CAT28F010L90 Equivalent & Substitute Parts

Part Overview

The CAT28F010L90 is a 1Mbit parallel FLASH memory IC manufactured by onsemi, housed in a 32-DIP package with 90 ns access time. This device is classified as obsolete, making equivalent substitute parts necessary for new designs, legacy system repairs, and production continuity. The part operates within the 4.5V to 5.5V supply range and supports 128K x 8 memory organization with parallel interface architecture.

Substiute Parts

CAT28F010L90

onsemiIn Stock: 785CAT28F010L90 Datasheet

Current PartRFQ

SST39SF010A-70-4C-PHE

Microchip TechnologyIn Stock: 3608SST39SF010A-70-4C-PHE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT28F010L90 is determined by strict equivalence across the following parameters:

• Memory capacity: 1Mbit total storage
• Memory organization: 128K x 8 bit configuration
• Interface type: Parallel access architecture
• Package form factor: 32-DIP with 0.600" (15.24mm) body width
• Mounting technology: Through-hole pin configuration
• Supply voltage compatibility: 4.5V to 5.5V operating range
• Operating temperature range: 0°C to 70°C

The SST39SF010A-70-4C-PHE meets all substitution criteria. While it features a faster 70 ns access time compared to the original 90 ns specification, this represents an improvement in performance and maintains full backward compatibility. Both devices share identical memory capacity, organization, parallel interface, package geometry, and voltage/temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF010A-70-4C-PHE is a direct functional substitute for the CAT28F010L90. Selection is supported by the following factors:

• The substitute maintains active product status with Microchip Technology, ensuring ongoing availability and supply chain reliability compared to the obsolete CAT28F010L90.
• Both devices are REACH Unaffected and classified under identical HTSUS code 8542.32.0071, confirming regulatory equivalence.
• The SST39SF010A-70-4C-PHE is RoHS3 Compliant, meeting modern environmental standards.
• Faster access time (70 ns vs. 90 ns) provides performance improvement without requiring circuit redesign.
• Identical pinout, package geometry, and electrical specifications enable direct socket replacement in existing PCB designs.
• The substitute is verified as programmable through DiGi-Electronics, confirming functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF010A-70-4C-PHE replace the CAT28F010L90 in existing designs?

A: Yes. Both devices share identical memory capacity (1Mbit), organization (128K x 8), parallel interface, 32-DIP package geometry, supply voltage range (4.5V–5.5V), and operating temperature range (0°C–70°C). The substitute's faster access time (70 ns) is a performance improvement and maintains full backward compatibility.

Q: What is the primary reason for substitution?

A: The CAT28F010L90 is classified as obsolete. The SST39SF010A-70-4C-PHE is an active product from Microchip Technology, ensuring long-term availability and supply continuity.

Q: Are there differences in packaging or mounting?

A: No. Both devices use 32-DIP through-hole packages with identical 0.600" (15.24mm) body width and pin configuration, enabling direct PCB socket replacement.

Q: What compliance certifications apply to the substitute?

A: The SST39SF010A-70-4C-PHE is RoHS3 Compliant and REACH Unaffected. Both devices share the same ECCN (EAR99) and HTSUS classification (8542.32.0071).

Q: Is the faster access time of the substitute a concern?

A: No. A 70 ns access time is faster than the original 90 ns specification, representing an improvement. Systems designed for 90 ns operation will function correctly with the faster substitute.