PIC18F452-E/P - 8-Bit 40MHz Flash MCU | Microchip Technology
料号： PIC18F452-E/P ✓ 量产中PIC18F452-E/P 概述
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.
直接替换替代料： PIC18F452-E/P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F452-E/P （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, I/O Pins, ADC, Communication.
PIC18F452-I/P
✅ 直接替换联系询价
查看数据手册 →PIC18F458-E/PT
✅ 直接替换联系询价
查看数据手册 →PIC18F452-E/P 最大额定值与电气特性
| Microcontroller Type | 8-bit CMOS Flash microcontroller |
| Maximum Clock Speed | 40 MHz |
| Instruction Performance | 10 MIPS |
| Instruction Set Size | 77 single-word instructions |
| Program Memory | 32 KB Flash |
| Data RAM | 1536 bytes |
| EEPROM | 256 bytes |
| ADC Resolution | 10 bits |
| ADC Channels | 8 channels |
| I/O Pins | 34 pins |
| Capture/Compare/PWM Functions | 2 functions |
| Timer Configuration | 1 x 8-bit and 3 x 16-bit timers |
| Serial Interface | Configurable as 3-wire SPI or 2-wire I2C |
| Supply Voltage Range | 4.2 V to 5.5 V |
| 封装 | 40-pin PDIP, 0.600 inch |
| 安装类型 | Through-hole |
| Self-Programming | Supported |
| Development Interface | ICD supported |
| Program Memory Type | ROM Flash |
| 生命周期状态 | Active |
PIC18F452-E/P 40-pin pdip, 0.600 inch 引脚配置指南
PIC18F452-E/P（40-pin pdip, 0.600 inch 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC18F452-E/P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC18F452-E/P 适用于 6 应用s: Industrial process control, Environmental monitoring, Instrumentation and data acquisition, Appliance and equipment controller, Communication-enabled sensor hub, Timing and PWM control.
Industrial process control
The PIC18F452-E/P fits industrial process-control boards that must monitor several analog inputs while coordinating digital actuators. Its eight 10-bit ADC channels provide dedicated analog acquisition capability, while 34 I/O pins support switches, indicators, relays, and interlock signals. At 40 MHz and 10 MIPS, the MCU can coordinate timers, communications, and control logic. The 4.2 V to 5.5 V supply range suits conventional 5 V industrial controller architectures, although the production design must also satisfy its specific temperature-grade, isolation, EMC, and safety requirements.
推荐
Environmental monitoring
PIC18F452-E/P can form the acquisition and control center of an environmental monitor that combines temperature, humidity, pressure, level, or gas sensors. The eight-channel 10-bit ADC reduces the need for multiple analog front ends, while 34 I/O pins provide sensor selection, alarm outputs, and status indicators. Its configurable SPI or I2C port allows connection to digital sensors and memory devices, and the 40 MHz core supports periodic sampling, filtering, threshold evaluation, and data reporting. Power budgeting and environmental suitability remain important because the verified operating-temperature range is not supplied.
推荐
Instrumentation and data acquisition
The PIC18F452-E/P is appropriate for compact instrumentation that must acquire multiple analog channels and perform local control. Eight 10-bit ADC inputs can be sampled under firmware control, while the one 8-bit and three 16-bit timers support precise timing, event capture, and PWM generation. The 32 KB of Flash stores acquisition routines and communication firmware, while 1536 bytes of RAM provides working space for buffering and signal processing. Designers should confirm analog input impedance, sampling requirements, and acquisition timing against Microchip PIC18FXX2 Data Sheet 39564c before establishing measurement accuracy.
推荐
Appliance and equipment controller
PIC18F452-E/P can coordinate appliance or equipment functions such as user inputs, status lamps, relays, motors, and sensor inputs. Its 34 available I/O pins reduce the need for external logic when a product includes several switches and outputs. The two capture/compare/PWM functions and four timers support motor timing, pulse measurement, and other periodic functions, while Flash permits application-code updates. Designers should use the configurable SPI or I2C interface for compatible external modules and account for the device’s 4.2 V to 5.5 V supply requirement in low-voltage power-supply designs.
