PIC16F877-20I/PQ - 8-Bit 20MHz Flash MCU | Microchip
MPN: PIC16F877-20I/PQ ✓ فعالPIC16F877-20I/PQ نمای کلی
An 8-bit microcontroller is a compact embedded-processing component that combines a CPU core, program memory, data memory, and peripherals in one semiconductor device. The PIC16F877 belongs to the PIC16 family and uses a Harvard-style embedded architecture with single-word instructions. Microchip describes the family as capable of 200 ns instruction execution and programming with only 35 single-word instructions, making it suitable for control systems that need deterministic peripheral handling and straightforward firmware development.
The verified feature set includes 14 KB of flash program memory, 368 bytes of RAM, 256 bytes of EEPROM, 33 I/O pins, and a maximum clock frequency of 20 MHz. The MCU is identified in distributor listings as supporting I2C, SPI, and UART interfaces. These serial peripherals allow connection to sensors, displays, transceivers, and other embedded modules without requiring separate interface devices. Flash memory supports in-system reprogramming workflows, while EEPROM provides nonvolatile storage for parameters and calibration data.
PIC16F877-20I/PQ is packaged in a 44-pin MQFP, making it suited to moderate-size control boards and legacy industrial equipment where through-hole assembly and a larger pin count are useful. The exact MCU pin names and electrical operating limits are not fully present in the supplied excerpts; those values remain marked for verification against the manufacturer datasheet. Microchip’s product page identifies PIC16F887 as a newer device to consider, so engineers should evaluate that option for new designs rather than assuming direct software or peripheral equivalence.
Typical applications include industrial automation controllers, sensor interfaces, motor and relay control, instrumentation panels, communication hubs, and embedded systems requiring I2C, SPI, or UART connectivity. The 33 I/O pins provide useful peripheral distribution for discrete inputs and outputs, while the 20 MHz operating rate supports time-sensitive control tasks. The larger MQFP footprint is less compact than modern fine-pitch packages but can simplify prototyping and serviceability.
A key design consideration is migration from PIC16F877 to a newer MCU. Replacing the MCU requires checking package pinout, memory map, interrupt behavior, peripheral registers, and firmware compatibility rather than relying only on the family name. For new compact or highly connected products, compare PIC16F887 or another current family member against the required package and peripheral requirements.
This product page consolidates verified distributor specifications, manufacturer availability information, package details, and engineering-oriented selection notes. It does not invent missing pin-level or electrical values; unavailable details are explicitly identified so procurement and design teams can verify them against the manufacturer datasheet before release to production.
جایگزین‌های drop-in برای PIC16F877-20I/PQ — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16F877-20I/PQ (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Timers, Operating Temperature, ADC, Core Architecture.
PIC16F877-20I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-20I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877T-20/PQ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-20/PQ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-04/PQ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877A-E/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-20I/PQ حداکثر مقادیر مجاز و مشخصات الکتریکی
| Product Type | 8-bit CMOS flash-based microcontroller |
| حداکثر فرکانس کلاک | 20 MHz |
| Program Memory | 14 KB flash, organized as 8K x 14 |
| RAM | 368 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 33 pins |
| بسته‌بندی | 44-pin MQFP, 10 mm x 10 mm |
| Architecture | 8-bit PIC RISC |
| Instruction Execution | 200 ns |
| Instruction Set | 35 single-word instructions |
| Serial Interfaces | I2C, SPI, UART |
| Temperature Grade | Industrial grade, -40 °C to +85 °C |
| نوع نصب | Surface mount |
| Program Memory Type | Flash |
| Data Memory Type | RAM and EEPROM |
| وضعیت چرخه عمر | Active |
| Manufacturer | Microchip Technology |
راهنمای پیکربندی پین PIC16F877-20I/PQ 44-pin mqfp, 10 mm x 10 mm
پیکربندی پین برای PIC16F877-20I/PQ (پکیج 44-pin mqfp, 10 mm x 10 mm). این IC دیجیتال شامل GPIO، رابط‌های ارتباطی (UART، SPI، I2C) و پین‌های تغذیه است. برای عملکردهای جایگزین پین و گزینه‌های پیکربندی به دیتاشیت سازنده مراجعه کنید. ضروری برای طراحی سیستم‌های نهفته و چیدمان PCB.
داده پین‌آوت تفصیلی موجود نیست برای PIC16F877-20I/PQ.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
PIC16F877-20I/PQ مناسب است برای 6 کاربردs: Industrial Automation Controller, Sensor and Measurement Interface, Motor and Relay Control, Instrumentation and Data Logger, Communication Hub, Embedded Control Board.
Industrial Automation Controller
PIC16F877-20I/PQ fits an industrial automation controller that must monitor many discrete inputs and drive relays, lamps, or actuator interfaces. Its 33 I/O pins provide a broad peripheral distribution, while 20 MHz operation supports responsive control logic. The 44-pin MQFP also leaves room for serial communication and expansion. Designers should use the industrial temperature grade only after checking the full operating-temperature requirement and applying appropriate isolation, protection, and grounding for the factory environment.
