PIC16C67-20I/P Equivalent & Substitute Parts

Part Overview

The PIC16C67-20I/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 14KB OTP (One-Time Programmable) memory and operating at 20MHz. This device is designed for embedded applications requiring fixed firmware implementation. The part is currently active in production with verified programmable status and full RoHS3 compliance.

Finding equivalent substitute parts becomes necessary when OTP memory variants are unavailable or when reprogrammable memory is preferred for development and production flexibility. The PIC16F77-I/P provides a direct functional alternative with identical core specifications but utilizes FLASH memory technology instead of OTP.

Substiute Parts

PIC16C67-20I/P

Microchip TechnologyIn Stock: 1060PIC16C67-20I/P Datasheet

Current PartRFQ

PIC16F77-I/P

Microchip TechnologyIn Stock: 2172PIC16F77-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PIC16F77-I/P qualifies as a direct substitute based on the following alignment of critical parameters:

Matching Parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating speed (20MHz)
• Program memory capacity (14KB / 8K x 14)
• RAM capacity (368 x 8)
• I/O count (33 pins)
• Operating temperature range (-40°C ~ 85°C)
• Package form factor (40-DIP)
• Mounting type (Through Hole)
• Connectivity interfaces (I2C, SPI, UART/USART)
• Peripheral features (Brown-out Detect/Reset, POR, PWM, WDT)

Key Difference: The primary distinction is the program memory technology: PIC16C67-20I/P uses OTP (One-Time Programmable) memory, while PIC16F77-I/P uses FLASH memory. This difference does not affect functional compatibility in applications where the firmware is finalized, as both memory types retain programmed data identically during operation.

Voltage Supply Consideration: The PIC16C67-20I/P operates across 4V ~ 6V, while the PIC16F77-I/P operates across 4V ~ 5.5V. Applications operating above 5.5V require verification against the PIC16F77-I/P datasheet specifications.

Parameter Comparison

Engineering Selection Recommendations

For OTP Applications (Original Part Preferred): The PIC16C67-20I/P remains the specified choice for production designs where firmware is finalized and OTP memory meets cost and performance requirements. Both parts maintain identical RoHS3 and REACH compliance status.

For FLASH-Based Development or Reprogramming: The PIC16F77-I/P is suitable when reprogrammable memory is required for firmware updates, in-circuit programming, or development cycles. The substitution is valid across all functional parameters with the exception of the voltage supply upper limit (5.5V vs. 6V).

Voltage Supply Verification: Applications operating at supply voltages between 5.5V and 6V must confirm compatibility with PIC16F77-I/P specifications before substitution. Standard 5V operation presents no compatibility concerns.

Compliance and Certification: Both parts carry identical RoHS3 compliance, REACH unaffected status, EAR99 export classification, and HTSUS code 8542.31.0001, ensuring regulatory equivalence for procurement and supply chain purposes.

Frequently Asked Questions (FAQ)

Q: Can PIC16F77-I/P be used as a direct replacement for PIC16C67-20I/P in existing designs?

A: Yes, provided the application operates within the PIC16F77-I/P voltage supply range (4V ~ 5.5V). The 40-DIP package, pin configuration, core architecture, memory capacity, I/O count, and operating temperature range are identical. The primary difference is memory technology (FLASH vs. OTP), which does not affect runtime operation once firmware is programmed.

Q: What is the key difference between OTP and FLASH memory in these parts?

A: OTP (One-Time Programmable) memory in the PIC16C67-20I/P can be programmed once during manufacturing and cannot be erased. FLASH memory in the PIC16F77-I/P can be erased and reprogrammed multiple times. Both retain programmed data identically during normal operation.

Q: Are there any pin compatibility issues between these parts?

A: No. Both parts use the 40-DIP package with identical pin assignments, I/O configuration (33 pins), and mechanical dimensions (0.600", 15.24mm). Direct socket substitution is possible without PCB modifications.

Q: What is the voltage supply difference, and does it matter?

A: The PIC16C67-20I/P supports 4V ~ 6V, while the PIC16F77-I/P supports 4V ~ 5.5V. If your application operates at 5.5V or below, substitution is valid. Applications requiring operation above 5.5V must use the original PIC16C67-20I/P or verify alternative solutions.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PIC16C67-20I/P and PIC16F77-I/P are RoHS3 compliant and REACH unaffected, with identical EAR99 export classification and HTSUS code 8542.31.0001.

Q: Can I use PIC16F77-I/P for firmware development and then switch to PIC16C67-20I/P for production?

A: Yes. The PIC16F77-I/P's reprogrammable FLASH memory is suitable for development and testing. Once firmware is finalized, the PIC16C67-20I/P can be programmed with the same firmware for production deployment, leveraging OTP memory's cost advantages in high-volume manufacturing.

Q: Do both parts support the same communication interfaces?

A: Yes. Both parts include identical connectivity: I2C, SPI, and UART/USART interfaces, along with identical peripheral features (Brown-out Detect/Reset, POR, PWM, WDT).