AT49F002-70PC Equivalent & Substitute Parts

Part Overview

The AT49F002-70PC is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-DIP package with 70 ns access time. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates within the 4.5V to 5.5V supply range and is suitable for applications requiring non-volatile parallel memory storage.

Substiute Parts

AT49F002-70PC

Microchip TechnologyIn Stock: 969AT49F002-70PC Datasheet

Current PartRFQ

SST39SF020A-70-4C-PHE

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT49F002-70PC is determined by the following critical parameters:

• Memory Capacity & Organization: Substitute parts must provide 2Mbit capacity in 256K x 8 organization to maintain functional equivalence
• Memory Interface: Parallel interface is mandatory for pin-compatible replacement
• Access Time: 70 ns specification must be met or exceeded (lower values acceptable)
• Package & Pinout: 32-DIP package with identical physical dimensions (0.600", 15.24mm) ensures mechanical and electrical compatibility
• Voltage Supply: 4.5V ~ 5.5V operating range must be supported
• Mounting Type: Through-hole mounting required for direct PCB compatibility

The SST39SF020A-70-4C-PHE meets all substitution criteria and is classified as an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the qualified substitute for the AT49F002-70PC based on the following factors:

• Functional Equivalence: Identical memory capacity, organization, interface type, access time, voltage range, and package configuration ensure direct replacement capability
• Product Status: The substitute is an active product with current manufacturing support, addressing the obsolescence of the original part
• Compliance Advantage: The SST39SF020A-70-4C-PHE achieves ROHS3 compliance, whereas the original part is RoHS non-compliant
• Performance Improvement: Write cycle time is reduced from 50µs to 20µs, providing faster programming operations without compromising compatibility
• Availability: Current inventory of 1764 units ensures supply continuity for production and maintenance applications

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE be used as a direct replacement for the AT49F002-70PC?

A: Yes. Both devices share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, 70 ns access time, 32-DIP package dimensions, and voltage supply range (4.5V ~ 5.5V). Pin compatibility and electrical characteristics are equivalent.

Q: What is the primary advantage of switching to the SST39SF020A-70-4C-PHE?

A: The substitute part is an active product with ongoing manufacturing support, eliminating obsolescence risk. Additionally, it achieves ROHS3 compliance and offers improved write cycle time (20µs versus 50µs).

Q: Are there any performance differences between these parts?

A: Access time and voltage supply specifications are identical. The SST39SF020A-70-4C-PHE provides faster write cycle time (20µs compared to 50µs), which is a performance improvement for programming operations.

Q: Is the 32-DIP package identical between both parts?

A: Yes. Both parts use 32-DIP packaging with 0.600" (15.24mm) body width, ensuring mechanical and electrical compatibility on existing PCBs.

Q: What is the operating temperature range for both parts?

A: Both the AT49F002-70PC and SST39SF020A-70-4C-PHE operate across 0°C to 70°C, maintaining thermal compatibility in equivalent applications.