PIC16C54AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16C54AT-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 768B of OTP (One-Time Programmable) memory and 12 I/O pins in a 20-SSOP surface mount package. This device operates at 4MHz with a supply voltage range of 4.5V to 5.5V and includes integrated Power-On Reset (POR) and Watchdog Timer (WDT) peripherals.

The PIC16C54AT-04E/SS is classified as obsolete. Locating equivalent substitute parts is necessary for design continuity, system maintenance, and production support where original inventory is depleted or unavailable.

Substiute Parts

PIC16C54AT-04E/SS

Microchip TechnologyIn Stock: 990PIC16C54AT-04E/SS Datasheet

Current PartRFQ

PIC16C54A-04I/SS

Microchip TechnologyIn Stock: 2071PIC16C54A-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16C54AT-04E/SS is determined by strict equivalence across the following critical parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating speed (4MHz)
• Program memory capacity and type (768B OTP)
• RAM configuration (25 x 8)
• I/O pin count (12)
• Supply voltage range (4.5V ~ 5.5V)
• Peripheral set (POR, WDT)
• Package type and dimensions (20-SSOP)

The substitute part PIC16C54A-04I/SS meets all these criteria and is manufactured by the same supplier, ensuring functional and electrical compatibility within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The PIC16C54A-04I/SS is the qualified substitute for the obsolete PIC16C54AT-04E/SS. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The substitute part carries Active product status with verified programmability through DiGi-Electronics, ensuring ongoing availability and support.

The primary distinction is the operating temperature range: the substitute part operates from -40°C to 85°C, compared to the original part's -40°C to 125°C range. Selection should account for the specific thermal requirements of the target application. For applications operating within the -40°C to 85°C window, the PIC16C54A-04I/SS provides full functional equivalence with superior supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the PIC16C54A-04I/SS directly replace the PIC16C54AT-04E/SS in existing designs?

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 20-SSOP package dimensions. No circuit modifications are required.

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

A: The original part supports operation up to 125°C, while the substitute supports up to 85°C. If your application requires sustained operation above 85°C, the substitute part is not suitable. For standard industrial and commercial temperature ranges, this difference is not a limiting factor.

Q: Are there any package compatibility concerns?

A: No. Both parts use the 20-SSOP package with identical dimensions (0.209", 5.30mm width). PCB footprints and assembly processes remain unchanged.

Q: What is the inventory status of these parts?

A: The PIC16C54AT-04E/SS is obsolete with 929 units in stock. The PIC16C54A-04I/SS is active with 2040 units in stock, providing superior long-term availability.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the PIC16C54AT-04E/SS and PIC16C54A-04I/SS are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.