PIC16C54AT-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C54AT-20E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device features 768B of program memory, 25 x 8 bytes of RAM, and operates at 20MHz with a supply voltage range of 4.5V to 5.5V. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

PIC16C54AT-20E/SS

Microchip TechnologyIn Stock: 757PIC16C54AT-20E/SS Datasheet

Current PartRFQ

Key Parameters

Substitute Part Grouping Explanation

No direct substitute parts have been identified for the PIC16C54AT-20E/SS based on the provided substitute part list. Substitution of this microcontroller requires matching the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Program Memory: 768B OTP configuration (512 x 12)
• RAM Capacity: 25 x 8 bytes
• Operating Frequency: 20MHz maximum
• I/O Count: 12 I/O pins
• Supply Voltage: 4.5V to 5.5V range
• Package Format: 20-SSOP surface mount
• Memory Type: OTP (One-Time Programmable)

Alternative components must satisfy all these parameters simultaneously to ensure functional and pin-compatible replacement.

Parameter Comparison

No substitute parts are available for comparison at this time.

Engineering Selection Recommendations

The PIC16C54AT-20E/SS is an obsolete product. For applications currently using this microcontroller, the following engineering approach is recommended:

• Existing Inventory: Current stock of 714 pieces supports ongoing maintenance and repair of legacy systems.
• New Designs: Transition to current-generation PIC microcontroller families that maintain architectural compatibility while offering extended product lifecycle support.
• Compliance: The device maintains ROHS3 compliance and REACH unaffected status, suitable for regulated applications.
• Certification: ECCN classification as EAR99 applies to export considerations.

Frequently Asked Questions (FAQ)

Q: Can I use a different PIC microcontroller as a direct replacement? A: Direct replacement requires matching all specified parameters: 8-bit core, 768B OTP memory, 25 x 8 RAM, 20MHz operation, 12 I/O pins, and 20-SSOP package. Functional equivalents must be verified against the complete parameter set.

Q: What is the significance of the OTP memory type? A: OTP (One-Time Programmable) memory cannot be erased or reprogrammed after initial programming. This differs from flash or EEPROM variants. Replacement devices must use identical memory technology for compatibility.

Q: Is the 20-SSOP package critical for substitution? A: Yes. The 20-SSOP package defines the physical footprint and pin configuration. Substitutes must use the same package to ensure PCB compatibility without redesign.

Q: What does the obsolete status mean for component selection? A: Obsolete status indicates the manufacturer no longer produces this part. Existing inventory may be available through authorized distributors, but long-term availability is not guaranteed. New designs should specify current-generation alternatives.

Q: Are there compliance considerations for substitution? A: Yes. Any substitute must maintain ROHS3 compliance and REACH compliance status to meet regulatory requirements for the target application and market.