AT93C46-10SC-1.8 Equivalent & Substitute Parts

Part Overview

The AT93C46-10SC-1.8 is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring 3-Wire Serial interface with 2 MHz clock frequency and 1.8V to 5.5V supply voltage range. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part is housed in an 8-SOIC surface mount package with RoHS non-compliant status and unlimited moisture sensitivity level (MSL 1).

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 / Microwire
Clock Frequency	2 MHz
Voltage Supply Range	1.8V ~ 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

Substitute Part Grouping Explanation

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

Memory Capacity: 1Kbit (128 x 8 or 64 x 16 organization)
Package Type: 8-SOIC surface mount form factor
Interface Protocol: 3-Wire Serial or Microwire (functionally compatible serial protocols)
Clock Frequency: 2 MHz operation
Supply Voltage: Minimum 1.8V support required for direct replacement
Physical Dimensions: 0.154" width, 3.90mm standard SOIC spacing

All substitute parts listed maintain identical memory capacity, package footprint, and clock frequency specifications. Interface compatibility is established through Microwire protocol support, which is functionally equivalent to 3-Wire Serial for this memory class. Voltage supply ranges and operating temperature specifications vary among substitutes but remain within acceptable industrial and automotive operating conditions.

Parameter Comparison

Parameter	AT93C46-10SC-1.8	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	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 ~ 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	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualification	—	Yes	Yes	—	—

Engineering Selection Recommendations

For Active Production and New Designs:

M93C46-WMN6TP is the primary recommended substitute. This part maintains full compatibility with the AT93C46-10SC-1.8 across all critical electrical parameters, operates across the required temperature range, and carries ROHS3 compliance certification. The part is verified as programmable and maintains the highest inventory availability (61,180 units in stock), ensuring supply chain continuity.

For Automotive Applications:

CAV93C46VE-GT3 and M93C46-RMN3TP/K both carry AEC-Q100 automotive qualification. M93C46-RMN3TP/K extends the supply voltage range to 1.8V minimum, matching the original part specification exactly, and supports the full 128 x 8 and 64 x 16 memory organization. This part is suitable for automotive-grade applications requiring extended temperature operation (-40°C to 125°C).

For Legacy System Maintenance:

M93C46-WMN6P provides an alternative with tube packaging and maintains ROHS3 compliance. Operating temperature range extends to -40°C, supporting broader environmental conditions than the original part.

Voltage Supply Consideration:

Applications requiring 1.8V minimum supply voltage operation must select M93C46-RMN3TP/K, as CAV93C46VE-GT3 and M93C46-WMN6 series parts specify 2.5V minimum supply voltage.

Frequently Asked Questions (FAQ)

Q: Can M93C46-WMN6TP directly replace AT93C46-10SC-1.8 in existing PCB designs?

A: Yes. Both parts use identical 8-SOIC package footprint with 0.154" width and 3.90mm spacing. Pin-to-pin compatibility is maintained. The Microwire interface is functionally equivalent to 3-Wire Serial protocol for this memory class. PCB layout and footprint files require no modification.

Q: What is the difference between 3-Wire Serial and Microwire interfaces?

A: Both protocols are serial communication standards for EEPROM memory devices operating at 2 MHz. Microwire is the industry-standard implementation of 3-Wire Serial protocol. Devices supporting Microwire interface are compatible with 3-Wire Serial applications.

Q: Does the 2.5V minimum supply voltage of CAV93C46VE-GT3 and M93C46-WMN6 series create compatibility issues?

A: Applications operating at 1.8V supply voltage cannot use parts with 2.5V minimum specification. For 1.8V systems, select M93C46-RMN3TP/K, which maintains 1.8V minimum supply voltage matching the original AT93C46-10SC-1.8.

Q: Why is M93C46-WMN6TP recommended over other substitutes?

A: M93C46-WMN6TP combines active product status, ROHS3 compliance, verified programmability, highest inventory availability (61,180 units), and fastest write cycle time (5ms versus 10ms original). These factors ensure supply reliability and performance improvement for new production.

Q: Are substitute parts backward compatible with existing firmware and software?

A: Yes. All substitute parts maintain identical memory capacity (1Kbit), organization (128 x 8 or 64 x 16), and 2 MHz clock frequency. Microwire protocol compatibility ensures existing firmware and software require no modification.

Q: What packaging options are available for substitute parts?

A: M93C46-RMN3TP/K is supplied in Cut Tape and Digi-Reel format. M93C46-WMN6TP is supplied in Cut Tape and Digi-Reel format. M93C46-WMN6P is supplied in Tube packaging. CAV93C46VE-GT3 is supplied in Tape & Reel format. Select packaging based on production volume and assembly requirements.

Q: Do substitute parts support the same memory organization options?

A: M93C46-RMN3TP/K, M93C46-WMN6P, and M93C46-WMN6TP support both 128 x 8 and 64 x 16 organization, matching the original part. CAV93C46VE-GT3 supports 128 x 8 organization only.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message