PIC18F452T-I/L Equivalent & Substitute Parts

Part Overview

The PIC18F452T-I/L is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, currently in active production status. This device integrates 32KB FLASH program memory, 1.5KB RAM, and 256 bytes EEPROM with a 40MHz core processor. The 44-PLCC package provides 34 I/O pins and includes integrated peripherals for embedded control applications. Substitute parts are identified when equivalent functional specifications and electrical parameters are available from the same manufacturer, enabling design flexibility and supply chain optimization.

Substiute Parts

PIC18F452T-I/L

Microchip TechnologyIn Stock: 3293PIC18F452T-I/L Datasheet

Current PartRFQ

PIC18F4520T-I/PT

Microchip TechnologyIn Stock: 5000111PIC18F4520T-I/PT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC18F452T-I/L is determined by the following critical parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Program memory capacity (32KB FLASH)
• RAM capacity (1.5K x 8)
• EEPROM capacity (256 x 8)
• Operating speed (40MHz)
• Supply voltage range (4.2V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• Manufacturer (Microchip Technology)
• Product status (Active)
• Compliance certifications (ROHS3, REACH Unaffected)

The PIC18F4520T-I/PT qualifies as a manufacturer-recommended substitute based on matching core specifications, memory configuration, speed, voltage, and temperature ratings. Differences in package type (44-TQFP vs. 44-PLCC), I/O pin count (36 vs. 34), A/D converter channels (13x10b vs. 8x10b), and oscillator type (Internal vs. External) do not preclude substitution when application requirements permit package and pin configuration changes.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC18F452T-I/L and PIC18F4520T-I/PT maintain active product status with identical compliance certifications (ROHS3 Compliant, REACH Unaffected). Selection between these devices depends on application-specific requirements:

The PIC18F452T-I/L in 44-PLCC package is appropriate for designs requiring J-lead leaded package technology with 34 I/O pins and external oscillator configuration.

The PIC18F4520T-I/PT in 44-TQFP package is appropriate for designs compatible with fine-pitch quad flat pack technology, offering 36 I/O pins, internal oscillator capability, and enhanced A/D converter resolution (13 channels vs. 8 channels).

Both devices share identical core memory specifications, operating voltage, temperature range, and speed ratings, ensuring functional equivalence for applications where package and pin configuration constraints do not apply.

Frequently Asked Questions (FAQ)

Q: Can PIC18F4520T-I/PT directly replace PIC18F452T-I/L in existing designs?

A: Direct replacement requires PCB redesign due to package differences (44-PLCC vs. 44-TQFP). Pin assignments differ between package types. Verify pin mapping and footprint compatibility before implementation.

Q: What are the key differences between these substitute parts?

A: Primary differences include package type (44-PLCC J-lead vs. 44-TQFP), I/O pin count (34 vs. 36), A/D converter channels (8x10b vs. 13x10b), and oscillator type (external vs. internal). Core memory, speed, voltage, and temperature specifications are identical.

Q: Are both parts suitable for the same operating conditions?

A: Yes. Both devices operate across -40°C to 85°C temperature range with 4.2V to 5.5V supply voltage. Moisture sensitivity level (MSL 3) and compliance certifications are identical.

Q: What determines substitution eligibility for PIC18F452T-I/L?

A: Substitution is based on matching core processor architecture, 8-bit core size, 32KB FLASH memory, 1.5KB RAM, 256-byte EEPROM, 40MHz speed, supply voltage range, operating temperature range, and active product status from Microchip Technology with equivalent compliance certifications.

Q: Does the internal oscillator in PIC18F4520T-I/PT affect substitution compatibility?

A: Oscillator type difference (internal vs. external) affects circuit design. Applications requiring external oscillator control must account for this functional difference. Verify oscillator requirements in application specifications.