93LC66AX-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC66AX-E/SN is a 4Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, utilizing Microwire serial interface protocol. This component is designed for applications requiring persistent data storage with low power consumption and wide voltage tolerance. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, memory organization, interface protocol, and physical packaging are maintained across the product line.

Substiute Parts

93LC66AX-E/SN

Microchip TechnologyIn Stock: 80793LC66AX-E/SN Datasheet

Current PartRFQ

93LC66A-E/SN

Microchip TechnologyIn Stock: 325893LC66A-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC66AX-E/SN is determined by strict equivalence across the following critical parameters:

• Memory Capacity & Organization: 4Kbit capacity with 512 x 8 bit organization
• Serial Interface Protocol: Microwire interface compatibility
• Operating Frequency: 2 MHz clock frequency
• Electrical Specifications: Supply voltage range 2.5V ~ 5.5V and write cycle time of 6ms
• Physical Package: 8-SOIC surface mount package with identical pin configuration
• Compliance & Certifications: RoHS3 compliance and MSL Level 1 rating

The 93LC66A-E/SN qualifies as a direct substitute based on identical electrical and mechanical specifications within the Microchip 93LC66 product family.

Parameter Comparison

Engineering Selection Recommendations

The 93LC66A-E/SN is a qualified substitute for the 93LC66AX-E/SN based on complete electrical and mechanical equivalence. Both parts maintain identical memory specifications, interface protocol, voltage tolerance, temperature range, and physical packaging. Both components carry active product status from Microchip Technology and meet RoHS3 compliance requirements with MSL Level 1 rating. The 93LC66A-E/SN is verified as programmable through DiGi-Electronics, with higher inventory availability (3200 pcs vs. 698 pcs). Selection between these parts may be determined by supply chain availability and procurement lead times, as no functional or performance differentiation exists.

Frequently Asked Questions (FAQ)

Q: Can the 93LC66A-E/SN be used as a direct replacement for the 93LC66AX-E/SN in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including memory capacity, interface protocol, voltage range, temperature range, and 8-SOIC package configuration. No circuit modifications are required.

Q: Are there any differences in the Microwire interface implementation between these parts?

A: No. Both parts implement the Microwire serial interface protocol at 2 MHz clock frequency with identical timing specifications and pin configuration.

Q: What is the significance of the "A" designation in the part number 93LC66A-E/SN?

A: The "A" designation indicates a variant within the Microchip 93LC66 product family. In this case, the 93LC66A-E/SN maintains full compatibility with the 93LC66AX-E/SN across all electrical and mechanical specifications.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the 93LC66AX-E/SN and 93LC66A-E/SN operate across the identical temperature range of -40°C to 125°C.

Q: Do both parts meet the same compliance and certification standards?

A: Yes. Both parts are RoHS3 compliant, carry MSL Level 1 rating, and are REACH unaffected. Both are classified under ECCN EAR99 and HTSUS 8542.32.0051.

Q: Is there a difference in supply voltage tolerance between these parts?

A: No. Both parts accept supply voltage in the range of 2.5V to 5.5V with identical electrical characteristics.