PIC16F84AT-04/SS Equivalent & Substitute Parts

Part Overview

The PIC16F84AT-04/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring 1.75KB FLASH program memory and basic I/O functionality. This device operates at 4MHz with 13 I/O pins and includes integrated Power-On Reset (POR) and Watchdog Timer (WDT) peripherals.

The PIC16F84AT-04/SS is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs or system updates.

Substiute Parts

PIC16F84AT-04/SS

Microchip TechnologyIn Stock: 1004PIC16F84AT-04/SS Datasheet

Current PartRFQ

PIC16F84A-04/SS

Microchip TechnologyIn Stock: 1138PIC16F84A-04/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16F84AT-04/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 (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)
• Peripheral set (POR, WDT)
• Package form factor (20-SSOP)
• Thermal operating range (0°C ~ 70°C)

The PIC16F84A-04/SS meets all these criteria and qualifies as a direct substitute. The primary distinction is product status: the PIC16F84AT-04/SS is obsolete, while the PIC16F84A-04/SS maintains active production status.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F84A-04/SS is the appropriate substitute for the obsolete PIC16F84AT-04/SS. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The PIC16F84A-04/SS maintains active production status, ensuring long-term component availability and supply chain stability. All electrical, thermal, and mechanical specifications are identical, enabling direct replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F84A-04/SS be used as a direct replacement for the PIC16F84AT-04/SS?

A: Yes. The PIC16F84A-04/SS is electrically and mechanically equivalent to the PIC16F84AT-04/SS across all specified parameters, including core architecture, memory configuration, I/O count, supply voltage, operating temperature range, and package form factor.

Q: What is the primary difference between these two parts?

A: The PIC16F84AT-04/SS is classified as obsolete, while the PIC16F84A-04/SS maintains active production status. This distinction affects component availability and long-term supply assurance.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and EAR99 export classification.

Q: Will the PIC16F84A-04/SS fit the same PCB footprint?

A: Yes. Both devices use the 20-SSOP package with identical dimensions (0.209" width, 5.30mm). No PCB layout modifications are required.

Q: Are firmware or software changes necessary when switching to the PIC16F84A-04/SS?

A: No. The instruction set, memory architecture, and peripheral functionality are identical. Existing firmware requires no modification.