AT93C46-10SI-1.8 Equivalent & Substitute Parts

Part Overview

The AT93C46-10SI-1.8 is a 1Kbit EEPROM memory IC with 3-Wire Serial interface, manufactured by Microchip Technology in 8-SOIC surface mount packaging. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The device operates across a wide supply voltage range of 1.8V to 5.5V with a 2 MHz clock frequency, suitable for embedded systems requiring non-volatile memory storage.

Substiute Parts

AT93C46-10SI-1.8

Microchip TechnologyIn Stock: 10202AT93C46-10SI-1.8 Datasheet

Current PartRFQ

AT93C46DN-SH-B

Microchip TechnologyIn Stock: 20128AT93C46DN-SH-B Datasheet

MFR RecommendedRFQ

CAV93C46VE-GT3

onsemiIn Stock: 3722CAV93C46VE-GT3 Datasheet

MFR RecommendedRFQ

M93C46-RMN3TP/K

STMicroelectronicsIn Stock: 9539M93C46-RMN3TP/K Datasheet

MFR RecommendedRFQ

M93C46-WMN6P

STMicroelectronicsIn Stock: 3499M93C46-WMN6P Datasheet

MFR RecommendedRFQ

M93C46-WMN6TP

STMicroelectronicsIn Stock: 61219M93C46-WMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT93C46-10SI-1.8 is determined by the following critical parameters:

• Memory capacity: 1Kbit
• Package type: 8-SOIC form factor
• Memory interface protocol: 3-Wire Serial or Microwire (compatible protocols)
• Clock frequency: 2 MHz
• Supply voltage compatibility: Minimum 1.8V support required
• Operating temperature range: -40°C minimum

The substitute parts listed maintain identical memory capacity, organization, and physical packaging. Interface compatibility includes both 3-Wire Serial and Microwire protocols, as these are functionally equivalent for this memory class. All substitutes operate at 2 MHz and support the required temperature range. Voltage supply ranges vary among substitutes but all maintain compatibility with the original 1.8V to 5.5V specification or exceed it.

Parameter Comparison

Engineering Selection Recommendations

AT93C46DN-SH-B (Microchip Technology) is the primary substitute for direct replacement. This part maintains identical electrical specifications including 1.8V to 5.5V supply voltage range and -40°C to 85°C operating temperature. It features active product status with ROHS3 compliance and improved write cycle time of 5ms compared to the original 10ms specification. The 3-Wire Serial interface matches the original protocol exactly.

M93C46-WMN6TP (STMicroelectronics) offers the highest inventory availability (61,180 pcs) with active status and verified programmability. This part operates at 2.5V to 5.5V supply voltage and maintains the same temperature range as the original. The Microwire interface is functionally compatible with 3-Wire Serial protocol for this memory class. Write cycle time is 5ms.

M93C46-RMN3TP/K (STMicroelectronics) supports the full 1.8V to 5.5V voltage range matching the original specification and extends operating temperature to -40°C to 125°C. Microwire interface provides functional compatibility. This part carries AEC-Q100 automotive qualification.

CAV93C46VE-GT3 (onsemi) extends operating temperature to -40°C to 125°C and includes AEC-Q100 automotive qualification. Supply voltage range is 2.5V to 5.5V. Microwire interface is functionally compatible. This part is suitable for automotive and extended temperature applications.

M93C46-WMN6P (STMicroelectronics) operates at 2.5V to 5.5V with -40°C to 85°C temperature range. Microwire interface provides functional compatibility with active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use a Microwire interface part as a substitute for the 3-Wire Serial AT93C46-10SI-1.8?

A: Yes. Microwire and 3-Wire Serial are functionally compatible protocols for this 1Kbit EEPROM memory class. Both protocols support the same memory organization, clock frequency, and data transfer characteristics required for this application.

Q: What is the key difference between AT93C46DN-SH-B and the M93C46 series substitutes?

A: AT93C46DN-SH-B maintains the original 3-Wire Serial interface protocol, while M93C46 parts use Microwire protocol. Both are functionally equivalent. AT93C46DN-SH-B also supports the full 1.8V to 5.5V voltage range, whereas most M93C46 variants operate at 2.5V to 5.5V. M93C46-RMN3TP/K is the exception, supporting 1.8V to 5.5V.

Q: Does the improved write cycle time in substitute parts affect compatibility?

A: No. The substitute parts feature 5ms write cycle time compared to the original 10ms specification. This is an improvement that maintains full backward compatibility. Systems designed for 10ms write cycles will function correctly with faster write cycle times.

Q: Which substitute is best for low voltage applications below 2.5V?

A: AT93C46DN-SH-B or M93C46-RMN3TP/K are required for applications requiring operation below 2.5V, as both support the full 1.8V to 5.5V voltage range. Other substitutes operate at minimum 2.5V supply voltage.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. The original AT93C46-10SI-1.8 is RoHS non-compliant, making substitution necessary for RoHS-regulated applications.

Q: What packaging options are available for these substitutes?

A: All substitute parts are available in 8-SOIC surface mount packaging identical to the original. Packaging formats vary by part number: AT93C46DN-SH-B is supplied in Tube, M93C46-RMN3TP/K and M93C46-WMN6TP in Cut Tape with Digi-Reel, M93C46-WMN6P in Tube, and CAV93C46VE-GT3 in Tape & Reel.

Q: Can I use automotive-qualified parts in non-automotive applications?

A: Yes. Automotive-qualified parts (CAV93C46VE-GT3 and M93C46-RMN3TP/K with AEC-Q100 certification) meet or exceed standard industrial specifications and are suitable for any application within their electrical and temperature specifications.