Equivalent & Substitute Parts for 93AA66-I/P

Part Overview

The 93AA66-I/P is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, utilizing Microwire serial interface protocol. This non-volatile memory device operates across a wide supply voltage range of 1.8V to 5.5V and supports industrial temperature specifications from -40°C to 85°C. The component is housed in an 8-PDIP through-hole package and maintains Active product status with ROHS3 compliance. Alternative equivalent parts may be required due to inventory availability, performance optimization needs, or specific application timing requirements.

Substiute Parts

93AA66-I/P

Microchip TechnologyIn Stock: 69693AA66-I/P Datasheet

Current PartRFQ

93AA66C-I/P

Microchip TechnologyIn Stock: 182693AA66C-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93AA66-I/P is determined by strict equivalence across the following critical parameters:

• Memory capacity (4Kbit) and organization (512 x 8, 256 x 16)
• Serial interface protocol (Microwire)
• Physical package format (8-PDIP through-hole)
• Supply voltage compatibility (1.8V ~ 5.5V range)
• Operating temperature range (-40°C ~ 85°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The 93AA66C-I/P qualifies as a direct substitute based on identical memory capacity, organization, interface protocol, package type, voltage range, and temperature specifications. Performance characteristics including clock frequency and write cycle time may vary within the substitute, provided the substitute meets or exceeds the timing requirements of the original application.

Parameter Comparison

Engineering Selection Recommendations

The 93AA66C-I/P is a qualified equivalent substitute for the 93AA66-I/P. Both components maintain Active product status and satisfy ROHS3 and REACH compliance requirements. The substitute demonstrates improved performance characteristics with higher clock frequency (3 MHz versus 2 MHz) and reduced write cycle time (6ms versus 10ms), making it suitable for applications requiring faster memory access. Pin-to-pin compatibility and identical package specifications ensure direct replacement capability in existing PCB designs without layout modifications. Selection between the two parts should be based on application timing requirements and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 93AA66C-I/P replace the 93AA66-I/P in existing designs?

A: Yes. Both components share identical memory capacity, organization, Microwire interface, 8-PDIP package format, supply voltage range, and operating temperature specifications. Direct substitution is electrically and mechanically compatible.

Q: What are the performance differences between these parts?

A: The 93AA66C-I/P operates at 3 MHz clock frequency compared to 2 MHz for the 93AA66-I/P, and completes write cycles in 6ms versus 10ms. These represent performance improvements that do not compromise backward compatibility.

Q: Are there any compliance or certification differences?

A: Both parts maintain identical ROHS3 compliance and REACH Unaffected status. No compliance-related restrictions apply to substitution.

Q: Is PCB redesign required for substitution?

A: No. The 93AA66C-I/P uses the same 8-DIP through-hole package with identical pin spacing (0.300", 7.62mm). No PCB layout modifications are necessary.

Q: What supply voltage range do these components support?

A: Both the 93AA66-I/P and 93AA66C-I/P operate across 1.8V to 5.5V supply voltage, supporting a wide range of system architectures.

Q: Are these components suitable for industrial temperature applications?

A: Yes. Both parts are rated for -40°C to 85°C operating temperature range, meeting industrial specification requirements.