PIC16F874-04I/PQ Equivalent & Substitute Parts

Part Overview

The PIC16F874-04I/PQ is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring moderate processing capability and integrated peripherals. This device operates at 4MHz with 7KB of FLASH program memory and is housed in a 44-MQFP surface mount package. The part maintains Active product status and is RoHS3 compliant.

Substitute parts are identified when design requirements allow for enhanced specifications while maintaining core functional compatibility within the PIC® 16F architecture and pin-compatible packaging standards.

Substiute Parts

PIC16F874-04I/PQ

Microchip TechnologyIn Stock: 1000110PIC16F874-04I/PQ Datasheet

Current PartRFQ

PIC16F884-I/PT

Microchip TechnologyIn Stock: 18322PIC16F884-I/PT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F874-04I/PQ is determined by the following criteria:

Core Architecture Compatibility: The substitute must be a PIC® 16F series microcontroller with 8-bit core architecture and FLASH program memory.

Memory Configuration: Program memory size must remain at 7KB (4K x 14) to ensure firmware compatibility and code space equivalence.

Package Compatibility: The substitute must use a 44-pin QFP-class package (44-MQFP or 44-TQFP) to maintain PCB layout compatibility.

Operating Conditions: The substitute must support the required operating temperature range of -40°C to 85°C and maintain compliance with RoHS3 and REACH standards.

Enhanced Specifications Allowed: Substitutes may feature improved specifications including higher clock speed, expanded I/O count, increased EEPROM/RAM capacity, and extended voltage supply range, provided the core requirements above are met.

The PIC16F884-I/PT qualifies as a substitute based on these criteria, offering enhanced performance characteristics while maintaining architectural and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

PIC16F874-04I/PQ Selection: Choose this part when the application requires external oscillator configuration and operates within the 4V to 5.5V supply range. This device is suitable for cost-optimized designs where the 4MHz clock speed and 33 I/O pins meet functional requirements.

PIC16F884-I/PT Selection: This substitute is recommended when the application benefits from higher clock speed (20MHz), extended voltage supply range (2V to 5.5V), increased I/O count (35 pins), or internal oscillator capability. The PIC16F884-I/PT provides enhanced memory resources (256 x 8 EEPROM and RAM versus 128 x 8 and 192 x 8) and additional analog input channels (14 versus 8).

Both parts maintain Active product status, RoHS3 compliance, and identical operating temperature specifications, ensuring long-term availability and regulatory consistency.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F884-I/PT directly replace the PIC16F874-04I/PQ on an existing PCB?

A: Pin-level compatibility exists between the 44-MQFP and 44-TQFP packages for the PIC® 16F series. However, physical package dimensions differ slightly. Verify PCB footprint compatibility before substitution. Both packages are 44-pin QFP variants with 10x10mm body dimensions but different lead configurations.

Q: What are the key differences in memory configuration?

A: The PIC16F884-I/PT provides doubled EEPROM capacity (256 x 8 versus 128 x 8) and increased RAM (256 x 8 versus 192 x 8). Program memory remains equivalent at 7KB (4K x 14) for both devices.

Q: Does the PIC16F884-I/PT require firmware modifications?

A: Core instruction set compatibility is maintained within the PIC® 16F architecture. Firmware written for the PIC16F874-04I/PQ will execute on the PIC16F884-I/PT. However, applications utilizing external oscillator configuration on the original part may require modification to leverage the internal oscillator option available on the substitute.

Q: What is the impact of the 20MHz versus 4MHz clock speed difference?

A: The PIC16F884-I/PT operates at 5x the clock frequency, enabling faster instruction execution and improved real-time responsiveness. Applications designed for 4MHz operation will function correctly at 20MHz without modification, though power consumption will increase proportionally.

Q: Are there voltage supply considerations for substitution?

A: The PIC16F874-04I/PQ requires 4V to 5.5V supply. The PIC16F884-I/PT extends the lower limit to 2V, enabling operation in low-power applications. Existing 5V designs require no modification; designs operating below 4V must use the substitute.

Q: How do the analog input specifications compare?

A: The PIC16F874-04I/PQ provides 8 channels of 10-bit analog-to-digital conversion. The PIC16F884-I/PT provides 14 channels of 10-bit conversion, offering expanded analog sensing capability for applications requiring multiple sensor inputs.