PIC16F877A-I

8-bit PIC MCU 'A' rev, 14KB Flash, 368B RAM, 256B EEPROM, 8-ch 10-bit ADC, 2 CCP, 2 comparators, SPI/I2C/USART, PSP, ICD, self-program, industrial -40°C~85°C

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PIC16F877A-I

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40-pin PDIP / 44-pin PLCC / 44-pin TQFP / QFN

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Description

Product Overview

The PIC16F877A-I is the enhanced ‘A’ revision of the legendary PIC16F877 40-pin, 8-bit Flash-based CMOS microcontroller from Microchip Technology. Building on the classic design with significant improvements, it features enhanced Flash memory (100K erase/write cycles), self-programming capability, built-in In-Circuit Debug (ICD), and improved electrical characteristics. Offering 14KB (8K x 14 words) of Flash program memory, 368 bytes of RAM, and 256 bytes of data EEPROM (1M cycles), it operates at up to 20 MHz with a 200 ns instruction cycle across an industrial temperature range of -40°C to +85°C. The comprehensive peripheral set includes an 8-channel 10-bit ADC, two analog comparators, two CCP modules, SSP (SPI/I2C), USART, and a Parallel Slave Port (PSP). As one of the most popular 8-bit MCUs ever made, the PIC16F877A remains a benchmark for industrial control, automotive electronics, consumer products, and embedded system education worldwide.

Key Specifications

Core Architecture 8-bit PIC (Mid-Range Core, ‘A’ revision)
Program Memory 14KB Flash (8K x 14 words), 100K E/W cycles
RAM 368 bytes
Data EEPROM 256 bytes, 1M E/W cycles, >40yr retention
Maximum Speed 20 MHz (5 MIPS)
Operating Voltage 2.0V to 5.5V
I/O Pins 33
ADC 10-bit, 8 channels
Comparators 2
Timers 2 x 8-bit (TMR0/TMR2) + 1 x 16-bit (TMR1)
PWM 2 x CCP (Capture/Compare/PWM), 10-bit
Communication SPI, I2C (SSP), USART
Parallel Port PSP (Parallel Slave Port), 8-bit
Debug Built-in In-Circuit Debug (ICD)
Self-Programming Yes (self-write Flash capability)
Oscillator External (RC, XT, HS, LP, EC options)
Stack Levels 8
Operating Temperature -40°C to +85°C (Industrial)
Package 40-pin PDIP / 44-pin PLCC / 44-pin TQFP / QFN

Features

  • Enhanced ‘A’ revision with improved Flash and EEPROM endurance
  • High-performance RISC CPU with only 35 single-word instructions
  • Enhanced Flash: 100,000 erase/write cycles typical
  • Data EEPROM: 256 bytes, 1M cycles, >40 year retention
  • Self-reprogrammable under software control (bootloader support)
  • Built-in In-Circuit Debug (ICD) via two pins
  • 8-channel 10-bit Analog-to-Digital Converter (ADC)
  • Two analog comparators with programmable on-chip voltage reference
  • Two Capture/Compare/PWM (CCP) modules: 16-bit capture, 10-bit PWM
  • Synchronous Serial Port (SSP) with SPI (Master/Slave) and I2C (Master/Slave)
  • Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI)
  • Parallel Slave Port (PSP) with 8-bit wide read/write interface
  • Timer0: 8-bit timer/counter with 8-bit programmable prescaler
  • Timer1: 16-bit timer/counter with prescaler, can increment during Sleep
  • Timer2: 8-bit timer/counter with period register, prescaler, and postscaler
  • Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up Timer (OST)
  • Programmable Brown-out Reset (BOR)
  • Watchdog Timer (WDT) with on-chip RC oscillator
  • In-Circuit Serial Programming (ICSP) via two pins
  • Programmable code protection for program and data memory
  • Power-saving Sleep mode
  • High sink/source current: 25 mA per I/O pin
  • Industrial temperature range: -40°C to +85°C
  • Pinout compatible with PIC16F877 (original)

