PIC16C558-04E/P Equivalent & Substitute Parts

Part Overview

The PIC16C558-04E/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP (One-Time Programmable) memory and operating at 4MHz. This device is classified as Active product status and is widely used in embedded applications requiring basic microcontroller functionality with one-time programmable memory.

Finding equivalent and substitute parts becomes necessary when the original PIC16C558-04E/P reaches end-of-life status, inventory constraints occur, or when design requirements call for enhanced capabilities such as reprogrammable memory, higher clock speeds, or expanded peripheral functionality. The PIC16F628A-E/P serves as the primary substitute, offering flash-based memory reprogrammability and extended features while maintaining package and core voltage compatibility.

Substiute Parts

PIC16C558-04E/P

Microchip TechnologyIn Stock: 801PIC16C558-04E/P Datasheet

Current PartRFQ

PIC16F628A-E/P

Microchip TechnologyIn Stock: 2291PIC16F628A-E/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16C558-04E/P is determined by the following critical parameters:

• Core Architecture: Both main and substitute parts must use the PIC core processor to ensure instruction set compatibility
• Core Size: 8-bit architecture is mandatory for functional equivalence
• Package Type: 18-DIP through-hole package ensures mechanical and pin compatibility
• Voltage Supply Range: 3V ~ 5.5V compatibility allows direct replacement in existing circuits
• Program Memory Size: 4.6KB (2K x 14) capacity must be maintained or exceeded
• Operating Temperature Range: -40°C ~ 125°C ensures thermal compatibility

The PIC16F628A-E/P qualifies as a substitute because it maintains all critical parameters while offering enhanced capabilities in memory type (FLASH vs. OTP), speed (20MHz vs. 4MHz), and peripheral integration.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F628A-E/P is qualified as a direct substitute for the PIC16C558-04E/P based on the following engineering criteria:

Compliance and Certification: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment in production environments.

Package Compatibility: Identical 18-DIP through-hole packaging (0.300", 7.62mm) enables direct socket replacement without PCB redesign.

Voltage Supply Compatibility: Both devices operate within the 3V ~ 5.5V supply range, allowing use in existing power distribution circuits without modification.

Memory Architecture: While the PIC16F628A-E/P uses FLASH memory instead of OTP, the identical 4.6KB program memory size ensures code capacity equivalence. FLASH memory provides the additional advantage of in-circuit reprogrammability.

Thermal Range: Matching -40°C ~ 125°C operating temperature range ensures functional equivalence across industrial and commercial temperature specifications.

Active Product Status: Both devices maintain Active product status, confirming ongoing manufacturer support and availability.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F628A-E/P directly replace the PIC16C558-04E/P in existing designs?

A: Yes. Both devices share identical package geometry (18-DIP), voltage supply range (3V ~ 5.5V), program memory size (4.6KB), and operating temperature range (-40°C ~ 125°C). Direct socket replacement is mechanically and electrically feasible.

Q: What are the key differences between these two devices?

A: The primary differences are memory type (OTP vs. FLASH), maximum clock speed (4MHz vs. 20MHz), RAM capacity (128 x 8 vs. 224 x 8), I/O count (13 vs. 16), and oscillator type (external vs. internal). The PIC16F628A-E/P offers enhanced capabilities while maintaining core compatibility.

Q: Does the PIC16F628A-E/P require different oscillator circuitry?

A: The PIC16F628A-E/P features an internal oscillator, whereas the PIC16C558-04E/P requires external oscillator circuitry. Designs using the substitute part may eliminate external oscillator components if the internal oscillator frequency meets application requirements.

Q: Are there any pin-count differences between these devices?

A: Both devices use 18-pin DIP packages. However, the PIC16F628A-E/P provides 16 I/O pins compared to 13 on the PIC16C558-04E/P. Additional I/O pins on the substitute part are available for expanded functionality without requiring package changes.

Q: What compliance certifications apply to both devices?

A: Both the PIC16C558-04E/P and PIC16F628A-E/P are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.