PIC16F877-04I/PQ Equivalent & Substitute Parts

Part Overview

The PIC16F877-04I/PQ is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 14KB FLASH program memory and operating at 4MHz. This device is actively produced and widely used in embedded control applications requiring moderate processing speed and integrated peripherals including I2C, SPI, and UART/USART connectivity. Substitute parts are identified when design requirements allow for enhanced specifications while maintaining core functional compatibility within the PIC® 16F architecture.

Substiute Parts

PIC16F877-04I/PQ

Microchip TechnologyIn Stock: 2474PIC16F877-04I/PQ Datasheet

Current PartRFQ

PIC16F887-I/PT

Microchip TechnologyIn Stock: 25349PIC16F887-I/PT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The PIC16F887-I/PT qualifies as a substitute for the PIC16F877-04I/PQ based on the following substitution criteria:

Compatible Parameters:

• Same core processor architecture (PIC 8-Bit)
• Identical program memory capacity (14KB FLASH)
• Identical EEPROM size (256 x 8)
• Identical RAM size (368 x 8)
• Same connectivity suite (I2C, SPI, UART/USART)
• Identical peripheral set (Brown-out Detect/Reset, POR, PWM, WDT)
• Same operating temperature range (-40°C ~ 85°C)
• Same RoHS3 compliance status
• Same base product series (PIC® 16F)
• Active product status

Enhanced Specifications:

• Higher operating speed (20MHz vs. 4MHz)
• Wider voltage supply range (2V ~ 5.5V vs. 4V ~ 5.5V)
• Increased I/O count (35 vs. 33)
• Enhanced analog-to-digital converter (14x10b vs. 8x10b)
• Internal oscillator capability (vs. external oscillator requirement)
• Different package variant (44-TQFP vs. 44-MQFP)

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16F877-04I/PQ and PIC16F887-I/PT maintain Active product status from Microchip Technology and comply with ROHS3 standards. The PIC16F887-I/PT represents an enhanced variant within the same architectural family, offering higher processing speed and expanded I/O capability without reducing memory specifications. Selection between these devices depends on application-specific speed requirements and I/O pin availability. The PIC16F887-I/PT's internal oscillator capability and extended voltage supply range provide additional design flexibility. Package differences (44-MQFP vs. 44-TQFP) require PCB layout verification for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F887-I/PT directly replace the PIC16F877-04I/PQ in existing designs?

A: Direct replacement requires verification of package compatibility. The PIC16F877-04I/PQ uses 44-MQFP packaging while the PIC16F887-I/PT uses 44-TQFP packaging. Both are 44-pin QFP variants with 10x10mm footprints, but PCB layout confirmation is necessary. The enhanced speed and I/O specifications of the PIC16F887-I/PT are backward compatible with applications designed for the PIC16F877-04I/PQ.

Q: What are the key differences in memory architecture?

A: Both devices feature identical memory configurations: 14KB FLASH program memory, 256 x 8 EEPROM, and 368 x 8 RAM. Memory architecture substitution is direct.

Q: How do the analog-to-digital converter specifications differ?

A: The PIC16F877-04I/PQ provides 8 channels of 10-bit A/D conversion. The PIC16F887-I/PT provides 14 channels of 10-bit A/D conversion, offering expanded analog input capability.

Q: Are there voltage supply considerations for substitution?

A: The PIC16F877-04I/PQ operates within 4V ~ 5.5V. The PIC16F887-I/PT operates within 2V ~ 5.5V, providing wider low-voltage operation capability. Applications designed for the narrower voltage range of the PIC16F877-04I/PQ remain compatible with the PIC16F887-I/PT.

Q: What is the significance of internal versus external oscillator capability?

A: The PIC16F877-04I/PQ requires an external oscillator. The PIC16F887-I/PT supports internal oscillator operation, reducing external component requirements and PCB area in designs where internal oscillation meets timing specifications.

Q: How do I/O pin counts affect substitution?

A: The PIC16F877-04I/PQ provides 33 I/O pins. The PIC16F887-I/PT provides 35 I/O pins. Applications utilizing fewer than 33 pins are fully compatible. Designs requiring all 33 pins of the original device remain functional with the additional 2 pins available on the substitute.