AT93C46-10SC EEPROM Equivalent & Substitute Parts

Part Overview

The AT93C46-10SC is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface operating at 2 MHz. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part is designed for non-volatile memory applications requiring serial access with standard 5V supply operation.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8, 64 x 16
Memory Interface	3-Wire Serial
Clock Frequency	2 MHz
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package	8-DIP (0.300", 7.62mm)
Write Cycle Time	10ms
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

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

Memory Capacity: 1Kbit (128 x 8 or 64 x 16 organization)
Serial Interface Protocol: 3-Wire Serial or Microwire compatible
Clock Frequency: 2 MHz operation
Supply Voltage Compatibility: Minimum 4.5V operation required for original specification
Package Type: Surface Mount (8-SOIC) alternatives available for design flexibility

The substitute parts listed below maintain functional equivalence through compatible memory capacity, serial interface protocols (Microwire is compatible with 3-Wire Serial), and clock frequency. All substitutes operate at 2 MHz and support 1Kbit memory organization. Surface Mount alternatives (8-SOIC) provide modern packaging options while maintaining electrical compatibility within overlapping voltage ranges.

Parameter Comparison

Parameter	AT93C46-10SC	CAV93C46VE-GT3	M93C46-RMN3TP/K	M93C46-WMN6P	M93C46-WMN6TP
Manufacturer	Microchip Technology	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	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	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	2 MHz	2 MHz
Voltage Supply Range	4.5V ~ 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 ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Write Cycle Time	10ms	—	5ms	5ms	5ms
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package	8-DIP	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualification	—	Yes	Yes	—	—

Engineering Selection Recommendations

For RoHS Compliance Requirements: All substitute parts (CAV93C46VE-GT3, M93C46-RMN3TP/K, M93C46-WMN6P, M93C46-WMN6TP) are ROHS3 compliant, whereas the AT93C46-10SC is RoHS non-compliant. Selection of any substitute part satisfies modern environmental compliance standards.

For Automotive Applications: CAV93C46VE-GT3 and M93C46-RMN3TP/K carry AEC-Q100 qualification, suitable for automotive-grade requirements. M93C46-WMN6P and M93C46-WMN6TP do not carry automotive qualification.

For Active Product Status: All substitute parts maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete AT93C46-10SC.

For Extended Temperature Range: CAV93C46VE-GT3 and M93C46-RMN3TP/K support -40°C ~ 125°C operating range, exceeding the original part's 0°C ~ 70°C specification. M93C46-WMN6P and M93C46-WMN6TP support -40°C ~ 85°C.

For Packaging Transition: All substitutes use 8-SOIC Surface Mount packaging. Through-hole designs requiring DIP packaging must implement adapter solutions or board redesign.

Frequently Asked Questions (FAQ)

Q: Can Microwire interface parts directly replace the 3-Wire Serial AT93C46-10SC?

A: Microwire is a compatible serial protocol for 1Kbit EEPROM memory access. The substitute parts listed (CAV93C46VE-GT3, M93C46-RMN3TP/K, M93C46-WMN6P, M93C46-WMN6TP) maintain functional equivalence through identical memory capacity (1Kbit), memory organization (128 x 8), and clock frequency (2 MHz). Interface protocol compatibility must be verified in the application circuit design.

Q: What is the voltage compatibility between AT93C46-10SC and substitute parts?

A: The AT93C46-10SC operates at 4.5V ~ 5.5V. All substitute parts support this voltage range: CAV93C46VE-GT3 (2.5V ~ 5.5V), M93C46-RMN3TP/K (1.8V ~ 5.5V), M93C46-WMN6P (2.5V ~ 5.5V), and M93C46-WMN6TP (2.5V ~ 5.5V). Substitutes provide extended lower voltage capability.

Q: Are there package compatibility considerations?

A: The AT93C46-10SC uses 8-DIP Through Hole packaging. All substitute parts use 8-SOIC Surface Mount packaging. PCB redesign or adapter solutions are required for mechanical and electrical integration.

Q: Which substitute part offers the best compliance profile?

A: M93C46-WMN6TP provides ROHS3 compliance, verified programmability status, and the highest inventory availability (61,180 pcs). CAV93C46VE-GT3 and M93C46-RMN3TP/K additionally carry AEC-Q100 automotive qualification for applications requiring automotive-grade components.

Q: What is the write cycle time difference between the original and substitutes?

A: The AT93C46-10SC specifies 10ms write cycle time. M93C46-RMN3TP/K, M93C46-WMN6P, and M93C46-WMN6TP specify 5ms write cycle time, providing improved performance. CAV93C46VE-GT3 does not specify write cycle time in available documentation.

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