STM8S903F3M6 - 16MHz 8KB 8-Bit MCU | STMicroelectronics
N.º da peça: STM8S903F3M6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.993 | $1,99 |
| 10 | $1.993 | $19,93 |
| 100 | $1.993 | $199,30 |
| 500 | $1.993 | $996,50 |
| 1.000 | $1.993 | $1.993,00 |
STM8S903F3M6 Visão geral
What is an 8-bit microcontroller? An MCU is a semiconductor device that combines a processor core, program memory, data memory, and peripherals on one integrated circuit. The STM8S903F3M6 belongs to the 8-bit MCU -> embedded microcontroller -> semiconductor hierarchy and is intended for compact control, measurement, and communication systems where a dedicated processor, memory, and serial interfaces are required.
Verified specifications identify 8 KB of Flash memory, 1 KB of RAM, 640 bytes of EEPROM, a 10-bit ADC, two timers, UART, SPI, and I²C. These peripherals make the device suitable for sensor acquisition, actuator control, industrial instrumentation, and low-cost embedded products. The 16 MHz clock provides the processing headroom needed for basic control loops and serial data handling, although the verified data does not specify the complete peripheral timing or ADC accuracy.
The STM8S903F3M6 uses a 20-SOIC package, also described as a 0.295-inch, 7.50 mm-width SOP package in the verified distributor data. The SOIC outline is a surface-mount package with gull-wing leads, making it suitable for conventional PCB assembly and prototype-to-production transfer. The package pinout and exposed thermal-pad details are not included in the supplied verified data, so the pinout is reported as null rather than inferred.
Typical applications include compact industrial controllers, low-power sensor nodes, simple motor or relay-control boards, data-acquisition modules, UART-to-digital bridges, and small SPI or I²C peripheral boards. The STM8 family can be paired with external sensors and communication transceivers, while the integrated ADC supports analog measurement. Final firmware support should be confirmed with the applicable STMicroelectronics development tools and device documentation.
For PCB design, preserve the manufacturer's recommended decoupling and grounding layout, and verify all peripheral pins, reset behavior, clock requirements, and package dimensions against the official datasheet before production. This page combines verified distributor specifications, package data, sourcing information, and engineering-oriented application guidance without treating unverified details as guaranteed specifications.
Alternativas drop-in para STM8S903F3M6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM8S903F3M6 (mesmo formato e footprint) — diferindo em Flash Memory, Product Type, Series.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32L083CBT6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32F103T8U7
✅ Drop-In✓ Em estoque
$8.7297 / unidade
Ver ficha técnica →ST7FLITES2Y0M6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM8S903F3M6 Classificações máximas e características elétricas
| Product Type | 8-bit microcontroller |
| Series | STM8S |
| Maximum Clock Speed | 16 MHz |
| Flash Memory | 8 KB (8K x 8) |
| RAM | 1 KB |
| EEPROM | 640 bytes |
| Supply Voltage Range | 2.95 V to 5.5 V |
| I/O Ports | 16 |
| ADC Resolution | 10 bits |
| Timer Count | 2 timers |
| Serial Interfaces | UART, SPI, I²C |
| Package Type | 20-SOIC / 20-SO |
| Package Width | 7.50 mm |
| Package Length | 0.295 inch |
| Tipo de montagem | Surface mount |
| Status RoHS | RoHS compliant |
| Lifecycle Stage | Active |
| Power-on Reset | Permanently available |
| Power-down Reset | Permanently available |
Guia de Configuração de Pinos do STM8S903F3M6 0.295 inch
Configuração de pinos para STM8S903F3M6 (pacote 0.295 inch). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para STM8S903F3M6.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
STM8S903F3M6 é adequado para 6 aplicaçãos: Compact Industrial Control Module, Low-Power Sensor Node, UART-to-Digital Bridge, Simple Data-Acquisition Board, Small Motor or Relay Controller, SPI or I²C Peripheral Interface.
Compact Industrial Control Module
The STM8S903F3M6 fits compact industrial control modules because its verified 16 MHz clock, 16 I/O ports, two timers, and 2.95 V to 5.5 V supply range support basic sequencing and discrete I/O handling. A controller can use the GPIO and timers for relays, indicators, interlocks, and actuator timing, while the integrated UART, SPI, or I²C interfaces connect to sensors or downstream modules. The 20-SOIC package also supports conventional surface-mount PCB assembly. Designers should verify exact pin multiplexing, electrical limits, and timing from the official datasheet.
