AT49F002N-70PC Equivalent & Substitute Parts

Part Overview

The AT49F002N-70PC is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PDIP package with 70 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 the need for continued system support, maintenance, and new design implementations where this memory capacity and interface remain applicable.

Substiute Parts

AT49F002N-70PC

Microchip TechnologyIn Stock: 1343AT49F002N-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 of the AT49F002N-70PC is determined by strict equivalence across the following parameters:

• Memory capacity: 2Mbit (256K x 8 organization)
• Interface type: Parallel
• Access time: 70 ns maximum
• Supply voltage range: 4.5V ~ 5.5V
• Package: 32-DIP (0.600", 15.24mm)
• Mounting: Through Hole
• Operating temperature range: 0°C ~ 70°C

The SST39SF020A-70-4C-PHE meets all these criteria and is therefore a direct functional equivalent. Both devices share identical memory capacity, organization, interface, access time, voltage specifications, and physical packaging.

Parameter Comparison

*Write cycle time of 20µs on the substitute is faster than the original 50µs specification, providing improved performance without compromising compatibility.

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is a direct substitute for the AT49F002N-70PC based on electrical and mechanical parameter equivalence. The substitute device is currently in active production status, ensuring availability for new designs and ongoing system support.

The SST39SF020A-70-4C-PHE offers improved compliance status (ROHS3 Compliant versus RoHS non-compliant) and faster write cycle time (20µs versus 50µs), both of which represent enhancements over the original part without introducing compatibility issues. The substitute maintains identical memory capacity, organization, interface type, access time, supply voltage, operating temperature range, and physical packaging.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE be used as a direct replacement for the AT49F002N-70PC?

A: Yes. Both devices are 2Mbit parallel FLASH memory ICs with 256K x 8 organization, 70 ns access time, 32-DIP through-hole packaging, and 4.5V ~ 5.5V supply voltage specifications. Electrical and mechanical compatibility is confirmed across all critical parameters.

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

A: The AT49F002N-70PC specifies 50µs write cycle time, while the SST39SF020A-70-4C-PHE specifies 20µs. The faster write cycle time of the substitute does not create compatibility issues and represents improved performance.

Q: Are there any package or pinout differences?

A: No. Both devices use identical 32-DIP (0.600", 15.24mm) through-hole packaging. Physical and electrical pinout compatibility is maintained.

Q: What is the compliance difference between these parts?

A: The AT49F002N-70PC is RoHS non-compliant. The SST39SF020A-70-4C-PHE is ROHS3 Compliant. Both are REACH Unaffected and carry EAR99 ECCN classification.

Q: Is the substitute part currently available?

A: Yes. The SST39SF020A-70-4C-PHE is in active production status with current inventory availability, whereas the AT49F002N-70PC is obsolete.