AT49BV002NT-12JC Equivalent & Substitute Parts

Part Overview

The AT49BV002NT-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 2.7V to 3.6V supply voltage range and supports 256K x 8 memory organization with parallel interface architecture.

Substiute Parts

AT49BV002NT-12JC

Microchip TechnologyIn Stock: 864AT49BV002NT-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 AT49BV002NT-12JC is determined by strict equivalence across the following critical parameters:

• Memory capacity: 2Mbit (non-negotiable)
• Memory organization: 256K x 8 (non-negotiable)
• Memory interface: Parallel (non-negotiable)
• Package type: 32-PLCC with J-Lead configuration (non-negotiable)
• Supply voltage range: 2.7V ~ 3.6V (must be compatible)
• Operating temperature range: 0°C ~ 70°C (must be compatible)
• Mounting type: Surface Mount (non-negotiable)

The SST39VF020-70-4C-NHE meets all substitution criteria. While it offers improved performance characteristics (70 ns access time versus 120 ns, 20µs write cycle versus 50µs), these enhancements do not disqualify it as a direct substitute. The part maintains identical memory capacity, organization, interface type, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The SST39VF020-70-4C-NHE is a direct functional equivalent to the AT49BV002NT-12JC. Selection of the substitute part is supported by the following factors:

• The substitute part is in active production status, ensuring long-term availability and supply chain stability.
• The SST39VF020-70-4C-NHE achieves ROHS3 compliance, whereas the original part is non-compliant. This addresses regulatory requirements for new designs and manufacturing environments subject to RoHS directives.
• Identical electrical and mechanical specifications ensure pin-for-pin compatibility and functional interchangeability within existing circuit designs.
• Superior performance characteristics (faster access time and write cycle time) provide operational margin without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can the SST39VF020-70-4C-NHE be used as a direct replacement in existing AT49BV002NT-12JC designs?

A: Yes. Both parts share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, supply voltage range (2.7V ~ 3.6V), operating temperature range (0°C ~ 70°C), and 32-PLCC package configuration. The substitute part is pin-for-pin compatible.

Q: What are the performance differences between these parts?

A: The SST39VF020-70-4C-NHE provides faster access time (70 ns versus 120 ns) and faster write cycle time (20µs versus 50µs). These improvements do not create compatibility issues and represent performance enhancement.

Q: Why is the original part classified as obsolete?

A: The AT49BV002NT-12JC is listed as obsolete by the manufacturer. The SST39VF020-70-4C-NHE, also from Microchip Technology, is the active production equivalent within the SST39 MPF series.

Q: Are there packaging differences between these parts?

A: Both parts use 32-PLCC (J-Lead) surface mount packages. Physical dimensions are equivalent: AT49BV002NT-12JC measures 13.97x11.43mm, while SST39VF020-70-4C-NHE measures 11.43x13.97mm (rotated orientation, functionally identical).

Q: What is the RoHS compliance status difference?

A: The AT49BV002NT-12JC is RoHS non-compliant. The SST39VF020-70-4C-NHE is ROHS3 compliant, meeting current environmental and regulatory standards for electronics manufacturing.