PIC16F628AT-E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F628AT-E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring compact flash memory and integrated peripherals. This device features 4.6KB of FLASH program memory, 224 bytes of RAM, and 128 bytes of EEPROM, operating across a wide voltage range of 3V to 5.5V. The part is currently in active production status with verified programmability through DiGi-Electronics. Identifying equivalent substitute parts is essential for supply chain continuity, inventory optimization, and design flexibility when the primary part number becomes unavailable or when alternative packaging or stock conditions are preferred.

Substiute Parts

PIC16F628AT-E/SS

Microchip TechnologyIn Stock: 949PIC16F628AT-E/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 PIC16F628AT-E/SS is determined by strict equivalence across the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Memory Configuration: 4.6KB FLASH, 128 x 8 EEPROM, 224 x 8 RAM
• Operating Specifications: 20MHz maximum speed, 3V to 5.5V supply voltage range, -40°C to 125°C temperature range
• Peripheral Set: UART/USART connectivity, Brown-out Detect/Reset, POR, PWM, WDT
• I/O Count: 16 I/O pins
• Package: 20-SSOP surface mount form factor with 0.209" width (5.30mm)

The PIC16F628A-E/SS meets all these criteria and qualifies as a direct substitute. Both parts share identical electrical specifications, memory architecture, peripheral functionality, and physical packaging. Differences are limited to internal silicon revisions and manufacturing date codes, which do not affect functional compatibility or pin-level operation.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16F628AT-E/SS and PIC16F628A-E/SS are active production devices from Microchip Technology with full compliance to ROHS3, REACH, and export control classifications (EAR99, HTSUS 8542.31.0001). Selection between these parts should be based on:

Availability and Lead Time: The PIC16F628A-E/SS currently maintains higher inventory levels (3774 pieces) compared to the PIC16F628AT-E/SS (904 pieces), making it the preferred choice for immediate procurement needs.

Packaging Format: The PIC16F628A-E/SS is supplied in tube packaging, while the PIC16F628AT-E/SS packaging specification is not defined. Tube packaging is standard for automated assembly processes and provides better protection during storage and transport.

Regulatory Compliance: Both parts carry identical compliance certifications and are suitable for applications requiring ROHS3 and REACH compliance.

Functional Equivalence: No functional differences exist between these parts at the electrical or operational level. Pin assignments, memory architecture, peripheral functionality, and performance characteristics are identical.

Frequently Asked Questions (FAQ)

Q: Can PIC16F628A-E/SS be used as a direct replacement for PIC16F628AT-E/SS in existing designs?

A: Yes. Both parts are functionally equivalent across all electrical, memory, peripheral, and physical parameters. No circuit modifications, firmware changes, or PCB layout adjustments are required. Pin-for-pin compatibility is guaranteed.

Q: Are there any differences in programming or firmware compatibility?

A: No. Both parts use identical instruction sets, memory organization, and programming protocols. Firmware compiled for the PIC16F628AT-E/SS will execute identically on the PIC16F628A-E/SS without modification.

Q: What is the significance of the "T" designation in PIC16F628AT-E/SS?

A: The "T" suffix indicates an internal silicon revision. This represents a manufacturing or design iteration but does not affect functional compatibility, electrical specifications, or operational characteristics. Both revisions are fully interchangeable.

Q: Does the 20-SSOP package remain consistent between both parts?

A: Yes. Both parts use the identical 20-SSOP surface mount package with 0.209" width (5.30mm). PCB footprints, solder pad layouts, and assembly processes are identical.

Q: Are both parts suitable for industrial temperature range applications?

A: Yes. Both parts operate across the full -40°C to 125°C temperature range, meeting industrial and automotive grade requirements.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard storage and handling procedures apply without special desiccant or humidity control requirements.