PIC18F452-E/P
PIC18F452-E/P - 8-Bit 40MHz Flash MCU | Microchip Technology
The Microchip Technology PIC18F452-E/P is an 8-bit CMOS Flash microcontroller with a 40 MHz clock speed, 32 KB of Flash program memory, 1536 bytes of RAM, 256 bytes of EEPROM, and 34 I/O pins in a 40-pin PDIP package. It also provides eight 10-bit analog-to-digital converter channels, two capture/compare/PWM modules, and serial interfaces configurable for SPI or I2C.
A microcontroller is a programmable integrated circuit that combines a CPU core, memory, digital I/O, timers, communications peripherals, and analog conversion functions on one semiconductor die. The PIC18F452 belongs to the PIC18 8-bit microcontroller family, which is part of the broader embedded-controller hierarchy: PIC18 MCU, 8-bit microcontroller, embedded controller, and embedded semiconductor. This integration allows one device to replace separate processor, timer, communications, and analog-interface components in compact control systems.
Key features include 10 MIPS execution performance, a 77-instruction single-word instruction set, 32 KB of self-programmable Flash memory, 1536 bytes of data RAM, and 256 bytes of EEPROM. The eight-channel 10-bit ADC supports analog sensor acquisition, while the configurable serial peripheral interface supports either 3-wire SPI or 2-wire I2C communication. The operating supply range shown in the verified data is 4.2 V to 5.5 V.
The PIC18F452 architecture provides one 8-bit and three 16-bit timers, as identified by the supplied technical references, together with programmable digital I/O and PWM resources. These peripherals make it possible to measure time, capture input events, generate PWM outputs, acquire analog signals, and communicate with external sensors or controllers without requiring separate logic devices. Its Flash-based program memory also supports field reprogramming when the application requires self-programming.
Typical applications include industrial process-control equipment, environmental monitoring, data acquisition, appliance controllers, instrumentation, and compact embedded products. The eight ADC channels are useful for temperature, pressure, level, and other analog measurements, while SPI and I2C permit connection to displays, sensors, memory devices, and communication transceivers. Its 34 I/O pins also provide ample control and monitoring capacity for moderately complex embedded systems.
Designers should preserve adequate decoupling around the supply pins and route oscillator, reset, analog, and communication signals according to the manufacturer’s recommendations. Firmware must also account for the PIC18F452’s peripheral configuration, interrupt behavior, ADC acquisition requirements, and operating voltage range. The -E grade and PDIP package should be checked against production temperature, environmental, and board-assembly requirements before design release.
This page consolidates the verified manufacturer and distributor information, distinguishes the available same-package alternatives, identifies missing pricing and package-level details, and adds practical application guidance that is not presented as a substitute for the complete Microchip PIC18FXX2 Data Sheet 39564c.
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