PIC18F442T-I/L Equivalent & Substitute Parts

Part Overview

The PIC18F442T-I/L is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, featuring 16KB FLASH program memory, 768 bytes of 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 and is RoHS3 compliant. Equivalent and substitute parts are identified based on core processor architecture, memory configuration, speed rating, and electrical specifications to ensure functional compatibility in embedded system applications.

Substiute Parts

PIC18F442T-I/L

Microchip TechnologyIn Stock: 919PIC18F442T-I/L Datasheet

Current PartRFQ

PIC18F442-I/L

Microchip TechnologyIn Stock: 2325PIC18F442-I/L Datasheet

DirectRFQ

PIC18F4420T-I/PT

Microchip TechnologyIn Stock: 3498PIC18F4420T-I/PT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PIC18F442T-I/L are identified based on the following critical parameters that determine functional compatibility:

Core Architecture & Memory: All substitutes maintain the PIC 8-bit core processor with identical 16KB FLASH program memory, 768 bytes RAM, and 256 bytes EEPROM configuration.

Electrical Specifications: Voltage supply range (4.2V ~ 5.5V) and operating temperature range (-40°C ~ 85°C) remain constant across all substitutes.

Speed Rating: All substitutes operate at 40MHz, ensuring timing-critical applications maintain performance equivalence.

Connectivity & Peripherals: I2C, SPI, and UART/USART interfaces are preserved. Peripheral features including Brown-out Detect/Reset, POR, PWM, and WDT are maintained.

Compliance: All substitutes maintain RoHS3 compliance and REACH unaffected status.

Substitutes differ in packaging format (PLCC vs. TQFP), pin count (34 vs. 36 I/O), and specific peripheral variants (LVD vs. HLVD, A/D resolution 8x10b vs. 13x10b), which may require board-level design considerations.

Parameter Comparison

Engineering Selection Recommendations

PIC18F442-I/L: This direct substitute maintains identical electrical and functional specifications to the PIC18F442T-I/L, with the primary difference being packaging format (Tube vs. standard packaging). Both devices feature 44-PLCC packaging and are suitable for direct replacement in existing designs. This substitute is recommended when PLCC package compatibility is required and MSL rating differences are acceptable for the application environment.

PIC18F4420T-I/PT: This manufacturer-recommended substitute operates at equivalent speed and voltage specifications but differs in package format (44-TQFP vs. 44-PLCC) and I/O pin count (36 vs. 34). The PIC18F4420T-I/PT features enhanced analog capabilities (13x10b A/D vs. 8x10b) and HLVD peripheral variant. This substitute is suitable for applications where TQFP packaging is preferred and the additional I/O and analog resolution provide design advantages. Board-level redesign is required due to package incompatibility.

All substitutes maintain active product status and full RoHS3 compliance, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can PIC18F442-I/L be used as a direct replacement for PIC18F442T-I/L?

A: Yes. Both devices share identical core specifications, memory configuration, speed rating, and electrical parameters. The primary difference is packaging format. Direct socket replacement is possible if the PCB footprint accommodates 44-PLCC packaging.

Q: What are the key differences between PIC18F442T-I/L and PIC18F4420T-I/PT?

A: The PIC18F4420T-I/PT uses 44-TQFP packaging instead of 44-PLCC, provides 36 I/O pins versus 34, features enhanced A/D resolution (13x10b vs. 8x10b), and includes HLVD instead of LVD peripheral. Both maintain 40MHz operation and identical memory specifications. PCB redesign is required for package substitution.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory equivalence for industrial and commercial applications.

Q: What packaging options are available for these substitutes?

A: PIC18F442T-I/L and PIC18F442-I/L are supplied in 44-PLCC (16.59x16.59) packaging. PIC18F4420T-I/PT is supplied in 44-TQFP (10x10) packaging. Package selection depends on PCB design requirements and available footprint space.

Q: Do all substitutes operate at the same voltage and temperature range?

A: Yes. All substitutes operate within 4.2V to 5.5V supply voltage and -40°C to 85°C operating temperature range, ensuring electrical compatibility in equivalent system designs.