CAT93C86LI-G EEPROM 16Kbit Microwire Equivalent & Substitute Parts

Part Overview

The CAT93C86LI-G is a 16Kbit non-volatile EEPROM memory IC manufactured by onsemi, featuring Microwire serial interface protocol with 3 MHz clock frequency. This component is packaged in 8-DIP through-hole configuration and operates across a wide supply voltage range of 1.8V to 5.5V with temperature range of -40°C to 85°C.

The CAT93C86LI-G is classified as obsolete. Equivalent and substitute parts are available from active product lines, primarily from Microchip Technology, offering identical or enhanced electrical and mechanical compatibility for direct replacement applications.

Substiute Parts

CAT93C86LI-G

onsemiIn Stock: 890CAT93C86LI-G Datasheet

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CAT93C86VI-GT3

onsemiIn Stock: 17120CAT93C86VI-GT3 Datasheet

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93AA86C-I/P

Microchip TechnologyIn Stock: 116593AA86C-I/P Datasheet

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93C86C-I/P

Microchip TechnologyIn Stock: 90493C86C-I/P Datasheet

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93LC86-I/P

Microchip TechnologyIn Stock: 109393LC86-I/P Datasheet

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93LC86C-E/P

Microchip TechnologyIn Stock: 112693LC86C-E/P Datasheet

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93LC86C-I/P

Microchip TechnologyIn Stock: 648093LC86C-I/P Datasheet

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AT93C86A-10PU-1.8

Microchip TechnologyIn Stock: 1572AT93C86A-10PU-1.8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CAT93C86LI-G are classified based on the following substitution criteria:

Primary Substitution Parameters:

• Memory Size: 16Kbit (mandatory match)
• Memory Organization: 2K x 8 or 1K x 16 (mandatory match)
• Memory Interface: Microwire protocol (mandatory match)
• Clock Frequency: 3 MHz (mandatory match)
• Package Type: 8-DIP through-hole (mandatory match for direct PCB replacement)
• Voltage Supply Range: Must encompass or match 1.8V ~ 5.5V
• Operating Temperature: Must support -40°C ~ 85°C minimum

Substitute Categories:

1. Direct Pin-Compatible Substitutes (Through-Hole 8-DIP): Parts maintaining identical package, pinout, and electrical interface. These include 93AA86C-I/P, 93C86C-I/P, 93LC86-I/P, 93LC86C-E/P, and 93LC86C-I/P from Microchip Technology.

2. Package Variant (Surface Mount Alternative): CAT93C86VI-GT3 maintains identical electrical specifications but uses 8-SOIC surface-mount packaging, suitable for applications requiring SMD assembly.

3. Interface Variant: AT93C86A-10PU-1.8 uses 3-Wire Serial interface instead of Microwire, with reduced clock frequency (2 MHz) and extended write cycle time (10ms). This part is electrically compatible but requires interface protocol adaptation.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Recommended Primary Options):

The 93LC86C-I/P from Microchip Technology is the preferred substitute for the obsolete CAT93C86LI-G. This part maintains identical memory capacity, Microwire interface, 3 MHz clock frequency, and 8-DIP through-hole packaging. The 93LC86C-I/P operates across 2.5V to 5.5V supply range, encompassing the original 1.8V to 5.5V specification, and maintains the -40°C to 85°C temperature range. This part is active in production with RoHS3 compliance and unlimited moisture sensitivity level rating.

The 93AA86C-I/P provides equivalent functionality with identical electrical specifications and active product status. Both parts are suitable for direct PCB replacement without design modification.

For Extended Temperature Applications:

The 93LC86C-E/P extends the operating temperature range to -40°C to 125°C while maintaining all other electrical parameters. This variant is appropriate for applications requiring enhanced thermal performance.

For Surface-Mount Assembly:

The CAT93C86VI-GT3 from onsemi provides identical electrical specifications in 8-SOIC surface-mount packaging. This part maintains active product status and RoHS3 compliance, suitable for SMD-based PCB designs.

For Low-Voltage Applications:

The 93LC86-I/P supports extended supply voltage range of 2.5V to 6.0V, providing additional margin for low-voltage system designs while maintaining all other core specifications.

Interface Variant Consideration:

The AT93C86A-10PU-1.8 uses 3-Wire Serial interface protocol instead of Microwire. This part is not a direct functional substitute and requires firmware or protocol adaptation. Selection of this part is appropriate only when system design permits interface protocol modification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace CAT93C86LI-G with 93LC86C-I/P without PCB modification?

A: Yes. The 93LC86C-I/P maintains identical pinout, package type (8-DIP), memory capacity (16Kbit), interface protocol (Microwire), and clock frequency (3 MHz). No PCB layout changes are required for direct substitution.

Q: What is the difference between 93AA86C-I/P, 93C86C-I/P, and 93LC86C-I/P?

A: All three parts share identical memory capacity, interface, and package. The primary differences are voltage supply ranges: 93AA86C-I/P operates 1.8V to 5.5V, 93C86C-I/P operates 4.5V to 5.5V (narrower range), and 93LC86C-I/P operates 2.5V to 5.5V. Selection depends on system supply voltage requirements.

Q: Why is CAT93C86VI-GT3 listed as a substitute if it uses different packaging?

A: CAT93C86VI-GT3 is electrically equivalent but uses 8-SOIC surface-mount packaging instead of 8-DIP through-hole. This part is suitable only for applications using SMD assembly processes. It is not a direct PCB replacement for through-hole designs.

Q: Can AT93C86A-10PU-1.8 replace CAT93C86LI-G directly?

A: No. While AT93C86A-10PU-1.8 maintains identical memory capacity and package type, it uses 3-Wire Serial interface protocol instead of Microwire. Direct substitution requires firmware modification to support the different serial protocol. The reduced clock frequency (2 MHz versus 3 MHz) and extended write cycle time (10ms versus unspecified) also represent functional differences.

Q: What is the significance of RoHS3 compliance on substitute parts?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. All active substitute parts listed carry RoHS3 compliance certification, ensuring regulatory alignment with modern manufacturing and environmental standards.

Q: Does the CAT93C86LI-G obsolete status affect substitute part availability?

A: Yes. The CAT93C86LI-G is classified as obsolete, meaning onsemi no longer manufactures this part. Substitute parts from Microchip Technology (93LC86C-I/P, 93AA86C-I/P, 93C86C-I/P, 93LC86-I/P, 93LC86C-E/P) are all active products with confirmed inventory availability, ensuring long-term supply continuity.

Q: Are all substitute parts REACH compliant?

A: Yes. All substitute parts listed carry REACH Unaffected status, indicating compliance with Registration, Evaluation, Authorization and Restriction of Chemicals regulations.