AT49BV002T-12JC Equivalent & Substitute Parts

Part Overview

The AT49BV002T-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 components necessary for new designs and ongoing production support. The part operates within a 2.7V to 3.6V supply range and supports 256K x 8 memory organization with parallel interface architecture.

Substiute Parts

AT49BV002T-12JC

Microchip TechnologyIn Stock: 837AT49BV002T-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 AT49BV002T-12JC is determined by strict equivalence across the following 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 functional equivalent. The substitute maintains identical memory capacity, organization, interface type, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The SST39VF020-70-4C-NHE is the qualified substitute for AT49BV002T-12JC applications. Selection rationale is based on the following factors:

• The substitute maintains full electrical and mechanical compatibility across all critical parameters
• The substitute is in active production status, ensuring long-term availability and supply chain stability
• The substitute achieves ROHS3 compliance, whereas the original part is non-compliant
• Performance improvements (faster access time and write cycle) provide design margin without requiring circuit modifications
• Both devices share identical supply voltage requirements and operating temperature specifications
• Package footprint and pinout are equivalent, enabling direct board-level substitution

Frequently Asked Questions (FAQ)

Q: Can SST39VF020-70-4C-NHE be used as a direct replacement for AT49BV002T-12JC?

A: Yes. Both devices are 2Mbit parallel FLASH memory ICs with 256K x 8 organization in 32-PLCC packages. Electrical specifications, supply voltage range, and operating temperature are identical. The substitute can be soldered into existing PCB footprints without modification.

Q: What are the performance differences between these parts?

A: The SST39VF020-70-4C-NHE offers faster access time (70 ns versus 120 ns) and faster write cycle time (20µs versus 50µs). These improvements are backward-compatible with designs specified for the AT49BV002T-12JC.

Q: Why is the original part obsolete?

A: The AT49BV002T-12JC is classified as obsolete by the manufacturer. The SST39VF020-70-4C-NHE is the active production equivalent within the Microchip Technology product portfolio.

Q: Are there compliance differences?

A: Yes. The AT49BV002T-12JC is RoHS non-compliant. The SST39VF020-70-4C-NHE is ROHS3 compliant, meeting current environmental and regulatory standards.

Q: Is the package configuration identical?

A: Yes. Both parts use 32-PLCC (J-Lead) surface mount packages with identical physical dimensions and pinout. No PCB redesign is required.

Q: What is the moisture sensitivity level difference?

A: The AT49BV002T-12JC has MSL 2 (1 Year). The SST39VF020-70-4C-NHE has MSL 3 (168 Hours). Both are within standard handling and storage protocols for surface mount components.