AT49F002N-55PI Equivalent & Substitute Parts

Part Overview

The AT49F002N-55PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-DIP package with 55 ns access time. This device is classified as obsolete and is no longer in active production. Finding equivalent substitute parts is necessary due to discontinued status and limited remaining inventory. The SST39SF020A-70-4C-PHE serves as a direct functional equivalent with compatible electrical and mechanical specifications.

Substiute Parts

AT49F002N-55PI

Microchip TechnologyIn Stock: 940AT49F002N-55PI Datasheet

Current PartRFQ

SST39SF020A-70-4C-PHE

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT49F002N-55PI with the SST39SF020A-70-4C-PHE is valid based on the following alignment of critical parameters:

• Memory Capacity & Organization: Both devices provide 2Mbit capacity in 256K x 8 organization
• Interface Type: Both implement parallel FLASH memory interface
• Package Compatibility: Both use 32-DIP (0.600", 15.24mm) through-hole packaging
• Supply Voltage: Both operate within 4.5V ~ 5.5V range
• Technology: Both utilize FLASH memory technology with non-volatile storage

The SST39SF020A-70-4C-PHE is classified as an active product with current manufacturing status, making it suitable for new designs and ongoing production requirements.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the qualified substitute for the AT49F002N-55PI based on the following factors:

• Product Status: The substitute is actively manufactured, ensuring availability for current and future production runs
• Regulatory Compliance: The SST39SF020A-70-4C-PHE meets ROHS3 compliance requirements, whereas the original part is non-compliant
• Environmental Certifications: Both parts maintain REACH Unaffected and EAR99 ECCN classifications
• Functional Equivalence: Identical memory capacity, organization, interface type, and package form factor enable direct substitution in circuit designs
• Performance Characteristics: The substitute exhibits faster write cycle time (20µs vs. 50µs) and operates within a narrower temperature range (0°C ~ 70°C vs. -40°C ~ 85°C)

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE directly replace the AT49F002N-55PI in existing designs?

A: Yes. Both devices share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, supply voltage range (4.5V ~ 5.5V), and 32-DIP package form factor. Direct socket substitution is supported.

Q: What is the difference in access time between these parts?

A: The AT49F002N-55PI has 55 ns access time, while the SST39SF020A-70-4C-PHE has 70 ns access time. The substitute is 15 ns slower. Applications with strict timing requirements must verify compatibility with system clock specifications.

Q: Are there temperature range differences to consider?

A: Yes. The AT49F002N-55PI operates from -40°C to 85°C, while the SST39SF020A-70-4C-PHE operates from 0°C to 70°C. Applications requiring extended low-temperature operation below 0°C must evaluate alternative solutions.

Q: What is the packaging difference indicated by "Tube" for the substitute?

A: The SST39SF020A-70-4C-PHE is supplied in tube packaging, a standard distribution format for through-hole components. Both parts use identical 32-DIP physical packages suitable for PCB assembly.

Q: Does the substitute meet modern regulatory requirements?

A: The SST39SF020A-70-4C-PHE is ROHS3 compliant, meeting current environmental regulations. The original AT49F002N-55PI is non-compliant. New designs should utilize the compliant substitute.

Q: What is the write cycle time difference?

A: The AT49F002N-55PI requires 50µs per write cycle, while the SST39SF020A-70-4C-PHE requires 20µs. The substitute offers 2.5x faster write performance, which may improve overall system throughput in write-intensive applications.