PIC18F452T-I/PT Equivalent & Substitute Parts

Part Overview

The PIC18F452T-I/PT is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, operating at 40MHz with 32KB FLASH program memory. This device is actively produced and widely used in embedded applications requiring moderate processing capability and integrated peripherals. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when application requirements align with alternative configurations within the same product family.

Substiute Parts

PIC18F452T-I/PT

Microchip TechnologyIn Stock: 1000255PIC18F452T-I/PT Datasheet

Current PartRFQ

PIC18F4520T-I/PT

Microchip TechnologyIn Stock: 5000111PIC18F4520T-I/PT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC18F452T-I/PT is determined by strict alignment of core electrical and mechanical parameters. The following criteria establish valid substitution:

Critical Parameters (Must Match):

• Manufacturer: Microchip Technology
• Core Size: 8-Bit
• Speed: 40MHz
• Program Memory Size: 32KB FLASH
• EEPROM Size: 256 x 8
• RAM Size: 1.5K x 8
• Voltage Supply Range: 4.2V ~ 5.5V
• Package Type: 44-TQFP (10x10)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C

Allowable Variations:

• Number of I/O pins: May vary within the same package footprint
• Data Converter specifications: May differ in channel count or resolution
• Peripheral features: May include enhanced variants (e.g., HLVD vs. LVD)
• Oscillator Type: May be internal or external
• Connectivity options: May include additional protocols

The PIC18F4520T-I/PT qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC18F452T-I/PT and PIC18F4520T-I/PT are Active products with ROHS3 compliance and identical moisture sensitivity ratings, making them suitable for equivalent selection in production environments.

The PIC18F4520T-I/PT provides enhanced capabilities in two areas: two additional I/O pins (36 vs. 34) and increased analog-to-digital converter channels (13x10b vs. 8x10b). The PIC18F4520T-I/PT also features an internal oscillator option compared to the external oscillator requirement of the PIC18F452T-I/PT, and includes HLVD (High/Low Voltage Detect) versus standard LVD (Low Voltage Detect).

Selection between these parts depends on application requirements for I/O count, ADC channel availability, and oscillator configuration. Both devices maintain identical core memory specifications, voltage supply ranges, and thermal operating ranges, ensuring functional compatibility at the system level when these peripheral differences are accommodated in the design.

Frequently Asked Questions (FAQ)

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

A: Direct replacement is possible if the design does not depend on the specific oscillator type (external vs. internal) or require exactly 34 I/O pins. The PIC18F4520T-I/PT provides additional I/O (36 pins) and ADC channels, which are backward compatible in most applications. Firmware compatibility is maintained due to identical core architecture and memory specifications.

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

A: The primary differences are: (1) Number of I/O pins: PIC18F452T-I/PT has 34, PIC18F4520T-I/PT has 36; (2) ADC channels: PIC18F452T-I/PT has 8 channels, PIC18F4520T-I/PT has 13 channels; (3) Oscillator: PIC18F452T-I/PT requires external oscillator, PIC18F4520T-I/PT supports internal oscillator; (4) Voltage detection: PIC18F452T-I/PT has LVD, PIC18F4520T-I/PT has HLVD.

Q: Are both parts available in the same package?

A: Yes. Both the PIC18F452T-I/PT and PIC18F4520T-I/PT use the 44-TQFP (10x10) surface mount package with identical footprints and pinout compatibility for the shared pins.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL (Moisture Sensitivity Level) ratings of 3 (168 Hours). Both are classified under ECCN 3A991A2 and HTSUS 8542.31.0001.

Q: Which part should be selected for new designs?

A: Selection is based on application-specific requirements. If the design requires more than 8 ADC channels or more than 34 I/O pins, the PIC18F4520T-I/PT is the appropriate choice. If the design specifically requires an external oscillator configuration, the PIC18F452T-I/PT is required. For applications with no specific peripheral requirements, the PIC18F4520T-I/PT offers enhanced capability without design penalty.