AT93C46-10SC-2.7 Equivalent & Substitute Parts

Part Overview

The AT93C46-10SC-2.7 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 substitute components necessary for new designs and ongoing production requirements. The 3-Wire Serial interface and 1Kbit capacity define the core functional requirements for equivalent substitution.

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	2.7V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Write Cycle Time	10ms
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the AT93C46-10SC-2.7 is based on the following critical parameters:

Primary Compatibility Criteria:

Memory capacity: 1Kbit
Package type: 8-SOIC surface mount
Serial interface protocol: 3-Wire Serial or Microwire (compatible protocol)
Clock frequency: 2 MHz
Voltage supply overlap: minimum 2.7V support

Substitution Logic: The AT93C46-10SC-2.7 uses 3-Wire Serial interface. Microwire protocol is functionally compatible with 3-Wire Serial for this memory class, as both support the same pin configuration and data transfer methodology. All substitute parts maintain 1Kbit capacity, 8-SOIC packaging, and 2 MHz operation. Voltage supply ranges and operating temperature ranges vary among substitutes but must overlap with the original specification minimum of 2.7V.

Parameter Comparison

Parameter	AT93C46-10SC-2.7	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
Interface	3-Wire Serial	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	2 MHz	2 MHz
Voltage Supply Range	2.7V ~ 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
Package / Case	8-SOIC	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 Standard Industrial Applications: M93C46-WMN6TP is the primary substitute. This part is active, ROHS3 compliant, maintains full 1Kbit capacity with 128 x 8 and 64 x 16 organization, operates at 2 MHz, and supports the required voltage range. Write cycle time is improved at 5ms versus the original 10ms. Inventory availability is highest at 61,180 units. DiGi-Electronics programmable verification is confirmed.

For Automotive Applications: CAV93C46VE-GT3 (onsemi) or M93C46-RMN3TP/K (STMicroelectronics) are qualified options. Both carry AEC-Q100 automotive qualification. M93C46-RMN3TP/K offers the widest voltage supply range (1.8V ~ 5.5V) and extended temperature range (-40°C ~ 125°C). CAV93C46VE-GT3 provides automotive-grade reliability with equivalent specifications.

For Extended Temperature Range Requirements: M93C46-RMN3TP/K and CAV93C46VE-GT3 both support -40°C ~ 125°C operating temperature, exceeding the original 0°C ~ 70°C specification.

Compliance Considerations: All substitute parts are ROHS3 compliant, addressing the non-compliance status of the original AT93C46-10SC-2.7. All parts maintain REACH unaffected status and EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can Microwire interface parts directly replace the 3-Wire Serial AT93C46-10SC-2.7? A: Yes. Microwire is functionally compatible with 3-Wire Serial protocol for 1Kbit EEPROM devices in this package class. Both protocols support identical pin configurations and serial data transfer methods.

Q: What is the minimum voltage requirement for substitutes? A: The original part requires 2.7V minimum. M93C46-RMN3TP/K supports 1.8V minimum, providing additional margin. CAV93C46VE-GT3 and M93C46-WMN6TP/M93C46-WMN6P support 2.5V minimum, which is compatible with the original 2.7V specification.

Q: Are all substitutes available in the same 8-SOIC package? A: Yes. All substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB layout compatibility.

Q: What is the difference between M93C46-WMN6TP and M93C46-WMN6P? A: Both are STMicroelectronics M93C46 variants with identical electrical specifications. M93C46-WMN6TP is supplied in Cut Tape & Digi-Reel packaging with 61,180 units in stock and verified programmability. M93C46-WMN6P is supplied in Tube packaging with 3,485 units in stock. Select based on packaging and inventory requirements.

Q: Does the improved write cycle time (5ms vs 10ms) affect compatibility? A: No. Faster write cycle time is a performance improvement that maintains backward compatibility. Systems designed for 10ms write cycles will function correctly with 5ms write cycle parts.

Q: Which substitute offers the best compliance profile? A: All substitutes are ROHS3 compliant and REACH unaffected. CAV93C46VE-GT3 and M93C46-RMN3TP/K carry AEC-Q100 automotive qualification for applications requiring automotive-grade reliability.

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