PIC16LC54C-04/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC54C-04/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 768B of OTP (One-Time Programmable) memory and operating at 4MHz. This device is designed for embedded applications requiring low-cost, single-program solutions with 12 I/O pins and integrated peripherals including Power-On Reset (POR) and Watchdog Timer (WDT). The part is currently active in production with verified programmability through DiGi-Electronics. Finding equivalent or substitute parts may be necessary due to inventory constraints, application requirement changes, or the need for enhanced capabilities such as reprogrammable memory or extended operating temperature ranges.

Substiute Parts

PIC16LC54C-04/SS

Microchip TechnologyIn Stock: 1001PIC16LC54C-04/SS Datasheet

Current PartRFQ

PIC16F54-I/SS

Microchip TechnologyIn Stock: 3010PIC16F54-I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC54C-04/SS is determined by the following critical parameters:

Memory Architecture Compatibility: Both the main part and substitute must maintain identical program memory size (768B / 512 x 12) and RAM configuration (25 x 8) to ensure code and data storage compatibility.

I/O Pin Count: The substitute must provide 12 I/O pins to maintain circuit board layout and application functionality.

Core Processor Family: The substitute must use the PIC core processor architecture to ensure instruction set compatibility.

Package and Pinout: The 20-SSOP package with identical pinout is required for direct board-level replacement without redesign.

Peripheral Set: The substitute must include POR and WDT peripherals as specified in the original design.

The PIC16F54-I/SS qualifies as a direct substitute based on these parameters. While it differs in program memory type (FLASH vs. OTP), maximum operating speed (20MHz vs. 4MHz), and operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C), these differences represent functional enhancements rather than incompatibilities. The FLASH memory type enables field reprogrammability, and the extended specifications provide greater design margin and operational flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The PIC16F54-I/SS is suitable as a direct substitute when the application can accommodate FLASH memory reprogrammability and does not require the specific thermal or speed constraints of the original PIC16LC54C-04/SS. Both parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification, ensuring regulatory consistency.

For OTP-Dependent Applications: If the application specifically requires OTP memory to prevent field reprogramming, the PIC16LC54C-04/SS remains the appropriate choice. The OTP characteristic cannot be replicated by FLASH-based alternatives.

For Extended Temperature Range: Applications requiring operation below 0°C or above 70°C should use the PIC16F54-I/SS, which supports -40°C ~ 85°C operation.

For Voltage Margin Considerations: The PIC16F54-I/SS extends the lower supply voltage limit to 2V, providing additional design margin compared to the 2.5V minimum of the PIC16LC54C-04/SS.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F54-I/SS be used as a drop-in replacement for the PIC16LC54C-04/SS?

A: Yes, from a pinout and package perspective. Both devices use the 20-SSOP package with identical pin assignments. However, the primary functional difference is memory type: the substitute uses FLASH memory instead of OTP. This means the PIC16F54-I/SS can be reprogrammed in the field, whereas the PIC16LC54C-04/SS cannot. Verify that your application does not depend on OTP memory characteristics before substitution.

Q: What are the key compatibility factors for substitution?

A: The critical parameters are: 8-bit core processor, 768B program memory (512 x 12), 25 x 8 RAM, 12 I/O pins, POR and WDT peripherals, 20-SSOP package, and surface mount configuration. The PIC16F54-I/SS matches all these requirements.

Q: Does the higher maximum speed of the PIC16F54-I/SS affect compatibility?

A: No. The PIC16F54-I/SS operates at up to 20MHz compared to 4MHz for the PIC16LC54C-04/SS. A faster device is backward compatible with applications designed for lower speeds. The substitute will function correctly in circuits designed for the original part's 4MHz operation.

Q: Are there voltage supply differences I should consider?

A: The PIC16LC54C-04/SS requires 2.5V ~ 5.5V, while the PIC16F54-I/SS operates at 2V ~ 5.5V. The substitute has a lower minimum voltage requirement, which is advantageous for battery-powered or low-voltage applications. Both are compatible with standard 3.3V and 5V supply rails.

Q: What is the significance of the different operating temperature ranges?

A: The PIC16LC54C-04/SS is rated for 0°C ~ 70°C, while the PIC16F54-I/SS supports -40°C ~ 85°C. If your application operates outside the 0°C ~ 70°C range, the substitute is required. For applications within the original range, both parts are suitable.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PIC16LC54C-04/SS and PIC16F54-I/SS are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Regulatory compliance is maintained with either part.

Q: What packaging options are available?

A: Both parts are supplied in 20-SSOP surface mount packages. The PIC16LC54C-04/SS is available in standard packaging, while the PIC16F54-I/SS is supplied in tube packaging. Both have MSL rating 1 (unlimited moisture sensitivity level).