PIC16C57-LPI/SO Equivalent & Substitute Parts

Part Overview

The PIC16C57-LPI/SO 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-SOIC 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 OTP memory limitations require reprogrammable alternatives, when supply constraints occur, or when design requirements shift toward FLASH-based solutions for field updates.

Substiute Parts

PIC16C57-LPI/SO

Microchip TechnologyIn Stock: 884PIC16C57-LPI/SO Datasheet

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PIC16F57-I/SO

Microchip TechnologyIn Stock: 55458PIC16F57-I/SO Datasheet

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Key Parameters

Substitute Part Grouping Explanation

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

Core Compatibility Requirements:

• Identical core processor architecture (PIC)
• Matching core size (8-Bit)
• Identical program memory capacity (3KB / 2K x 12)
• Matching RAM configuration (72 x 8)
• Identical I/O pin count (20)
• Compatible package type (28-SOIC)

Allowable Variations:

• Program memory type may transition from OTP to FLASH, enabling field reprogrammability
• Operating speed may be lower (downgrade acceptable)
• Supply voltage range may be narrower (subset of original range acceptable)
• Operating temperature range remains identical

The PIC16F57-I/SO qualifies as a direct substitute because it maintains all core compatibility requirements while upgrading the memory technology from OTP to FLASH.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16C57-LPI/SO and PIC16F57-I/SO are active products from Microchip Technology with full ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current production environments.

The PIC16F57-I/SO represents a functional upgrade path due to its FLASH memory technology, which enables in-circuit reprogrammability compared to the OTP limitation of the original device. This substitution is electrically and mechanically compatible within the specified operating parameters.

Selection between these devices depends on application requirements: retain the PIC16C57-LPI/SO for fixed-firmware, cost-optimized designs; select the PIC16F57-I/SO when field reprogramming capability, design iteration flexibility, or firmware updates are required.

Frequently Asked Questions (FAQ)

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

A: Yes, within the specified operating parameters. Both devices share identical core architecture, memory capacity, I/O configuration, and 28-SOIC package. The primary difference is memory technology (FLASH vs. OTP) and maximum operating speed (20MHz vs. 40MHz). Designs operating below 20MHz with supply voltages within 2V ~ 5.5V range experience no functional impact.

Q: What are the key differences between these parts?

A: Program memory type differs (OTP vs. FLASH), enabling field reprogramming on the PIC16F57-I/SO. Maximum clock speed is 40MHz for the PIC16C57-LPI/SO versus 20MHz for the PIC16F57-I/SO. Supply voltage range is wider on the original (2.5V ~ 6.25V) compared to the substitute (2V ~ 5.5V).

Q: Are there any package or pinout differences?

A: No. Both devices use identical 28-SOIC surface mount packaging with 0.295" width and 7.50mm body dimension. Pinout and I/O configuration are identical.

Q: Which device should be selected for new designs?

A: Selection depends on firmware update requirements. Choose PIC16F57-I/SO for designs requiring field reprogramming or multiple firmware revisions. Choose PIC16C57-LPI/SO only if maximum speed (40MHz) is a critical requirement and firmware is finalized.

Q: Are both devices currently available?

A: Yes. Both are active products with substantial inventory levels, ensuring supply continuity for production and development.