PIC16C558-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C558-20E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP program memory, 128 bytes of RAM, and 13 I/O pins. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design considerations where legacy compatibility is required.

Substiute Parts

PIC16C558-20E/SS

Microchip TechnologyIn Stock: 752PIC16C558-20E/SS Datasheet

Current PartRFQ

PIC16C558-20I/SS

Microchip TechnologyIn Stock: 934PIC16C558-20I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PIC16C558-20E/SS is determined by strict equivalence across the following critical parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating speed (20MHz)
• Program memory capacity and type (4.6KB OTP)
• RAM capacity (128 x 8)
• I/O pin count (13)
• Supply voltage range (3V ~ 5.5V)
• Package type and dimensions (20-SSOP)
• Peripheral features (POR, WDT)

The PIC16C558-20I/SS qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary distinction is the operating temperature range and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C558-20I/SS is a direct electrical and mechanical equivalent to the PIC16C558-20E/SS. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The primary consideration for selection is product status: the PIC16C558-20E/SS is obsolete, while the PIC16C558-20I/SS maintains active status. For new designs or ongoing production requiring this microcontroller class, the PIC16C558-20I/SS is the appropriate selection.

The operating temperature range differs between the two parts: the -20E variant supports -40°C to 125°C, while the -20I variant supports -40°C to 85°C. Applications requiring operation above 85°C must retain the -20E variant if available, or evaluate alternative microcontroller solutions.

Frequently Asked Questions (FAQ)

Q: Can PIC16C558-20I/SS replace PIC16C558-20E/SS in existing designs?

A: Yes, for applications operating within the -40°C to 85°C temperature range. The electrical specifications, memory configuration, I/O count, and package dimensions are identical. Verify your application's maximum operating temperature requirement before substitution.

Q: What is the difference between the -20E and -20I designations?

A: The suffix indicates the operating temperature range. The -20E supports extended temperature operation (-40°C to 125°C), while the -20I supports industrial temperature range (-40°C to 85°C). Both operate at 20MHz with identical memory and peripheral configurations.

Q: Are both parts in the same package?

A: Yes. Both the PIC16C558-20E/SS and PIC16C558-20I/SS use the 20-SSOP package with identical dimensions (0.209" width, 5.30mm). PCB layout and footprints are directly compatible.

Q: Why is the PIC16C558-20E/SS classified as obsolete?

A: Microchip Technology has discontinued this device in favor of newer microcontroller architectures. The PIC16C558-20I/SS remains in active production and is the recommended source for this device class.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.31.0001).