PIC16F877AT-I/ML Equivalent & Substitute Parts

Part Overview

The PIC16F877AT-I/ML is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 14KB FLASH program memory, 256 x 8 EEPROM, and 368 x 8 RAM. This device operates at 20MHz with integrated peripherals including I2C, SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The part is housed in a 44-QFN (8x8) surface mount package with 33 I/O pins and supports an operating temperature range of -40°C to 85°C. The PIC16F877AT-I/ML maintains Active product status and is ROHS3 compliant, making it suitable for embedded control applications requiring reliable microcontroller functionality.

Equivalent and substitute parts are identified when design requirements permit component interchange based on matching electrical specifications, memory configurations, package compatibility, and operational parameters.

Substiute Parts

PIC16F877AT-I/ML

Microchip TechnologyIn Stock: 1024PIC16F877AT-I/ML Datasheet

Current PartRFQ

PIC16F877A-I/ML

Microchip TechnologyIn Stock: 1067PIC16F877A-I/ML Datasheet

DirectRFQ

PIC16F887-I/ML

Microchip TechnologyIn Stock: 1645PIC16F887-I/ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F877AT-I/ML is determined by strict alignment across the following critical parameters:

Core Architecture & Memory Configuration: All substitute parts must maintain 8-bit PIC core processor architecture with identical 14KB FLASH program memory (8K x 14), 256 x 8 EEPROM, and 368 x 8 RAM to ensure firmware compatibility and functional equivalence.

Electrical Specifications: Supply voltage range, operating frequency, and data converter specifications must match or exceed the original part's capabilities to maintain circuit performance.

Package & Pinout: All parts must use the 44-QFN (8x8) surface mount package with 44-VQFN Exposed Pad configuration to ensure PCB layout compatibility.

Connectivity & Peripherals: I2C, SPI, and UART/USART interfaces, along with PWM, watchdog timer, and brown-out detection functionality, must be present in substitute parts.

Compliance & Status: Parts must maintain Active product status and ROHS3 compliance to meet current manufacturing and environmental standards.

Parameter Comparison

Engineering Selection Recommendations

PIC16F877A-I/ML: This part is a direct equivalent to the PIC16F877AT-I/ML, matching all critical electrical and memory specifications. Both devices share identical core architecture, memory configuration, I/O count, supply voltage range, and operating temperature specifications. The PIC16F877A-I/ML maintains Active product status and ROHS3 compliance. This part is suitable for direct substitution in applications where the original part is specified.

PIC16F887-I/ML: This part shares the same core architecture, memory configuration, and package as the PIC16F877AT-I/ML but introduces design differences that require evaluation. The PIC16F887-I/ML provides extended supply voltage range (2V ~ 5.5V versus 4V ~ 5.5V), additional I/O pins (35 versus 33), increased analog input channels (14x10b versus 8x10b), and internal oscillator capability. The PIC16F887-I/ML is suitable for applications requiring lower voltage operation or expanded I/O and analog functionality, provided firmware and circuit design accommodate these differences. Product status is Active and ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can PIC16F877A-I/ML replace PIC16F877AT-I/ML in existing designs?

A: Yes. The PIC16F877A-I/ML is a direct equivalent with matching core processor, memory configuration, I/O count, supply voltage range, operating temperature, and package specifications. No circuit or firmware modifications are required.

Q: What are the key differences between PIC16F877AT-I/ML and PIC16F887-I/ML?

A: The PIC16F887-I/ML differs in three areas: (1) supply voltage range extends to 2V minimum versus 4V minimum, (2) I/O pin count is 35 versus 33, and (3) analog input channels increase from 8 to 14. The PIC16F887-I/ML also supports internal oscillator operation, whereas the PIC16F877AT-I/ML requires external oscillator. All other specifications including memory, speed, and package remain identical.

Q: Is the PIC16F887-I/ML a direct substitute for PIC16F877AT-I/ML?

A: The PIC16F887-I/ML is not a direct substitute due to differences in I/O count, analog channels, and oscillator requirements. However, it is functionally compatible for applications that can accommodate the additional I/O and analog capabilities. Firmware and circuit design must be evaluated to confirm compatibility.

Q: Are all substitute parts available in the same packaging?

A: Yes. All listed substitute parts use the 44-QFN (8x8) surface mount package with 44-VQFN Exposed Pad configuration, ensuring PCB layout compatibility.

Q: Do substitute parts maintain the same compliance certifications?

A: Yes. All substitute parts maintain Active product status, ROHS3 compliance, REACH Unaffected status, and identical ECCN and HTSUS classifications as the PIC16F877AT-I/ML.