PIC16C56AT-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C56AT-20E/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. Operating at 20MHz with a supply voltage range of 3V to 5.5V, this device is designed for embedded applications requiring basic microcontroller functionality with external oscillator support.

The PIC16C56AT-20E/SS carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this microcontroller.

Substiute Parts

PIC16C56AT-20E/SS

Microchip TechnologyIn Stock: 1018PIC16C56AT-20E/SS Datasheet

Current PartRFQ

PIC16C56A-20I/SS

Microchip TechnologyIn Stock: 1149PIC16C56A-20I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C56AT-20E/SS is determined by the following critical parameters:

• Core Processor & Architecture: Must be PIC processor family
• Core Size: Must be 8-Bit
• Speed: Must support 20MHz operation
• Program Memory: Must provide minimum 1.5KB (1K x 12) OTP capacity
• RAM: Must provide minimum 25 x 8 bytes
• I/O Count: Must provide minimum 12 I/O pins
• Supply Voltage: Must support 3V ~ 5.5V range
• Package: Must be 20-SSOP form factor
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The PIC16C56A-20I/SS meets all substitution criteria as a direct equivalent, with identical electrical specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C56A-20I/SS is a direct functional equivalent to the PIC16C56AT-20E/SS. Both devices share identical electrical specifications, memory configuration, I/O capability, and package form factor. The primary distinction is product status: the main part is Obsolete while the substitute is Active, ensuring ongoing availability and supply chain continuity.

The operating temperature range of the substitute part (−40°C ~ 85°C) is narrower than the main part (−40°C ~ 125°C). Applications requiring operation above 85°C must evaluate this thermal limitation against system requirements.

Both parts maintain ROHS3 compliance and MSL 1 rating, supporting equivalent environmental and handling standards. The substitute part carries verified programmability status, confirming functional compatibility for development and production workflows.

Frequently Asked Questions (FAQ)

Q: Can the PIC16C56A-20I/SS directly replace the PIC16C56AT-20E/SS in existing designs?

A: Yes. Both devices are electrically and mechanically identical in all critical parameters: 8-bit architecture, 20MHz speed, 1.5KB OTP memory, 25 x 8 RAM, 12 I/O pins, 3V–5.5V supply range, and 20-SSOP package. Pin-for-pin compatibility is maintained.

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

A: The main part operates to 125°C while the substitute operates to 85°C. Applications requiring sustained operation above 85°C must confirm the substitute meets thermal requirements. Applications within the 85°C limit face no restriction.

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

A: No. Both parts maintain identical ROHS3 compliance status and MSL 1 moisture sensitivity rating. Environmental and handling requirements are equivalent.

Q: Why is the main part listed as Obsolete?

A: Obsolete status indicates the PIC16C56AT-20E/SS is no longer in active production. The PIC16C56A-20I/SS, with Active status, ensures continued component availability for new production and maintenance applications.

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

A: No. Both devices use the identical 20-SSOP package with 0.209" width and 5.30mm body dimension. Pinout and mechanical footprint are identical.