PIC16F877T-20I/PQ - 20MHz 8-Bit MCU | Microchip
部品番号: PIC16F877T-20I/PQ ✓ 生産中PIC16F877T-20I/PQ 概要
An 8-bit microcontroller is a programmable semiconductor that integrates a CPU core, program memory, data memory, I/O ports, timers, and communication peripherals on one device. The PIC16F877 family belongs to the mid-range PIC16 product hierarchy, where the flash-based architecture supports in-circuit reprogramming and a compact instruction set suited to industrial controllers, instruments, appliances, and legacy embedded platforms.
Key features include 14KB Flash memory, 368 bytes of RAM, 33 digital I/O lines, and a 20MHz operating speed. According to the Microchip PIC16F877 product-page snippet, the device provides 200ns instruction execution and uses only 35 single-word instructions. These characteristics make the PIC16F877T-20I/PQ appropriate for designs requiring deterministic control, compact firmware, and a broad collection of on-chip peripherals.
The PIC16 architecture uses separate program and data memory spaces and is upward compatible with earlier PIC16C5X, PIC12CXXX, and PIC16C7X devices, as stated on the Microchip product page. Its 44-pin MQFP provides a higher I/O count than 40-pin DIP variants, while the 20MHz speed rating supports more demanding timer, serial-interface, and control-loop workloads than 4MHz implementations.
Typical applications include industrial monitoring equipment, temperature controllers, motor and relay controllers, data-acquisition front ends, instrumentation, and general-purpose embedded control. The same 44-pin package is also used by newer PIC16F887 devices, which Microchip identifies as a newer device for the PIC16F877 family and which are discussed as having the same pinout in replacement guidance.
Designers should verify the exact pin assignment, oscillator configuration, programming interface, and peripheral availability against the manufacturer datasheet before a hardware revision. The -40°C to +85°C industrial temperature range supports deployed equipment, but electromagnetic robustness, watchdog strategy, brownout behavior, and communication timing must still be validated for the end application.
This product page combines the verified device specifications, lifecycle information, observed distributor pricing, pin-compatible replacement candidates, and application guidance to provide practical information beyond a basic manufacturer ordering-table entry. Alternative listings remain subject to firmware, peripheral, and qualification review.
ドロップイン代替品: PIC16F877T-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: PIC16F877T-20I/PQ （同一形状・フットプリント） — 相違点: Package, Program Memory Type, Architecture, Product Type, Program Memory.
PIC16F877T-20/PQ
✅ ドロップイン価格はお問い合わせください
データシートを見る →PIC16F877A-20I/PQ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16F887-I/PQ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC16F877A-20/PQ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16F877T-20I/PQ 最大定格＆電気的特性
| Product Type | 8-bit CMOS Flash Microcontroller |
| 最大クロック周波数 | 20 MHz |
| Instruction Execution Time | 200 ns |
| Program Memory | 14KB Flash |
| Program Memory Organization | 8K x 14 words |
| Data Memory | 368 bytes RAM |
| Digital I/O | 33 I/O |
| Architecture | PIC16 8-bit RISC |
| Instruction Set | 35 single-word instructions |
| パッケージ | 44-pin MQFP (10 mm x 10 mm) |
| Temperature Grade | Industrial, -40°C to +85°C |
| ADC Resolution | 10-bit |
| Program Memory Type | Flash, reprogrammable |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
| Lead-Free Status | unknown |
| Observed Unit Price | $14.3108 as of 2026-10-28 |
PIC16F877T-20I/PQ 44-pin mqfp (10 mm x 10 mm) ピン配置ガイド
PIC16F877T-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: PIC16F877T-20I/PQ.
詳細は データシート をご参照ください。
主な用途
PIC16F877T-20I/PQ の用途: 6 件s: Industrial Monitoring Controller, Temperature and Process Control, Motor and Relay Control, Data Acquisition Front End, Instrumentation and Test Equipment, Appliance and Embedded Control.
Industrial Monitoring Controller
The PIC16F877T-20I/PQ fits industrial monitoring equipment because it combines a 20MHz clock, 14KB of Flash, 368 bytes of RAM, and 33 I/O pins in a 44-pin MQFP package. Its -40°C to +85°C industrial temperature range also matches many factory-floor enclosure requirements. A monitoring controller can use the GPIO ports for digital sensor inputs and status indicators while timers and serial interfaces support periodic sampling. The 200ns instruction-execution figure cited by Microchip provides headroom for interrupt-driven acquisition and local logic. Before release, verify analog-channel availability, communication timing, watchdog behavior, and brownout settings against the manufacturer datasheet.
おすすめ
Temperature and Process Control
The PIC16F877T-20I/PQ is suitable for temperature-control and process-loop modules where deterministic execution, several digital I/O points, and compact embedded firmware are important. Its 20MHz operating speed and 200ns instruction time support fast control-loop scheduling, while 14KB Flash provides room for a bootloader or application logic. The 368-byte RAM is sufficient for short working buffers but should be checked against the selected algorithm and communication buffers. Analog and PWM implementation details are not supplied in the verified excerpts, so engineers should verify the relevant peripheral resources directly from Microchip documentation before assigning heater, actuator, or sensor signals.