Recomendado
Low-Power Sensor Node
The STM8S903F3M6 is suitable for compact sensor nodes that need local acquisition and serial reporting. Its verified 10-bit ADC can digitize analog sensor outputs, while 8 KB Flash and 1 KB RAM provide space for acquisition logic and control firmware. The 640-byte EEPROM is useful for retaining calibration or configuration data, subject to the device’s specified endurance and operating conditions. UART, SPI, or I²C can connect to environmental, inertial, or external measurement components. Detailed sleep-current and wake-time data must be checked before sizing a battery.
Recomendado
UART-to-Digital Bridge
STM8S903F3M6 works well in a UART-to-digital bridge because the verified feature set includes 16 MHz processing, 16 I/O ports, and UART communication alongside SPI and I²C. Firmware can receive configuration commands, update GPIO states, and report measurements through the same serial link. Its 8 KB Flash and 1 KB RAM are appropriate for a focused bridge rather than a large application stack. The 20-SOIC outline is useful for small interface boards, although the designer must confirm pin availability, logic levels, and UART electrical specifications before layout release.
Recomendado
Simple Data-Acquisition Board
The STM8S903F3M6 can serve as the control center of a small data-acquisition board because the verified specifications include a 10-bit ADC, 16 I/O ports, and three serial interface families. Analog channels can be sampled and transferred through UART, SPI, or I²C to a host computer, display, or storage controller. The 2.95 V to 5.5 V operating range supports integration with common embedded supply rails, while the 20-SOIC package simplifies routing on a compact board. ADC accuracy, sampling behavior, reference configuration, and absolute limits are not supplied and require datasheet verification.
Recomendado
Small Motor or Relay Controller
The STM8S903F3M6 can control small motors, relays, or mixed electromechanical loads when the design includes suitable driver circuitry and protection. Its two verified timers support timing-oriented control functions, and the 16 I/O ports provide digital connections to sensors, status LEDs, and driver inputs. The microcontroller is the logic controller rather than the power stage; MOSFETs, transistors, flyback protection, and current-rated power paths remain necessary. The 20-SOIC package is easy to assemble, but pin functions and electrical limits must be confirmed before assigning load-control signals.
Recomendado
SPI or I²C Peripheral Interface
The STM8S903F3M6 is appropriate for small peripheral-interface boards because verified specifications list both SPI and I²C in addition to UART and a 10-bit ADC. Firmware can periodically read sensors, drive displays, manage actuators, and expose diagnostics through multiple serial interfaces. The 8 KB Flash and 1 KB RAM are sufficient for compact protocol handlers, but application-specific buffering and timing must be evaluated against the MCU’s verified memory and peripheral limits. Because the supplied data does not include a complete pinout, assign interface pins only after consulting the official device documentation.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM8S903F3M6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32L083CBT6 | STM32F103T8U7 | ST7FLITES2Y0M6 |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 20-SOIC / 20-SO | 20-SOIC | 20-SOIC | 20-SOIC |
| Product Family | STM8S | STM32L0 | STM32F1 | ST7FLITES |
Principais diferenciais
- 8 KB Flash versus the 1 KB Flash listed for ST7FLITES2Y0M6 (vs ST7FLITES2Y0M6)
- 16 MHz maximum clock with 10-bit ADC and three serial-interface families (vs STM32L083CBT6)
- Compact 20-SOIC package with 16 I/O ports (vs STM32F103T8U7)
Notas de projeto
The verified supply range is 2.95 V to 5.5 V. Place the local input-decoupling network close to the device power pins, follow the official reference layout, and ensure the regulator has adequate transient capability for the board’s ADC, serial interfaces, and attached peripherals. Do not infer absolute maximum limits, regulator sequencing, or I/O voltage thresholds from the distributor summary alone.
Use the manufacturer’s 20-SOIC footprint and pin numbering rather than assigning signals from package name conventions alone. Keep analog inputs away from fast switching or serial return paths, provide a clean ground reference, and route sensitive ADC traces with short paths. The supplied data confirms a 20-SOIC package but does not provide the complete pinout, so every signal assignment requires datasheet cross-checking.
Do not treat the 8 KB Flash, 1 KB RAM, and 640-byte EEPROM specifications as interchangeable capacities. Firmware should be size-checked including boot code, interrupt handlers, libraries, and application state. Also verify timer, UART, SPI, I²C, and ADC resource assignments before PCB routing because the supplied data does not expose the complete peripheral mapping.
If the board uses the MCU’s ADC, route the analog source with minimal loop area, provide a defined reference arrangement, and keep digital clocks and communication lines separated from the measurement node. If UART, SPI, or I²C lines leave the board, use the intended signal levels and external protection devices. The application benefits from the MCU’s integrated interfaces, but interface integrity still depends on board-level implementation.
Informações de conformidade
RoHS compliance is stated in the verified ChipDig result. The supplied data does not verify REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status.
