PIC18F4331-I/P - 8-Bit 40MHz 8KB Flash MCU | Microchip
N.º da peça: PIC18F4331-I/P ✓ AtivoPIC18F4331-I/P Visão geral
A microcontroller is a programmable semiconductor that integrates a processor core, memory, input/output ports, timers, and peripherals into one device. The PIC18F4331 belongs to the PIC18 family of 8-bit RISC microcontrollers and provides a hardware platform for sensing, motor control, industrial control, instrumentation, and embedded control systems. Its integrated analog and timing resources reduce the number of external components required in a typical design.
Key features include 40 MHz operation, 8 KB of enhanced Flash program memory, 768 bytes of RAM, 34 I/O ports, and a 10-bit ADC. The industrial temperature designation supports operation from -40°C to +85°C, while the specified supply range is 4.2 V to 5.5 V. These characteristics make the device suitable for control boards requiring deterministic timing, mixed analog and digital functions, and a through-hole package that remains convenient for prototypes and manually assembled systems.
The enhanced Flash architecture supports in-circuit programming and helps simplify firmware development and field updates. Integrated high-performance PWM, ADC, and communication resources allow the MCU to control power conversion, capture analog inputs, and exchange data with sensors or other controllers. Exact peripheral channel counts and electrical limits should be confirmed against the pin-description and electrical-characteristics tables in the Microchip manufacturer datasheet before a production design is released.
Typical applications include industrial motor controllers, digital power supplies, instrumentation systems, data acquisition modules, LED lighting controllers, and compact embedded control products. The 40-pin DIP package also makes the PIC18F4331-I/P practical for educational platforms, proof-of-concept boards, and industrial control products assembled with socketed or through-hole components.
Designers should confirm the 4.2 V to 5.5 V operating range, external decoupling requirements, programming connections, oscillator configuration, and every peripheral's pin assignment in the manufacturer datasheet. Because the MCU combines analog sensing and PWM generation, unused pins should be configured appropriately and sensitive analog traces should be kept away from high-current switching paths.
This page consolidates device specifications, programming guidance, application fit, package information, and verified sourcing resources. It also distinguishes exact ordering information from related family members, helping engineers identify the correct 40-pin industrial-temperature device before beginning schematic capture, PCB layout, firmware development, or volume procurement.
Alternativas drop-in para PIC18F4331-I/P — 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 PIC18F4331-I/P (mesmo formato e footprint) — diferindo em Package, Program Memory.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasPIC18F4331-I/P Classificações máximas e características elétricas
| Device Type | 8-bit PIC18 Flash Microcontroller |
| Frequência máxima de clock | 40 MHz |
| Program Memory | 8 KB (4K x 16 bits) |
| Program Memory Type | Enhanced Flash |
| RAM | 768 bytes |
| Analog-to-Digital Converter Resolution | 10-bit |
| I/O Port Count | 34 ports |
| Operating Supply Voltage Range | 4.2 V to 5.5 V |
| Faixa de temperatura de operação | -40°C to +85°C |
| Encapsulamento | 40-pin plastic DIP (40-PDIP) |
| Package Pin Count | 40 pins |
| Tipo de montagem | Through-hole |
| Architecture | 8-bit |
| PWM Capability | High-performance PWM |
| Programming Interface | In-circuit programming supported |
| Status do ciclo de vida | Active |
Guia de Configuração de Pinos do PIC18F4331-I/P 40 pins
Configuração de pinos para PIC18F4331-I/P (pacote 40 pins). 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 PIC18F4331-I/P.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PIC18F4331-I/P é adequado para 6 aplicaçãos: Industrial Motor Controller, Digital Power Supply Controller, Industrial Instrumentation, Data Acquisition Module, LED Lighting Controller, Educational Control Board.
Industrial Motor Controller
The PIC18F4331-I/P fits compact motor-control boards that require fast timing, direct digital control, and analog feedback. Its 40 MHz 8-bit core supports responsive control-loop calculations, while the high-performance PWM resources can drive switching stages, relays, or motor-drive circuitry. The 10-bit ADC provides a practical sensing path for current, temperature, or position feedback, and 34 I/O ports leave ample connections for sensors, switches, and status indicators. The -40°C to +85°C industrial specification suits factory equipment, but the 4.2 V to 5.5 V supply must be maintained. Verify the assigned PWM and ADC channels against the 40-pin pinout before routing sensitive feedback signals.
Recomendado
Digital Power Supply Controller
The PIC18F4331-I/P is suitable for supervisory and closed-loop digital power-control designs where a fast 8-bit controller can manage PWM commands, fault flags, and analog measurements. Its 40 MHz operating frequency supports responsive duty-cycle updates, while the 10-bit ADC can monitor feedback signals after suitable conditioning. The 768 bytes of RAM provides working space for control variables, and 34 I/O ports can connect switches, gate drivers, and status logic. Designers should account for the 4.2 V to 5.5 V operating range and keep high-current switching paths separated from analog traces. The data-sheet PWM, comparator, and ADC assignments determine the practical implementation, so those functions should be confirmed before schematic completion.