おすすめ
Motor and Relay Control
PIC16F877T-20I/PQ can serve as the supervisory controller in a motor, solenoid, or relay system that requires multiple discrete I/O points and rapid deterministic firmware execution. Its 33 I/O pins provide more interface capacity than smaller 8-bit packages, while the 20MHz speed supports faster state-machine updates and timing functions. The device does not directly provide the power-stage ratings required by motors, so transistors, relays, protection networks, and suitable flyback paths must be added. Confirm timer outputs, capture/compare resources, pin multiplex functions, and maximum transition requirements in the official datasheet before finalizing the schematic or PCB.
おすすめ
Data Acquisition Front End
The PIC16F877T-20I/PQ is appropriate for a compact acquisition front end because the verified specifications identify a 10-bit ADC, 14KB Flash, 368 bytes of RAM, and 33 I/O pins. The 20MHz clock allows the firmware to sequence samples, apply calibration, and transfer data through an available serial interface. The 44-pin MQFP also offers more I/O than DIP-only 40-pin variants, although exposed-pad and thermal details are not provided in the verified data. Engineers must verify ADC channel multiplexing, acquisition timing, reference requirements, and the availability of communications peripherals in the manufacturer datasheet before defining the analog front end.
おすすめ
Instrumentation and Test Equipment
PIC16F877T-20I/PQ can support compact instrumentation because it combines 20MHz execution, 14KB of program Flash, 368 bytes of RAM, and 33 I/O pins in a 44-pin package. Those resources suit front-panel control, status sequencing, switch scanning, relay outputs, and communication with a host or measurement module. The industrial temperature option covers equipment intended for moderate industrial environments, although calibration accuracy, EMC performance, and safety isolation depend on the complete instrument rather than the MCU. Verify oscillator accuracy, timer resolution, communication baud-rate error, and unused-pin behavior against the official documentation before production release.
おすすめ
Appliance and Embedded Control
The PIC16F877T-20I/PQ is well suited to appliance controllers and compact embedded products that need programmable logic, multiple I/O connections, and field-updatable Flash memory. Its 20MHz speed provides more responsive state-machine control than slower 4MHz PIC16 implementations, while 14KB of Flash can hold application code and boot logic. The 368-byte RAM supports small state and communication structures but may constrain large protocol stacks or display buffers. Before committing the product, verify the exact peripheral mix, oscillator arrangement, configuration-word defaults, and programming procedure in the current Microchip documentation.
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: PIC16F877T-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 | PIC16F877T-20/PQ | PIC16F877A-20I/PQ | PIC16F887-I/PQ | PIC16F877A-20/PQ |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin MQFP (10 mm x 10 mm) | 44-pin MQFP (10 mm x 10 mm) | 44-pin MQFP (10 mm x 10 mm) | 44-pin MQFP (10 mm x 10 mm) | 44-pin MQFP (10 mm x 10 mm) |
| Product Type | 8-bit CMOS Flash Microcontroller | 8-bit CMOS Flash Microcontroller | 8-bit Flash Microcontroller | 8-bit Flash Microcontroller | 8-bit Flash Microcontroller |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Program Memory | 14KB Flash (8K x 14 words) | 14KB Flash | 14KB Flash | 14KB Flash | 14KB Flash |
| Data Memory | 368 bytes RAM | 368 bytes RAM | 368 bytes RAM | 368 bytes RAM | 368 bytes RAM |
| Digital I/O | 33 I/O | 33 I/O | 33 I/O | 33 I/O | 33 I/O |
主な差別化要因
- Original PIC16F877 compatibility （vs PIC16F887-I/PQ)
- Industrial temperature grade （vs PIC16F877T-20/PQ)
- Verified original-family resource set （vs PIC16F877A-20I/PQ)
- Same-package consolidation without verified cross-brand dependency （vs PIC16F887-I/PQ)
設計ノート
Do not treat the original PIC16F877 and newer PIC16F877A or PIC16F887 devices as firmware-identical parts. Although the supplied sources support a same-family and same-pinout migration discussion, device IDs, peripheral mappings, interrupt vectors, configuration words, and timer registers can change. Build a register-level comparison, preserve a documented bootloader path where possible, and test every peripheral before approving a drop-in migration.
Use the official 44-pin MQFP package drawing for land-pattern and exposed-pad decisions, and verify the exact pin names before routing oscillator, programming, power, ground, and I/O nets. Place decoupling capacitors close to the supply pins, keep the MCLR and programming interface accessible for manufacturing, and route high-current or noisy actuator outputs away from sensitive analog inputs. Do not infer a thermal-pad connection from a generic QFP library symbol.
Supply, decoupling, and brownout selection must be validated against the manufacturer operating limits because the supplied excerpts do not provide VDD ranges or current consumption. Check the maximum VDD plus tolerance, use a regulator with suitable transient response, and include local ceramic decoupling close to the device. If the board exposes an analog input, provide appropriate source impedance and isolation because the ADC's 10-bit resolution alone does not determine measurement accuracy.
Preserve the crystal or resonator layout required by the selected oscillator configuration and keep oscillator routing short and symmetric where applicable. Separate sensitive analog inputs from switching nodes and relay-drive paths, provide a clean analog ground strategy, and avoid routing communications traces beneath potential high-current return paths. The verified excerpts do not identify the exact oscillator pins, so their routing must follow the manufacturer package and application diagrams.
コンプライアンス情報
The verified search results provide device, package, memory, speed, temperature, lifecycle, availability, and price information but do not explicitly extract RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed using the current Microchip product documentation and applicable declarations.
