PIC16F84AT-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F84AT-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 1.75KB FLASH program memory, 64 x 8 EEPROM, and 68 x 8 RAM. Designed for embedded applications requiring external oscillator operation at 4MHz, this device operates across the industrial temperature range of -40°C to 125°C. The part is currently classified as obsolete, making identification of compatible alternatives essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

PIC16F84AT-04E/SS

Microchip TechnologyIn Stock: 713PIC16F84AT-04E/SS Datasheet

Current PartRFQ

PIC16F84A-04I/SS

Microchip TechnologyIn Stock: 1960PIC16F84A-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F84AT-04E/SS is determined by strict alignment of the following critical parameters:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Program memory capacity and type (1.75KB FLASH)
• EEPROM and RAM configuration (64 x 8 and 68 x 8 respectively)
• I/O pin count (13)
• Supply voltage range (4V ~ 5.5V)
• Package type and physical dimensions (20-SSOP)
• Peripheral feature set (POR, WDT)
• External oscillator requirement

The PIC16F84A-04I/SS qualifies as a direct substitute based on complete alignment across all electrical and mechanical parameters. Differences in product status, operating temperature range, and packaging format do not affect functional substitutability in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F84A-04I/SS is the qualified substitute for the obsolete PIC16F84AT-04E/SS. Both parts maintain identical electrical specifications, memory configurations, I/O architecture, and package geometry. The substitute part carries active product status with verified programmability and maintains full ROHS3 and REACH compliance.

Selection of the PIC16F84A-04I/SS is appropriate for applications where the original part is no longer available. The substitute operates within the same supply voltage envelope and supports identical peripheral functionality. The operating temperature range of the substitute (-40°C to 85°C) covers standard industrial applications; designs requiring operation above 85°C must evaluate alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F84A-04I/SS directly replace the PIC16F84AT-04E/SS in existing designs?

A: Yes. Both parts share identical core architecture, memory capacity, I/O configuration, and 20-SSOP package dimensions. No circuit modifications are required for direct substitution.

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

A: The original part operates to 125°C; the substitute operates to 85°C. Applications requiring operation above 85°C must implement alternative solutions. Standard industrial and commercial applications operate within the substitute's temperature range.

Q: Are there packaging differences between these parts?

A: Both parts use 20-SSOP surface mount packaging with identical physical dimensions (0.209", 5.30mm width). The original part is supplied in standard packaging; the substitute is supplied in tube packaging. This does not affect electrical or mechanical compatibility.

Q: What compliance certifications apply to the substitute part?

A: The PIC16F84A-04I/SS maintains ROHS3 compliance and REACH unaffected status, matching the original part's regulatory standing.

Q: Is the substitute part programmable?

A: Yes. The PIC16F84A-04I/SS is verified as programmable through DiGi-Electronics channels.