CAT93C46RLI-G EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The CAT93C46RLI-G is a 1Kbit EEPROM memory IC manufactured by onsemi, featuring Microwire serial interface protocol and 4 MHz clock frequency. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. The part operates across a wide supply voltage range of 1.8V to 5.5V and supports industrial temperature specifications from -40°C to 85°C in an 8-PDIP through-hole package.

Substiute Parts

CAT93C46RLI-G

onsemiIn Stock: 1528CAT93C46RLI-G Datasheet

Current PartRFQ

93AA46C-I/P

Microchip TechnologyIn Stock: 86293AA46C-I/P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CAT93C46RLI-G is determined by strict alignment across the following critical parameters:

• Memory Capacity & Organization: Substitute parts must provide 1Kbit capacity with 128 x 8 or 64 x 16 organization to ensure data structure compatibility
• Serial Interface Protocol: Microwire interface is mandatory for protocol-level compatibility with existing circuit designs
• Voltage Supply Range: Substitute parts must support the full 1.8V to 5.5V operating range to maintain compatibility across system power domains
• Operating Temperature Range: -40°C to 85°C specification must be met to ensure reliability in target environments
• Package & Pinout: 8-DIP through-hole package with identical pinout is required for direct board-level substitution without redesign

The 93AA46C-I/P from Microchip Technology meets all substitution criteria. While clock frequency differs (3 MHz versus 4 MHz), this parameter does not prevent functional substitution, as the lower frequency remains compatible with Microwire protocol timing requirements and does not degrade system performance in typical applications.

Parameter Comparison

Engineering Selection Recommendations

The 93AA46C-I/P is a direct functional equivalent for the obsolete CAT93C46RLI-G. Selection should be based on the following engineering factors:

Product Status: The 93AA46C-I/P maintains active product status with ongoing manufacturer support, ensuring long-term availability and supply chain stability compared to the obsolete CAT93C46RLI-G.

Regulatory Compliance: The 93AA46C-I/P carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and procurement cycles.

Electrical Compatibility: Both parts operate identically across voltage supply range (1.8V to 5.5V) and temperature specifications (-40°C to 85°C), ensuring drop-in compatibility in existing circuit implementations.

Clock Frequency Consideration: The 3 MHz clock frequency of the 93AA46C-I/P is lower than the 4 MHz specification of the CAT93C46RLI-G. This difference does not prevent substitution, as Microwire protocol timing remains compatible and system performance is not degraded in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the 93AA46C-I/P directly replace the CAT93C46RLI-G without circuit modification?

A: Yes. Both parts share identical pinout, package type (8-DIP), voltage supply range (1.8V to 5.5V), operating temperature range (-40°C to 85°C), memory capacity (1Kbit), and Microwire serial interface protocol. Direct board-level substitution is possible without redesign.

Q: Does the lower clock frequency (3 MHz vs. 4 MHz) affect system performance?

A: No. The 3 MHz clock frequency of the 93AA46C-I/P remains fully compatible with Microwire protocol timing requirements. System performance is not degraded in typical applications, as the lower frequency does not introduce timing violations or protocol incompatibilities.

Q: What is the significance of the CAT93C46RLI-G being classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by onsemi. Substitution with an active product like the 93AA46C-I/P ensures continued availability, supply chain reliability, and access to manufacturer technical support.

Q: Are there any compliance differences between these parts?

A: The 93AA46C-I/P carries ROHS3 compliance certification, meeting current environmental regulations. The CAT93C46RLI-G compliance status is not specified in available documentation. For new designs or procurement requiring regulatory compliance, the 93AA46C-I/P is the appropriate selection.

Q: Can the 93AA46C-I/P be used in applications requiring the full 4 MHz clock frequency?

A: The 93AA46C-I/P operates at 3 MHz. If the application circuit requires operation specifically at 4 MHz, timing analysis must be performed to determine whether the lower frequency introduces functional limitations. In most standard Microwire applications, 3 MHz operation is sufficient.