PIC18LF44J10T-I/PT Equivalent & Substitute Parts

Part Overview

The PIC18LF44J10T-I/PT is an 8-bit microcontroller from Microchip Technology's PIC® 18J series, featuring 16KB FLASH program memory, 1KB RAM, and 32 I/O pins in a 44-TQFP surface mount package. This device operates at 40MHz with integrated connectivity options including I2C, SPI, and UART/USART interfaces, along with peripheral functions such as PWM, watchdog timer, and brown-out detection.

The PIC18LF44J10T-I/PT carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this microcontroller.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	40MHz
Program Memory Size	16KB (8K x 16)
Program Memory Type	FLASH
RAM Size	1K x 8
Voltage Supply (Vcc/Vdd)	2V ~ 3.6V
Number of I/O	32
Connectivity	I2C, SPI, UART/USART
Data Converters	A/D 13x10b
Mounting Type	Surface Mount
Package / Case	44-TQFP (10x10)
Operating Temperature	-40°C ~ 85°C (TA)

Substitute Part Grouping Explanation

Substitution of the PIC18LF44J10T-I/PT is determined by strict equivalence across the following critical parameters:

Core Architecture: PIC 8-bit processor
Memory Configuration: 16KB FLASH program memory, 1KB RAM
Speed Rating: 40MHz maximum operating frequency
I/O Count: 32 I/O pins
Connectivity Interfaces: I2C, SPI, UART/USART support
Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
Analog Capability: 13-channel 10-bit A/D converter
Voltage Range: 2V ~ 3.6V supply operation
Package Type: 44-TQFP (10x10) surface mount
Temperature Range: -40°C ~ 85°C

The substitute part PIC18LF44J10-I/PT matches all electrical and functional specifications. The primary difference is packaging format (Tray vs. standard packaging) and product status (Active vs. Obsolete), with no impact on electrical compatibility or functional performance.

Parameter Comparison

Parameter	PIC18LF44J10T-I/PT (Main)	PIC18LF44J10-I/PT (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	PIC® 18J	PIC® 18J
Core Processor	PIC	PIC
Core Size	8-Bit	8-Bit
Speed	40MHz	40MHz
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)
Program Memory Type	FLASH	FLASH
RAM Size	1K x 8	1K x 8
Voltage Supply (Vcc/Vdd)	2V ~ 3.6V	2V ~ 3.6V
Number of I/O	32	32
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 13x10b	A/D 13x10b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	44-TQFP (10x10)	44-TQFP (10x10)
Base Product Number	PIC18LF44	PIC18LF44
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	3A991A2	3A991A2
HTSUS	8542.31.0001	8542.31.0001
Product Status	Obsolete	Active
Supplier Device Package	44-TQFP (10x10)	44-TQFP (10x10)

Engineering Selection Recommendations

The PIC18LF44J10-I/PT is a direct functional equivalent to the PIC18LF44J10T-I/PT. Both devices share identical electrical specifications, memory configuration, I/O architecture, and peripheral functionality. The substitute part carries Active product status, ensuring continued availability and manufacturer support, whereas the main part is classified as Obsolete.

Both parts maintain full compliance with RoHS3 and REACH regulatory requirements, with matching ECCN and HTSUS classifications. The packaging format difference (Tray for the substitute) does not affect electrical performance or PCB integration. Selection of the PIC18LF44J10-I/PT is appropriate for new designs and production continuity where the PIC18LF44J10T-I/PT is no longer available.

Frequently Asked Questions (FAQ)

Q: Are the PIC18LF44J10T-I/PT and PIC18LF44J10-I/PT electrically identical?

A: Yes. Both devices are electrically and functionally identical across all specified parameters including processor architecture, memory size, speed rating, I/O count, connectivity interfaces, and peripheral functions.

Q: What is the difference between these two part numbers?

A: The primary differences are product status (Obsolete vs. Active) and packaging format (standard vs. Tray). These differences do not affect electrical compatibility or functional performance in circuit applications.

Q: Can I use the PIC18LF44J10-I/PT as a direct replacement on existing PCBs?

A: Yes. The PIC18LF44J10-I/PT is a direct pin-for-pin and functionally equivalent replacement. No PCB modifications are required.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PIC18LF44J10T-I/PT and PIC18LF44J10-I/PT are ROHS3 Compliant and REACH Unaffected.

Q: What is the moisture sensitivity level for these devices?

A: Both parts have a Moisture Sensitivity Level (MSL) of 3, with a floor life of 168 hours at 30°C / 60% RH.

Q: Are there any firmware or software compatibility differences?

A: No. Both devices use the same PIC® 18J core architecture and instruction set. Firmware developed for one part is fully compatible with the other.

Q: Which part should I specify for new production?

A: The PIC18LF44J10-I/PT is recommended for new designs and ongoing production due to its Active product status and assured long-term availability.

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