PIC16F877-20I/PQ - 8-Bit 20MHz Flash MCU | Microchip
部品番号: PIC16F877-20I/PQ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $14.3108 | $14.31 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
PIC16F877-20I/PQ 概要
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.
ドロップイン代替品: PIC16F877-20I/PQ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16F877-20I/PQ （同一形状・フットプリント） — 相違点: Package, Timers, Operating Temperature, ADC, Core Architecture.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16F877-20I/PT
✅ ドロップイン✓ 在庫あり
$5.1 / 個
データシートを見る →PIC16F877-20I/P
✅ ドロップイン✓ 在庫あり
$5.1 / 個
データシートを見る →PIC16F877T-20/PQ
✅ ドロップイン✓ 在庫あり
$6.24 / 個
データシートを見る →PIC16F877-20/PQ
✅ ドロップイン✓ 在庫あり
$10.3927 / 個
データシートを見る →PIC16F877-04/PQ
✅ ドロップイン✓ 在庫あり
$5.7 / 個
データシートを見る →PIC16F877A-E/L
✅ ドロップイン✓ 在庫あり
$7.4 / 個
データシートを見る →PIC16F877-20I/PQ 最大定格＆電気的特性
| Product Type | 8-bit CMOS flash-based microcontroller |
| 最大クロック周波数 | 20 MHz |
| Program Memory | 14 KB flash, organized as 8K x 14 |
| RAM | 368 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 33 pins |
| パッケージ | 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 |
| 実装タイプ | Surface mount |
| Program Memory Type | Flash |
| Data Memory Type | RAM and EEPROM |
| ライフサイクル状態 | Active |
| Manufacturer | Microchip Technology |
PIC16F877-20I/PQ 44-pin mqfp, 10 mm x 10 mm ピン配置ガイド
PIC16F877-20I/PQ (44-pin mqfp, 10 mm x 10 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: PIC16F877-20I/PQ.
詳細は データシート をご参照ください。
主な用途
PIC16F877-20I/PQ の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16F877-20I/PQ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 20 MHz clock grade with 14 KB flash memory （vs PIC16F877-04/PQ)
- Industrial-temperature ordering suffix （vs PIC16F877-20/PQ)
- 44-pin MQFP integration （vs PIC16F877-20I/P)
設計ノート
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.
コンプライアンス情報
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.