推荐
Communication-enabled sensor hub
The PIC18F452-E/P can serve as a sensor hub when a system needs to combine local analog measurements with data transfer to a display, logger, or upstream controller. Its synchronous serial port supports 3-wire SPI or 2-wire I2C, allowing the designer to select the bus that best matches the available sensor and peripheral ecosystem. The eight-channel 10-bit ADC handles analog channels, while 32 KB of Flash stores protocol and application firmware. Bus timing, addressing, interrupt behavior, and electrical levels must be validated against the manufacturer data and the characteristics of the connected devices.
推荐
Timing and PWM control
PIC18F452-E/P supports timing-intensive embedded functions through one 8-bit timer, three 16-bit timers, two capture/compare/PWM functions, and a 40 MHz clock. These resources can generate control pulses, measure input periods, implement debounce logic, or coordinate stepper and servo-style sequences. The 32 KB Flash memory provides sufficient room for a self-contained control routine, and the 1536-byte RAM supports multi-state sequencing. For precise timing, the oscillator configuration, instruction timing, peripheral prescaling, and interrupt latency must be calculated from Microchip PIC18FXX2 Data Sheet 39564c rather than assumed from clock frequency alone.
推荐
推荐产品汇总
工程参考数据： PIC18F452-E/P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F452-I/P | PIC18F458-E/P |
|---|---|---|---|
| Package | PDIP-40 | PDIP-40 | PDIP-40 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Device Type | 8-bit Flash microcontroller | 8-bit Flash microcontroller | 8-bit PIC18 microcontroller |
| Program Memory | 32 KB Flash | 32 KB Flash | 32 KB Flash |
| Data RAM | 1536 bytes | 1536 bytes | 1536 bytes |
| Temperature-Grade Suffix | -E/P | -I/P | -E/P |
关键差异点
- Extended-temperature order option within the same 40-pin DIP family （对比 PIC18F452-I/P)
- Eight-channel 10-bit analog acquisition （对比 PIC18F458-E/P)
- Single package combines control and communications （对比 PIC18F452-I/P)
- 10 MIPS execution performance for an 8-bit architecture （对比 PIC18F458-E/P)
设计说明
Design the supply network for the verified 4.2 V to 5.5 V operating range and place the manufacturer-recommended bypass capacitors close to the appropriate supply pins. Because a 40-pin PIC18 controller can switch numerous I/O loads, separate noise-sensitive analog and digital supply paths where the board architecture permits. Confirm capacitor voltage ratings, regulator tolerance, startup behavior, and the controller’s maximum total I/O current in Microchip PIC18FXX2 Data Sheet 39564c rather than assuming every pin can source maximum current simultaneously.
Keep the crystal or oscillator circuit, reset path, and decoupling components close to their associated MCU pins to limit susceptibility to switching noise and capacitive loading. Route high-current or inductive loads away from sensitive analog inputs, and provide a clear ground-return strategy for motors, relays, and display interfaces. The PDIP package is through-hole, but lead spacing alone does not determine signal integrity; component placement and current-loop geometry remain important on a mixed-signal controller board.
Do not treat a matching PDIP package as proof that every alternative is electrically and software interchangeable. The -E/P and -I/P order codes identify different temperature grades, while PIC18F458-E/P may have peripheral and pin-function differences not exposed by the supplied snippets. Review the pin table, oscillator limits, ADC behavior, timer resources, interrupt vectors, and peripheral configuration in Microchip PIC18FXX2 Data Sheet 39564c before releasing a replacement to production.
Plan analog and digital interfaces according to the selected peripheral mode. For the ADC, account for source impedance, acquisition time, reference stability, and the 10-bit resolution before defining the required measurement bandwidth. For SPI or I2C, use pull-up arrangements and routing appropriate to the selected bus and connected-device capacitance. The verified data confirms support for 3-wire SPI and 2-wire I2C, but detailed timing and electrical limits must be taken from the manufacturer datasheet.
合规信息
The supplied search results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because no automotive qualification was identified in the verified data.
