PIC16F877-04/P - 4MHz 8-Bit Flash MCU 14KB | Microchip
MPN: PIC16F877-04/P ✓ نشطPIC16F877-04/P نظرة عامة
A microcontroller is a compact integrated circuit that executes programmed instructions and coordinates sensors, actuators, communications, and timing functions. The PIC16F877 belongs to the PIC16 family of 8-bit RISC microcontrollers and provides a broad peripheral set for embedded systems, instrumentation, motor-control support, communications, and legacy control designs. The -04 suffix identifies the 4 MHz speed grade, while /P denotes the PDIP package.
Key features include 8K words of Flash program memory, 256 bytes of EEPROM data memory, 368 bytes of RAM, 33 I/O lines, and a 10-bit ADC with eight channels. The device also provides synchronous serial capabilities configurable for SPI or I2C, a serial port usable as UART/USART, two additional timers, and two capture/compare/PWM functions. Its 40-pin package provides convenient through-hole construction and broad signal access.
The PIC16F877 architecture supports the PIC instruction set and combines EEPROM, Flash programming, and self-programming capabilities. The manufacturer product page describes the device as a 200 ns instruction-execution architecture with 35 single-word instructions. These features make it useful where deterministic control, moderate memory capacity, and a mature peripheral combination are more important than very high clock speed or very large flash capacity.
Typical applications include industrial control panels, data acquisition and instrumentation, educational electronics, motor and relay interfaces, sensor nodes, communications bridges, and legacy embedded products. The ADC supports analog measurement, while UART, SPI, and I2C allow connection to sensors, transceivers, displays, and storage devices. The 33 I/O pins provide flexibility for control and status signals.
For new layouts, verify oscillator, programming, reset, analog, and serial-interface requirements against the manufacturer datasheet before finalizing the PCB. Existing PIC16F877 systems may be easier to maintain with the same device family, but firmware, timing, and pin-level compatibility must be checked whenever the MCU is changed. This page combines verified product facts with practical application guidance and clearly flags unavailable specifications.
بدائل مباشرة لـ PIC16F877-04/P — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16F877-04/P (نفس عامل الشكل والبصمة) — يختلف في Package, ADC, Timers, Core Architecture, Operating Temperature Range.
PIC16F877-04E/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F887-E/P
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F877-04/P الحدود القصوى والخصائص الكهربائية
| Core Processor | 8-bit |
| أقصى تردد للساعة | 4 MHz |
| Flash Program Memory | 14 KB (8K x 14 words) |
| EEPROM Data Memory | 256 bytes |
| RAM | 368 bytes |
| Number of I/O Pins | 33 |
| ADC | 8 channels, 10-bit |
| Serial Interfaces | UART/USART, SPI, I2C |
| Timers | Two additional timers |
| Capture/Compare/PWM | Two functions |
| العلبة | 40-pin PDIP |
| Package Type | Through-hole |
| درجة حرارة التشغيل | 0C to 70C TA |
| Programming | Flash, self-programming |
| Brown-Out Reset | Supported |
| Power-On Reset | Supported |
| Watchdog Timer | Supported |
دليل تكوين أطراف PIC16F877-04/P through-hole
تكوين الأطراف لـ PIC16F877-04/P (حزمة through-hole). تتضمن هذه الدائرة المتكاملة الرقمية GPIO وواجهات الاتصال (UART وSPI وI2C) وأطراف الطاقة. راجع ورقة بيانات الشركة المصنعة لوظائف الأطراف البديلة وخيارات التكوين. ضرورية لتصميم الأنظمة المدمجة وتخطيط PCB.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ PIC16F877-04/P.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
PIC16F877-04/P مناسب لـ 6 التطبيقs: Industrial Control Panels, Data Acquisition and Instrumentation, Motor and Relay Interfaces, Sensor and Communications Nodes, Educational and Prototype Systems, Legacy Communication Bridges.
Industrial Control Panels
PIC16F877-04/P fits legacy industrial control panels that need moderate processing speed, discrete control I/O, analog monitoring, and serial connectivity. Its 4 MHz clock and 33 I/O pins can support relay logic, status indicators, operator inputs, and sensor multiplexing, while the eight-channel 10-bit ADC provides a practical interface for analog transducers. UART/USART, SPI, and I2C allow connection to local displays, sensors, or communications modules. The listed 0C to 70C TA operating range makes it appropriate for indoor or moderate-temperature equipment, but supply voltage and compliance details remain unavailable in the supplied data.
