PIC16C554T-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C554T-20E/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 896B of program memory, 80 x 8 bytes of RAM, and operates at 20MHz with a supply voltage range of 3V to 5.5V. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

PIC16C554T-20E/SS

Microchip TechnologyIn Stock: 983PIC16C554T-20E/SS Datasheet

Current PartRFQ

PIC16C554-20I/SS

Microchip TechnologyIn Stock: 910PIC16C554-20I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PIC16C554T-20E/SS is determined by strict alignment of the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Program Memory: 896B (512 x 14) OTP configuration
• RAM Configuration: 80 x 8 bytes
• Operating Speed: 20MHz
• I/O Count: 13 pins
• Supply Voltage Range: 3V ~ 5.5V
• Package Type: 20-SSOP form factor
• Peripheral Set: POR (Power-On Reset) and WDT (Watchdog Timer)

The PIC16C554-20I/SS qualifies as a direct substitute based on identical electrical specifications, memory configuration, pin count, and package format. The primary distinction lies in product status and operating temperature range, which do not affect functional compatibility in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C554-20I/SS serves as the direct substitute for the obsolete PIC16C554T-20E/SS. Both devices maintain identical electrical and functional specifications across all critical parameters including memory configuration, I/O architecture, and peripheral functionality. The substitute part carries Active product status, ensuring continued availability and supply chain support.

Both parts maintain ROHS3 compliance and carry identical MSL ratings, confirming compatibility in manufacturing environments. The operating temperature range difference (-40°C ~ 85°C for the substitute versus -40°C ~ 125°C for the original) should be evaluated against specific application requirements. For applications operating within the -40°C ~ 85°C window, the substitute provides full functional equivalence without design modification.

Frequently Asked Questions (FAQ)

Q: Can the PIC16C554-20I/SS directly replace the PIC16C554T-20E/SS without PCB modifications?

A: Yes. Both parts share identical pinout, package format (20-SSOP), and electrical specifications. No PCB layout changes are required for substitution.

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

A: The substitute part operates to 85°C maximum, while the original extends to 125°C. Applications requiring operation above 85°C ambient temperature must retain the original part or implement thermal management to maintain junction temperatures within the substitute's rated range.

Q: Are firmware or software changes necessary when switching to the substitute part?

A: No. Both devices implement identical PIC 8-bit architecture, memory organization, and peripheral configuration. Existing firmware requires no modification.

Q: How do the product status designations affect part selection?

A: The original part is classified as Obsolete, indicating discontinued manufacturing and limited future availability. The substitute carries Active status, confirming ongoing production and supply chain accessibility for current and future requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the PIC16C554T-20E/SS and PIC16C554-20I/SS maintain ROHS3 compliance, meeting environmental and regulatory requirements for commercial and industrial applications.