AT49F002-70PI Equivalent & Substitute Parts

Part Overview

The AT49F002-70PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-DIP package with 70 ns access time. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates within the 4.5V to 5.5V supply range and supports 256K x 8 memory organization with parallel interface architecture.

Substiute Parts

AT49F002-70PI

Microchip TechnologyIn Stock: 1093AT49F002-70PI 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 AT49F002-70PI is determined by strict equivalence across the following parameters:

• Memory capacity: 2Mbit (256K x 8 organization)
• Interface type: Parallel
• Access time: 70 ns maximum
• Supply voltage: 4.5V ~ 5.5V compatibility
• Package: 32-DIP form factor with identical pinout
• Memory technology: FLASH non-volatile

The SST39SF020A-70-4C-PHE meets all electrical and mechanical substitution criteria for the AT49F002-70PI. Both devices share identical memory capacity, organization, interface architecture, access time specification, supply voltage range, and physical package dimensions.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the direct functional equivalent for AT49F002-70PI replacement. Selection of this substitute is supported by:

• Identical electrical specifications across memory capacity, organization, interface type, access time, and supply voltage
• Matching physical package dimensions and through-hole mounting compatibility
• Active product status ensuring continued availability and supply chain reliability
• ROHS3 compliance status, providing regulatory advantage over the non-compliant original part
• Improved write cycle time (20µs versus 50µs) offering performance enhancement in write-intensive applications

Frequently Asked Questions (FAQ)

Q: Can SST39SF020A-70-4C-PHE directly replace AT49F002-70PI in existing designs?

A: Yes. Both devices share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, 70 ns access time, 4.5V–5.5V supply voltage, and 32-DIP package pinout. Direct socket substitution is supported.

Q: What is the difference in write cycle time between these parts?

A: The SST39SF020A-70-4C-PHE has a 20µs write cycle time compared to 50µs for the AT49F002-70PI. This represents improved write performance and does not affect compatibility.

Q: Are there operating temperature differences?

A: Yes. The AT49F002-70PI operates from -40°C to 85°C (TC), while the SST39SF020A-70-4C-PHE operates from 0°C to 70°C (TA). Verify that the substitute's temperature range meets your application requirements.

Q: What is the significance of RoHS compliance status?

A: The SST39SF020A-70-4C-PHE is ROHS3 compliant, while the AT49F002-70PI is non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute provides regulatory alignment.

Q: Are packaging options different?

A: The AT49F002-70PI is supplied in standard packaging, while the SST39SF020A-70-4C-PHE is supplied in Tube packaging. Both maintain identical 32-DIP physical dimensions and pinout.