PIC16C622AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C622AT-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP (One-Time Programmable) memory and operating at 4MHz. This device is classified as Active product status and is ROHS3 compliant. Finding equivalent or substitute parts becomes necessary when OTP memory limitations require reprogrammable alternatives, when higher speed operation is needed, or when extended peripheral functionality is required for application evolution.

Substiute Parts

PIC16C622AT-04E/SS

Microchip TechnologyIn Stock: 1167PIC16C622AT-04E/SS Datasheet

Current PartRFQ

PIC16F628A-E/SS

Microchip TechnologyIn Stock: 3828PIC16F628A-E/SS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16C622AT-04E/SS is determined by the following critical parameters:

Memory Architecture: The PIC16C622AT-04E/SS uses OTP (One-Time Programmable) memory. Substitutes must maintain the same 4.6KB (2K x 14) program memory capacity to ensure code compatibility.

Package Compatibility: Both the main part and substitute must use the 20-SSOP package with identical physical dimensions (0.209", 5.30mm Width) to ensure PCB layout compatibility without redesign.

Core Processor Family: Substitutes must be from the PIC® microcontroller family to maintain instruction set compatibility and peripheral architecture.

Electrical Specifications: Operating voltage range (2.5V ~ 5.5V minimum overlap) and temperature range (-40°C ~ 125°C) must be maintained or exceeded.

Compliance Requirements: RoHS3 compliance and REACH unaffected status must be preserved.

The PIC16F628A-E/SS qualifies as a direct substitute based on identical program memory size, matching package specification, compatible voltage and temperature ranges, and equivalent compliance certifications. The upgrade from OTP to FLASH memory type enables field reprogrammability while maintaining all other critical parameters.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Feasibility: The PIC16F628A-E/SS is a qualified substitute for the PIC16C622AT-04E/SS based on matching program memory capacity, identical package specification, and equivalent compliance certifications (ROHS3, REACH Unaffected).

Product Status Alignment: Both devices maintain Active product status, ensuring continued availability and manufacturing support.

Compliance Preservation: The substitute maintains ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original part.

Electrical Compatibility: The PIC16F628A-E/SS voltage supply range (3V ~ 5.5V) overlaps with the original specification (2.5V ~ 5.5V) within the 3V ~ 5.5V common operating window. Operating temperature range remains identical at -40°C ~ 125°C.

Enhanced Capabilities: The substitute offers increased speed (20MHz vs. 4MHz), additional RAM (224 x 8 vs. 128 x 8), and three additional I/O pins (16 vs. 13), providing design margin and expanded functionality without package or footprint changes.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F628A-E/SS be used as a direct replacement without PCB modifications?

A: Yes. Both devices use the 20-SSOP package with identical physical dimensions (0.209", 5.30mm Width). No PCB layout changes are required for mechanical compatibility.

Q: What is the primary difference between OTP and FLASH memory types?

A: OTP (One-Time Programmable) memory cannot be erased or reprogrammed after initial programming. FLASH memory is field-reprogrammable, allowing code updates without component replacement. Both maintain the same 4.6KB capacity in these devices.

Q: Does the voltage supply range difference affect compatibility?

A: The PIC16F628A-E/SS minimum voltage is 3V versus 2.5V for the original part. If your application operates below 3V, the substitute is not suitable. For applications operating at 3V or above, both devices are compatible within the overlapping 3V ~ 5.5V range.

Q: Are there any firmware or code changes required when switching to the PIC16F628A-E/SS?

A: Code compatibility is maintained due to identical program memory size and PIC® core processor family alignment. However, the increased speed (20MHz vs. 4MHz) and additional peripherals (PWM, UART/USART, expanded I/O) may require timing adjustments or firmware optimization depending on application requirements.

Q: Is the substitute part currently in stock?

A: The PIC16F628A-E/SS has 3,774 pieces in new original stock, compared to 1,130 pieces for the original part, providing improved availability.

Q: What compliance certifications apply to the substitute part?

A: The PIC16F628A-E/SS maintains ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original PIC16C622AT-04E/SS.