PIC18F452-E/P Equivalent & Substitute Parts

Part Overview

The PIC18F452-E/P is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, featuring 32KB FLASH program memory, 1.5KB RAM, and 256 bytes of EEPROM. This device operates at 40MHz with integrated peripherals including I2C, SPI, and UART/USART connectivity, along with analog-to-digital conversion capabilities. The part is currently in active production status with full RoHS3 compliance. Substitute parts are identified when equivalent functional requirements can be met within the allowed electrical and mechanical parameter ranges for this microcontroller category.

Substiute Parts

PIC18F452-E/P

Microchip TechnologyIn Stock: 946PIC18F452-E/P Datasheet

Current PartRFQ

PIC18F4520-E/P

Microchip TechnologyIn Stock: 1119PIC18F4520-E/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PIC18F4520-E/P qualifies as a direct substitute based on the following critical parameters that determine functional compatibility:

• Core Processor & Architecture: Both devices use the PIC core processor with 8-bit architecture
• Program Memory: Both feature 32KB FLASH memory (16K x 16 organization)
• EEPROM & RAM: Identical 256 x 8 EEPROM and 1.5K x 8 RAM configurations
• Voltage Supply Range: Both operate within 4.2V ~ 5.5V supply voltage
• Package & Mounting: Identical 40-DIP through-hole package with matching physical dimensions (0.600", 15.24mm)
• Operating Temperature: Both rated for -40°C ~ 125°C
• Compliance: Both devices maintain ROHS3 compliance and identical regulatory certifications (REACH Unaffected, ECCN 3A991A2, HTSUS 8542.31.0001)

Substitution is valid within these parameter boundaries. Variations in speed, I/O count, and analog converter specifications do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC18F452-E/P and PIC18F4520-E/P are active production devices with identical compliance certifications. Selection between these parts is determined by application-specific requirements:

The PIC18F452-E/P operates at 40MHz maximum clock speed with 8 analog input channels, suitable for applications requiring higher processing speed and standard analog conversion capacity.

The PIC18F4520-E/P operates at 25MHz maximum clock speed with 13 analog input channels and 36 I/O pins versus 34 on the PIC18F452-E/P, suitable for applications prioritizing expanded analog input capability and I/O count over maximum clock frequency.

Both devices share identical memory architecture, voltage supply requirements, package specifications, and regulatory compliance status. Substitution is valid when application timing and analog input requirements align with the selected device's specifications.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F4520-E/P directly replace the PIC18F452-E/P in existing designs?

A: Direct replacement is possible when application requirements do not depend on the 40MHz clock speed of the PIC18F452-E/P. Both devices feature identical program memory (32KB FLASH), RAM (1.5KB), EEPROM (256 bytes), package type (40-DIP), and voltage supply range (4.2V ~ 5.5V). The PIC18F4520-E/P operates at 25MHz maximum frequency and provides additional I/O pins (36 versus 34) and analog input channels (13 versus 8).

Q: Are there pin-to-pin compatibility differences between these parts?

A: Both devices use the 40-DIP package with identical physical dimensions (0.600", 15.24mm). The PIC18F4520-E/P provides 36 I/O pins compared to 34 on the PIC18F452-E/P. PCB layout compatibility depends on whether the design utilizes all available I/O pins on the PIC18F4520-E/P.

Q: Do both parts meet the same compliance and regulatory requirements?

A: Yes. Both the PIC18F452-E/P and PIC18F4520-E/P are ROHS3 compliant, REACH unaffected, and share identical ECCN (3A991A2) and HTSUS (8542.31.0001) classifications. Both devices are in active production status.

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

A: The primary differences are maximum operating frequency (40MHz for PIC18F452-E/P versus 25MHz for PIC18F4520-E/P), number of I/O pins (34 versus 36), and analog input channels (8 versus 13). All other electrical and memory specifications are identical.

Q: Can the PIC18F452-E/P replace the PIC18F4520-E/P?

A: Substitution is valid when application requirements do not depend on the expanded analog input channels (13) or additional I/O pins (36) provided by the PIC18F4520-E/P. The PIC18F452-E/P offers higher maximum clock speed (40MHz) and operates within the same voltage supply range and package specifications.