CAT28F020GI12 Equivalent & Substitute Parts

Part Overview

The CAT28F020GI12 is a 2Mbit parallel FLASH memory IC manufactured by onsemi, housed in a 32-PLCC package with 120 ns access time. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across the industrial temperature range of -40°C to 85°C with a supply voltage of 4.5V to 5.5V.

Substiute Parts

CAT28F020GI12

onsemiIn Stock: 1092CAT28F020GI12 Datasheet

Current PartRFQ

SST39SF020A-55-4I-NHE

Microchip TechnologyIn Stock: 2260SST39SF020A-55-4I-NHE Datasheet

SimilarRFQ

SST39SF020A-70-4I-NHE

Microchip TechnologyIn Stock: 2197SST39SF020A-70-4I-NHE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CAT28F020GI12 is based on the following critical parameters that must remain constant:

• Memory capacity: 2Mbit
• Memory organization: 256K x 8
• Memory interface: Parallel
• Package type: 32-PLCC (11.43x13.97)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Surface Mount

The identified substitute parts are Microchip Technology SST39SF020A series devices, which maintain identical memory specifications, package dimensions, and electrical operating parameters. Access time variations (55 ns and 70 ns) represent performance improvements over the original 120 ns specification and do not compromise backward compatibility in parallel FLASH memory applications.

Parameter Comparison

Engineering Selection Recommendations

Both SST39SF020A variants are active products manufactured by Microchip Technology and represent direct functional equivalents to the obsolete CAT28F020GI12. The SST39SF020A-55-4I-NHE offers superior access time performance (55 ns) and improved moisture sensitivity rating (MSL 2), while the SST39SF020A-70-4I-NHE maintains MSL 3 compatibility with the original part. Both substitute parts are ROHS3 compliant and carry identical REACH unaffected status. Selection between the two variants depends on system timing requirements and moisture exposure conditions during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can SST39SF020A parts directly replace CAT28F020GI12 in existing designs?

A: Yes. Both SST39SF020A variants maintain identical memory capacity (2Mbit), organization (256K x 8), parallel interface, 32-PLCC package dimensions, and supply voltage specifications. Pin-to-pin compatibility is confirmed for direct PCB substitution.

Q: What is the difference between the two SST39SF020A variants?

A: The primary differences are access time (55 ns versus 70 ns) and moisture sensitivity level (MSL 2 versus MSL 3). The 55 ns variant provides faster read performance and superior moisture protection during storage. Both maintain identical write cycle time and operating temperature range.

Q: Are there any compliance differences between the original and substitute parts?

A: The substitute parts are ROHS3 compliant, whereas the original part's RoHS status is not specified. Both substitute parts and the original part carry REACH unaffected status and EAR99 ECCN classification.

Q: Does faster access time in substitute parts affect system compatibility?

A: No. Faster access time (55 ns or 70 ns) compared to the original 120 ns specification improves system performance without introducing compatibility issues. Systems designed for 120 ns operation function correctly with faster components.

Q: What packaging format is used for these parts?

A: All parts use 32-PLCC (Plastic Leaded Chip Carrier) surface mount packaging with dimensions of 11.43 x 13.97 mm. The package type is 32-LCC (J-Lead) configuration.