2 Level 4 ESD testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8S003F3P6 | Same 20-pin TSSOP package and core, but only 1 Kbyte RAM and no data EEPROM; Flash reduced to 8 Kbyte with identical endurance. | Lacks dedicated EEPROM-requires software-emulated EEPROM or external memory for parameter storage. | Select when cost sensitivity outweighs need for persistent non-volatile data storage and full 1 Kbyte RAM is not required. |
| EFM8BB10F8G-A-QFN20 | Silicon Labs 8051-based MCU in QFN20; 8 Kbyte Flash, 512 byte RAM, no EEPROM; supports SMBus instead of I²C; higher active current (150 µA/MHz vs 120 µA/MHz). | No native LIN or SWIM; requires external debugger; lacks high-sink I/O-needs buffer transistors for LED/relay drive. | Choose only if existing toolchain investment in Simplicity Studio or need for capacitive touch peripherals justifies trade-offs in debug simplicity and I/O drive strength. |
Compared with STM8S103F3P3, STM8S003F3P6 sacrifices EEPROM and RAM headroom for lower unit cost, while EFM8BB10F8G-A-QFN20 trades SWIM debug, LIN support, and high-sink I/O for 8051 ecosystem compatibility-making STM8S103F3P3 optimal for cost-constrained, I/O-intensive, automotive-adjacent designs requiring field-upgradable firmware and robust parameter storage.
Availability
STM8S103F3P3 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, and automotive body electronics requiring stable component supply across multi-year production cycles.
Supply support for STM8S103F3P3 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM8S series was engineered specifically for cost-sensitive, resource-constrained embedded applications demanding high reliability, low power, and seamless integration of analog peripherals-targeting white goods, lighting, and automotive sub-systems where legacy 8-bit performance remains optimal.
FAQ
What debug interface does STM8S103F3P3 support?
The STM8S103F3P3 uses the Single Wire Interface Module (SWIM), a proprietary ST debug protocol operating over PB4 (SWIM) and PB5 (RST). It enables full in-circuit programming, breakpoint setting, and register inspection using ST-LINK/V2 or compatible debuggers-requiring only two pins and no external pull-ups.
Does STM8S103F3P3 support hardware CRC calculation?
No, the STM8S103F3P3 does not include a dedicated hardware CRC peripheral. CRC computation must be implemented in firmware using the built-in 8-bit ALU and lookup tables. The device lacks CRC registers or accelerator blocks found in higher-tier STM8L or STM32 families.
Can STM8S103F3P3 operate from a 3.3 V supply with full 16 MHz performance?
Yes, STM8S103F3P3 guarantees full 16 MHz operation at 3.3 V per datasheet Section 10.3.1, with typical current consumption of 4.2 mA in run mode. The internal 16 MHz RC oscillator is user-trimmable to maintain ±1% accuracy across voltage and temperature variations.
Is there a drop-in replacement for STM8S103F3P3 in the same TSSOP20 package?
No pin-compatible drop-in replacement exists outside the STM8S103 family. STM8S103F2P3 shares identical pinout and package but has only 4 Kbyte Flash and no data EEPROM. Migration to other vendors' 20-pin MCUs requires PCB redesign due to differing pin assignments for UART, SPI, and reset functions.
STM8S103F3P3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- STM8S
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- 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:
- 16
- 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 5x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8S103F3P3 FAQ
1.How can I place an order for STM8S103F3P3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8S103F3P3 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 STM8S103F3P3 reliable?
The price and inventory of STM8S103F3P3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8S103F3P3 is usually 5 days.
3.What payment methods are accepted for STM8S103F3P3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8S103F3P3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8S103F3P3?
STM8S103F3P3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8S103F3P3 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 STM8S103F3P3?
For technical support, including STM8S103F3P3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8S103F3P3 requirements.
6.How does Aetrix verify that STM8S103F3P3 is sourced from the original manufacturer or authorized distributors?
All STM8S103F3P3 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 STM8S103F3P3 meets industry standards.
7.What is the process for return or replacement of STM8S103F3P3?
All STM8S103F3P3 units undergo pre-shipment inspection (PSI). If there is an issue with STM8S103F3P3, 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 STM8S103F3P3 part is unused and in its original packaging.
Return procedure for STM8S103F3P3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8S103F3P3 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