پیشنهادی
Sensor and Measurement Interface
The PIC16F877-20I/PQ can serve as the control MCU for a multi-sensor measurement node when the board needs both local I/O and serial expansion. I2C and SPI support allow connection to sensors and converters, while UART provides a host or service-port link. Its 368-byte RAM and 256-byte EEPROM are useful for calibration constants and operating configuration. Firmware should validate sensor timing, isolate analog inputs, and account for the 20 MHz clock’s effect on communication and sampling latency.
پیشنهادی
Motor and Relay Control
For a relay or small-motor control board, PIC16F877-20I/PQ combines a 20 MHz MCU with 33 I/O pins and 14 KB of flash for sequencing, interlocks, and fault handling. The MCU can generate timing and control signals while UART, SPI, or I2C connects to a supervisory controller. Separate driver transistors, flyback protection, and isolation are required; the microcontroller’s I/O ratings and electrical limits must be checked before directly driving inductive loads.
پیشنهادی
Instrumentation and Data Logger
PIC16F877-20I/PQ can control an instrumentation front end that gathers digital measurements and forwards them through UART or SPI. The 256-byte EEPROM supports small configuration records, while flash provides space for application firmware and lookup tables. The device should be paired with a suitable ADC or sensor interface and an external nonvolatile memory solution when continuous logging exceeds the internal EEPROM. Watchdog and brownout behavior should be enabled according to the manufacturer’s device guidance.
پیشنهادی
Communication Hub
The PIC16F877-20I/PQ is suitable for a compact communication hub that aggregates a UART service port with SPI or I2C peripheral links. Its 14 KB flash memory can hold protocol handling and configuration firmware, and the 44-pin package provides enough connections for multiple interface signals and control inputs. Designers should define bus termination, address conflicts, and fault recovery before using the MCU in a hub, because UART, SPI, and I2C have different electrical and timing requirements.
پیشنهادی
Embedded Control Board
PIC16F877-20I/PQ works well as the central controller in a larger embedded control board with user inputs, status indicators, and service communications. Its 33 I/O pins simplify direct connection to keys, displays, and discrete interface circuits, while flash permits firmware updates during development. The MQFP package is larger than a fine-pitch modern package but remains practical for prototypes and serviceable industrial assemblies. Production designs should include programming, reset, decoupling, and clock circuitry exactly as specified by the manufacturer.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16F877-20I/PQ — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16F877-20I/PT | PIC16F877-20I/P | PIC16F877T-20/PQ | PIC16F877-20/PQ | PIC16F877-04/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin MQFP, 10 mm x 10 mm | TQFP-44 | DIP-40 | TQFP-44 | MQFP-44 | MQFP-44 |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Program Memory | 14 KB flash, 8K x 14 | 14 KB flash | 14 KB flash | 14 KB flash | 14 KB flash | 14 KB flash |
| RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Serial Interfaces | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART |
تفاوت‌های کلیدی
- 20 MHz clock grade with 14 KB flash memory (در مقابلPIC16F877-04/PQ)
- Industrial-temperature ordering suffix (در مقابلPIC16F877-20/PQ)
- 44-pin MQFP integration (در مقابلPIC16F877-20I/P)
یادداشت‌های طراحی
Treat the 44-pin MQFP footprint as a package-specific land pattern and place decoupling capacitors close to the device power pins according to the manufacturer layout guidance. Keep oscillator routing short and away from high-current switching nodes. Because the supplied data confirms a 10 mm x 10 mm MQFP but does not provide the complete pin table or recommended land geometry, verify the exact package drawing and pin numbering before releasing artwork.
Do not assume that every PIC16F877 order code is interchangeable. PIC16F877-20I/PQ, PIC16F877-20/PQ, and PIC16F877-04/PQ differ in temperature or clock grade, while TQFP, MQFP, and DIP variants require different PCB footprints. Confirm the ordering suffix, package drawing, pin names, speed grade, temperature range, and fuse configuration before substitution.
Use a regulator and decoupling network sized for the MCU supply requirements in the manufacturer datasheet. The verified data provides frequency, memory, and package information but does not provide the complete operating-voltage and current limits, so do not infer those values from the package. Validate brownout, reset, and power sequencing behavior with the actual oscillator and peripheral load conditions.
Assign UART, SPI, I2C, reset, programming, and oscillator signals during schematic review before fixing the PCB footprint. The 33 I/O pins provide flexibility, but multiplexed functions can create routing conflicts on a 44-pin package. Check every alternate-function mapping and exposed programming interface against the official datasheet rather than a generic PIC16 diagram.
اطلاعات انطباق
The supplied verified data identifies an industrial-temperature PIC16F877 grade but does not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than inferred.
