PIC16LC54A-04I/P Equivalent & Substitute Parts

Part Overview

The PIC16LC54A-04I/P 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. 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 product is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity.

Substiute Parts

PIC16LC54A-04I/P

Microchip TechnologyIn Stock: 1059PIC16LC54A-04I/P Datasheet

Current PartRFQ

PIC16F54-I/P

Microchip TechnologyIn Stock: 8691PIC16F54-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PIC16F54-I/P qualifies as a direct substitute based on the following alignment of critical parameters:

• Core Processor & Architecture: Both devices use the PIC core processor with identical 8-bit architecture
• Memory Organization: Both feature 768B program memory (512 x 12) and 25 x 8 RAM configuration
• I/O Count: Both provide 12 I/O pins
• Peripherals: Both include POR and WDT functionality
• Operating Temperature: Both operate across -40°C to 85°C
• Package: Both use 18-DIP (0.300", 7.62mm) through-hole packaging
• Compliance: Both are ROHS3 compliant with identical ECCN and HTSUS classifications

The primary differences are program memory type (OTP vs. FLASH), maximum speed (4MHz vs. 20MHz), and supply voltage range (3V–6.25V vs. 2V–5.5V), which represent functional enhancements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F54-I/P is a valid substitute for the obsolete PIC16LC54A-04I/P in applications requiring equivalent core functionality. Both devices maintain identical pin configurations, memory organization, and peripheral sets, ensuring direct compatibility at the circuit level.

The PIC16F54-I/P offers the advantage of active product status with current manufacturing support and availability. The FLASH memory type provides reprogrammability compared to the OTP limitation of the original device. The higher maximum speed (20MHz vs. 4MHz) and adjusted supply voltage range (2V–5.5V vs. 3V–6.25V) represent functional enhancements that do not compromise backward compatibility in designs operating within the overlapping voltage window (3V–5.5V).

Both devices maintain identical ROHS3 compliance and regulatory classifications (ECCN: EAR99, HTSUS: 8542.31.0001), ensuring consistent supply chain and export compliance.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F54-I/P directly replace the PIC16LC54A-04I/P in existing designs?

A: Yes. Both devices share identical pin counts (18-DIP), I/O configuration (12 pins), memory organization (768B program, 25 x 8 RAM), and peripheral sets (POR, WDT). The 18-DIP package dimensions (0.300", 7.62mm) are identical, enabling direct socket substitution.

Q: What are the key differences between these devices?

A: The primary differences are program memory type (OTP vs. FLASH), maximum operating speed (4MHz vs. 20MHz), and supply voltage range (3V–6.25V vs. 2V–5.5V). The PIC16F54-I/P offers reprogrammability and higher performance headroom while maintaining functional equivalence.

Q: Are there voltage compatibility concerns?

A: The supply voltage ranges overlap between 3V and 5.5V. Designs operating within this window experience no voltage-related compatibility issues. Designs requiring operation above 5.5V must retain the original PIC16LC54A-04I/P or redesign for the PIC16F54-I/P's maximum 5.5V specification.

Q: Does the higher speed of the PIC16F54-I/P affect circuit design?

A: No. The PIC16F54-I/P operates at a maximum of 20MHz but is fully backward compatible with 4MHz operation. Existing designs require no modification to accommodate the substitute device.

Q: Are both devices RoHS compliant?

A: Yes. Both the PIC16LC54A-04I/P and PIC16F54-I/P are ROHS3 compliant with identical regulatory classifications.