Request Quote
(Ships tomorrow)
PIC18LF4331T-I/PT Equivalent & Substitute Parts
Part Overview
The PIC18LF4331T-I/PT is an 8-bit microcontroller from Microchip Technology's PIC® 18F series, featuring 8KB FLASH program memory, 768 bytes of RAM, and 256 bytes of EEPROM. This device integrates I2C, SPI, and UART/USART connectivity with comprehensive peripheral support including PWM, QEI, brown-out detection, and watchdog timer functionality. The part is classified as obsolete, making identification of compatible alternatives essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Speed | 40MHz |
| Program Memory Size | 8KB (4K x 16) |
| Program Memory Type | FLASH |
| RAM Size | 768 x 8 |
| EEPROM Size | 256 x 8 |
| Number of I/O | 36 |
| Voltage Supply (Vcc/Vdd) | 2V ~ 5.5V |
| Data Converters | A/D 9x10b |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP (10x10) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the PIC18LF4331T-I/PT is determined by strict equivalence across the following critical parameters:
- Core Architecture: PIC 8-bit processor
- Memory Configuration: 8KB FLASH program memory, 768 bytes RAM, 256 bytes EEPROM
- Operating Frequency: 40MHz maximum
- I/O Count: 36 I/O pins
- Peripheral Set: I2C, SPI, UART/USART, PWM, QEI, brown-out detection, LVD, WDT
- Voltage Range: 2V to 5.5V supply
- Package: 44-TQFP (10x10) surface mount
- Compliance: ROHS3, REACH Unaffected
The substitute part PIC18LF4331-I/PT maintains identical electrical and mechanical specifications across all parameters listed above, with the distinction that it carries an active product status versus the obsolete classification of the main part.
Parameter Comparison
| Parameter | PIC18LF4331T-I/PT (Main) | PIC18LF4331-I/PT (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Core Processor | PIC | PIC |
| Core Size | 8-Bit | 8-Bit |
| Speed | 40MHz | 40MHz |
| Program Memory Size | 8KB (4K x 16) | 8KB (4K x 16) |
| Program Memory Type | FLASH | FLASH |
| RAM Size | 768 x 8 | 768 x 8 |
| EEPROM Size | 256 x 8 | 256 x 8 |
| Number of I/O | 36 | 36 |
| Voltage Supply (Vcc/Vdd) | 2V ~ 5.5V | 2V ~ 5.5V |
| Data Converters | A/D 9x10b | A/D 9x10b |
| Connectivity | I2C, SPI, UART/USART | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT | Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP (10x10) | 44-TQFP (10x10) |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The PIC18LF4331-I/PT serves as a direct functional equivalent to the PIC18LF4331T-I/PT. Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The primary distinction is product lifecycle status: the main part is classified as obsolete while the substitute maintains active status with Microchip Technology.
For applications currently using the PIC18LF4331T-I/PT, transition to the PIC18LF4331-I/PT is supported by identical electrical specifications, memory configuration, peripheral integration, and package geometry. No design modifications are required for this substitution.
Frequently Asked Questions (FAQ)
Q: Are the PIC18LF4331T-I/PT and PIC18LF4331-I/PT pin-compatible?
A: Yes. Both devices use the 44-TQFP (10x10) package with identical pin assignments, I/O count (36), and peripheral mapping.
Q: What is the difference between these two part numbers?
A: The primary difference is product status. The PIC18LF4331T-I/PT is obsolete, while the PIC18LF4331-I/PT maintains active production status. All electrical and mechanical specifications are identical.
Q: Can I use the PIC18LF4331-I/PT as a direct replacement in existing designs?
A: Yes. The substitute part maintains identical memory configuration (8KB FLASH, 768 bytes RAM, 256 bytes EEPROM), operating frequency (40MHz), voltage range (2V to 5.5V), peripheral set, and package specifications.
Q: Are both parts compliant with current environmental standards?
A: Yes. Both the PIC18LF4331T-I/PT and PIC18LF4331-I/PT are ROHS3 compliant with MSL rating 3 (168 hours).
Q: What connectivity options are available on these microcontrollers?
A: Both devices integrate I2C, SPI, and UART/USART serial communication interfaces, supporting standard embedded system communication protocols.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts