PIC16LC66T-04I/SO Equivalent & Substitute Parts

Part Overview

The PIC16LC66T-04I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 14KB OTP program memory, 368 x 8 bytes of RAM, and 22 I/O pins. The device operates at 4MHz with a supply voltage range of 2.5V to 6V and includes integrated peripherals such as PWM, WDT, brown-out detection, and communication interfaces (I2C, SPI, UART/USART). The main part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and component procurement.

Substiute Parts

PIC16LC66T-04I/SO

Microchip TechnologyIn Stock: 736PIC16LC66T-04I/SO Datasheet

Current PartRFQ

PIC16LC66-04I/SO

Microchip TechnologyIn Stock: 831PIC16LC66-04I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC66T-04I/SO is determined by strict equivalence across the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Memory Configuration: 14KB (8K x 14) OTP program memory and 368 x 8 RAM
• Operating Frequency: 4MHz
• I/O Count: 22 pins
• Supply Voltage Range: 2.5V ~ 6V
• Package Type: 28-SOIC surface mount
• Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, brown-out detection, POR
• Temperature Range: -40°C ~ 85°C

The substitute part PIC16LC66-04I/SO maintains identical electrical and mechanical specifications across all parameters listed above. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC66-04I/SO is a direct functional equivalent to the PIC16LC66T-04I/SO. Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The substitute part maintains active product status with Microchip Technology, ensuring ongoing availability and supply chain stability compared to the obsolete main part number. Both devices carry MSL Level 1 (Unlimited) moisture sensitivity classification, indicating no special moisture handling requirements during storage or assembly.

Selection of the PIC16LC66-04I/SO is supported by identical electrical specifications, mechanical compatibility, and regulatory compliance across all provided parameters.

Frequently Asked Questions (FAQ)

Q: Are the PIC16LC66T-04I/SO and PIC16LC66-04I/SO pin-compatible?

A: Yes. Both devices use the 28-SOIC package with identical pin assignments, I/O count (22 pins), and peripheral configurations. Direct PCB footprint compatibility is confirmed.

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

A: The primary differences are product status and packaging format. The PIC16LC66T-04I/SO is classified as obsolete, while the PIC16LC66-04I/SO maintains active status. The substitute is supplied in tube packaging. All electrical and mechanical specifications are identical.

Q: Can I use PIC16LC66-04I/SO as a direct replacement in existing designs?

A: Yes. The substitute part maintains identical core processor architecture, memory configuration (14KB OTP program memory, 368 x 8 RAM), operating frequency (4MHz), supply voltage range (2.5V ~ 6V), temperature range (-40°C ~ 85°C), and peripheral set (I2C, SPI, UART/USART, PWM, WDT, brown-out detection, POR).

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL Level 1 (Unlimited) moisture sensitivity ratings.

Q: Why should I transition from the obsolete part to the active substitute?

A: The PIC16LC66-04I/SO maintains active product status with Microchip Technology, ensuring continued availability, supply chain support, and manufacturing consistency. The obsolete status of the main part number creates procurement risk and potential long-term supply constraints.