93LC46AT-I/OTG EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46AT-I/OTG is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and SOT-23-6 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 an industrial temperature range of -40°C to 85°C. The part is ROHS3 compliant and carries unlimited moisture sensitivity level rating. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Specification
Memory Format	EEPROM
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	SOT-23-6
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 93LC46AT-I/OTG are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Memory capacity: 1Kbit (128 x 8 organization)
Interface protocol: Microwire serial interface
Clock frequency: 2 MHz operation
Package: SOT-23-6 surface mount
Write cycle time: 6ms
Mounting type: Surface mount

Secondary Compatibility Factors:

Supply voltage range compatibility with 2.5V ~ 5.5V minimum requirement
Operating temperature range coverage of -40°C to 85°C minimum
RoHS3 compliance status
Non-volatile EEPROM technology

Substitutes are grouped into two categories: direct pin-compatible replacements within the 93LC46 series (same voltage range 2.5V ~ 5.5V) and extended-range alternatives from the 93AA46 series (1.8V ~ 5.5V supply voltage), which provide backward compatibility with the original part's operating conditions while offering expanded lower voltage capability.

Parameter Comparison

Parameter	93LC46AT-I/OTG (Main)	93LC46AT-I/OT	93LC46AT-E/OT	93AA46AT-I/OT	93AA46AE48T-I/OT
Memory Format	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8
Memory Interface	Microwire	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	6ms	6ms	6ms	6ms	6ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

93LC46AT-I/OT is a direct equivalent to the 93LC46AT-I/OTG, maintaining identical electrical specifications and temperature range. Both parts carry Active product status and ROHS3 compliance. This substitute is suitable for applications requiring no design modification.

93LC46AT-E/OT provides extended operating temperature range coverage to -40°C ~ 125°C while maintaining the same 2.5V ~ 5.5V supply voltage specification. This substitute is applicable in applications requiring enhanced thermal performance within industrial temperature extremes.

93AA46AT-I/OT and 93AA46AE48T-I/OT extend the lower supply voltage limit to 1.8V while maintaining full compatibility with the 2.5V ~ 5.5V operating range of the original part. These substitutes are suitable for applications requiring operation at reduced supply voltages or in battery-powered systems with lower voltage rails. Both maintain the -40°C ~ 85°C temperature specification and ROHS3 compliance status.

All substitute parts maintain identical memory capacity, interface protocol, clock frequency, write cycle time, package type, and mounting configuration, ensuring pin-level and functional compatibility with the original 93LC46AT-I/OTG design.

Frequently Asked Questions (FAQ)

Q: Can 93AA46AT-I/OT replace 93LC46AT-I/OTG in existing designs without circuit modification?

A: Yes. The 93AA46AT-I/OT is pin-compatible and functionally equivalent. The extended lower voltage specification (1.8V minimum) is backward compatible with the original part's 2.5V minimum requirement. No circuit changes are required.

Q: What is the primary difference between 93LC46 and 93AA46 series parts?

A: The 93AA46 series supports extended lower supply voltage operation down to 1.8V, compared to the 93LC46 series minimum of 2.5V. Both series maintain identical memory capacity, interface protocol, and package specifications.

Q: Is 93LC46AT-E/OT suitable for high-temperature applications?

A: The 93LC46AT-E/OT supports operating temperatures to 125°C, compared to 85°C for the original 93LC46AT-I/OTG. This extended range is applicable for applications requiring thermal performance beyond standard industrial specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original 93LC46AT-I/OTG specification.

Q: What packaging options are available for these EEPROM parts?

A: All parts listed are supplied in SOT-23-6 surface mount package. Packaging format options include Tape & Reel (TR) and Cut Tape (CT) with Digi-Reel configurations, depending on the specific part number variant.

Q: Can these parts be used interchangeably in Microwire protocol applications?

A: Yes. All substitute parts maintain the 2 MHz Microwire serial interface specification, ensuring protocol-level compatibility in applications using Microwire communication standards.

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