موصى به
Data Acquisition and Instrumentation
PIC16F877-04/P is suitable for instrumentation front ends requiring several analog inputs, digital status signals, and flexible communication. The eight 10-bit ADC channels can measure temperature, pressure, potentiometer positions, or other slowly varying analog quantities, while 33 I/O pins support switches, indicators, and measurement-control signals. Serial UART/USART, SPI, or I2C connectivity enables data transfer to a host computer or peripheral. Designers should verify ADC reference, sampling requirements, supply voltage, and calibration strategy against the manufacturer datasheet because those details are not supplied here.
موصى به
Motor and Relay Interfaces
PIC16F877-04/P can coordinate motor, relay, and actuator control in legacy embedded systems where a deterministic 8-bit MCU and multiple I/O lines are useful. The 33 available I/O pins can distribute control and feedback signals, while timers and PWM functions support timing-based motor or lamp control. Its 4 MHz operating speed is appropriate for many open-loop or modest closed-loop systems, but exact PWM frequency, timer resolution, and output-drive limits must be taken from the device documentation. Add suitable driver transistors, protection networks, and isolation as required by the load.
موصى به
Sensor and Communications Nodes
PIC16F877-04/P works as a small embedded controller for sensor nodes that combine local measurement, digital I/O, and serial communications. SPI can support faster peripheral devices, while I2C is useful for common sensors and EEPROMs; UART/USART provides a straightforward path to a host or modem. The 14 KB Flash and 368 bytes RAM are meaningful for small control firmware, but protocol buffering and logging must be sized carefully. Verify peripheral electrical limits, bus timing, and firmware support before choosing it for a new high-throughput design.
موصى به
Educational and Prototype Systems
PIC16F877-04/P remains useful for educational embedded-control platforms because it combines an accessible 8-bit architecture with Flash memory, EEPROM, ADC channels, timers, PWM, and multiple serial interfaces. Students can exercise GPIO, interrupts, timing, analog conversion, and protocol handling in one through-hole DIP device that is easy to place on a prototype board. The 40-pin package exposes more signals than very small modern MCUs, simplifying breadboard and educational wiring. Firmware examples should still follow the exact pinout and configuration requirements of the selected package.
موصى به
Legacy Communication Bridges
PIC16F877-04/P can bridge older serial equipment and embedded controllers because it provides UART/USART plus configurable SPI and I2C interfaces. A bridge design can translate between a local sensor or display and a host interface, perform protocol buffering, or monitor control signals. The 368 bytes of RAM and 14 KB Flash are adequate for many compact protocol converters, but throughput and buffering should be calculated for the selected baud rate and packet size. For production use, confirm timing, electrical levels, watchdog behavior, and package availability with current manufacturer data.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16F877-04/P — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16F877-04E/P | PIC16F887 |
|---|---|---|---|
| Core Processor | 8-bit | 8-bit related family variant | 8-bit related family variant |
| Package | 40-pin PDIP | 40-pin PDIP candidate | 40-pin PDIP candidate, verify manufacturer package data |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
أبرز الفروقات
- Established PIC16F877 legacy platform (مقابلPIC16F887)
- Broad integrated peripheral set (مقابلPIC16F877-04E/P)
- Through-hole legacy PCB compatibility (مقابلPIC16F887)
ملاحظات التصميم
Use the verified 40-pin PDIP footprint and preserve the manufacturer pin numbering exactly. Before routing, confirm oscillator, programming, reset, power, ground, analog, UART/USART, SPI, and I2C assignments from the datasheet because the supplied data does not include a complete pin table. Leave access to programming and debug signals, and avoid placing long traces beside sensitive analog inputs.
Confirm the supply-voltage range and decoupling requirements before final schematic release. The verified data confirms a 4 MHz CMOS Flash MCU with 256 bytes of EEPROM, but it does not state operating-voltage limits or recommended capacitor values. Apply the manufacturer’s supply and layout guidance rather than copying generic values, especially if the ADC reference or oscillator supply shares the same rail.
Do not treat a related family name as an automatic drop-in replacement. The verified cross-reference results identify PIC16F877-04E/P and mention PIC16F887, but they do not establish every pin, timing, temperature, voltage, and peripheral parameter. Review the exact ordering code and datasheet before substituting, particularly when existing firmware depends on oscillator settings, interrupt behavior, ADC calibration, or serial peripheral mappings.
The supplied operating-temperature listing is 0C to 70C TA, but the data does not provide junction-temperature limits, thermal resistance, or maximum dissipation. For enclosed or elevated-temperature equipment, calculate the actual dissipation from the final supply and I/O load, then verify the package and ambient limits against the manufacturer documentation. Use appropriate airflow or copper spreading only after confirming the thermal model.
معلومات الامتثال
The supplied verified data does not provide exact compliance statements for PIC16F877-04/P. Obtain current manufacturer or distributor documentation before making a compliance claim.
