PIC16F628T-04I/SO Equivalent & Substitute Parts

Part Overview

The PIC16F628T-04I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring low-cost, low-power control solutions. This device features 4.6KB of FLASH program memory, 224 bytes of RAM, and 128 bytes of EEPROM, with integrated peripherals including UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching core electrical specifications, memory configuration, I/O count, and package compatibility within the PIC® 16F microcontroller family.

Substiute Parts

PIC16F628T-04I/SO

Microchip TechnologyIn Stock: 828PIC16F628T-04I/SO Datasheet

Current PartRFQ

PIC16F628-04I/SO

Microchip TechnologyIn Stock: 5000345PIC16F628-04I/SO Datasheet

DirectRFQ

PIC16F628AT-I/SO

Microchip TechnologyIn Stock: 3366PIC16F628AT-I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PIC16F628T-04I/SO are identified based on the following critical parameters that determine functional interchangeability:

Core Electrical Specifications: All substitute parts must maintain identical core processor architecture (PIC), core size (8-Bit), program memory capacity (4.6KB FLASH), EEPROM size (128 x 8), and RAM size (224 x 8).

I/O and Connectivity: All parts must provide 16 I/O pins with UART/USART connectivity and identical peripheral support (Brown-out Detect/Reset, POR, PWM, WDT).

Voltage and Temperature Range: All parts must support the same supply voltage range (3V ~ 5.5V) and operating temperature range (-40°C ~ 85°C).

Package Compatibility: All parts must use the 18-SOIC surface mount package with identical physical dimensions (0.295", 7.50mm Width).

Compliance and Status: All parts must maintain active product status, RoHS3 compliance, and unlimited moisture sensitivity rating.

Variations in packaging format (Tape & Reel, Tube, Cut Tape & Digi-Reel®) and speed rating do not affect functional substitution when the above core parameters are matched.

Parameter Comparison

Engineering Selection Recommendations

All three parts—PIC16F628T-04I/SO, PIC16F628-04I/SO, and PIC16F628AT-I/SO—are active production devices from Microchip Technology with full RoHS3 compliance and verified programmability status. Selection between these parts is determined by application-specific speed requirements and packaging logistics.

PIC16F628T-04I/SO and PIC16F628-04I/SO are functionally identical 4MHz variants, differing only in packaging format. The primary distinction is supply chain availability: Tape & Reel packaging suits high-volume automated assembly, while Tube packaging accommodates lower-volume or manual assembly operations.

PIC16F628AT-I/SO operates at 20MHz, providing five times the clock speed of the 4MHz variants while maintaining identical memory, I/O, and peripheral architecture. This higher speed variant is suitable for applications requiring faster instruction execution or higher-frequency signal processing within the same physical footprint and power supply range.

All parts maintain unlimited moisture sensitivity rating and identical operating temperature range, ensuring equivalent reliability in standard industrial and commercial environments.

Frequently Asked Questions (FAQ)

Q: Can PIC16F628AT-I/SO replace PIC16F628T-04I/SO in existing designs?

A: Yes, with design verification. The PIC16F628AT-I/SO is pin-compatible and functionally equivalent, with identical memory, I/O count, and peripheral set. The 20MHz speed rating is a superset capability; applications designed for 4MHz operation will function correctly at the higher speed. Timing-critical code may require validation to ensure no unintended behavior occurs at the increased clock frequency.

Q: What is the difference between Tape & Reel, Tube, and Cut Tape packaging?

A: Packaging format affects supply chain and assembly logistics only. Tape & Reel (TR) is optimized for high-speed automated pick-and-place assembly. Tube packaging is used for lower-volume orders and manual handling. Cut Tape (CT) & Digi-Reel® provides intermediate flexibility. All three formats contain identical die and electrical specifications.

Q: Are all three parts RoHS3 compliant?

A: Yes. PIC16F628T-04I/SO, PIC16F628-04I/SO, and PIC16F628AT-I/SO all carry RoHS3 compliance certification and are REACH unaffected, meeting current environmental and regulatory requirements for commercial and industrial applications.

Q: What is the significance of the speed difference between 4MHz and 20MHz variants?

A: Speed rating indicates maximum clock frequency. The 4MHz variants (PIC16F628T-04I/SO and PIC16F628-04I/SO) are rated for operation up to 4MHz. The 20MHz variant (PIC16F628AT-I/SO) is rated for operation up to 20MHz. Both can operate at lower frequencies. Selection depends on application timing requirements and power consumption constraints.

Q: Are these parts suitable for battery-powered applications?

A: Yes. All three parts support the 3V ~ 5.5V supply range, enabling operation from single-cell lithium batteries (3V) through standard 5V logic supplies. The integrated brown-out detection and watchdog timer support low-power design practices.

Q: What is the moisture sensitivity level (MSL) rating?

A: All three parts carry MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts can be stored indefinitely without desiccant packaging and do not require baking before reflow soldering, simplifying manufacturing and inventory management.