PIC16C54-LPE/SS Equivalent & Substitute Parts

Part Overview

The PIC16C54-LPE/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 768B of OTP (One-Time Programmable) memory and 12 I/O pins in a 20-SSOP surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and production continuity. The primary substitute maintains core electrical and mechanical compatibility while offering improved product status and availability.

Substiute Parts

PIC16C54-LPE/SS

Microchip TechnologyIn Stock: 902PIC16C54-LPE/SS Datasheet

Current PartRFQ

PIC16C54-LPI/SS

Microchip TechnologyIn Stock: 1012PIC16C54-LPI/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C54-LPE/SS is determined by strict equivalence across the following critical parameters:

Core Electrical Compatibility:

• Identical core processor architecture (PIC)
• Matching core size (8-Bit)
• Identical clock speed (40MHz)
• Identical program memory capacity and type (768B OTP)
• Identical RAM configuration (25 x 8)
• Identical I/O pin count (12)
• Identical peripheral set (POR, WDT)
• Identical oscillator requirement (External)

Mechanical & Package Compatibility:

• Identical mounting type (Surface Mount)
• Identical package designation (20-SSOP)
• Identical physical dimensions (0.209", 5.30mm Width)

Compliance & Environmental:

• RoHS3 compliance maintained
• MSL rating maintained (1 - Unlimited)
• Operating temperature range compatibility

The substitute part PIC16C54-LPI/SS meets all core electrical and mechanical requirements for direct substitution. Voltage supply range and operating temperature specifications show minor variations that do not preclude functional equivalence within standard application parameters.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C54-LPI/SS is the direct equivalent substitute for the obsolete PIC16C54-LPE/SS. Selection criteria are based on the following factors:

Product Status & Availability: The main part is classified as obsolete, while the substitute maintains active product status with verified programmability and higher inventory availability (941 units versus 863 units). This ensures long-term supply chain reliability and continued manufacturing support.

Compliance & Certification: Both parts maintain identical RoHS3 compliance and REACH unaffected status, with matching MSL ratings (1 - Unlimited). ECCN and HTSUS classifications are identical, ensuring regulatory equivalence.

Electrical & Functional Equivalence: Core processor architecture, memory configuration, I/O count, and peripheral set are identical. The substitute supports the full voltage supply range of the original part (2.5V minimum is common; 6.25V maximum on substitute exceeds the 6V specification of the original). Operating temperature range on the substitute (−40°C to 85°C) is narrower than the original (−40°C to 125°C); applications requiring operation above 85°C require evaluation against specific thermal requirements.

Mechanical Compatibility: Identical 20-SSOP package dimensions and surface mount configuration ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can PIC16C54-LPI/SS be used as a direct replacement for PIC16C54-LPE/SS in existing designs?

A: Yes, for applications operating within the temperature range of −40°C to 85°C. The substitute maintains identical core processor architecture, memory configuration, I/O pin count, and package dimensions. If your application requires operation above 85°C, thermal performance must be evaluated against the original specification of 125°C maximum.

Q: What is the difference between the voltage supply ranges?

A: The original part specifies 2.5V to 6V, while the substitute specifies 2.5V to 6.25V. The substitute's upper limit exceeds the original specification, providing additional margin. Both parts operate within the same minimum voltage threshold, ensuring compatibility in standard supply configurations.

Q: Are there any programming or firmware compatibility issues?

A: No. Both parts use identical OTP memory architecture (768B, 512 x 12 configuration) and the same PIC core processor. Firmware compiled for the PIC16C54-LPE/SS executes identically on the PIC16C54-LPI/SS without modification.

Q: Why is the operating temperature range different?

A: The substitute part specifies a narrower operating temperature range (−40°C to 85°C versus −40°C to 125°C). This reflects the product's thermal design specifications. For applications requiring operation above 85°C, the original part specifications must be maintained or alternative solutions evaluated.

Q: Are the packages physically identical?

A: Yes. Both parts use the 20-SSOP package with identical dimensions (0.209" width, 5.30mm). No PCB layout modifications are required for substitution.

Q: What is the inventory status for each part?

A: The original PIC16C54-LPE/SS has 863 units in stock. The substitute PIC16C54-LPI/SS has 941 units in stock, providing higher availability for new orders and production runs.