PIC16F877-04I/PT - 8-bit 4MHz MCU 14KB Flash 44-TQFP | Microchip
部品番号: PIC16F877-04I/PT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $7.8 | $7.80 |
| 10 | $7.1 | $71.00 |
| 100 | $6.2 | $620.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.95 | $4,950.00 |
PIC16F877-04I/PT 概要
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals such as timers, communication interfaces, and analog-to-digital converters. The PIC16F877 belongs to the mid-range PIC16 family, sitting within the broader taxonomy of 8-bit microcontrollers -> microcontrollers -> embedded processors -> semiconductors. It is widely regarded as one of the most popular learning and prototyping MCUs in the industry, with a 35-instruction RISC core that simplifies code development and debugging.
Key features include 33 digital I/O pins, an 8-channel 10-bit Analog-to-Digital Converter (ADC), two 8-bit timers plus one 16-bit timer, a Watchdog Timer, and both synchronous and asynchronous serial ports configurable as SPI or I2C, plus a USART. The device operates from 2.0V to 5.5V across an industrial -40C to +85C temperature range, and supports In-Circuit Serial Programming (ICSP) plus In-Circuit Debugging (ICD) via dedicated pins.
Architecturally, the PIC16F877 employs a Harvard architecture with separate program and data buses, allowing instruction fetch and data access to occur in the same clock cycle. The 14-bit instruction word and 8-bit data path are characteristic of the mid-range PIC16 core, and Microchip provides a mature MPLAB X IDE and XC8 toolchain for firmware development. The 'I' suffix denotes the industrial temperature grade.
Typical applications include industrial control and automation nodes, sensor interface front-ends, educational development boards, low-end data loggers, motor control signal conditioning, and standalone instrumentation. It is also commonly used as a peripheral co-processor in designs where a host processor offloads real-time I/O tasks. The wide operating voltage range allows direct interfacing to 3.3V and 5V system buses with level-shifting minimized by careful pin-group configuration.
When designing with the PIC16F877, ensure the MCLR reset pin is properly biased with the recommended pull-up and decoupling, and that the oscillator configuration bits match the selected crystal or external clock. Because the device's FLASH endurance is typically 1000 erase/write cycles minimum, design code should minimize EEPROM wear through wear-leveling techniques. Adding series resistance on the ICSP/ICD lines helps prevent programming-port damage during in-circuit debugging.
This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, drop-in and same-footprint alternatives, and practical design notes not consolidated in the manufacturer datasheet.
ドロップイン代替品: PIC16F877-04I/PT — 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: PIC16F877-04I/PT （同一形状・フットプリント） — 相違点: Operating Temperature, Timers, ADC, Core Architecture, Package.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16F877A-I/PT
✅ ドロップイン✓ 在庫あり
$4.95 / 個
データシートを見る →PIC16F877-04/PT
✅ ドロップイン✓ 在庫あり
$5.2 / 個
データシートを見る →PIC16F877-20/PT
✅ ドロップイン✓ 在庫あり
$6.72 / 個
データシートを見る →PIC16F877-04I/P
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.95 / 個
データシートを見る →PIC16F877-04E/PT
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$3.25 / 個
データシートを見る →PIC16F887-I/PT
✅ ドロップイン✓ 在庫あり
$1.66 / 個
データシートを見る →PIC16F877-04I/PT 最大定格＆電気的特性
| Core Architecture | PIC 8-bit RISC, mid-range |
| Instruction Set | 35 single-word instructions, 14-bit instruction word |
| Program Memory (FLASH) | 14 KB (8K x 14 words) |
| Data SRAM | 368 bytes |
| Data EEPROM | 256 bytes |
| 最大クロック周波数 | 4 MHz (4 MHz part, -04 speed grade) |
| Instruction Throughput | 4 MIPS at 4 MHz (1 us/instruction) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Digital I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Timers | 2x 8-bit + 1x 16-bit + Watchdog Timer |
| CCP Modules | 2 (Capture / Compare / PWM) |
| Serial Interfaces | SSP (SPI / I2C) + USART |
| 動作温度 | -40C to +85C (industrial, 'I' grade) |
| パッケージ | 44-pin TQFP (PT) 10x10 mm |
| Programming/Debug | ICSP + ICD (In-Circuit Serial Programming + Debug) |
| 実装タイプ | Surface Mount |
PIC16F877-04I/PT ピン構成
| ピン 1 | MCLR — Master Clear (reset) input, active low |
| ピン 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| ピン 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| ピン 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| ピン 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| ピン 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| ピン 8 | RE0/RD/AN5 — PORTE bit 0 / Read control for parallel slave port / Analog input 5 |
