PIC16C55A-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C55A-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-cost, compact solutions. This device features 768B of OTP (One-Time Programmable) memory, 25 x 8 bytes of RAM, and operates at 4MHz with a supply voltage range of 3V to 5.5V. The component is housed in a 28-SSOP surface mount package.

The PIC16C55A-04E/SS carries an Obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this microcontroller.

Substiute Parts

PIC16C55A-04E/SS

Microchip TechnologyIn Stock: 1061PIC16C55A-04E/SS Datasheet

Current PartRFQ

PIC16C55A-04I/SS

Microchip TechnologyIn Stock: 5649PIC16C55A-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C55A-04E/SS is determined by strict alignment of the following critical parameters:

• Core Processor Architecture: Must be PIC
• Core Size: Must be 8-Bit
• Operating Speed: Must be 4MHz
• Program Memory Configuration: Must be 768B (512 x 12) OTP
• RAM Configuration: Must be 25 x 8 bytes
• I/O Count: Must be 20 pins
• Supply Voltage Range: Must be 3V ~ 5.5V
• Package Type: Must be 28-SSOP with identical physical dimensions
• Peripherals: Must include POR and WDT

The PIC16C55A-04I/SS meets all substitution criteria, differing only in product status (Active vs. Obsolete) and operating temperature range specification.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C55A-04I/SS is a direct functional equivalent to the PIC16C55A-04E/SS. Both devices are manufactured by Microchip Technology and share identical electrical specifications, memory configurations, I/O architecture, and physical packaging.

The primary distinction is product lifecycle status: the PIC16C55A-04E/SS is classified as Obsolete, while the PIC16C55A-04I/SS maintains Active status with verified programmability. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

The operating temperature range differs: the main part specifies -40°C to 125°C, while the substitute specifies -40°C to 85°C. Applications requiring operation above 85°C must retain the original PIC16C55A-04E/SS specification. For standard industrial and commercial temperature ranges, the PIC16C55A-04I/SS provides equivalent performance with superior supply availability.

Frequently Asked Questions (FAQ)

Q: Can the PIC16C55A-04I/SS be used as a direct replacement for the PIC16C55A-04E/SS?

A: Yes, for applications operating within the -40°C to 85°C temperature range. Both parts share identical core architecture, memory configuration, I/O count, supply voltage specifications, and 28-SSOP packaging. The substitute part is currently in active production status.

Q: What is the significance of the operating temperature range difference?

A: The main part (PIC16C55A-04E/SS) is rated to 125°C, while the substitute (PIC16C55A-04I/SS) is rated to 85°C. If your application requires sustained operation above 85°C, the original part specification must be maintained. For standard industrial environments, the substitute is fully compatible.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 28-SSOP package with identical physical dimensions (0.209" width, 5.30mm). Pinout and I/O configuration are identical, enabling direct PCB-level substitution without layout modifications.

Q: What compliance certifications apply to both parts?

A: Both the PIC16C55A-04E/SS and PIC16C55A-04I/SS are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Why is the PIC16C55A-04E/SS marked as Obsolete?

A: Obsolete status indicates the part has been discontinued by the manufacturer. The PIC16C55A-04I/SS represents the active equivalent, ensuring continued availability and supply chain support for new designs and production runs.