AT49F002T-90PI Equivalent & Substitute Parts

Part Overview

The AT49F002T-90PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PDIP package. This device features a 90 ns access time and operates across the industrial temperature range of -40°C to 85°C. The part is classified as obsolete, making equivalent substitute components necessary for ongoing system support and new design implementations. The AT49F002T-90PI serves applications requiring non-volatile parallel memory with through-hole mounting in legacy and industrial systems.

Substiute Parts

AT49F002T-90PI

Microchip TechnologyIn Stock: 729AT49F002T-90PI 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 AT49F002T-90PI is determined by the following critical parameters:

• Memory Capacity & Organization: Substitute parts must provide 2Mbit capacity in 256K x 8 organization to maintain functional equivalence
• Memory Interface: Parallel interface is mandatory for pin-compatible replacement
• Package & Pinout: 32-DIP package with identical physical dimensions (0.600", 15.24mm) ensures mechanical compatibility
• Voltage Supply Range: 4.5V ~ 5.5V compatibility ensures electrical interchangeability
• Access Time: Substitute parts with equal or faster access times (≤90 ns) maintain or improve system performance
• Write Cycle Time: Substitute parts with equal or faster write times maintain or improve programming speed
• Mounting Type: Through-hole mounting must be preserved for PCB compatibility

The SST39SF020A-70-4C-PHE meets all substitution criteria, providing improved performance characteristics while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is a direct functional substitute for the AT49F002T-90PI. Selection is based on the following engineering factors:

• Product Status: The AT49F002T-90PI is obsolete; the SST39SF020A-70-4C-PHE is active and available in production quantities (1764 pcs in stock)
• Electrical Compatibility: Both devices operate on identical 4.5V ~ 5.5V supply voltage and share the same parallel memory interface
• Performance Enhancement: The substitute provides faster access time (70 ns vs. 90 ns) and faster write cycle time (20µs vs. 50µs), improving system performance without design modification
• Mechanical Compatibility: Identical 32-DIP package ensures direct PCB socket replacement without layout changes
• Regulatory Compliance: The SST39SF020A-70-4C-PHE achieves ROHS3 compliance, addressing modern environmental and regulatory requirements
• Availability: Active product status with substantial inventory ensures long-term supply chain reliability

Frequently Asked Questions (FAQ)

Q: Can the SST39SF020A-70-4C-PHE replace the AT49F002T-90PI in existing designs?

A: Yes. Both devices share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, supply voltage (4.5V ~ 5.5V), and 32-DIP package dimensions. The substitute is a direct pin-compatible replacement requiring no circuit modifications.

Q: What are the performance differences between these parts?

A: The SST39SF020A-70-4C-PHE provides improved performance with 70 ns access time (versus 90 ns) and 20µs write cycle time (versus 50µs). These improvements enhance system speed without introducing compatibility issues.

Q: Are there temperature range differences?

A: Yes. The AT49F002T-90PI operates from -40°C to 85°C (industrial range), while the SST39SF020A-70-4C-PHE operates from 0°C to 70°C (commercial range). For applications requiring the full -40°C to 85°C range, verify that the substitute's operating temperature meets system requirements.

Q: What is the packaging difference?

A: Both parts use 32-DIP (0.600", 15.24mm) through-hole packages. The SST39SF020A-70-4C-PHE is supplied in tube packaging, while the AT49F002T-90PI packaging format is not specified. This does not affect electrical or mechanical compatibility.

Q: Does the substitute meet modern compliance standards?

A: The SST39SF020A-70-4C-PHE is ROHS3 compliant, addressing current environmental regulations. The AT49F002T-90PI is RoHS non-compliant. Both are REACH unaffected and classified as EAR99 for export purposes.

Q: Is the SST39SF020A-70-4C-PHE available for production use?

A: Yes. The SST39SF020A-70-4C-PHE is active product status with 1764 pcs in stock, ensuring availability for both prototype and production quantities.