93C46AXT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C46AXT-E/SN is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring Microwire serial interface communication. This device operates at 2 MHz clock frequency with a supply voltage range of 4.5V to 5.5V and is housed in an 8-SOIC surface mount package. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and operating specifications align with application requirements.

Substiute Parts

93C46AXT-E/SN

Microchip TechnologyIn Stock: 69793C46AXT-E/SN Datasheet

Current PartRFQ

93LC46AT-E/SN

Microchip TechnologyIn Stock: 343893LC46AT-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93C46AXT-E/SN is determined by the following critical parameters:

• Memory Capacity: 1Kbit (128 x 8 organization) is the primary functional requirement
• Serial Interface: Microwire protocol compatibility is mandatory for circuit integration
• Package Form Factor: 8-SOIC surface mount package ensures mechanical and thermal compatibility
• Operating Temperature: -40°C to 125°C range must be maintained or exceeded
• Supply Voltage Compatibility: Substitute parts must operate within overlapping voltage ranges
• Compliance Standards: RoHS3 and REACH compliance status must be maintained

The 93LC46AT-E/SN qualifies as a direct substitute based on identical memory capacity, Microwire interface, 8-SOIC package, and matching operating temperature range. Voltage supply range differences and write cycle time variations are secondary parameters that do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Both the 93C46AXT-E/SN and 93LC46AT-E/SN maintain active production status with equivalent RoHS3 and REACH compliance certifications. The 93LC46AT-E/SN offers extended supply voltage range compatibility (2.5V minimum versus 4.5V minimum), providing operational flexibility in low-voltage applications. The primary trade-off is write cycle time: the 93C46AXT-E/SN completes word/page write operations in 2ms, while the 93LC46AT-E/SN requires 6ms. Selection between these parts depends on application-specific timing requirements and supply voltage constraints. Both parts are suitable for applications requiring 1Kbit Microwire EEPROM functionality in 8-SOIC surface mount packages.

Frequently Asked Questions (FAQ)

Q: Can the 93LC46AT-E/SN replace the 93C46AXT-E/SN in existing designs?

A: Yes, provided the application can accommodate the extended write cycle time (6ms versus 2ms) and the circuit supply voltage is compatible with the 2.5V to 5.5V range of the substitute part.

Q: Are there differences in package dimensions between these parts?

A: No. Both parts use identical 8-SOIC (0.154", 3.90mm Width) surface mount packages with matching pin configurations and thermal characteristics.

Q: What is the primary functional difference between these EEPROM variants?

A: The 93LC46AT-E/SN supports lower minimum supply voltage (2.5V) compared to the 93C46AXT-E/SN (4.5V), while the 93C46AXT-E/SN offers faster write cycle performance (2ms versus 6ms).

Q: Do both parts meet current compliance requirements?

A: Yes. Both the 93C46AXT-E/SN and 93LC46AT-E/SN are RoHS3 compliant, REACH unaffected, and maintain active production status.

Q: Is the Microwire interface protocol identical between these parts?

A: Yes. Both parts implement the Microwire serial interface protocol at 2 MHz clock frequency with identical memory organization (128 x 8 bits).