AT49F002N-90PI Equivalent & Substitute Parts

Part Overview

The AT49F002N-90PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PDIP package with 90 ns access time. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across industrial temperature ranges (-40°C to 85°C) and requires a 4.5V to 5.5V supply voltage.

Substiute Parts

AT49F002N-90PI

Microchip TechnologyIn Stock: 1189AT49F002N-90PI Datasheet

Current PartRFQ

SST39SF020A-70-4C-PHE

Microchip TechnologyIn Stock: 1837SST39SF020A-70-4C-PHE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT49F002N-90PI is determined by the following critical parameters:

• Memory capacity (2Mbit) and organization (256K x 8)
• Parallel interface architecture
• 32-DIP through-hole package compatibility
• Supply voltage range (4.5V ~ 5.5V)
• Pin-to-pin compatibility

The SST39SF020A-70-4C-PHE meets all electrical and mechanical substitution criteria. While this substitute offers improved access time (70 ns versus 90 ns) and faster write cycle time (20µs versus 50µs), the operating temperature range differs (0°C ~ 70°C versus -40°C ~ 85°C), which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the qualified substitute for the AT49F002N-90PI based on electrical and mechanical compatibility. Key selection factors include:

• Both parts share identical memory capacity, organization, and parallel interface architecture
• Pin-to-pin compatibility is maintained within the 32-DIP package
• Supply voltage requirements are identical (4.5V ~ 5.5V)
• The substitute part is currently in active production status, ensuring long-term availability
• The SST39SF020A-70-4C-PHE achieves ROHS3 compliance, whereas the original part is non-compliant

Temperature range differences must be evaluated against application operating conditions. The substitute operates within 0°C to 70°C, which is narrower than the original part's -40°C to 85°C range. Applications requiring extended temperature operation below 0°C or above 70°C require alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE directly replace the AT49F002N-90PI in existing designs?

A: Yes, for applications operating within 0°C to 70°C. Both parts are pin-compatible 32-DIP packages with identical memory capacity and parallel interface. Verify your application's temperature requirements before substitution.

Q: What are the performance differences between these parts?

A: The SST39SF020A-70-4C-PHE provides faster access time (70 ns versus 90 ns) and significantly faster write cycle time (20µs versus 50µs). These improvements are backward-compatible with designs expecting the original part's timing specifications.

Q: Are there compliance differences between the two parts?

A: Yes. The SST39SF020A-70-4C-PHE is ROHS3 compliant, while the AT49F002N-90PI is non-compliant. Both parts are REACH unaffected and carry EAR99 classification.

Q: What is the package compatibility between these parts?

A: Both parts use identical 32-DIP (0.600", 15.24mm) through-hole packaging. No PCB layout modifications are required for substitution.

Q: Why is the AT49F002N-90PI classified as obsolete?

A: The part has reached end-of-life status. The SST39SF020A-70-4C-PHE represents the active production equivalent from the same manufacturer, ensuring continued availability and support.