PIC16LC54AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC54AT-04E/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 operates at 4MHz with a supply voltage range of 3V to 6.25V and includes integrated Power-On Reset (POR) and Watchdog Timer (WDT) peripherals.

The PIC16LC54AT-04E/SS is classified as obsolete. Locating equivalent substitute parts is necessary to support legacy system maintenance, design updates, and production continuity where this microcontroller is specified in existing applications.

Substiute Parts

PIC16LC54AT-04E/SS

Microchip TechnologyIn Stock: 813PIC16LC54AT-04E/SS Datasheet

Current PartRFQ

PIC16LC54A-04I/SS

Microchip TechnologyIn Stock: 2162PIC16LC54A-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16LC54AT-04E/SS is determined by strict equivalence across the following critical parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating speed (4MHz)
• Program memory capacity and type (768B OTP)
• RAM configuration (25 x 8)
• I/O pin count (12)
• Supply voltage range (3V ~ 6.25V)
• Peripheral set (POR, WDT)
• Package type and dimensions (20-SSOP)
• Compliance certifications (ROHS3, MSL 1)

The PIC16LC54A-04I/SS meets all these criteria and qualifies as a direct substitute. Both devices share identical core architecture, memory configuration, I/O capability, and package specifications. Differences in product status (obsolete vs. active), operating temperature range, and packaging format (tube vs. unspecified) do not affect functional substitutability in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC54A-04I/SS is a qualified substitute for the PIC16LC54AT-04E/SS based on functional and electrical equivalence. Both devices are ROHS3 compliant and carry MSL 1 rating, meeting environmental and reliability standards.

The primary distinction is product status: the original part is obsolete while the substitute is active, ensuring ongoing availability and supply chain support. The substitute's operating temperature range (-40°C to 85°C) is narrower than the original (-40°C to 125°C); applications requiring operation above 85°C must evaluate this limitation against specific thermal requirements.

Selection of the PIC16LC54A-04I/SS is appropriate for new designs, production restarts, and legacy system support where the narrower temperature range does not conflict with application specifications.

Frequently Asked Questions (FAQ)

Q: Can the PIC16LC54A-04I/SS replace the PIC16LC54AT-04E/SS in existing designs?

A: Yes. Both devices share identical core architecture, memory configuration, I/O capability, and package specifications. Functional substitution is direct provided the application's operating temperature requirement does not exceed 85°C.

Q: What is the significance of the operating temperature difference?

A: The original part operates to 125°C; the substitute operates to 85°C. Applications designed for the full -40°C to 125°C range must confirm that 85°C maximum is acceptable for their thermal environment.

Q: Are the package dimensions identical?

A: Yes. Both parts use 20-SSOP packaging with identical dimensions (0.209", 5.30mm width). PCB footprints and mechanical mounting are interchangeable.

Q: What does "obsolete" product status mean for the original part?

A: Obsolete status indicates the PIC16LC54AT-04E/SS is no longer manufactured or supported by Microchip Technology. The active substitute ensures continued availability for production and maintenance applications.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the PIC16LC54AT-04E/SS and PIC16LC54A-04I/SS carry ROHS3 compliance certification and MSL 1 rating.

Q: What is the difference between the packaging formats (tube vs. unspecified)?

A: Packaging format refers to the shipping and handling container. Tube packaging is a standard reel format for automated assembly. This difference does not affect component functionality or electrical performance.