Microchip 93LC46AX/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The Microchip 93LC46AX/SN is a 1Kbit EEPROM memory IC utilizing Microwire serial interface technology, housed in an 8-SOIC surface mount package. This non-volatile memory device operates at 2 MHz clock frequency with a 6ms write cycle time and is designed for applications requiring persistent data storage in compact form factors. The part is currently in active production status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, memory capacity, interface protocol, and package specifications are maintained across the Microchip 93xx6 EEPROM family.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	6ms
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC46AX/SN is determined by strict equivalence across the following critical parameters:

Memory capacity: 1Kbit (128 x 8 organization)
Serial interface protocol: Microwire
Clock frequency: 2 MHz
Write cycle time: 6ms
Package type: 8-SOIC surface mount
Physical dimensions: 0.154" width, 3.90mm
Regulatory compliance: ROHS3 and REACH status

Substitute parts within the Microchip 93xx6 family maintain identical memory specifications and package footprints. Variations occur in supply voltage ranges and operating temperature ratings, which determine application suitability based on system requirements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Interface	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Product Status
93LC46AX/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active
93AA46A-I/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
93AA46AE48-I/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
93AA46AX-I/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
93LC46A-I/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
93LC46A/SN	Microchip Technology	1Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active

Engineering Selection Recommendations

All listed substitute parts maintain active production status and ROHS3 compliance, qualifying them for direct functional replacement in applications where the 93LC46AX/SN is specified.

Selection between substitute options depends on system operating conditions:

For applications operating within 2.5V to 5.5V supply range and 0°C to 70°C temperature range, the 93LC46A/SN provides equivalent performance with verified programmability status.

For applications requiring extended temperature operation (-40°C to 85°C) or lower supply voltage tolerance (1.8V minimum), the 93AA46A-I/SN or 93LC46A-I/SN are suitable alternatives. The 93AA46A-I/SN offers verified programmability status and broader supply voltage range (1.8V ~ 5.5V).

The 93AA46AE48-I/SN and 93AA46AX-I/SN provide identical electrical specifications to the 93AA46A-I/SN with extended temperature and lower voltage capability, with inventory availability as the differentiating factor.

Frequently Asked Questions (FAQ)

Q: Can the 93AA46A-I/SN directly replace the 93LC46AX/SN in existing designs?

A: Yes. Both parts share identical memory capacity (1Kbit), Microwire interface, 2 MHz clock frequency, 6ms write cycle time, and 8-SOIC package footprint. The 93AA46A-I/SN extends the operating temperature range to -40°C ~ 85°C and supply voltage range to 1.8V ~ 5.5V, making it compatible with the 93LC46AX/SN's specified operating window (0°C ~ 70°C, 2.5V ~ 5.5V).

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

A: The primary distinction is supply voltage range. The 93LC46 series operates from 2.5V to 5.5V, while the 93AA46 series operates from 1.8V to 5.5V. Both series maintain identical memory specifications, interface protocol, and package format. Selection depends on minimum supply voltage requirements in the target application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for electronic component procurement.

Q: Does package marking affect substitution eligibility?

A: Package marking variations (such as -I/SN suffix) indicate different manufacturing batches or test conditions but do not affect electrical equivalence or functional compatibility. All parts listed maintain 8-SOIC surface mount package specifications with 0.154" width and 3.90mm dimensions.

Q: What inventory considerations apply to substitute selection?

A: The 93AA46A-I/SN maintains the highest inventory availability (24,995 units), followed by 93LC46A-I/SN (5,719 units). Inventory levels should be evaluated against project lead time and volume requirements.

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