Applications

  • Industrial control systems and PLCs
  • Automotive electronics and body control modules
  • Consumer electronics and smart appliances
  • Motor control and power management systems
  • Data acquisition and multi-channel sensor monitoring
  • Medical devices and diagnostic equipment
  • Embedded systems education and development platforms

The PIC16F877A-I is the enhanced ‘A’ revision of Microchip’s legendary PIC16F877, widely regarded as one of the most popular 8-bit microcontrollers ever produced. This 40/44-pin Flash-based CMOS MCU features the Mid-Range PIC architecture with significant improvements over the original PIC16F877. Key enhancements include enhanced Flash memory with 100,000 erase/write cycles (vs. 1,000 for the original), self-programming capability enabling firmware updates via bootloader, and built-in In-Circuit Debug (ICD) support that eliminates the need for external debug headers. It offers 14KB (8K x 14 words) of Flash program memory, 368 bytes of RAM, and 256 bytes of data EEPROM with 1M erase/write cycles and >40 year data retention. Operating at up to 20 MHz (5 MIPS) across industrial temperature range (-40°C to +85°C), the peripheral set includes an 8-channel 10-bit ADC, two analog comparators with programmable voltage reference, two CCP modules, an SSP module for SPI/I2C (both Master and Slave modes with address masking), a USART for serial communication, and a Parallel Slave Port (PSP) for 8-bit parallel interface. Three timer modules (TMR0, TMR1, TMR2) provide flexible timing and PWM generation. With 33 I/O pins, programmable Brown-out Reset, Watchdog Timer, and code protection, the PIC16F877A is the industry-standard 8-bit MCU for industrial, automotive, consumer, medical, and educational applications.

The PIC16F877A-I operates on the Mid-Range PIC RISC architecture with Harvard design, providing separate 14-bit program memory and 8-bit data memory buses for concurrent access. The ‘A’ revision introduces enhanced Flash technology with 100x higher endurance (100K vs. 1K cycles) and self-programming capability via special Flash control registers, enabling the MCU to update its own program memory under software control – essential for bootloader and field-upgrade applications. The built-in ICD module allows real-time in-circuit debugging through the same two pins used for ICSP programming, significantly reducing development cost and complexity. The 10-bit ADC uses successive approximation register (SAR) architecture with 8 input channels and selectable voltage references. Two analog comparators with Comparator Voltage Reference (CVREF) enable threshold detection and window comparison. Two CCP modules provide 16-bit capture (12.5 ns resolution at 20 MHz), 16-bit compare, and up to 10-bit PWM resolution for motor control and power regulation. The SSP module handles both SPI and I2C (Master/Slave with 7-bit address masking and SMBus/PMBus compatibility) in hardware. The USART provides asynchronous RS-232 compatible and synchronous serial communication. The Parallel Slave Port (PSP) is an 8-bit bidirectional parallel interface for high-speed data transfer with external microprocessors. The 256 bytes of EEPROM provide high-endurance non-volatile storage. Power management includes Sleep mode, programmable Brown-out Reset, and Watchdog Timer with independent RC oscillator for reliable operation in industrial environments.

