PIC16C55T-HS/SO Equivalent & Substitute Parts

Part Overview

The PIC16C55T-HS/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device operates at 20MHz with 768B of program memory and 24 x 8 bytes of RAM, housed in a 28-SOIC surface mount package. The part is currently active in production with verified programmability through DiGi-Electronics. Finding equivalent or substitute parts may be necessary due to inventory constraints, packaging preferences, or application requirements for enhanced memory capacity or wider operating temperature ranges.

Substiute Parts

PIC16C55T-HS/SO

Microchip TechnologyIn Stock: 1186PIC16C55T-HS/SO Datasheet

Current PartRFQ

PIC16C55-HS/SO

Microchip TechnologyIn Stock: 1019PIC16C55-HS/SO Datasheet

DirectRFQ

PIC16F57T-I/SO

Microchip TechnologyIn Stock: 3288PIC16F57T-I/SO Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PIC16C55T-HS/SO is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating speed (20MHz)
• Pin count and I/O configuration (20 I/O)
• Package type and dimensions (28-SOIC)
• Mounting type (Surface Mount)
• Peripheral set (POR, WDT)
• RoHS and MSL compliance

Allowable Variations:

• Program memory type (OTP to FLASH transition permitted for enhanced reprogrammability)
• Program memory capacity (768B to 3KB acceptable for backward compatibility)
• RAM size (24 x 8 to 72 x 8 acceptable for expanded data storage)
• Supply voltage range (4.5V ~ 5.5V to 2V ~ 5.5V acceptable for broader compatibility)
• Operating temperature range (0°C ~ 70°C to -40°C ~ 85°C acceptable for extended environmental operation)

Parameter Comparison

Engineering Selection Recommendations

PIC16C55-HS/SO (Direct Equivalent)

This part is a direct functional equivalent to the PIC16C55T-HS/SO, maintaining identical electrical specifications, memory configuration, and operating parameters. The primary distinction is packaging format (Tube versus the original specification). Both devices are ROHS3 compliant, carry MSL 1 rating, and are actively produced. Selection of this part is appropriate when packaging format is interchangeable with application requirements.

PIC16F57T-I/SO (Manufacturer Recommended Substitute)

The PIC16F57T-I/SO represents an enhanced alternative within the PIC 16-bit microcontroller family. This device maintains core architectural compatibility (8-bit, 20MHz, 20 I/O, 28-SOIC package) while providing expanded capabilities: FLASH memory (3KB versus 768B OTP), increased RAM (72 x 8 versus 24 x 8), and extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C). The supply voltage range is also broader (2V ~ 5.5V versus 4.5V ~ 5.5V). ROHS3 compliance and MSL 1 rating are maintained. This substitute is suitable for applications requiring reprogrammability, larger code space, or operation in extended temperature environments. The ECCN classification differs (EAR99 versus 3A991A2), which may affect export considerations.

Frequently Asked Questions (FAQ)

Q: Can PIC16C55-HS/SO directly replace PIC16C55T-HS/SO?

A: Yes. Both parts are functionally identical with matching electrical specifications, memory configuration, I/O count, and operating parameters. The difference is packaging format (Tube). Electrical and mechanical compatibility is complete.

Q: What are the advantages of using PIC16F57T-I/SO over PIC16C55T-HS/SO?

A: The PIC16F57T-I/SO offers three primary advantages: (1) FLASH memory technology enabling field reprogrammability versus one-time programming, (2) expanded program memory (3KB versus 768B) and RAM (72 x 8 versus 24 x 8) for larger applications, and (3) extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) for industrial and automotive environments.

Q: Are all three parts pin-compatible?

A: Yes. All three devices use the 28-SOIC package with identical pin count (20 I/O) and peripheral configuration (POR, WDT). Physical and electrical pin compatibility is maintained across all substitutes.

Q: What is the difference between OTP and FLASH memory in these devices?

A: OTP (One-Time Programmable) memory in the PIC16C55 series can be programmed once during manufacturing and cannot be erased or reprogrammed. FLASH memory in the PIC16F57 can be erased and reprogrammed multiple times, enabling field updates and development flexibility.

Q: Do supply voltage requirements differ between these parts?

A: The PIC16C55T-HS/SO and PIC16C55-HS/SO require 4.5V ~ 5.5V. The PIC16F57T-I/SO accepts a broader range of 2V ~ 5.5V, allowing operation at lower supply voltages and providing greater design flexibility.

Q: Are there export or compliance differences between these parts?

A: Both PIC16C55 variants carry ECCN 3A991A2, while the PIC16F57T-I/SO carries ECCN EAR99. HTSUS classification is identical (8542.31.0001). RoHS3 and MSL 1 compliance is maintained across all parts. Verify ECCN requirements for your specific export destination.

Q: Which part should I select for a new design?

A: For new designs, the PIC16F57T-I/SO is recommended due to FLASH reprogrammability, expanded memory, and extended temperature range. The PIC16C55 variants are suitable for legacy designs or applications with fixed code requirements and standard operating conditions.