PIC18C252-I/SP Equivalent & Substitute Parts

Part Overview

The PIC18C252-I/SP is an 8-bit microcontroller from Microchip Technology's PIC® 18C series, featuring 32KB OTP (One-Time Programmable) memory, 40MHz operation, and 22 I/O pins in a 28-SPDIP package. This device is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The transition to active, modern alternatives ensures access to current manufacturing support, improved memory technologies, and enhanced peripheral capabilities.

Substiute Parts

PIC18C252-I/SP

Microchip TechnologyIn Stock: 3224PIC18C252-I/SP Datasheet

Current PartRFQ

PIC18F2520-I/SP

Microchip TechnologyIn Stock: 5000169PIC18F2520-I/SP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC18C252-I/SP is based on the following critical parameters that must remain compatible:

• Core Processor Architecture: PIC processor family
• Core Size: 8-Bit processing capability
• Operating Speed: 40MHz maximum frequency
• Program Memory Capacity: 32KB (16K x 16) minimum
• RAM Size: 1.5K x 8 minimum
• Supply Voltage Range: 4.2V ~ 5.5V compatibility
• Package Type: 28-DIP (0.300", 7.62mm) through-hole mounting
• Operating Temperature Range: -40°C ~ 85°C

The PIC18F2520-I/SP qualifies as a direct substitute because it maintains all critical electrical and mechanical parameters while offering an upgrade from OTP to FLASH memory technology and transitioning from obsolete to active product status.

Parameter Comparison

Engineering Selection Recommendations

The PIC18F2520-I/SP is the qualified substitute for the PIC18C252-I/SP based on the following engineering criteria:

Product Status Alignment: The PIC18F2520-I/SP holds active product status with Microchip Technology, ensuring continued manufacturing support, availability, and technical documentation. The PIC18C252-I/SP is obsolete, creating supply chain risk and limiting access to new inventory.

Compliance and Certifications: Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

Electrical Compatibility: The substitute maintains identical core voltage supply range (4.2V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and clock speed (40MHz), ensuring direct functional compatibility in existing circuit designs.

Memory Technology Upgrade: The transition from OTP to FLASH memory in the PIC18F2520-I/SP provides enhanced flexibility for firmware updates and development cycles without requiring device replacement.

Package and Pinout Compatibility: Both devices utilize the 28-DIP (0.300", 7.62mm) through-hole package with identical pin assignments, enabling direct socket replacement without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F2520-I/SP directly replace the PIC18C252-I/SP in existing designs?

A: Yes. Both devices share identical package geometry (28-DIP), pinout configuration, supply voltage range (4.2V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and clock speed (40MHz). Direct socket replacement is possible without circuit modification.

Q: What are the key differences between these two devices?

A: The primary differences are program memory type (OTP versus FLASH), product status (obsolete versus active), number of I/O pins (22 versus 25), EEPROM availability (none versus 256 x 8), analog-to-digital converter channels (5x10b versus 10x10b), and oscillator type (external versus internal). The PIC18F2520-I/SP offers enhanced capabilities while maintaining core electrical compatibility.

Q: Is the PIC18F2520-I/SP suitable for new product designs?

A: Yes. The PIC18F2520-I/SP holds active product status and meets all current compliance requirements (ROHS3, REACH unaffected). It is the appropriate choice for new designs requiring an 8-bit PIC microcontroller with 32KB program memory and 40MHz operation.

Q: Are there any firmware compatibility considerations?

A: Firmware developed for the PIC18C252-I/SP will require validation on the PIC18F2520-I/SP due to differences in memory type (OTP to FLASH), peripheral count, and internal oscillator availability. Code-level compatibility exists, but testing is necessary to confirm functional equivalence in the target application.

Q: What is the package compatibility status?

A: Both devices use the 28-DIP (0.300", 7.62mm) through-hole package with identical mechanical dimensions and pin spacing. PCB footprints are directly compatible without modification.