AT49BV002A-70PI Equivalent & Substitute Parts

Part Overview

The AT49BV002A-70PI 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, making identification of compatible substitute parts essential for ongoing system support and component procurement. The part operates within a 2.7V to 3.6V supply voltage range and supports industrial temperature applications from -40°C to 85°C.

Substiute Parts

AT49BV002A-70PI

Microchip TechnologyIn Stock: 788AT49BV002A-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 of the AT49BV002A-70PI is determined by the following critical parameters:

• Memory capacity (2Mbit) and organization (256K x 8) must remain identical
• Parallel interface architecture is mandatory for pin-level compatibility
• 32-PDIP package and through-hole mounting type ensure physical and electrical socket compatibility
• Access time of 70 ns or faster maintains timing specifications
• Pin configuration and functional equivalence within the 32-DIP footprint

The SST39SF020A-70-4C-PHE meets these core substitution criteria. However, the supply voltage range differs: the substitute operates at 4.5V to 5.5V versus the original 2.7V to 3.6V specification. This voltage differential represents a critical design consideration for system integration.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the designated manufacturer-recommended substitute for the AT49BV002A-70PI. Both devices share identical memory capacity, organization, interface type, access time, and physical package specifications.

The substitute part offers advantages in product lifecycle status (active versus obsolete) and regulatory compliance (ROHS3 compliant versus non-compliant). The SST39SF020A-70-4C-PHE also provides improved write cycle performance at 20µs compared to the original 50µs specification.

Critical design considerations include voltage supply range compatibility. The substitute operates at 4.5V to 5.5V, requiring system-level voltage regulation if the original 2.7V to 3.6V supply is maintained. Operating temperature ranges differ: the substitute supports 0°C to 70°C versus the original -40°C to 85°C, which may impact applications requiring extended industrial temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE directly replace the AT49BV002A-70PI in existing designs?

A: Physical and functional pin compatibility exists due to identical 32-PDIP packaging and parallel interface architecture. However, supply voltage requirements differ. The substitute requires 4.5V to 5.5V operation versus the original 2.7V to 3.6V specification. System power supply design must accommodate this voltage differential.

Q: What are the key differences between these parts?

A: Memory capacity, organization, interface type, access time, and package are identical. Differences include supply voltage range, operating temperature range, write cycle time, product status, and RoHS compliance. The substitute offers faster write performance and active product status.

Q: Is the operating temperature range difference significant?

A: The AT49BV002A-70PI supports -40°C to 85°C operation, while the SST39SF020A-70-4C-PHE supports 0°C to 70°C. Applications requiring sub-zero or extended high-temperature operation must evaluate this specification gap against system requirements.

Q: Does the improved write cycle time affect system design?

A: The SST39SF020A-70-4C-PHE provides 20µs write cycle time versus the original 50µs. This improvement is backward-compatible; systems designed for 50µs operation will function correctly with the faster substitute without modification.

Q: What is the significance of RoHS compliance status?

A: The AT49BV002A-70PI is RoHS non-compliant, while the SST39SF020A-70-4C-PHE is ROHS3 compliant. For new designs or systems subject to RoHS regulatory requirements, the substitute part satisfies compliance obligations.