PIC16F871-E/PT Equivalent & Substitute Parts

Part Overview

The PIC16F871-E/PT is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 4.6KB FLASH program memory, 128 bytes of RAM, and 64 bytes of EEPROM. This device integrates UART/USART connectivity, PWM, watchdog timer, and brown-out detection in a 44-TQFP surface mount package. The PIC16F871-E/PT is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Direct substitutes maintain identical core functionality while offering improved availability and current product status.

Substiute Parts

PIC16F871-E/PT

Microchip TechnologyIn Stock: 842PIC16F871-E/PT Datasheet

Current PartRFQ

PIC16F871-I/PT

Microchip TechnologyIn Stock: 2327PIC16F871-I/PT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16F871-E/PT is based on strict equivalence of core electrical and mechanical parameters. The primary substitute, PIC16F871-I/PT, maintains identical specifications across all critical functional parameters: 8-bit core architecture, 20MHz operation, 4.6KB FLASH memory, 128 bytes RAM, 64 bytes EEPROM, 33 I/O pins, UART/USART connectivity, and 44-TQFP package geometry.

The substitution logic is determined by the following key parameters:

• Identical core processor architecture (PIC 8-bit)
• Matching program memory capacity and type (4.6KB FLASH)
• Equivalent data memory configuration (128 x 8 RAM, 64 x 8 EEPROM)
• Same peripheral feature set (PWM, WDT, brown-out detection, POR)
• Identical package footprint (44-TQFP 10x10)
• Compatible voltage supply range (4V ~ 5.5V)
• Matching I/O count (33 pins)

The primary difference between the main part and substitute is the operating temperature range and product status, which do not affect functional substitution in applications operating within the substitute's temperature specification.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F871-I/PT is the direct functional equivalent for the obsolete PIC16F871-E/PT. Both devices are ROHS3 compliant and carry identical MSL ratings, ensuring compatibility in environmentally regulated applications. The substitute part is currently in active production status, providing superior supply chain availability compared to the obsolete main part number.

The operating temperature range of the PIC16F871-I/PT (-40°C ~ 85°C) is narrower than the main part (-40°C ~ 125°C). Applications requiring operation above 85°C must retain the original PIC16F871-E/PT specification or identify alternative device families with extended temperature ratings.

For applications operating within the -40°C ~ 85°C range, the PIC16F871-I/PT provides direct substitution with no design modifications required. The identical package footprint, pin configuration, memory architecture, and peripheral feature set ensure drop-in compatibility at the board level and firmware level.

Frequently Asked Questions (FAQ)

Q: Can PIC16F871-I/PT replace PIC16F871-E/PT in all applications?

A: The PIC16F871-I/PT is functionally equivalent for applications operating within -40°C ~ 85°C. Applications requiring operation above 85°C must use the original part number or alternative devices rated for extended temperature ranges.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use identical 44-TQFP (10x10) surface mount packages with 33 I/O pins in the same configuration. No PCB redesign is required.

Q: What is the difference between the -E and -I temperature grades?

A: The -E grade operates from -40°C ~ 125°C, while the -I grade operates from -40°C ~ 85°C. The -I grade is the standard industrial temperature range. Select based on your application's thermal requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both PIC16F871-E/PT and PIC16F871-I/PT are ROHS3 compliant with identical MSL ratings of 3 (168 Hours).

Q: Why is the main part listed as obsolete?

A: The PIC16F871-E/PT has been discontinued by Microchip Technology. The PIC16F871-I/PT remains in active production and is the recommended replacement for new designs and ongoing production support.

Q: Do these parts require different programming or firmware?

A: No. Both parts share identical core architecture, memory configuration, and peripheral features. Existing firmware requires no modification for substitution.