AT93C46R-10SC-2.5 Equivalent & Substitute Parts

Part Overview

The AT93C46R-10SC-2.5 is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring 3-Wire Serial interface with 2 MHz clock frequency in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The device supports 128 x 8 or 64 x 16 memory organization with 10ms write cycle time and operates across 2.5V to 5.5V supply voltage range.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Format	EEPROM
Memory Organization	128 x 8, 64 x 16
Memory Interface	3-Wire Serial
Clock Frequency	2 MHz
Write Cycle Time	10ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the AT93C46R-10SC-2.5 is determined by the following critical parameters:

Memory capacity: 1Kbit
Package type: 8-SOIC with identical physical dimensions
Memory interface: 3-Wire Serial or Microwire (compatible protocols for this device class)
Clock frequency: 2 MHz
Supply voltage compatibility: Minimum 2.5V support required

The substitute parts listed maintain functional equivalence through identical memory organization, package footprint, and interface protocol compatibility. All substitutes are active products with improved specifications including faster write cycles, extended temperature ranges, and enhanced compliance certifications.

Parameter Comparison

Parameter	AT93C46R-10SC-2.5	AT93C46DN-SH-B	CAV93C46VE-GT3	M93C46-RMN3TP/K	M93C46-WMN6P	M93C46-WMN6TP
Manufacturer	Microchip Technology	Microchip Technology	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	128 x 8, 64 x 16	128 x 8, 64 x 16	128 x 8	128 x 8, 64 x 16	128 x 8, 64 x 16	128 x 8, 64 x 16
Memory Interface	3-Wire Serial	3-Wire Serial	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	10ms	5ms	—	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: AT93C46DN-SH-B

The AT93C46DN-SH-B is the direct Microchip Technology equivalent with active product status and verified programmability. It maintains the same 3-Wire Serial interface protocol as the original part while offering improved specifications: extended supply voltage range (1.8V ~ 5.5V), wider operating temperature range (-40°C ~ 85°C), and faster write cycle time (5ms). RoHS3 compliance and active inventory status support long-term production continuity.

Secondary Recommendation: M93C46-WMN6TP

The M93C46-WMN6TP from STMicroelectronics provides the highest inventory availability (61,180 pcs) with verified programmability. This part uses Microwire interface protocol, which is functionally compatible with 3-Wire Serial for this device class. It offers identical memory capacity, organization, and clock frequency with improved write cycle performance (5ms) and RoHS3 compliance. Operating temperature range extends to -40°C ~ 85°C.

Automotive-Grade Option: M93C46-RMN3TP/K

For applications requiring automotive qualification, the M93C46-RMN3TP/K meets AEC-Q100 standards with extended operating temperature range (-40°C ~ 125°C). This STMicroelectronics part maintains full functional compatibility and offers the widest supply voltage range (1.8V ~ 5.5V) among all substitutes.

Extended Temperature Option: CAV93C46VE-GT3

The CAV93C46VE-GT3 from onsemi provides the highest operating temperature range (-40°C ~ 125°C) with automotive-grade qualification (AEC-Q100). Microwire interface compatibility and RoHS3 compliance make this suitable for demanding thermal environments.

Frequently Asked Questions (FAQ)

Q: Can I use Microwire interface parts as direct replacements for the 3-Wire Serial AT93C46R-10SC-2.5?

A: Yes. Microwire and 3-Wire Serial protocols are functionally compatible for this 1Kbit EEPROM device class. Both protocols support identical memory organization (128 x 8, 64 x 16), clock frequency (2 MHz), and data access patterns. The M93C46 series (Microwire) and AT93C46 series (3-Wire Serial) are established cross-compatible alternatives in industrial applications.

Q: What is the difference between the write cycle times listed?

A: The original AT93C46R-10SC-2.5 specifies 10ms write cycle time. All active substitute parts offer improved performance with 5ms write cycle time, reducing overall programming duration by 50%. This represents a specification enhancement with no compatibility impact.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. The original AT93C46R-10SC-2.5 is RoHS non-compliant due to its obsolete status. Transition to any substitute part ensures regulatory compliance for new designs.

Q: Which substitute part has the widest operating temperature range?

A: Both CAV93C46VE-GT3 and M93C46-RMN3TP/K support -40°C ~ 125°C operating temperature range, compared to the original part's 0°C ~ 70°C specification. These parts are suitable for extended temperature applications.

Q: Do all substitute parts maintain the same 8-SOIC package footprint?

A: Yes. All substitute parts use identical 8-SOIC packaging (0.154", 3.90mm width) with surface mount configuration. Direct PCB footprint compatibility is maintained across all alternatives.

Q: What inventory status should I consider for production planning?

A: M93C46-WMN6TP offers the highest inventory availability at 61,180 pcs. AT93C46DN-SH-B provides 20,100 pcs. All listed parts maintain active product status with ongoing manufacturing support, ensuring long-term supply chain stability compared to the obsolete original part.

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