PIC16C55AT-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C55AT-20E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 768B of OTP (One-Time Programmable) memory and operating at 20MHz. This device is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and component procurement. The part is housed in a 28-SSOP surface mount package and operates across an extended temperature range of -40°C to 125°C.

Substiute Parts

PIC16C55AT-20E/SS

Microchip TechnologyIn Stock: 841PIC16C55AT-20E/SS Datasheet

Current PartRFQ

PIC16C55A-20E/SS

Microchip TechnologyIn Stock: 998PIC16C55A-20E/SS Datasheet

DirectRFQ

PIC16C55A-20I/SS

Microchip TechnologyIn Stock: 1064PIC16C55A-20I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16C55AT-20E/SS is determined by strict equivalence across the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Memory Configuration: 768B OTP program memory (512 x 12), 25 x 8 RAM
• Operating Frequency: 20MHz
• I/O Count: 20 pins
• Supply Voltage Range: 3V ~ 5.5V
• Package Type: 28-SSOP form factor
• Peripheral Set: POR (Power-On Reset) and WDT (Watchdog Timer)

The identified substitute parts maintain identical electrical and mechanical specifications. Differences in product status (obsolete vs. active) and operating temperature ranges are noted but do not affect functional substitution within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

Both PIC16C55A-20E/SS and PIC16C55A-20I/SS are functionally equivalent to the PIC16C55AT-20E/SS across all critical electrical and mechanical parameters. The primary distinction is product status: the substitute parts are active components with verified programmability, whereas the original part is obsolete.

PIC16C55A-20E/SS maintains the full operating temperature range of -40°C to 125°C, matching the original specification. PIC16C55A-20I/SS operates within a narrower temperature range of -40°C to 85°C and is supplied in tube packaging. Both substitute parts carry ROHS3 compliance and MSL rating 1, consistent with the original device.

Selection between the two active substitutes depends on application temperature requirements and packaging preferences. For applications requiring the extended upper temperature limit of 125°C, PIC16C55A-20E/SS is the appropriate choice.

Frequently Asked Questions (FAQ)

Q: Can PIC16C55A-20E/SS directly replace PIC16C55AT-20E/SS?

A: Yes. Both parts share identical core architecture, memory configuration, operating frequency, I/O count, supply voltage range, and 28-SSOP package. The substitute is an active product with verified programmability.

Q: What is the difference between PIC16C55A-20E/SS and PIC16C55A-20I/SS?

A: The primary differences are operating temperature range and packaging. PIC16C55A-20E/SS operates from -40°C to 125°C, while PIC16C55A-20I/SS operates from -40°C to 85°C. PIC16C55A-20I/SS is supplied in tube packaging. All other electrical and mechanical specifications are identical.

Q: Why is the original PIC16C55AT-20E/SS classified as obsolete?

A: Product status reflects manufacturer lifecycle classification. Obsolete designation indicates the part is no longer in active production. Active equivalent parts are available for design continuity.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both PIC16C55A-20E/SS and PIC16C55A-20I/SS are ROHS3 compliant, matching the original part's compliance status.

Q: What is the MSL rating for these parts?

A: All three parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

Q: Can I use PIC16C55A-20I/SS in an application requiring -40°C to 125°C operation?

A: No. PIC16C55A-20I/SS is rated only to 85°C maximum. For applications requiring operation to 125°C, use PIC16C55A-20E/SS.