PIC17C44-25I/P Equivalent & Substitute Parts

Part Overview

The PIC17C44-25I/P is an 8-bit microcontroller from Microchip Technology's PIC® 17C series, featuring 16KB OTP program memory and operating at 25MHz. This device is classified as Active product status and is suitable for embedded applications requiring OTP-based firmware storage. Substitute parts are identified when equivalent functional requirements can be met through alternative microcontroller models that maintain compatibility in core processor architecture, memory capacity, I/O count, and package form factor while potentially offering enhanced features or different memory technologies.

Substiute Parts

PIC17C44-25I/P

Microchip TechnologyIn Stock: 3508PIC17C44-25I/P Datasheet

Current PartRFQ

PIC18F4420-I/P

Microchip TechnologyIn Stock: 2471PIC18F4420-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC17C44-25I/P is determined by the following critical parameters:

• Core processor family (PIC architecture)
• Program memory capacity (16KB minimum)
• Package form factor (40-DIP)
• Mounting type (Through Hole)
• Operating temperature range (-40°C ~ 85°C)
• Supply voltage compatibility (4.5V ~ 6V range overlap)
• I/O pin count (33 or greater)

The PIC18F4420-I/P qualifies as a substitute based on these criteria. While it operates at a higher speed (40MHz versus 25MHz) and uses FLASH memory instead of OTP, it maintains the same 16KB program memory capacity, 40-DIP package, through-hole mounting, and compatible operating parameters. The enhanced I/O count (36 versus 33) and additional peripherals represent functional improvements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC17C44-25I/P and PIC18F4420-I/P maintain Active product status from Microchip Technology and are ROHS3 compliant. The PIC18F4420-I/P represents a functionally enhanced alternative within the same package footprint. Selection between these devices should be based on application-specific requirements regarding processing speed, memory technology (OTP versus FLASH), and I/O requirements. The PIC18F4420-I/P's higher clock speed and additional I/O pins provide expanded capability for applications requiring increased performance headroom. Both devices operate within overlapping supply voltage ranges and identical temperature specifications, supporting direct substitution in through-hole PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F4420-I/P directly replace the PIC17C44-25I/P in existing PCB designs?

A: Yes. Both devices use identical 40-DIP package geometry (0.600", 15.24mm) and through-hole mounting, enabling direct pin-for-pin substitution on existing circuit boards without PCB modification.

Q: What is the primary difference between OTP and FLASH memory in these microcontrollers?

A: OTP (One-Time Programmable) memory in the PIC17C44-25I/P allows single programming during manufacturing. FLASH memory in the PIC18F4420-I/P permits multiple erase and reprogram cycles, supporting field updates and development flexibility.

Q: Are the supply voltage ranges compatible?

A: The PIC17C44-25I/P operates at 4.5V ~ 6V, while the PIC18F4420-I/P operates at 4.2V ~ 5.5V. The overlap range of 4.5V ~ 5.5V supports both devices, though designs operating above 5.5V require the PIC17C44-25I/P.

Q: Does the higher speed of the PIC18F4420-I/P affect compatibility?

A: The 40MHz speed of the PIC18F4420-I/P versus 25MHz of the PIC17C44-25I/P represents enhanced performance capability. Applications designed for 25MHz operation function correctly at 40MHz without modification, though timing-dependent code may require adjustment.

Q: How do the I/O pin counts compare?

A: The PIC17C44-25I/P provides 33 I/O pins, while the PIC18F4420-I/P provides 36 I/O pins. Both fit within the 40-DIP package, with the additional pins in the PIC18F4420-I/P available for expanded application functionality.

Q: Are both devices suitable for industrial temperature applications?

A: Yes. Both devices operate across the -40°C ~ 85°C temperature range, meeting industrial and extended commercial application requirements.