PIC16F877A-I/ML - 8-Bit 20MHz 14KB Flash MCU | Microchip
MPN: PIC16F877A-I/ML ✓ AktifPIC16F877A-I/ML Genel Bakış
A microcontroller is a complete embedded-control component that integrates a processor core, nonvolatile program memory, data memory, I/O ports, timers, and communication interfaces. Within the hierarchy of semiconductor and embedded systems, a PIC16 microcontroller sits below the broader category of microcontrollers and above application-specific control controllers. The PIC16F877A combines this integration with an established PIC instruction set and software development ecosystem.
Verified distributor information identifies 14 KB of flash program memory organized as 8K by 14 words, 368 bytes of data RAM, 33 I/O pins, and operation up to 20 MHz. The manufacturer snippet also confirms 200 ns instruction execution and only 35 single-word instructions. Other device capabilities—including RAM organization beyond the stated 368 bytes, EEPROM capacity, I/O electrical limits, ADC resolution, USART availability, timer resources, and operating-temperature limits—were not included in the supplied verified data and therefore are not asserted here.
The -I grade suffix denotes the manufacturer's industrial temperature option, but the exact numerical temperature limits are not present in the provided search records. The /ML suffix identifies the 44-pin QFN package and its supported manufacturing configuration. This package differs from the PIC16F877A-I/P 40-pin through-hole variant, so the package suffix and land pattern must be checked before substitution rather than relying only on the base device name.
Typical engineering uses include embedded control, instrumentation, educational MCU platforms, and legacy industrial equipment where a compact 8-bit controller and sufficient I/O capacity are required. The device's 20 MHz maximum clock and 33 I/O pins provide useful control bandwidth for digital state machines, timing functions, and peripheral integration. Firmware performance still depends on instruction count, interrupt structure, memory access, and the selected clock configuration.
When laying out a board, preserve the exposed-pad and land-pattern requirements of the 44-pin QFN, confirm every power and ground connection, and route sensitive interfaces away from noisy switching nodes. Firmware migration also requires validation of configuration words, peripheral registers, interrupt behavior, and application timing rather than assuming binary or peripheral compatibility from a similar PIC16 device.
This page consolidates the verified manufacturer capability statement, distributor package and memory data, lifecycle information, sourcing links, and replacement analysis. It separates confirmed values from missing technical data so engineers can compare the part without relying on unverified parameter guesses.
Drop-in alternatifler için PIC16F877A-I/ML — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller PIC16F877A-I/ML (aynı form faktörü ve ayağa oturma) — farklı olan Package, Operating Temperature Range, ADC, Program Memory Size, Operating Voltage Range.
PIC16F877A-I/ML
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Veri Şablonunu Görüntüle →PIC16F877A-E/ML
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Veri Şablonunu Görüntüle →PIC16F877A-I/ML Maksimum Değerlendirmeler & Elektriksel Özellikler
| Device Type | 8-bit CMOS flash microcontroller |
| Azami Saat Hızı | 20 MHz |
| Program Memory | 14 KB (8K x 14 flash words) |
| Data RAM | 368 bytes |
| I/O Pin Count | 33 pins |
| Instruction Execution Time | 200 ns minimum per verified manufacturer statement |
| Single-Word Instruction Count | 35 instructions |
| Architecture | PIC 8-bit RISC architecture |
| Program Memory Technology | CMOS flash |
| Paket | 44-pin QFN, 8 mm x 8 mm |
| Montaj Türü | Surface mount |
| Grade | Industrial grade |
| Yaşam Döngüsü Durumu | Active |
PIC16F877A-I/ML 44-pin qfn, 8 mm x 8 mm Pin Yapısı Kılavuzu
PIC16F877A-I/ML (44-pin qfn, 8 mm x 8 mm paket) için pin yapısı. Bu dijital IC, GPIO, iletişim arayüzleri (UART, SPI, I2C) ve güç pinleri içerir. Alternatif pin işlevleri ve yapılandırma seçenekleri için üretici veri kitapçığını referans alın. Tünel sistem tasarımı ve PCB yerleşimi için temel bir bileşendir.
Ayrıntılı pin çıkış verisi mevcut değil: PIC16F877A-I/ML.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
PIC16F877A-I/ML için uygundur 6 uygulamas: Embedded Instrument Control, Educational MCU Platform, Industrial Digital Controller, Data Acquisition Front End, Motor and Automation Controller, Legacy Peripheral Emulation.
Embedded Instrument Control
PIC16F877A-I/ML fits instrument-control boards that need a compact 8-bit controller with 20 MHz operation, 14 KB of program Flash, 368 bytes of RAM, and 33 I/O pins. The QFN package reduces board area compared with a 40-pin through-hole arrangement, while the processor's 200 ns minimum instruction-execution statement supports responsive digital control loops. The MCU can supervise switches, indicators, sensors, and actuators when those functions fit its available pins and verified electrical limits. Before schematic capture, confirm operating voltage, ADC specifications, timer resources, and serial interfaces from the manufacturer datasheet.
