93LC46AX-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46AX-I/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This non-volatile memory device operates at 2 MHz clock frequency with a 6ms write cycle time and supports supply voltages from 2.5V to 5.5V across the industrial temperature range of -40°C to 85°C. The part is ROHS3 compliant and carries active product status. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters.

Key Parameters

Parameter	Specification
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	6ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC46AX-I/SN is determined by the following critical parameters:

Memory Capacity & Organization: All substitute parts must provide 1Kbit capacity in 128 x 8 organization
Interface Protocol: Microwire serial interface is mandatory for protocol compatibility
Package & Pinout: 8-SOIC surface mount package with identical pin configuration
Clock Frequency: 2 MHz operation required
Write Cycle Time: 6ms specification must be maintained
Temperature Range: -40°C to 85°C operating range
RoHS Compliance: ROHS3 compliant status

The substitute parts identified below meet all these criteria. Voltage supply range variations (1.8V ~ 5.5V versus 2.5V ~ 5.5V) represent extended lower-voltage capability and do not restrict substitution in applications requiring 2.5V minimum supply.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Organization	Interface	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Product Status	Inventory
93LC46AX-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	982 Pcs
93AA46A-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	24995 Pcs
93AA46AE48-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	1258 Pcs
93AA46AX-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	826 Pcs
93LC46A-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	5719 Pcs

Engineering Selection Recommendations

All identified substitute parts maintain active product status with ROHS3 compliance and REACH unaffected designation. Selection between substitute options should be based on application-specific voltage supply requirements and inventory availability.

For applications with supply voltage minimum of 2.5V, the 93LC46A-I/SN offers the highest inventory availability (5719 Pcs) while maintaining identical electrical and mechanical specifications to the primary part 93LC46AX-I/SN.

For applications requiring extended lower-voltage operation down to 1.8V, the 93AA46A-I/SN provides the largest inventory stock (24995 Pcs) with verified programmability status. The 93AA46AX-I/SN and 93AA46AE48-I/SN offer additional 1.8V-rated alternatives with lower inventory levels.

All substitute parts share identical memory capacity, interface protocol, package configuration, and thermal specifications, ensuring direct functional equivalence within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can 93AA46A-I/SN replace 93LC46AX-I/SN in a 3.3V application?

A: Yes. The 93AA46A-I/SN operates across 1.8V to 5.5V supply range, which encompasses the 3.3V operating point. The 93LC46AX-I/SN operates from 2.5V to 5.5V. Both parts are functionally equivalent at 3.3V with identical memory capacity, interface, and timing specifications.

Q: What is the difference between 93AA46 and 93LC46 base part numbers?

A: The base part number designates the voltage supply range. 93AA46 variants support 1.8V minimum supply voltage, while 93LC46 variants require 2.5V minimum supply voltage. All other electrical and mechanical parameters remain identical.

Q: Are all substitute parts pin-compatible?

A: Yes. All listed substitute parts use the 8-SOIC package with 0.154" width and 3.90mm body dimension. Pin configuration and functionality are identical across all parts, enabling direct PCB-level substitution.

Q: Does the write cycle time differ between substitute parts?

A: No. All parts maintain 6ms write cycle time specification for word and page operations. Timing performance is consistent across the entire substitute group.

Q: What inventory considerations apply to part selection?

A: The 93AA46A-I/SN maintains the highest inventory level at 24995 Pcs. The 93LC46A-I/SN provides 5719 Pcs availability. The 93AA46AX-I/SN and 93AA46AE48-I/SN offer lower inventory quantities at 826 Pcs and 1258 Pcs respectively. Selection should account for supply chain requirements and lead time considerations.

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