| ピン 9 | RE1/WR/AN6 — PORTE bit 1 / Write control for parallel slave port / Analog input 6 |
| ピン 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select for parallel slave port / Analog input 7 |
| ピン 11 | VDD — Positive supply voltage (+2.0V to +5.5V) |
| ピン 12 | VSS — Ground reference |
| ピン 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| ピン 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| ピン 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| ピン 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 input/output |
| ピン 17 | RC2/CCP1 — PORTC bit 2 / CCP1 input/output |
| ピン 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| ピン 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| ピン 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| ピン 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| ピン 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| ピン 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| ピン 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| ピン 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| ピン 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| ピン 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| ピン 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| ピン 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| ピン 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| ピン 31 | VSS — Ground reference |
| ピン 32 | VDD — Positive supply voltage (+2.0V to +5.5V) |
| ピン 33 | RB0/INT — PORTB bit 0 / External interrupt input |
| ピン 34 | RB1 — PORTB bit 1 |
| ピン 35 | RB2 — PORTB bit 2 |
| ピン 36 | RB3/PGM — PORTB bit 3 / Low-voltage ICSP programming input |
| ピン 37 | RB4 — PORTB bit 4 |
| ピン 38 | RB5 — PORTB bit 5 |
| ピン 39 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| ピン 40 | RB7/PGD — PORTB bit 7 / ICSP data input/output |
| ピン 41 | VSS — Ground reference |
| ピン 42 | VDD — Positive supply voltage (+2.0V to +5.5V) |
| ピン 43 | VSS — Ground reference |
| ピン 44 | VDD — Positive supply voltage (+2.0V to +5.5V) |
主な用途
PIC16F877-04I/PT の用途: 7 件s: Industrial Sensor Interface Node, Educational Development Board / Trainer, Standalone Data Logger Front-End, Low-Speed PWM Motor / LED Driver, Peripheral Co-Processor for Host CPU, Automotive Body Electronics (Non-Safety), Appliance Control Module.
Industrial Sensor Interface Node
The PIC16F877-04I/PT is well suited as a sensor interface node in industrial control systems: its 8-channel 10-bit ADC handles multiple analog inputs (temperature, pressure, light) while the SPI/I2C/USART peripherals forward data to a host controller or networked sensor bus. The 4 MHz clock is sufficient for moderate sampling rates up to ~50 kHz aggregate, and the 33 I/O pins drive status LEDs, optocouplers, and relay drivers directly. Industrial -40C to +85C temperature range ensures operation in factory cabinets without derating.
おすすめ
Educational Development Board / Trainer
The PIC16F877-04I/PT has been a mainstay of university microcontroller courses and hobby projects for over two decades, due to its simple 35-instruction RISC core, abundant 14 KB FLASH, and free Microchip MPLAB X + XC8 toolchain. It is the brain of countless trainer boards that include LEDs, push buttons, an LCD, a potentiometer on the ADC, and an ICSP header for in-circuit programming. The 4 MHz part (-04 grade) is the canonical speed for textbook examples and emulator-friendly timing.
おすすめ
Standalone Data Logger Front-End
With 256 bytes of EEPROM, the PIC16F877-04I/PT can buffer timestamped sensor readings before offloading to non-volatile media via SPI (e.g., to an external EEPROM or SD card). The 10-bit ADC is adequate for environmental monitoring (humidity, light, thermistor channels), and the Watchdog Timer guards against firmware lockup in unattended deployments. The 2.0V-5.5V operating range allows direct battery or solar-power supply with no additional regulator at modest duty cycles.
おすすめ
Low-Speed PWM Motor / LED Driver
The two CCP modules of the PIC16F877-04I/PT generate PWM signals for brushed DC motor speed control, fan speed, or LED dimming, while 25 mA source/sink on I/O pins drives small MOSFETs directly. At 4 MHz (250 ns instruction cycle, 1 us/instruction), PWM frequencies up to ~10 kHz with 8-10 bit resolution are easily achievable with proper timer setup. The 33 I/O pins support multiple motor channels and quadrature encoder feedback inputs.