Recomendado
Industrial Instrumentation
The PIC18F4331-I/P can form the control core of a compact industrial measurement instrument combining sensor conditioning, digital filtering, local display control, and communications. Its 10-bit ADC is suitable for many process-monitoring signals, while the 40 MHz CPU provides headroom for sampling tasks and control algorithms. The 8 KB enhanced Flash program memory stores application code and calibration constants, and 768 bytes of RAM supports working buffers. Its 34 I/O ports simplify discrete panel connections, and the -40°C to +85°C specification supports industrial environments. Accuracy beyond the ADC's 10-bit resolution depends on the analog front end, reference design, grounding, and calibration method. Confirm channel availability and package assignments in the manufacturer data sheet.
Recomendado
Data Acquisition Module
The PIC18F4331-I/P is appropriate for a compact data-acquisition front end that must sample analog inputs and transfer results through a digital interface. The 10-bit ADC handles moderate-resolution process or sensor measurements, while the 40 MHz 8-bit core supports acquisition sequencing, scaling, and basic filtering. Eight kilobytes of enhanced Flash accommodates firmware and calibration tables, and 768 bytes of RAM is suitable for short sample buffers. Thirty-four I/O ports can be assigned to sensor enables, communication signals, and status controls. For best results, place the MCU and analog input circuitry on a controlled ground plane and isolate switching nodes. Validate the actual ADC channel count and peripheral multiplexing in the 40-pin data-sheet tables before finalizing the interface PCB.
Recomendado
LED Lighting Controller
The PIC18F4331-I/P can implement programmable LED dimming, sequencing, and protection control because it combines high-performance PWM resources with 34 I/O ports and a 10-bit ADC. A 40 MHz control core permits smooth duty-cycle updates and coordinated effects across multiple lighting channels, while ADC inputs can monitor current or temperature feedback when the board includes suitable sensing circuitry. Its 8 KB of enhanced Flash provides room for lighting patterns and configuration data. The industrial -40°C to +85°C range supports controlled indoor or industrial fixtures, although the 4.2 V to 5.5 V supply and thermal design of the LED power stage remain important. Confirm the PWM outputs, timer connections, and unused-pin states in the manufacturer data sheet before layout signoff.
Recomendado
Educational Control Board
The 40-pin through-hole PIC18F4331-I/P package is convenient for educational, prototype, and manually assembled control boards. Its socket-compatible DIP construction makes it easy to replace and provides accessible connections for motors, LEDs, switches, sensors, and logic experiments. The 40 MHz processor introduces enough timing capability for meaningful control, communications, and analog-measurement exercises, while the 10-bit ADC introduces real mixed-signal design practice. The 8 KB Flash and 768 bytes of RAM also provide a manageable learning platform for Microchip's PIC18 toolchain. Students should follow the programming and clocking guidance in the manufacturer data sheet and confirm the 4.2 V to 5.5 V supply requirement before connecting laboratory peripherals.
Recomendado
Dados de referência de engenharia para PIC18F4331-I/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Notas de projeto
Design the supply rail to remain between 4.2 V and 5.5 V under all operating conditions. Place the manufacturer-recommended bypass capacitors close to the device's power pins and provide a stable return path to the analog ground reference. Because the MCU shares its supply with external sensors and logic, calculate the worst-case rail droop during startup and I/O transitions rather than relying on the nominal 5 V level alone.
Assign oscillator, programming, reset, ground, and power connections directly from the 40-pin pin-description table before routing the PCB. Keep clock traces short and away from switching-node copper, and place input filtering close to the pins where a signal can enter the board. The through-hole footprint makes prototype wiring straightforward, but production layouts should still maintain current-loop geometry and predictable return paths.
Treat the 10-bit ADC inputs as sensitive analog nodes: use a continuous ground reference, avoid coupling them beneath digital or PWM traces, and use appropriate source impedance and filtering. Verify the selected ADC channels and any alternate pin multiplexing in the manufacturer data sheet. Calibration, reference stability, and layout symmetry will usually have a greater effect on usable measurement accuracy than the nominal converter resolution alone.
Do not substitute the related PIC18F4331-I/PT for the -I/P part on an existing board because the former uses a 44-TQFP package. Likewise, do not assume that a sibling PIC18F4431 has identical ADC, PWM, or peripheral assignments. Validate the exact ordering code, package, temperature grade, programming configuration, and every multiplexed pin against the relevant Microchip documentation before releasing a replacement or new layout.
Informações de conformidade
The listed technical and lifecycle information does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the package or family name.
