PIC16F628T-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F628T-20E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 4.6KB FLASH program memory, 20MHz operation, and 16 I/O pins in a 20-SSOP surface mount package. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing production and design continuity. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Size	4.6KB (2K x 14)
Program Memory Type	FLASH
EEPROM Size	128 x 8
RAM Size	224 x 8
Number of I/O	16
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
Operating Temperature	-40°C ~ 125°C (TA)
Connectivity	UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F628T-20E/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
Speed Rating: 20MHz operation
I/O Count: 16 I/O pins
Package: 20-SSOP form factor with identical pin pitch and dimensions
Voltage Range: 3V ~ 5.5V supply compatibility
Peripheral Set: UART/USART, PWM, WDT, Brown-out Detect/Reset, POR

The identified substitute parts maintain full electrical and mechanical compatibility with the main part number. Differences in product status (active vs. obsolete) and temperature rating ranges do not affect functional substitution within specified operating conditions.

Parameter Comparison

Parameter	PIC16F628T-20E/SS	PIC16F628-20E/SS	PIC16F628-20I/SS
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Core Processor	PIC	PIC	PIC
Core Size	8-Bit	8-Bit	8-Bit
Speed	20MHz	20MHz	20MHz
Program Memory Size	4.6KB (2K x 14)	4.6KB (2K x 14)	4.6KB (2K x 14)
Program Memory Type	FLASH	FLASH	FLASH
EEPROM Size	128 x 8	128 x 8	128 x 8
RAM Size	224 x 8	224 x 8	224 x 8
Number of I/O	16	16	16
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Connectivity	UART/USART	UART/USART	UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

PIC16F628-20E/SS is the primary substitute for PIC16F628T-20E/SS. Both parts share identical electrical specifications, memory configuration, and operating temperature range (-40°C ~ 125°C). The PIC16F628-20E/SS holds active product status and is verified as programmable, providing superior supply chain availability and long-term support compared to the obsolete main part number.

PIC16F628-20I/SS is a secondary substitute option. This part maintains full electrical and mechanical compatibility with identical core specifications, memory, I/O count, and package. The operating temperature range is restricted to -40°C ~ 85°C, which represents a narrower specification window. Selection of PIC16F628-20I/SS is appropriate only when application operating conditions remain within the -40°C ~ 85°C envelope. Both substitute parts carry active product status, ROHS3 compliance, and REACH unaffected designation.

Frequently Asked Questions (FAQ)

Q: Can PIC16F628-20E/SS directly replace PIC16F628T-20E/SS in existing designs?

A: Yes. PIC16F628-20E/SS provides direct functional replacement with identical electrical specifications, memory configuration, I/O count, and 20-SSOP package dimensions. No circuit modifications are required.

Q: What is the difference between PIC16F628-20E/SS and PIC16F628-20I/SS?

A: The primary difference is operating temperature range. PIC16F628-20E/SS operates from -40°C to 125°C, while PIC16F628-20I/SS operates from -40°C to 85°C. All other electrical and mechanical parameters are identical. Selection depends on application temperature requirements.

Q: Why is the original part number (PIC16F628T-20E/SS) marked as obsolete?

A: Obsolete status indicates the part is no longer in active production. The substitute parts PIC16F628-20E/SS and PIC16F628-20I/SS are actively manufactured and represent the current product line equivalent.

Q: Are all three parts ROHS3 compliant?

A: Yes. PIC16F628T-20E/SS, PIC16F628-20E/SS, and PIC16F628-20I/SS are all ROHS3 compliant with MSL rating of 1 (Unlimited) and REACH unaffected status.

Q: Can I use PIC16F628-20I/SS in an application requiring -40°C to 125°C operation?

A: No. PIC16F628-20I/SS is rated only to 85°C maximum. For applications requiring operation up to 125°C, use PIC16F628-20E/SS.

Q: Are the 20-SSOP packages identical across all three parts?

A: Yes. All three parts use the same 20-SSOP package with 0.209" width and 5.30mm dimensions, ensuring identical PCB footprint and pin compatibility.

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