PIC16C57-LPI/SP Equivalent & Substitute Parts

Part Overview

The PIC16C57-LPI/SP 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-SPDIP package. This device is actively produced and widely used in embedded applications requiring fixed firmware implementation. Finding equivalent or substitute parts becomes necessary when OTP memory limitations require reprogrammable alternatives, or when supply chain considerations demand functionally compatible options within the same package and pin configuration.

Substiute Parts

PIC16C57-LPI/SP

Microchip TechnologyIn Stock: 2418PIC16C57-LPI/SP Datasheet

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PIC16F57-I/SP

Microchip TechnologyIn Stock: 2114PIC16F57-I/SP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16C57-LPI/SP is determined by strict alignment of the following critical parameters:

• Core Processor Architecture: Must be PIC to ensure instruction set compatibility
• Core Size: Must remain 8-Bit for software and hardware interface compatibility
• Program Memory Size: Must be 3KB (2K x 12) to accommodate existing firmware
• RAM Size: Must be 72 x 8 to support application data structures
• Number of I/O Pins: Must be 20 to maintain circuit board layout and peripheral connections
• Package / Case: Must be 28-DIP (0.300", 7.62mm) for socket and PCB compatibility
• Mounting Type: Must be Through Hole for mechanical and electrical consistency
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Voltage Supply Range: Must support the application's supply voltage requirements

The PIC16F57-I/SP qualifies as a substitute because it maintains identical core architecture, memory capacity, I/O configuration, and package specifications. The primary difference is the program memory type: FLASH instead of OTP, which provides reprogrammability while preserving all other functional and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16C57-LPI/SP and PIC16F57-I/SP are active products from Microchip Technology with ROHS3 compliance and identical environmental operating ranges. Selection between these parts depends on application requirements:

PIC16C57-LPI/SP is appropriate for production applications where firmware is finalized and OTP memory provides cost efficiency and security through permanent code storage.

PIC16F57-I/SP is appropriate for development, prototyping, and applications requiring firmware updates or field reprogramming. The FLASH memory type enables in-circuit reprogramming without device replacement. Note that the maximum operating speed is 20MHz compared to 40MHz for the OTP variant, and the voltage supply range is 2V ~ 5.5V compared to 2.5V ~ 6.25V for the main part.

Both devices are suitable for applications operating within the overlapping voltage range of 2.5V ~ 5.5V and clock frequencies up to 20MHz.

Frequently Asked Questions (FAQ)

Q: Can PIC16F57-I/SP directly replace PIC16C57-LPI/SP in existing designs?

A: Yes, for applications operating at clock frequencies up to 20MHz and supply voltages between 2.5V and 5.5V. The identical pin count, package, and memory capacity ensure mechanical and electrical compatibility. Applications requiring the full 40MHz speed of the PIC16C57-LPI/SP cannot use the PIC16F57-I/SP as a direct substitute.

Q: What is the primary advantage of PIC16F57-I/SP over PIC16C57-LPI/SP?

A: The PIC16F57-I/SP uses FLASH memory instead of OTP, enabling in-circuit reprogramming and firmware updates without replacing the device. This is essential for development, field updates, and applications requiring code modifications.

Q: Are there any voltage supply considerations when substituting?

A: Yes. The PIC16C57-LPI/SP supports 2.5V ~ 6.25V, while the PIC16F57-I/SP supports 2V ~ 5.5V. Applications using supply voltages above 5.5V or below 2.5V cannot use the PIC16F57-I/SP. Both devices operate within the 2.5V ~ 5.5V overlap range.

Q: Do both parts use the same 28-DIP package?

A: Yes. Both the PIC16C57-LPI/SP and PIC16F57-I/SP use the 28-DIP (0.300", 7.62mm) through-hole package, ensuring identical PCB footprint and socket compatibility.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, have identical environmental operating temperature ranges (-40°C ~ 85°C), and are actively produced by Microchip Technology.