AT49F002-12JC Equivalent & Substitute Parts

Part Overview

The AT49F002-12JC is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PLCC package with 120 ns access time. This device is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring non-volatile parallel memory storage.

Substiute Parts

AT49F002-12JC

Microchip TechnologyIn Stock: 892AT49F002-12JC Datasheet

Current PartRFQ

SST39VF020-70-4C-NHE

Microchip TechnologyIn Stock: 1715SST39VF020-70-4C-NHE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT49F002-12JC is determined by the following critical parameters:

• Memory capacity (2Mbit) and organization (256K x 8)
• Parallel memory interface architecture
• 32-PLCC package footprint compatibility
• Operating temperature range (0°C ~ 70°C)
• Surface mount mounting type

The SST39VF020-70-4C-NHE meets these core substitution criteria. While it operates at a lower supply voltage (2.7V ~ 3.6V) and faster access time (70 ns), these represent functional improvements rather than incompatibilities. The faster access time and lower voltage operation expand application flexibility without compromising backward compatibility with existing designs.

Parameter Comparison

Engineering Selection Recommendations

The AT49F002-12JC is obsolete and no longer in active production. The SST39VF020-70-4C-NHE is the recommended substitute, offering active product status and ROHS3 compliance. Both devices share identical memory capacity, organization, and parallel interface architecture, ensuring functional compatibility at the memory subsystem level.

The SST39VF020-70-4C-NHE provides superior performance characteristics with 70 ns access time versus 120 ns, and 20µs write cycle time versus 50µs. The lower supply voltage range (2.7V ~ 3.6V) requires verification of system power delivery architecture but represents an advantage for low-power applications.

For designs currently using the AT49F002-12JC, transition to the SST39VF020-70-4C-NHE is supported by identical pinout and package footprint. System-level validation is required to confirm voltage supply compatibility and timing margin adequacy.

Frequently Asked Questions (FAQ)

Q: Can the SST39VF020-70-4C-NHE directly replace the AT49F002-12JC?

A: Yes, at the package and pinout level. Both devices use 32-PLCC packaging with identical pin assignments for parallel FLASH memory operation. System-level integration requires verification of supply voltage compatibility and timing requirements.

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

A: The SST39VF020-70-4C-NHE operates at lower supply voltage (2.7V ~ 3.6V versus 4.5V ~ 5.5V) and provides faster access time (70 ns versus 120 ns). The AT49F002-12JC is obsolete; the SST39VF020-70-4C-NHE is in active production.

Q: Are there any compliance differences?

A: Yes. The SST39VF020-70-4C-NHE is ROHS3 compliant, while the AT49F002-12JC is RoHS non-compliant. Both are REACH unaffected and classified under ECCN EAR99.

Q: Does the faster access time of the substitute affect compatibility?

A: No. Faster access time is a functional improvement that maintains backward compatibility with designs expecting 120 ns performance. System timing margins are maintained or improved.

Q: What packaging format is used for the SST39VF020-70-4C-NHE?

A: The SST39VF020-70-4C-NHE is supplied in tube packaging, while the AT49F002-12JC was supplied in standard packaging. Both use identical 32-PLCC (J-Lead) case format.