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Educational MCU Platform
PIC16F877A-I/ML is suitable for educational embedded-systems platforms because its verified 20 MHz clock, 14 KB Flash, and 368-byte RAM provide enough scale for interrupts, timers, serial communication experiments, and small control projects. Its established PIC architecture and 35 single-word instructions offer a manageable learning model. The 44-pin QFN package is less convenient for hand soldering than a through-hole package, so training boards should provide suitable land patterns, thermal-pad handling, and accessible programming and debug connections.
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Industrial Digital Controller
PIC16F877A-I/ML can serve as the central controller in compact industrial digital modules where an 8-bit MCU, 20 MHz maximum clock, and 33 I/O pins are sufficient. Its industrial-grade ordering code is relevant to equipment operating outside consumer-only conditions, although the exact numerical temperature limits must be checked before release. Design the power, input protection, and output drivers independently from the MCU, and verify timing margins for relays, displays, sensors, and communication links under worst-case loading.
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Data Acquisition Front End
PIC16F877A-I/ML can coordinate data-acquisition logic when its verified 14 KB Flash, 368-byte RAM, and 33 I/O pins fit the buffering and sequencing requirements. The MCU can organize control signals around analog front ends, although ADC resolution, sample capability, input range, and acquisition timing are not stated in the supplied verified records. Confirm those specifications in the official datasheet, partition analog and digital return currents, and avoid feeding switching-node noise into precision sensor paths.
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Motor and Automation Controller
PIC16F877A-I/ML is appropriate for small automation and motor-control supervisory boards when firmware sequencing and I/O density are more important than a high-performance digital motor loop. The 20 MHz clock supports deterministic state-machine logic, while the 33 I/O pins can connect position, limit, interlock, and command signals. External drivers, current sensing, and protection remain necessary; the supplied data does not verify PWM resolution, capture/compare channels, ADC performance, or motor-control timings, so those functions require datasheet confirmation.
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Legacy Peripheral Emulation
PIC16F877A-I/ML can support compatibility designs that need to reproduce the behavior of established PIC16F877A-based equipment. Its 20 MHz maximum clock, 14 KB program memory, 368-byte RAM, and 33 I/O pins match the target device's verified baseline, allowing existing control logic to be retained when the original package is unavailable through qualified sourcing. Successful substitution depends on exact configuration words, reset behavior, interrupts, peripherals, and timing. Firmware should be regression-tested at voltage and temperature extremes before production deployment.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: PIC16F877A-I/ML — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | PIC16F877A-I/ML | PIC16F877A-E/ML |
|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same suffix designation |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
Ana Farklılayıcılar
- Exact verified package identity (karşılaştırma:PIC16F877A-I/P)
- Confirmed performance baseline (karşılaştırma:PIC16F877A-E/ML)
- Application-specific industrial grade (karşılaştırma:PIC16F877A-E/ML)
Tasarım Notları
Design the footprint from the official 44-pin QFN drawing rather than treating all ML variants as generic QFN packages. Confirm pad dimensions, pin numbering, terminal-pitch details, solder-mask policy, and the exposed thermal pad connection before release. The verified data confirms an 8 mm by 8 mm 44-QFN package but does not supply the land pattern, so dimensions must be taken from the manufacturer package drawing.
Decouple each applicable supply pin at the package with the capacitance and placement required by the manufacturer datasheet. Keep high-current return paths compact and route digital and analog returns so switching loads do not share noisy current paths with precision inputs. Operating voltage, absolute maximum ratings, and pin-specific limits are [DATA_NEEDED] in the supplied records and must not be inferred from the 20 MHz clock rating.
Reserve programming and debug access according to Microchip's supported interface and the selected development tool. Place test points where they do not compromise QFN assembly or expose sensitive nodes. Because the verified record does not include a complete pinout, freeze board connectivity only after checking every 44-pin symbol, programming connection, supply, ground, and exposed-pad assignment against the official datasheet.
Do not substitute PIC16F877A-I/P for PIC16F877A-I/ML on an existing board: the former is a listed 40-pin through-hole package and the latter is a 44-pin QFN. Likewise, a similarly named PIC16F887 or PIC18 device may be only a functional alternative. Validate exact package, pin functions, memory, peripherals, configuration words, interrupts, voltage, timing, and firmware before approving a replacement.
Uyumluluk Bilgisi
The supplied verified records state that the device is active but do not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. No compliance status has been inferred. AEC-Q100 is marked not applicable because no automotive qualification claim was supplied for this industrial-grade MCU.
