PIC18LC252T-I/SO Equivalent & Substitute Parts

Part Overview

The PIC18LC252T-I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 18C series, featuring 32KB OTP program memory, 1.5KB RAM, and integrated peripherals including I2C, SPI, and UART/USART connectivity. The device operates at 40MHz with a supply voltage range of 2.5V to 5.5V and is housed in a 28-SOIC surface mount package.

The PIC18LC252T-I/SO carries an Obsolete product status. Identifying equivalent substitute parts is essential for design continuity, procurement planning, and system maintenance when original inventory becomes unavailable.

Substiute Parts

PIC18LC252T-I/SO

Microchip TechnologyIn Stock: 905PIC18LC252T-I/SO Datasheet

Current PartRFQ

PIC18LC252-I/SO

Microchip TechnologyIn Stock: 2135PIC18LC252-I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC18LC252T-I/SO is determined by strict equivalence across the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Memory Configuration: 32KB OTP program memory, 1.5KB RAM
• Operating Frequency: 40MHz maximum
• Supply Voltage Range: 2.5V ~ 5.5V
• Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, Brown-out Detect/Reset, LVD, POR
• I/O Count: 22 pins
• Package Type: 28-SOIC surface mount
• Compliance: ROHS3 Compliant, MSL Level 1

The substitute part PIC18LC252-I/SO maintains identical electrical and mechanical specifications across all parameters listed above, differing only in product status (Active vs. Obsolete) and packaging format (Tube vs. unspecified for the main part).

Parameter Comparison

Engineering Selection Recommendations

The PIC18LC252-I/SO is a direct functional equivalent to the PIC18LC252T-I/SO. Both devices are manufactured by Microchip Technology and share identical electrical specifications, memory configuration, peripheral set, and package geometry.

The primary distinction is product lifecycle status: the PIC18LC252T-I/SO is classified as Obsolete, while the PIC18LC252-I/SO maintains Active status. This status difference reflects manufacturing availability and long-term supply reliability. The substitute part is supplied in Tube packaging format, which is standard for active production components.

Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and storage requirements. Selection between these parts should be based on procurement availability and supply chain continuity requirements.

Frequently Asked Questions (FAQ)

Q: Are the PIC18LC252T-I/SO and PIC18LC252-I/SO pin-compatible?

A: Yes. Both devices use the 28-SOIC package with identical pin assignments, electrical characteristics, and functional capabilities. Direct PCB substitution is supported without design modification.

Q: What is the significance of the "T" designation in PIC18LC252T-I/SO?

A: The "T" suffix typically indicates a specific manufacturing or packaging variant within Microchip's product line. The substitute part PIC18LC252-I/SO represents the current active production variant of the same core device.

Q: Can I use PIC18LC252-I/SO in existing designs originally specified for PIC18LC252T-I/SO?

A: Yes. The electrical and mechanical parameters are identical. No circuit design changes are required. Firmware compatibility is maintained across both variants.

Q: What is the difference between OTP and other program memory types?

A: OTP (One-Time Programmable) memory can be programmed once during manufacturing or initial deployment. Both the main part and substitute use OTP memory type, making them functionally equivalent for applications requiring permanent code storage.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical ROHS3 compliance and REACH Unaffected status. MSL Level 1 rating applies to both, indicating unlimited shelf life under controlled storage conditions.

Q: Why is the main part listed as Obsolete?

A: Product obsolescence reflects Microchip's manufacturing lifecycle decisions. The PIC18LC252-I/SO remains in active production, ensuring continued availability and supply chain support for new designs and legacy system maintenance.