PIC16F84AT-20E/SS Equivalent & Substitute Parts

Part Overview

The PIC16F84AT-20E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, featuring 1.75KB FLASH program memory and operating at 20MHz. This device is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and production continuity. The part is housed in a 20-SSOP surface mount package and operates across an extended temperature range of -40°C to 125°C.

Substiute Parts

PIC16F84AT-20E/SS

Microchip TechnologyIn Stock: 834PIC16F84AT-20E/SS Datasheet

Current PartRFQ

PIC16F84A-20I/SS

Microchip TechnologyIn Stock: 2230PIC16F84A-20I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16F84AT-20E/SS is determined by strict equivalence across the following critical parameters:

• Core processor architecture (PIC 8-bit)
• Program memory capacity (1.75KB FLASH)
• EEPROM and RAM specifications (64 x 8 and 68 x 8 respectively)
• I/O pin count (13 pins)
• Operating voltage range (4V ~ 5.5V)
• Clock speed (20MHz)
• Package type and pinout (20-SSOP)
• Peripheral set (POR, WDT)

The PIC16F84A-20I/SS qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status: the original part is obsolete while the substitute is active, with verified programmability and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F84A-20I/SS is the direct functional equivalent for the obsolete PIC16F84AT-20E/SS. Both parts maintain identical electrical and mechanical specifications, ensuring pin-for-pin and code-compatible replacement.

Selection of the PIC16F84A-20I/SS is supported by:

• Active product status with confirmed availability (2220 pcs in stock versus 745 pcs for the obsolete part)
• Verified programmability certification
• Full ROHS3 compliance and REACH unaffected status matching the original part
• Identical packaging, pinout, and peripheral configuration
• Equivalent moisture sensitivity level (MSL 1)

The operating temperature range of the substitute (-40°C to 85°C) is narrower than the original part (-40°C to 125°C). Applications requiring operation above 85°C must evaluate this specification difference against system requirements.

Frequently Asked Questions (FAQ)

Q: Are the PIC16F84AT-20E/SS and PIC16F84A-20I/SS pin-compatible?

A: Yes. Both devices use the 20-SSOP package with identical pinout and I/O configuration (13 I/O pins). Direct socket replacement is possible without PCB modification.

Q: Can firmware written for the PIC16F84AT-20E/SS run on the PIC16F84A-20I/SS?

A: Yes. Both parts share identical core processor architecture, memory organization (1.75KB FLASH, 64 x 8 EEPROM, 68 x 8 RAM), and peripheral set (POR, WDT). Firmware compatibility is maintained.

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

A: The substitute part operates from -40°C to 85°C, while the original operates to 125°C. For applications operating within the -40°C to 85°C range, this difference is not relevant. Applications requiring sustained operation above 85°C must confirm compatibility with system thermal requirements.

Q: Are there compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings (1 - Unlimited). Compliance certifications are equivalent.

Q: Why is the substitute part listed as "Active" while the original is "Obsolete"?

A: The PIC16F84A-20I/SS is the current production equivalent from Microchip Technology. The original PIC16F84AT-20E/SS has been discontinued. The substitute provides ongoing availability and support for this microcontroller architecture.

Q: What packaging difference exists between these parts?

A: The substitute is supplied in Tube packaging, while the original packaging specification is not detailed. Both use the same 20-SSOP case format. Packaging format does not affect electrical or mechanical compatibility.