PIC16LC558T-04/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC558T-04/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-power operation and basic I/O control. This device features 4.6KB of OTP (One-Time Programmable) memory, 128 bytes of RAM, and 13 I/O pins in a 20-SSOP surface mount package. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

PIC16LC558T-04/SS

Microchip TechnologyIn Stock: 1136PIC16LC558T-04/SS Datasheet

Current PartRFQ

PIC16LC558-04/SS

Microchip TechnologyIn Stock: 783PIC16LC558-04/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16LC558T-04/SS is determined by strict equivalence across the following critical parameters:

• Core processor architecture (PIC 8-bit)
• Program memory capacity (4.6KB OTP)
• RAM capacity (128 x 8)
• I/O pin count (13)
• Supply voltage range (2.5V ~ 5.5V)
• Operating temperature range (0°C ~ 70°C)
• Package type and pinout (20-SSOP)
• Peripheral set (POR, WDT)
• Oscillator configuration (External)

The substitute part PIC16LC558-04/SS meets all these criteria and represents a direct functional equivalent with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC558-04/SS is the direct substitute for the obsolete PIC16LC558T-04/SS. Both parts are manufactured by Microchip Technology and share identical electrical specifications, memory configuration, I/O architecture, and package geometry. The substitute part maintains active product status, ensuring continued availability and supply chain reliability.

Both parts comply with ROHS3 standards and carry REACH Unaffected classification, meeting current environmental and regulatory requirements. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints for storage and handling.

Selection of the PIC16LC558-04/SS over the obsolete variant eliminates supply discontinuity risk while maintaining full functional and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Are PIC16LC558T-04/SS and PIC16LC558-04/SS pin-compatible?

A: Yes. Both parts use the 20-SSOP package with identical pinout and electrical characteristics. Direct PCB substitution is supported without layout modifications.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. The PIC16LC558T-04/SS is obsolete, while PIC16LC558-04/SS is active. The packaging designation differs (tube vs. unspecified in the main part), but electrical and mechanical specifications are identical.

Q: Can I use PIC16LC558-04/SS in a design originally specified for PIC16LC558T-04/SS?

A: Yes. The substitute part meets all electrical, thermal, and mechanical requirements. No design changes are required.

Q: Are both parts RoHS compliant?

A: Yes. Both PIC16LC558T-04/SS and PIC16LC558-04/SS are ROHS3 compliant and REACH unaffected.

Q: What is the MSL rating for these parts?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Is the 4MHz speed fixed or configurable?

A: The 4MHz specification refers to the maximum operating frequency with an external oscillator. Actual operating speed depends on the external clock source provided to the device.