PIC17C44-33I/P Equivalent & Substitute Parts

Part Overview

The PIC17C44-33I/P is an 8-bit microcontroller from Microchip Technology's PIC® 17C series, featuring 16KB OTP program memory, 454 x 8 bytes of RAM, and 33 I/O pins. Operating at 33MHz with a supply voltage range of 4.5V to 6V, this device is designed for embedded applications requiring OTP-based firmware storage. The part maintains Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching core processor architecture, memory capacity, package form factor, and operational specifications to ensure functional compatibility in system designs.

Substiute Parts

PIC17C44-33I/P

Microchip TechnologyIn Stock: 2416PIC17C44-33I/P Datasheet

Current PartRFQ

PIC18F4420-I/P

Microchip TechnologyIn Stock: 2471PIC18F4420-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC17C44-33I/P is determined by the following critical parameters:

• Core Processor Architecture: PIC processor family compatibility
• Core Size: 8-bit processing capability
• Program Memory Capacity: 16KB minimum requirement
• Package Form Factor: 40-DIP through-hole configuration with 0.600" (15.24mm) body width
• Supply Voltage Compatibility: Operating range overlap with 4.5V to 6V specification
• Operating Temperature Range: -40°C to 85°C ambient temperature support
• Compliance Standards: RoHS3 compliance and REACH unaffected status

The PIC18F4420-I/P qualifies as a substitute based on matching these core parameters while offering enhanced capabilities in program memory type (FLASH vs. OTP), processing speed (40MHz vs. 33MHz), and integrated peripherals.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC17C44-33I/P and PIC18F4420-I/P maintain Active product status with RoHS3 compliance and REACH unaffected designation, ensuring regulatory alignment for current production environments. The PIC18F4420-I/P represents a forward-compatible alternative, offering identical program memory capacity and package form factor while providing increased processing speed, expanded RAM capacity, and FLASH-based program memory for field reprogramming capability. Selection between these devices depends on application requirements for program memory permanence (OTP vs. FLASH) and processing performance headroom.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F4420-I/P directly replace the PIC17C44-33I/P in existing PCB designs?

A: Yes, both devices share identical 40-DIP package dimensions (0.600", 15.24mm) and through-hole mounting configuration, enabling direct socket compatibility. Pin-level compatibility requires verification against specific application schematics.

Q: What is the primary functional difference between these microcontrollers?

A: The PIC17C44-33I/P uses OTP (One-Time Programmable) memory for program storage, while the PIC18F4420-I/P employs FLASH memory, allowing multiple reprogramming cycles without device replacement.

Q: Are there supply voltage considerations when substituting these parts?

A: The PIC17C44-33I/P operates at 4.5V to 6V, while the PIC18F4420-I/P operates at 4.2V to 5.5V. Applications requiring the full 4.5V to 6V range must verify PIC18F4420-I/P compatibility or implement voltage regulation.

Q: Do both devices support the same communication protocols?

A: The PIC17C44-33I/P includes UART/USART connectivity. The PIC18F4420-I/P provides expanded connectivity with I2C, SPI, and UART/USART support, offering additional interface options for system integration.

Q: What compliance certifications apply to both devices?

A: Both devices are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.