AT93C46C-10PI EEPROM Equivalent & Substitute Parts

Part Overview

The AT93C46C-10PI is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring 3-Wire Serial interface operation at 2 MHz clock frequency. This component is designed for non-volatile data storage applications requiring serial communication protocols. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations. Substitute parts must maintain functional equivalence across memory capacity, interface protocol, electrical specifications, and physical packaging to ensure direct replacement capability.

Substiute Parts

AT93C46C-10PI

Microchip TechnologyIn Stock: 1230AT93C46C-10PI Datasheet

Current PartRFQ

93C46B/P

Microchip TechnologyIn Stock: 391393C46B/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute compatibility for the AT93C46C-10PI is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must provide 1Kbit capacity with 64 x 16 organization to maintain data storage equivalence.

Serial Interface Protocol: The original part operates on 3-Wire Serial protocol. Substitute parts utilizing Microwire interface are compatible, as Microwire represents an industry-standard evolution of 3-Wire Serial communication with backward compatibility for this memory class.

Clock Frequency: 2 MHz operation is required to maintain timing compatibility with existing system designs.

Electrical Specifications: Supply voltage range of 4.5V ~ 5.5V and non-volatile EEPROM technology must be preserved.

Physical Package: 8-DIP through-hole package with 0.300" (7.62mm) spacing is mandatory for PCB compatibility.

Operating Temperature Range: Substitute parts must support the required temperature envelope for the application environment.

The 93C46B/P meets all substitution criteria while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 93C46B/P is the qualified substitute for AT93C46C-10PI applications. Selection rationale is based on the following factors:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance Certifications: The 93C46B/P achieves ROHS3 compliance, meeting current environmental and regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Functional Equivalence: Identical memory capacity, organization, clock frequency, and supply voltage specifications ensure direct functional replacement within existing circuit designs.

Interface Compatibility: Microwire protocol compatibility with 3-Wire Serial applications is established for this memory device class, enabling seamless integration.

Performance Improvement: The substitute part provides reduced write cycle time (2ms versus 10ms), offering performance enhancement without compromising compatibility.

Temperature Consideration: The substitute part operates within 0°C ~ 70°C range, which is narrower than the original -40°C ~ 85°C specification. Applications requiring extended temperature operation below 0°C or above 70°C must retain the original part or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the 93C46B/P directly replace the AT93C46C-10PI in existing designs?

A: Yes, for applications operating within 0°C ~ 70°C temperature range. The substitute part provides identical memory capacity, organization, clock frequency, supply voltage, and physical package. Microwire interface is compatible with 3-Wire Serial protocol for this memory class.

Q: What is the primary difference between the original and substitute part?

A: The main differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), write cycle time (10ms versus 2ms), and operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C).

Q: Are there temperature limitations when using the substitute part?

A: Yes. The 93C46B/P operates within 0°C ~ 70°C. Applications requiring operation below 0°C or above 70°C must evaluate alternative solutions, as the substitute part does not support the full temperature range of the original component.

Q: Is the 8-DIP package identical between both parts?

A: Yes. Both parts use 8-DIP (0.300", 7.62mm) through-hole packaging, enabling direct PCB compatibility without layout modifications.

Q: What is the significance of Microwire versus 3-Wire Serial interface?

A: Microwire is an industry-standard serial protocol that maintains compatibility with 3-Wire Serial applications for EEPROM memory devices. The interface change does not affect functional compatibility for this memory class.

Q: Does the improved write cycle time affect system compatibility?

A: No. The faster write cycle time (2ms versus 10ms) in the substitute part is a performance improvement that does not create compatibility issues. Systems designed for 10ms write cycles operate correctly with 2ms write cycles.

Q: What compliance certifications apply to both parts?

A: Both parts maintain REACH Unaffected status and EAR99 export classification. The substitute part additionally achieves ROHS3 compliance, while the original part is RoHS non-compliant.