PIC16F628-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F628-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring basic processing capabilities with integrated peripherals. This device features 4.6KB of FLASH program memory, 224 bytes of RAM, and 128 bytes of EEPROM, operating at 4MHz with a supply voltage range of 3V to 5.5V. The part is currently in active production status with verified programmability through DiGi-Electronics. Substitute parts are identified when equivalent functional requirements can be met while maintaining compatibility with the 20-SSOP surface mount package and core electrical specifications.

Substiute Parts

PIC16F628-04E/SS

Microchip TechnologyIn Stock: 1131PIC16F628-04E/SS Datasheet

Current PartRFQ

PIC16F628A-E/SS

Microchip TechnologyIn Stock: 3828PIC16F628A-E/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F628-04E/SS is determined by strict alignment with the following critical parameters:

• Core Processor Architecture: Must be PIC core to ensure instruction set compatibility
• Core Size: Must remain 8-Bit
• Program Memory: Must be 4.6KB (2K x 14) FLASH
• EEPROM & RAM: Must match 128 x 8 EEPROM and 224 x 8 RAM specifications
• I/O Count: Must provide 16 I/O pins
• Supply Voltage Range: Must support 3V ~ 5.5V operation
• Package: Must be 20-SSOP form factor
• Mounting Type: Must be Surface Mount
• Operating Temperature Range: Must support -40°C ~ 125°C

The PIC16F628A-E/SS qualifies as a direct substitute based on identical memory architecture, I/O configuration, package, and thermal specifications. The primary difference is an increased maximum operating speed (20MHz versus 4MHz), which does not restrict substitution in applications designed for the original 4MHz device.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F628A-E/SS is a qualified substitute for the PIC16F628-04E/SS based on the following engineering criteria:

• Product Status: Both devices maintain active production status with Microchip Technology, ensuring long-term availability and supply chain stability.
• Compliance & Certifications: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
• Programmability: Both devices are verified as programmable through DiGi-Electronics, confirming compatibility with standard development and programming workflows.
• Memory Architecture: Identical memory configuration (4.6KB FLASH, 128 x 8 EEPROM, 224 x 8 RAM) ensures software and firmware compatibility without modification.
• Electrical Specifications: Matching supply voltage range (3V ~ 5.5V) and operating temperature range (-40°C ~ 125°C) confirm functional equivalence in target applications.
• Package Compatibility: Identical 20-SSOP package and pin configuration enable direct PCB-level substitution without layout changes.

The increased maximum speed specification of the PIC16F628A-E/SS (20MHz versus 4MHz) does not restrict its use as a substitute; devices rated for higher speeds operate correctly at lower clock frequencies specified in the original design.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F628A-E/SS be used as a direct replacement for the PIC16F628-04E/SS on existing PCBs?

A: Yes. Both devices use the identical 20-SSOP package with matching pin assignments, supply voltage requirements (3V ~ 5.5V), and operating temperature range (-40°C ~ 125°C). No PCB modifications are required.

Q: Are there differences in memory capacity between these two parts?

A: No. Both the PIC16F628-04E/SS and PIC16F628A-E/SS contain 4.6KB FLASH program memory, 128 x 8 EEPROM, and 224 x 8 RAM. Memory specifications are identical.

Q: What is the significance of the speed difference (4MHz versus 20MHz)?

A: The PIC16F628A-E/SS has a higher maximum operating frequency specification. This does not prevent its use in applications designed for 4MHz operation; the device will function correctly at the lower clock rate. Applications requiring higher speed performance benefit from the increased capability.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both the PIC16F628-04E/SS and PIC16F628A-E/SS are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Is firmware or software modification required when substituting these parts?

A: No. Both devices share identical instruction set architecture, memory organization, and peripheral configuration. Existing firmware and software require no modification for compatibility.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both devices have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.