PIC16C57-HSI/P Equivalent & Substitute Parts

Part Overview

The PIC16C57-HSI/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 3KB of OTP (One-Time Programmable) memory and 20 I/O pins in a 28-DIP package. This device is designed for embedded applications requiring fixed firmware implementation. The part is currently active in production with verified programmability through DiGi-Electronics.

Finding equivalent or substitute parts becomes necessary when OTP memory limitations require reprogramming capability, when supply constraints affect availability, or when design requirements shift toward flash-based memory solutions that offer field reprogramming advantages.

Substiute Parts

PIC16C57-HSI/P

Microchip TechnologyIn Stock: 980PIC16C57-HSI/P Datasheet

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PIC16F57-I/P

Microchip TechnologyIn Stock: 4248PIC16F57-I/P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The PIC16F57-I/P qualifies as a direct substitute based on the following alignment of critical parameters:

Matching Parameters:

• Identical core processor architecture (PIC)
• Identical core size (8-Bit)
• Identical clock speed (20MHz)
• Identical program memory capacity (3KB / 2K x 12)
• Identical RAM size (72 x 8)
• Identical I/O pin count (20)
• Identical peripheral set (POR, WDT)
• Identical external oscillator requirement
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package form factor (28-DIP)
• Identical mounting type (Through Hole)

Key Difference: The primary distinction is the program memory type: PIC16C57-HSI/P uses OTP (One-Time Programmable) memory, while PIC16F57-I/P uses FLASH memory. This difference enables field reprogramming capability in the substitute part.

Voltage Supply Consideration: The PIC16F57-I/P operates across a wider voltage range (2V ~ 5.5V) compared to the PIC16C57-HSI/P (4.5V ~ 5.5V). This expanded range provides additional design flexibility without compromising compatibility in applications using the original 4.5V ~ 5.5V specification.

Parameter Comparison

Engineering Selection Recommendations

PIC16C57-HSI/P remains the appropriate choice for applications where:

• Firmware is finalized and does not require field updates
• OTP memory cost optimization is a primary design constraint
• Supply availability meets production requirements

PIC16F57-I/P is the suitable selection for applications requiring:

• Field reprogramming capability after deployment
• Extended voltage supply range operation (2V ~ 5.5V)
• Design flexibility for firmware updates or multiple firmware variants
• Higher inventory availability (4200 units in stock versus 885 units)

Both parts maintain identical RoHS3 compliance, REACH unaffected status, and EAR99 export classification. The electrical and mechanical compatibility is complete, with no PCB layout or schematic modifications required for substitution within the specified voltage operating range.

Frequently Asked Questions (FAQ)

Q: Can PIC16F57-I/P directly replace PIC16C57-HSI/P in existing designs?

A: Yes. The PIC16F57-I/P is electrically and mechanically compatible. Both devices share identical pinout, package dimensions (28-DIP), core architecture, clock speed (20MHz), I/O count (20), and peripheral configuration (POR, WDT). No PCB modifications are required. The wider voltage range of PIC16F57-I/P (2V ~ 5.5V) is backward compatible with designs specified for 4.5V ~ 5.5V operation.

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

A: The program memory type differs. PIC16C57-HSI/P uses OTP (One-Time Programmable) memory, which cannot be erased or reprogrammed after initial programming. PIC16F57-I/P uses FLASH memory, which supports multiple erase and reprogram cycles, enabling field updates and firmware modifications.

Q: Are there any compatibility concerns with the 28-DIP package?

A: No. Both parts use identical 28-DIP (0.600", 15.24mm) through-hole packaging. Socket compatibility, PCB footprints, and assembly processes are identical.

Q: Do both parts operate across the same temperature range?

A: Yes. Both the PIC16C57-HSI/P and PIC16F57-I/P operate from -40°C to 85°C (TA), ensuring thermal compatibility in equivalent environmental conditions.

Q: What are the memory specifications for both devices?

A: Both devices feature 3KB (2K x 12) program memory and 72 x 8 RAM. The difference is program memory type: OTP versus FLASH. This does not affect memory capacity or access characteristics.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. No regulatory differences exist between the two devices.