PIC16F628T-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F628T-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 4.6KB FLASH program memory, 224 bytes of RAM, and 128 bytes of EEPROM. This device operates at 4MHz with a supply voltage range of 3V to 5.5V and is housed in a 20-SSOP surface mount package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	4MHz
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
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
Connectivity	UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT

Substitute Part Grouping Explanation

Substitution for the PIC16F628T-04E/SS is determined by strict equivalence across the following critical parameters:

Core Architecture: PIC 8-bit processor
Memory Configuration: 4.6KB FLASH program memory, 128 x 8 EEPROM, 224 x 8 RAM
Operating Speed: 4MHz
Supply Voltage Range: 3V ~ 5.5V
Package Type: 20-SSOP surface mount
I/O Count: 16 pins
Peripheral Set: UART/USART, Brown-out Detect/Reset, POR, PWM, WDT

The identified substitutes maintain identical electrical specifications and package footprint, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Parameter	PIC16F628T-04E/SS	PIC16F628-04E/SS	PIC16F628-04I/SS
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Core Processor	PIC	PIC	PIC
Core Size	8-Bit	8-Bit	8-Bit
Speed	4MHz	4MHz	4MHz
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
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
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)
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)

Engineering Selection Recommendations

PIC16F628-04E/SS is the primary substitute for the obsolete PIC16F628T-04E/SS. Both parts are electrically and mechanically identical with matching temperature ranges (-40°C to 125°C), supply voltage specifications, and peripheral configurations. The PIC16F628-04E/SS carries active product status and is ROHS3 compliant, making it suitable for new production and long-term availability.

PIC16F628-04I/SS is an alternative substitute with identical electrical specifications and package footprint. This variant operates within a narrower temperature range (-40°C to 85°C) and is also actively produced. Selection between PIC16F628-04E/SS and PIC16F628-04I/SS depends on application temperature requirements. Both parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can PIC16F628-04E/SS directly replace PIC16F628T-04E/SS?

A: Yes. Both parts share identical core architecture, memory configuration, operating speed, supply voltage range, package type, and peripheral set. The substitution is electrically and mechanically direct.

Q: What is the difference between PIC16F628-04E/SS and PIC16F628-04I/SS?

A: The primary difference is operating temperature range. PIC16F628-04E/SS operates from -40°C to 125°C, while PIC16F628-04I/SS operates from -40°C to 85°C. All other electrical and mechanical parameters are identical. Selection depends on application temperature requirements.

Q: Are these parts pin-compatible?

A: Yes. All three parts use the 20-SSOP package with identical pinout and footprint dimensions (0.209", 5.30mm Width).

Q: Do these substitutes maintain the same compliance certifications?

A: Yes. Both PIC16F628-04E/SS and PIC16F628-04I/SS are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 moisture sensitivity rating, matching the original part's compliance profile.

Q: What is the availability status of these substitutes?

A: PIC16F628-04E/SS and PIC16F628-04I/SS are both active products with current production and inventory availability, unlike the obsolete PIC16F628T-04E/SS.

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