PIC16C57-LPI/SS Equivalent & Substitute Parts

Part Overview

The PIC16C57-LPI/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 3KB OTP (One-Time Programmable) memory and 20 I/O pins in a 28-SSOP surface mount package. This device is actively produced and widely used in embedded applications requiring fixed firmware implementation.

Finding equivalent or substitute parts becomes necessary when the original part reaches end-of-life status, inventory constraints occur, or design requirements shift toward reprogrammable solutions. The PIC16F57-I/SS represents a direct functional upgrade path, offering FLASH memory technology in place of OTP, enabling field reprogramming capabilities while maintaining pin-compatible packaging and core processor architecture.

Substiute Parts

PIC16C57-LPI/SS

Microchip TechnologyIn Stock: 905PIC16C57-LPI/SS Datasheet

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PIC16F57-I/SS

Microchip TechnologyIn Stock: 2572PIC16F57-I/SS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C57-LPI/SS is determined by the following critical parameters:

Pin Compatibility: Both the main part and substitute must share identical pin counts (20 I/O) and package type (28-SSOP with 0.209" width, 5.30mm).

Memory Architecture: The core processor (PIC) and memory size (3KB / 2K x 12) must remain constant. The program memory type may transition from OTP to FLASH, as FLASH technology provides equivalent or superior functionality with added reprogrammability.

Electrical Specifications: RAM size (72 x 8), operating temperature range (-40°C ~ 85°C), and peripheral features (POR, WDT) must be maintained or exceeded.

Compliance & Status: Both parts must maintain active product status and equivalent RoHS/REACH compliance certifications.

The PIC16F57-I/SS qualifies as a direct substitute based on these criteria, with the primary distinction being the transition from OTP to FLASH memory technology.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F57-I/SS serves as a direct pin-compatible substitute for the PIC16C57-LPI/SS in applications where firmware reprogrammability is required or beneficial. Both devices maintain active product status with equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected).

Key considerations for selection:

Memory Technology Transition: The shift from OTP to FLASH memory enables field programming and firmware updates without component replacement. This is functionally superior for development, testing, and field service scenarios.

Operating Voltage Range: The PIC16F57-I/SS operates within 2V ~ 5.5V, which is a subset of the PIC16C57-LPI/SS range (2.5V ~ 6.25V). Designs operating below 2.5V or above 5.5V require retention of the original part.

Speed Specification: The PIC16C57-LPI/SS operates at 40MHz, while the PIC16F57-I/SS operates at 20MHz. Applications with timing-critical requirements exceeding 20MHz must use the original part.

Packaging & Compliance: Both parts are identical in physical package dimensions, mounting type, and environmental compliance, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Are the PIC16C57-LPI/SS and PIC16F57-I/SS pin-compatible?

A: Yes. Both devices use the 28-SSOP package with identical pin counts (20 I/O) and pin assignments, enabling direct PCB substitution without layout modifications.

Q: What is the primary functional difference between these parts?

A: The PIC16C57-LPI/SS uses OTP (One-Time Programmable) memory, while the PIC16F57-I/SS uses FLASH memory. FLASH memory allows multiple reprogramming cycles, whereas OTP memory is programmed once during manufacturing.

Q: Can I use the PIC16F57-I/SS as a drop-in replacement for the PIC16C57-LPI/SS?

A: Pin-wise, yes. However, verify that your application's operating voltage (2V ~ 5.5V for the substitute) and maximum clock speed (20MHz for the substitute) requirements are met. If your design requires operation above 5.5V or faster than 20MHz, the original part must be retained.

Q: What are the memory specifications for both parts?

A: Both devices feature 3KB (2K x 12) program memory and 72 x 8 RAM. The difference lies in program memory type: OTP for the PIC16C57-LPI/SS and FLASH for the PIC16F57-I/SS.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PIC16C57-LPI/SS and PIC16F57-I/SS are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: What is the moisture sensitivity level for these components?

A: Both parts have an MSL (Moisture Sensitivity Level) of 1 (Unlimited), indicating minimal moisture sensitivity and standard handling requirements.