93LC46AXT/SN Equivalent & Substitute Parts

Part Overview

The 93LC46AXT/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. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical specifications, memory organization, interface protocol, and physical packaging remain identical across temperature and packaging variants.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the 93LC46AXT/SN are qualified based on the following criteria:

Core Electrical Parameters (Must Match):

Memory capacity: 1Kbit
Memory organization: 128 x 8 bits
Interface protocol: Microwire serial
Clock frequency: 2 MHz
Write cycle time: 6ms
Supply voltage range: 2.5V ~ 5.5V
Package type: 8-SOIC with 0.154" (3.90mm) width

Allowed Variations:

Operating temperature range (within manufacturer specifications)
Packaging format (Tape & Reel, Cut Tape, or Digi-Reel)
Moisture sensitivity level (MSL rating)
DiGi-Electronics programmable verification status

All substitute parts maintain identical functional performance and pinout compatibility with the main part number.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Interface	Frequency	Supply Voltage	Operating Temp	Package	Packaging Format	MSL Rating	Product Status
93LC46AXT/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Tape & Reel	1 (Unlimited)	Active
93LC46AT-E/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Cut Tape	1 (Unlimited)	Active
93LC46AT-I/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	3 (168 Hours)	Active
93LC46AT/SN	Microchip Technology	1Kbit	128 x 8	Microwire	2 MHz	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Tape & Reel	1 (Unlimited)	Active

Engineering Selection Recommendations

All substitute parts maintain identical core electrical and functional specifications. Selection between 93LC46AXT/SN and its substitutes depends on application-specific requirements:

93LC46AT-E/SN is suitable for applications requiring extended operating temperature range (-40°C to 125°C) with Cut Tape packaging format.

93LC46AT-I/SN supports intermediate operating temperature range (-40°C to 85°C) and offers flexible packaging options including Digi-Reel format, with MSL rating of 3 (168 hours).

93LC46AT/SN matches the original part's operating temperature range (0°C to 70°C) and packaging format (Tape & Reel) with MSL rating of 1 (Unlimited).

All parts carry Active product status, ROHS3 compliance, and REACH unaffected designation. Selection should align with supply chain availability, packaging requirements, and temperature operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Can 93LC46AT-E/SN replace 93LC46AXT/SN in all applications?

A: Yes, provided the application operates within the overlapping temperature range (0°C to 70°C). The 93LC46AT-E/SN supports extended temperature operation to 125°C, making it suitable for wider temperature environments. Packaging format differs (Cut Tape vs. Tape & Reel), which may affect procurement and assembly processes.

Q: What is the difference between MSL ratings 1 and 3?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and can be stored indefinitely before soldering. MSL 3 (168 hours) requires the component to be soldered within 168 hours of exposure to moisture, necessitating controlled storage conditions and bake-out procedures if storage limits are exceeded.

Q: Are all substitute parts pin-compatible with the original 93LC46AXT/SN?

A: Yes. All substitute parts use identical 8-SOIC packaging with 0.154" (3.90mm) width and maintain the same pinout configuration. Direct board-level substitution is supported without layout modifications.

Q: What determines if a part is a valid substitute?

A: Valid substitutes must maintain identical memory capacity (1Kbit), organization (128 x 8), interface protocol (Microwire), clock frequency (2 MHz), write cycle time (6ms), supply voltage range (2.5V to 5.5V), and physical package type (8-SOIC). Operating temperature range, packaging format, and MSL rating may vary based on application requirements.

Q: Can 93LC46AT-I/SN be used in applications requiring MSL 1 rating?

A: No. The 93LC46AT-I/SN carries MSL 3 rating, which requires moisture control and bake-out procedures. Applications with strict MSL 1 requirements must use 93LC46AXT/SN or 93LC46AT/SN.

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