PIC16C620-04I/P Equivalent & Substitute Parts

Part Overview

The PIC16C620-04I/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device operates at 4MHz with 896 bytes of program memory and is housed in an 18-PDIP package. The part is currently active in production and widely available.

Substitute parts are necessary when the original part becomes unavailable, when design requirements shift toward enhanced capabilities, or when supply chain optimization requires component standardization across product lines.

Substiute Parts

PIC16C620-04I/P

Microchip TechnologyIn Stock: 1010PIC16C620-04I/P Datasheet

Current PartRFQ

PIC16C620A-04I/P

Microchip TechnologyIn Stock: 2217PIC16C620A-04I/P Datasheet

DirectRFQ

PIC16F627A-I/P

Microchip TechnologyIn Stock: 4694PIC16F627A-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C620-04I/P is determined by the following critical parameters:

Core compatibility criteria:

• Manufacturer: Microchip Technology
• Core processor: PIC architecture
• Core size: 8-Bit
• Package / Case: 18-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Operating temperature range: -40°C ~ 85°C (TA)

Functional compatibility criteria:

• Voltage supply range must encompass or match the original 3V ~ 6V specification
• Program memory type and size determine application suitability
• RAM size and I/O count affect peripheral integration capability
• Speed rating influences timing-critical applications

The substitute parts listed below meet the core compatibility criteria while offering variations in memory configuration, speed, and supply voltage range.

Parameter Comparison

Engineering Selection Recommendations

PIC16C620A-04I/P (Direct Substitute)

This part maintains identical speed (4MHz) and program memory configuration (896B OTP) as the original PIC16C620-04I/P. The primary differences are increased RAM (96 x 8 versus 80 x 8) and a narrower supply voltage range (2.5V ~ 5.5V versus 3V ~ 6V). Both parts are ROHS3 compliant and active in production. Selection of this substitute is appropriate when the lower supply voltage floor (2.5V) is acceptable for the application and the additional 16 bytes of RAM provides functional benefit.

PIC16F627A-I/P (Enhanced Substitute)

This part represents a functional upgrade within the same package footprint. It features FLASH memory instead of OTP, enabling field reprogramming capability. Operating speed increases to 20MHz, program memory expands to 1.75KB, and RAM increases to 224 x 8. Additional peripherals include PWM and UART/USART connectivity, plus 128 x 8 bytes of EEPROM. The supply voltage range is 3V ~ 5.5V. This substitute is suitable for applications requiring reprogrammable firmware, higher processing speed, or expanded I/O and memory resources. All parts maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can PIC16C620A-04I/P be used as a direct replacement for PIC16C620-04I/P?

A: Yes. Both parts operate at 4MHz with 896B OTP program memory in an 18-DIP package. The PIC16C620A-04I/P provides additional RAM (96 x 8 versus 80 x 8) and maintains identical speed and memory architecture. Verify that your application's supply voltage requirement does not exceed 5.5V, as the substitute's upper limit is lower than the original (5.5V versus 6V).

Q: What are the key differences between OTP and FLASH memory options?

A: OTP (One-Time Programmable) memory in the PIC16C620-04I/P and PIC16C620A-04I/P is programmed once during manufacturing and cannot be altered. FLASH memory in the PIC16F627A-I/P allows field reprogramming, enabling firmware updates after deployment. FLASH-based devices are suitable for development, prototyping, and applications requiring firmware updates.

Q: Is the PIC16F627A-I/P compatible with existing PCB layouts designed for PIC16C620-04I/P?

A: Yes. Both devices use the same 18-DIP (0.300", 7.62mm) package and through-hole mounting. Pin-to-pin compatibility exists for the 18-pin footprint. However, verify that your application firmware is compatible with the PIC® 16F architecture and that any additional peripherals (PWM, UART/USART, EEPROM) do not conflict with existing circuit design.

Q: What supply voltage range should I use when substituting parts?

A: The safe operating range is the intersection of all applicable parts' voltage specifications. For PIC16C620-04I/P (3V ~ 6V) and PIC16C620A-04I/P (2.5V ~ 5.5V), the common range is 3V ~ 5.5V. For PIC16F627A-I/P (3V ~ 5.5V), the common range across all three parts is 3V ~ 5.5V. Design your power supply to operate within this intersection to ensure compatibility across all substitute options.

Q: Are all three parts RoHS compliant?

A: Yes. PIC16C620-04I/P, PIC16C620A-04I/P, and PIC16F627A-I/P are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Can I use PIC16F627A-I/P in a timing-critical application originally designed for PIC16C620-04I/P?

A: The PIC16F627A-I/P operates at 20MHz compared to the original 4MHz. While the higher speed provides additional processing capability, verify that your application firmware and external circuit timing (oscillator, peripheral interfaces) are compatible with the increased clock frequency. Internal timing-dependent functions may require firmware adjustment.