PIC18F4331-I/P
PIC18F4331-I/P - 8-Bit 40MHz 8KB Flash MCU | Microchip
The Microchip Technology PIC18F4331-I/P is an 8-bit PIC18 microcontroller with a 40 MHz operating frequency, 8 KB of enhanced Flash program memory, and 768 bytes of RAM in a 40-pin plastic dual inline package. It includes a 10-bit analog-to-digital converter and is intended for embedded control applications that combine digital processing with precision analog measurement.
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.
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