PIC16LC55A-04I/P Equivalent & Substitute Parts

Part Overview

The PIC16LC55A-04I/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-power operation. This device features 768B of OTP (One-Time Programmable) memory, 25 x 8 bytes of RAM, and operates at 4MHz with a supply voltage range of 2.5V to 5.5V. The part is currently active in production and RoHS3 compliant. Substitute parts are identified when equivalent functional requirements can be met through alternative microcontroller models that maintain pin compatibility and core operational parameters while potentially offering enhanced specifications such as increased memory capacity or higher clock speeds.

Substiute Parts

PIC16LC55A-04I/P

Microchip TechnologyIn Stock: 688PIC16LC55A-04I/P Datasheet

Current PartRFQ

PIC16F57-I/P

Microchip TechnologyIn Stock: 4248PIC16F57-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC55A-04I/P is determined by the following critical parameters:

• Pin Compatibility: 28-DIP package with identical pinout and 20 I/O lines
• Core Architecture: PIC 8-bit processor maintaining instruction set compatibility
• Supply Voltage Range: Operating within 2.5V to 5.5V envelope
• Operating Temperature: -40°C to 85°C range
• Peripheral Set: Presence of Power-On Reset (POR) and Watchdog Timer (WDT)
• Mounting Type: Through-hole technology for PCB integration

The PIC16F57-I/P qualifies as a substitute based on these parameters. While it offers enhanced specifications (higher clock speed, FLASH memory instead of OTP, increased program and RAM capacity), it maintains full pin compatibility, identical I/O count, overlapping voltage supply range, and equivalent peripheral functionality.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16LC55A-04I/P and PIC16F57-I/P are active production parts with ROHS3 compliance and REACH unaffected status. The PIC16LC55A-04I/P remains the primary choice for applications with established designs and OTP memory requirements. The PIC16F57-I/P serves as a direct substitute when higher processing speed, increased program memory capacity, or FLASH reprogrammability is required. Both devices maintain identical pin configurations, I/O count, and peripheral functionality, ensuring mechanical and electrical compatibility in 28-DIP through-hole applications. Selection between these parts depends on application-specific memory and speed requirements rather than compatibility constraints.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F57-I/P directly replace the PIC16LC55A-04I/P in existing designs?

A: Yes. Both devices share identical 28-DIP pinouts, 20 I/O lines, and peripheral sets (POR, WDT). No PCB modifications are required for physical substitution.

Q: What are the key differences between these microcontrollers?

A: The PIC16F57-I/P operates at 20MHz versus 4MHz for the PIC16LC55A-04I/P, provides 3KB FLASH memory instead of 768B OTP, and includes 72 x 8 bytes of RAM compared to 25 x 8 bytes. The PIC16F57-I/P supports lower minimum supply voltage (2V versus 2.5V).

Q: Is the PIC16F57-I/P suitable for low-power applications?

A: Both devices operate within the same temperature range (-40°C to 85°C) and share overlapping supply voltage specifications. The choice between them depends on application power budget and processing requirements rather than thermal or voltage constraints.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Compliance status is equivalent between the two devices.

Q: What is the significance of OTP versus FLASH memory?

A: OTP memory in the PIC16LC55A-04I/P is programmed once during manufacturing. FLASH memory in the PIC16F57-I/P allows field reprogramming. This distinction affects development workflow and production processes but does not impact electrical compatibility.