PIC16C55-HSE/SS Equivalent & Substitute Parts

Part Overview

The PIC16C55-HSE/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device features 768B of program memory, 24 x 8 bytes of RAM, and 20 I/O pins, operating at 16MHz with an external oscillator. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

PIC16C55-HSE/SS

Microchip TechnologyIn Stock: 1186PIC16C55-HSE/SS Datasheet

Current PartRFQ

PIC16C55-HSI/SS

Microchip TechnologyIn Stock: 866PIC16C55-HSI/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C55-HSE/SS is determined by strict alignment of the following critical parameters:

Core Compatibility Parameters:

• Core Processor: PIC
• Core Size: 8-Bit
• Program Memory Size: 768B (512 x 12)
• Program Memory Type: OTP
• RAM Size: 24 x 8
• Number of I/O: 20
• Package / Case: 28-SSOP (0.209", 5.30mm Width)
• Voltage Supply Range: 4.5V ~ 5.5V
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Speed: May vary (16MHz or higher acceptable for backward compatibility)
• Operating Temperature Range: May vary (narrower ranges acceptable if application requirements are met)
• Product Status: Active status preferred for new designs; obsolete acceptable for legacy support

The substitute part PIC16C55-HSI/SS meets all core compatibility requirements while offering enhanced speed performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C55-HSI/SS is a direct substitute for the PIC16C55-HSE/SS based on identical core architecture, memory configuration, I/O count, and package specifications. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

The primary distinction is product status: the main part is obsolete while the substitute is active. For new designs and ongoing production, the PIC16C55-HSI/SS is the appropriate selection. The substitute operates at 20MHz compared to the main part's 16MHz, providing performance headroom for applications originally designed for 16MHz operation. The operating temperature range of the substitute (-40°C ~ 85°C) is narrower than the main part (-40°C ~ 125°C); applications requiring operation above 85°C must retain the original part or identify alternative solutions.

Both devices share identical supply voltage requirements (4.5V ~ 5.5V), identical 28-SSOP surface mount packaging, and equivalent peripheral features (POR, WDT).

Frequently Asked Questions (FAQ)

Q: Can the PIC16C55-HSI/SS replace the PIC16C55-HSE/SS in existing designs?

A: Yes. The substitute maintains identical core processor architecture, memory configuration (768B OTP program memory, 24 x 8 RAM), I/O count (20 pins), and 28-SSOP package specifications. The higher clock speed (20MHz vs. 16MHz) is backward compatible with designs operating at 16MHz.

Q: What is the difference between the HSE and HSI speed grades?

A: The HSE variant operates at 16MHz maximum clock frequency, while the HSI variant operates at 20MHz. Both are qualified for the same supply voltage range (4.5V ~ 5.5V) and package type (28-SSOP).

Q: Are there temperature range considerations for substitution?

A: The main part (PIC16C55-HSE/SS) operates from -40°C to 125°C, while the substitute (PIC16C55-HSI/SS) operates from -40°C to 85°C. Applications requiring operation above 85°C must use the original part or identify alternative solutions outside this product family.

Q: Do both parts have identical packaging and pin configurations?

A: Yes. Both the PIC16C55-HSE/SS and PIC16C55-HSI/SS use the 28-SSOP package with 0.209" width and 5.30mm body width. Pin count and I/O configuration are identical (20 I/O pins).

Q: What is the compliance status of the substitute part?

A: The PIC16C55-HSI/SS is ROHS3 compliant, REACH unaffected, and carries MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the main part.

Q: Why is the main part listed as obsolete?

A: The PIC16C55-HSE/SS is classified as obsolete by Microchip Technology. The PIC16C55-HSI/SS maintains active product status and is the recommended selection for new designs and ongoing production support.