AT49BV002AT-70PI Equivalent & Substitute Parts

Part Overview

The AT49BV002AT-70PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PDIP package with 70 ns access time. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. 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

AT49BV002AT-70PI

Microchip TechnologyIn Stock: 782AT49BV002AT-70PI Datasheet

Current PartRFQ

SST39SF020A-70-4C-PHE

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT49BV002AT-70PI is based on the following critical parameters:

• Memory Capacity & Organization: 2Mbit capacity with 256K x 8 organization must be maintained
• Memory Interface Type: Parallel interface is required for pin-level compatibility
• Package Compatibility: 32-DIP (0.600", 15.24mm) package ensures mechanical and electrical socket compatibility
• Access Time: 70 ns access time establishes the performance baseline
• Mounting Type: Through-hole mounting must be preserved for PCB integration

The SST39SF020A-70-4C-PHE meets these core substitution criteria, providing equivalent memory capacity, organization, interface type, package form factor, and access time performance.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE serves as the primary substitute for the AT49BV002AT-70PI based on functional equivalence in memory capacity, organization, interface type, package form factor, and access time performance.

Product Status Consideration: The AT49BV002AT-70PI is obsolete, while the SST39SF020A-70-4C-PHE is active. Active product status ensures ongoing availability and manufacturing support.

Compliance Status: The SST39SF020A-70-4C-PHE is ROHS3 compliant, whereas the AT49BV002AT-70PI is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements.

Operational Parameter Differences: The substitute part operates at 4.5V to 5.5V supply voltage, compared to the original part's 2.7V to 3.6V range. The substitute also specifies an operating temperature range of 0°C to 70°C versus the original's -40°C to 85°C. Write cycle time is improved in the substitute at 20µs versus 50µs in the original. These differences must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE be used as a direct replacement for the AT49BV002AT-70PI?

A: Both parts share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, 32-DIP package form factor, and 70 ns access time. However, the supply voltage ranges differ (4.5V–5.5V versus 2.7V–3.6V) and operating temperature ranges differ (-40°C to 85°C versus 0°C to 70°C). Substitution is valid only when the application's power supply and temperature specifications align with the substitute part's operating parameters.

Q: Why are the supply voltage ranges different between these parts?

A: The AT49BV002AT-70PI operates at lower voltage (2.7V–3.6V), while the SST39SF020A-70-4C-PHE requires higher voltage (4.5V–5.5V). This difference reflects different design generations and technology nodes. Circuit design must accommodate the substitute part's voltage requirements.

Q: What is the significance of the write cycle time difference?

A: The AT49BV002AT-70PI has a 50µs write cycle time, while the SST39SF020A-70-4C-PHE has a 20µs write cycle time. The substitute part offers faster write performance. This difference does not prevent substitution but may affect firmware timing routines if they were optimized for the original part's slower write cycle.

Q: Are both parts available in the same package?

A: Yes. Both the AT49BV002AT-70PI and SST39SF020A-70-4C-PHE are housed in 32-DIP (0.600", 15.24mm) through-hole packages, ensuring mechanical and pin-level compatibility on PCBs designed for the original part.

Q: What does the obsolete status of the AT49BV002AT-70PI mean for procurement?

A: Obsolete status indicates the AT49BV002AT-70PI is no longer manufactured. The SST39SF020A-70-4C-PHE, with active product status, is the recommended path for new designs and ongoing production requirements where functional equivalence is established.