おすすめ
Peripheral Co-Processor for Host CPU
In systems with a high-end host processor (e.g., ARM Cortex-A), the PIC16F877-04I/PT acts as a low-cost co-processor handling real-time I/O housekeeping: keypad scanning, character LCD driving, push-button debouncing, and discrete control outputs. The USART/I2C/SPI ports give it flexible connectivity to the host, and the 14 KB FLASH holds substantial lookup tables and state machines. This offloads interrupt-heavy chores from the host CPU.
おすすめ
Automotive Body Electronics (Non-Safety)
Although not AEC-Q100 qualified, the PIC16F877-04I/PT is used in hobby and aftermarket automotive body-electronics applications such as auxiliary lighting controllers, HVAC flaps, gauge displays, and CAN node prototyping (paired with an MCP2515 stand-alone CAN controller and MCP2551 transceiver). Its industrial -40C to +85C range tolerates cabin-temperature operation, and its small 44-pin TQFP package fits behind dashboard trim spaces. Production safety-relevant functions should migrate to AEC-Q100 qualified dsPIC or PIC18 parts.
おすすめ
Appliance Control Module
The PIC16F877-04I/PT fits home appliance controllers for washing machines, microwaves, and air conditioners where 33 I/O pins drive multiplexed 7-segment displays, keypads, triac-fired loads, and triac zero-cross detection circuits. The 10-bit ADC reads temperature, humidity, and current-sensing shunts. The robust PIC instruction set supports complex state machines for sequencing wash cycles, cooking profiles, or HVAC modes while the 2.0V-5.5V range tolerates rectified mains-derived supplies.
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: PIC16F877-04I/PT — 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 | PIC16F877A-I/PT | PIC16F877-04/PT | PIC16F887-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same |
| Max Clock Frequency | 4 MHz | 20 MHz (+400%) | 4 MHz (same) | 20 MHz (+400%) |
| FLASH Program Memory | 14 KB | 14 KB (same) | 14 KB (same) | 14 KB (same) |
| Data SRAM | 368 bytes | 368 bytes (same) | 368 bytes (same) | 368 bytes (same) |
| Data EEPROM | 256 bytes | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) |
| Digital I/O Pins | 33 | 33 (same) | 33 (same) | 36 (+9%) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Supply Voltage | 2.0V to 5.5V | 2.0V to 5.5V (same) | 2.0V to 5.5V (same) | 2.0V to 5.5V (same) |
主な差別化要因
- Mature, well-documented RISC core with abundant third-party learning resources （vs PIC16F887-I/PT)
- Industrial temperature grade with proven long-term supply （vs PIC16F877-04/PT (commercial 0C to +70C))
- Standard 4 MHz speed grade aligns with classic textbook timing （vs PIC16F877A-I/PT (20 MHz))
設計ノート
Decouple each VDD pin (11, 32, 42, 44) with a 100 nF ceramic capacitor placed within 5 mm of the pin to a nearby VSS pin. For noise-sensitive analog measurements, add a bulk 10 uF electrolytic capacitor to the supply rail and a ferrite bead if the rail is shared with digital loads. The PIC16F877-04I/PT draws typical supply current of ~5-15 mA active at 4 MHz, but the analog VREF+ and ADC block benefit from a clean reference - apply a dedicated LDO if the system rail is noisy.
Configure the ADCON1 register to set which PORTA/PORTE pins are analog (default after reset is all analog on PORTA, blocking digital I/O). Always specify configuration bits (FOSC, WDTE, PWRTE, BOREN, LVP, CPD, CP, etc.) explicitly in code - using the MPLAB X default config can accidentally enable Low-Voltage Programming (LVP) and leave PORTB unavailable as general I/O. Brown-Out Reset should be enabled in most line-powered designs to prevent undefined behavior during supply dips.
The MCLR pin is sensitive to noise; route the reset circuit (typically 10k pull-up to VDD and a 100 nF to ground) close to the pin. For ICSP programming, place series resistors (typically 10k) on PGC/PGD (RB6/RB7) to allow programming without removing components from the production PCB. Keep the ICSP connector at the board edge to allow probe access without disassembly.
The PIC16F877-04I/PT in the 44-pin TQFP (10x10 mm) package has a thermal resistance theta_JA around 50-60 C/W depending on PCB copper area. At 4 MHz the device typically consumes under 50 mW, so active thermal management is rarely required. However, in sealed enclosures or with output pins sourcing/sinking maximum current (25 mA per pin, 200 mA total package limit), power dissipation can rise and a small copper pour for thermal spreading is recommended.
コンプライアンス情報
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this part is intended for industrial, consumer, and educational use, not automotive safety applications. Lead-free packaging per Microchip standard since Pb-free transition.