PIC16C56AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C56AT-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 1.5KB OTP program memory, 25 x 8 bytes of RAM, and 12 I/O pins. Designed for embedded applications requiring low-cost, compact control logic, this device operates at 4MHz with a supply voltage range of 3V to 5.5V and is housed in a 20-SSOP surface mount package.

The PIC16C56AT-04E/SS carries an Obsolete product status. Locating equivalent or substitute parts is necessary to support legacy system maintenance, design updates, or when original inventory becomes unavailable. Active alternatives with identical or compatible electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

PIC16C56AT-04E/SS

Microchip TechnologyIn Stock: 826PIC16C56AT-04E/SS Datasheet

Current PartRFQ

PIC16C56A-04E/SS

Microchip TechnologyIn Stock: 1127PIC16C56A-04E/SS Datasheet

DirectRFQ

PIC16C56A-04I/SS

Microchip TechnologyIn Stock: 947PIC16C56A-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C56AT-04E/SS is determined by strict alignment of the following critical parameters:

• Core Processor & Architecture: Must be PIC processor family
• Core Size: Must be 8-Bit
• Program Memory: Must be 1.5KB (1K x 12) OTP
• RAM Configuration: Must be 25 x 8 bytes
• I/O Count: Must provide 12 I/O pins
• Operating Speed: Must support 4MHz operation
• Supply Voltage Range: Must support 3V ~ 5.5V
• Package Type: Must be 20-SSOP with identical physical dimensions (0.209", 5.30mm Width)
• Peripherals: Must include POR and WDT functionality

Substitute parts are grouped based on product status (Active vs. Obsolete) and operating temperature range variations. All substitutes maintain identical electrical specifications and package compatibility with the main part.

Parameter Comparison

Engineering Selection Recommendations

PIC16C56A-04E/SS is the primary substitute for the obsolete PIC16C56AT-04E/SS. This part maintains identical electrical specifications, package configuration, and operating temperature range (-40°C ~ 125°C). The transition from Obsolete to Active product status ensures long-term availability and supply chain continuity. Both parts are ROHS3 compliant and carry MSL rating 1, indicating equivalent environmental handling requirements.

PIC16C56A-04I/SS is an alternative substitute with the same core functionality and package type. This part differs in operating temperature range, rated to -40°C ~ 85°C, which is narrower than the main part. Selection of this variant is appropriate for applications operating within the -40°C to 85°C temperature window. The part is supplied in Tube packaging and maintains Active product status with verified programmability.

Both substitutes are manufactured by Microchip Technology and comply with REACH and EAR99 export classifications, matching the regulatory profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can PIC16C56A-04E/SS directly replace PIC16C56AT-04E/SS in existing designs?

A: Yes. The PIC16C56A-04E/SS is a direct functional and mechanical substitute. All electrical parameters, memory configuration, I/O count, package dimensions, and peripheral features are identical. The part operates across the same supply voltage range (3V ~ 5.5V) and temperature range (-40°C ~ 125°C).

Q: What is the difference between PIC16C56A-04E/SS and PIC16C56A-04I/SS?

A: Both parts are electrically and mechanically identical with one exception: operating temperature range. PIC16C56A-04E/SS is rated -40°C ~ 125°C, while PIC16C56A-04I/SS is rated -40°C ~ 85°C. Additionally, PIC16C56A-04I/SS is supplied in Tube packaging. Select PIC16C56A-04I/SS only if your application operates within the narrower temperature range.

Q: Why is the original PIC16C56AT-04E/SS marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The PIC16C56A-04E/SS and PIC16C56A-04I/SS are Active alternatives that provide identical functionality and ensure continued availability for legacy system support and new designs.

Q: Are all three parts housed in the same package?

A: Yes. All three parts use the 20-SSOP package with identical physical dimensions (0.209", 5.30mm Width). PCB footprints and assembly processes are interchangeable.

Q: Do the substitute parts have the same compliance certifications?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. MSL rating is 1 (Unlimited) for all variants, indicating identical moisture sensitivity and storage requirements.