Pin (PDIP-40) Name Type Function
1 MCLR/VPP/RE3 I/P Master Clear / Programming Voltage / Port E I/O
2 RA0/AN0 I/O Port A I/O / ADC Channel 0
3 RA1/AN1 I/O Port A I/O / ADC Channel 1
4 RA2/AN2/VREF-/CVREF I/O Port A I/O / ADC Ch2 / Vref Neg / Comp Vref
5 RA3/AN3/VREF+ I/O Port A I/O / ADC Ch3 / Vref Positive
6 RA4/T0CKI I/O Port A I/O / Timer0 Clock Input
7 RA5/SS/AN4 I/O Port A I/O / SPI Slave Select / ADC Ch4
8 RE0/RD/AN5 I/O Port E I/O / PSP Read / ADC Ch5
9 RE1/WR/AN6 I/O Port E I/O / PSP Write / ADC Ch6
10 RE2/CS/AN7 I/O Port E I/O / PSP Chip Select / ADC Ch7
11 VSS P Ground Reference
12 RD0/PSP0 I/O Port D I/O / Parallel Slave Port Bit 0
13 RD1/PSP1 I/O Port D I/O / Parallel Slave Port Bit 1
14 RD2/PSP2 I/O Port D I/O / Parallel Slave Port Bit 2
15 RD3/PSP3 I/O Port D I/O / Parallel Slave Port Bit 3
16 RC0/T1OSO/T1CKI I/O Port C I/O / T1OSO / Timer1 Clock
17 RC1/T1OSI/CCP2 I/O Port C I/O / T1OSI / CCP2
18 RC2/CCP1 I/O Port C I/O / CCP1
19 RC3/SCK/SCL I/O Port C I/O / SPI Clock / I2C Clock
20 RD4/PSP4 I/O Port D I/O / Parallel Slave Port Bit 4
21 RD5/PSP5 I/O Port D I/O / Parallel Slave Port Bit 5
22 RD6/PSP6 I/O Port D I/O / Parallel Slave Port Bit 6
23 RD7/PSP7 I/O Port D I/O / Parallel Slave Port Bit 7
24 RC4/SDI/SDA I/O Port C I/O / SPI Data In / I2C Data
25 RC5/SDO I/O Port C I/O / SPI Data Out
26 RC6/TX/CK I/O Port C I/O / USART TX/Clock
27 RC7/RX/DT I/O Port C I/O / USART RX/Data
28 VSS P Ground Reference
29 VDD P Positive Supply Voltage
30 RB0/INT I/O Port B I/O / External Interrupt
31 RB1/C12IN0- I/O Port B I/O / Comparator Negative Input 0
32 RB2/C12IN1- I/O Port B I/O / Comparator Negative Input 1
33 RB3/PGM/C2OUT I/O Port B I/O / LVP / Comparator2 Output
34 RB4/C1OUT I/O Port B I/O / Comparator1 Output
35 RB5 I/O Port B I/O
36 RB6/ICSPCLK I/O Port B I/O / ICSP Clock
37 RB7/ICSPDAT I/O Port B I/O / ICSP Data
38 OSC1/CLKIN I Oscillator Input / Clock Input
39 OSC2/CLKOUT O Oscillator Output / Clock Output
40 VDD P Positive Supply Voltage
  • Industrial PLCs and factory automation controllers
  • Automotive electronics and body control modules
  • Smart home appliances and consumer electronics
  • Motor control drives and power inverters
  • Multi-channel data acquisition and monitoring systems
  • Medical instrumentation and diagnostic equipment
  • Embedded education platforms and development kits
Manufacturer Part Number Package Notes
Microchip PIC16F877-20I 40-pin Original non-A version, no ICD/self-program
Microchip PIC16F876A-I 28-pin Same features, 28-pin, 5-ch ADC, no PSP
Microchip PIC16F874A-I 40-pin 7KB Flash, 192B RAM, same peripherals
Microchip PIC16F887-I 40-pin Internal oscillator, ECCP, enhanced peripherals
Microchip PIC16F1789-I 44-pin Newer generation, 28KB Flash, enhanced analog
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
  • Automotive Electronics: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
  • Medical Devices: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
  • Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.

4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

1. Payment Terms

We offer a variety of secure and convenient payment methods to meet diverse business cooperation needs. Details are as follows:
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  1. Settlement Currency

     

    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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    All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.

  3. Payment Requirements
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  • Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
  1. Shipment Tracking
     

    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

  2. Packaging Standard

     

    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

4. Customs & Liability Statement

  1. Import Duties & Taxes

     

    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
  • In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
  • We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.

5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

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3. Fast Quotation & Order Processing

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4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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