M93C46-MN6TP EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The M93C46-MN6TP is a 1Kbit EEPROM memory integrated circuit manufactured by STMicroelectronics, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This device operates at 2 MHz clock frequency with a 5ms write cycle time and supports supply voltages from 4.5V to 5.5V across an operating temperature range of -40°C to 85°C.

The M93C46-MN6TP is classified as an obsolete product. Equivalent and substitute parts are necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for legacy systems and applications requiring 1Kbit Microwire EEPROM functionality in 8-SOIC packaging.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8, 64 x 16
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	5ms
Supply Voltage Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M93C46-MN6TP is determined by strict adherence to the following critical parameters:

Mandatory Compatibility Parameters:

Memory Size: 1Kbit (all substitutes must match)
Memory Format: EEPROM (all substitutes must match)
Memory Interface: Microwire (all substitutes must match)
Memory Organization: 128 x 8, 64 x 16 (all substitutes must match)
Package / Case: 8-SOIC (0.154", 3.90mm Width) (all substitutes must match)
Mounting Type: Surface Mount (all substitutes must match)

Allowable Variation Parameters:

Clock Frequency: 2 MHz or higher (3 MHz substitutes are acceptable)
Write Cycle Time: 5ms or faster (2ms or 6ms substitutes are acceptable based on application requirements)
Supply Voltage Range: Must encompass or exceed 4.5V ~ 5.5V minimum requirement
Operating Temperature: Must support -40°C minimum; 85°C or 125°C maximum both acceptable
Product Status: Active substitutes preferred over obsolete
Compliance: ROHS3 and REACH status maintained across all substitutes

Substitute parts are grouped into two categories: STMicroelectronics M93C46 series variants and Microchip Technology 93AA46/93C46C series alternatives. All substitutes maintain identical memory capacity, organization, and Microwire interface protocol.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Supply Voltage	Operating Temperature	Product Status	Package
M93C46-MN6TP	STMicroelectronics	1Kbit	2 MHz	5ms	4.5V ~ 5.5V	-40°C ~ 85°C	Obsolete	8-SOIC
M93C46-RMN3TP/K	STMicroelectronics	1Kbit	2 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 125°C	Active	8-SOIC
M93C46-WMN6TP	STMicroelectronics	1Kbit	2 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93AA46C-I/SN	Microchip Technology	1Kbit	3 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93AA46CT-I/SN	Microchip Technology	1Kbit	3 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93AA46CX-I/SN	Microchip Technology	1Kbit	3 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93AA46CXT-I/SN	Microchip Technology	1Kbit	3 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93AA46T-I/SN	Microchip Technology	1Kbit	2 MHz	10ms	1.8V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93C46C-E/SN	Microchip Technology	1Kbit	3 MHz	2ms	4.5V ~ 5.5V	-40°C ~ 125°C	Active	8-SOIC
93C46C-I/SN	Microchip Technology	1Kbit	3 MHz	2ms	4.5V ~ 5.5V	-40°C ~ 85°C	Active	8-SOIC
93C46CT-E/SN	Microchip Technology	1Kbit	3 MHz	2ms	4.5V ~ 5.5V	-40°C ~ 125°C	Active	8-SOIC

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The M93C46-RMN3TP/K and M93C46-WMN6TP are direct STMicroelectronics alternatives within the M93C46 base product family. Both maintain identical memory capacity, organization, Microwire interface, and 8-SOIC packaging. The M93C46-RMN3TP/K offers extended operating temperature range (-40°C to 125°C) and lower minimum supply voltage (1.8V), with automotive-grade AEC-Q100 qualification. The M93C46-WMN6TP provides verified programmability status and lower minimum supply voltage (2.5V). Both are active products with superior availability compared to the obsolete M93C46-MN6TP.

Secondary Substitutes (Microchip Technology 93AA46 Series):

The 93AA46C-I/SN, 93AA46CT-I/SN, and 93AA46CX-I/SN are Microchip Technology alternatives offering 3 MHz clock frequency (higher than the 2 MHz original specification) and extended supply voltage range (1.8V minimum). These parts maintain identical 1Kbit capacity, Microwire interface, and 8-SOIC packaging. Write cycle time is 6ms, which is acceptable for applications not requiring the 5ms specification of the original part. All are active products with established availability.

Tertiary Substitutes (Microchip Technology 93C46C Series):

The 93C46C-E/SN, 93C46C-I/SN, and 93C46CT-E/SN provide faster write cycle times (2ms) and 3 MHz clock frequency. The 93C46C-E/SN and 93C46CT-E/SN support extended operating temperature to 125°C. These parts maintain identical 1Kbit capacity, Microwire interface, and 8-SOIC packaging with supply voltage range of 4.5V to 5.5V matching the original specification.

Compliance Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original M93C46-MN6TP. Moisture sensitivity levels vary from MSL 1 (Unlimited) for most substitutes compared to MSL 3 (168 Hours) for the original part, representing improved handling characteristics.

Frequently Asked Questions (FAQ)

Q: Can the M93C46-RMN3TP/K directly replace the M93C46-MN6TP in existing designs?

A: The M93C46-RMN3TP/K is a direct functional replacement. Both devices share identical 1Kbit memory capacity, Microwire interface protocol, memory organization (128 x 8, 64 x 16), and 8-SOIC packaging. The M93C46-RMN3TP/K extends the supply voltage range to 1.8V minimum and operating temperature to 125°C maximum, providing enhanced flexibility. No circuit modifications are required for substitution.

Q: What is the difference between the M93C46-WMN6TP and M93C46-RMN3TP/K?

A: Both are active STMicroelectronics M93C46 variants with identical memory specifications and 8-SOIC packaging. The M93C46-RMN3TP/K includes automotive-grade AEC-Q100 qualification and supports -40°C to 125°C operating temperature with 1.8V minimum supply voltage. The M93C46-WMN6TP offers verified programmability status and operates from 2.5V minimum supply voltage with -40°C to 85°C temperature range. Selection depends on specific application requirements for temperature range and supply voltage constraints.

Q: Are Microchip Technology 93AA46 series parts compatible with the M93C46-MN6TP?

A: Microchip Technology 93AA46 series parts (93AA46C-I/SN, 93AA46CT-I/SN, 93AA46CX-I/SN, 93AA46T-I/SN) are functionally compatible. All maintain 1Kbit capacity, Microwire interface, and 8-SOIC packaging. The 93AA46 variants operate at 3 MHz clock frequency (compared to 2 MHz original) and support extended supply voltage range from 1.8V. Write cycle times range from 6ms to 10ms depending on specific part number. These substitutes are suitable for applications where the higher clock frequency and lower minimum supply voltage provide system benefits.

Q: What are the key differences between 93AA46 and 93C46C series from Microchip Technology?

A: The primary distinction is write cycle time. The 93AA46 series provides 6ms write cycle time (93AA46C variants) or 10ms (93AA46T), while the 93C46C series offers faster 2ms write cycle time. The 93C46C series maintains supply voltage range of 4.5V to 5.5V, matching the original M93C46-MN6TP specification. The 93AA46 series extends minimum supply voltage to 1.8V. Both series operate at 3 MHz clock frequency and maintain identical 1Kbit capacity and Microwire interface.

Q: Does packaging format (Tube, Cut Tape, Tape & Reel) affect electrical compatibility?

A: Packaging format (Tube, Cut Tape & Digi-Reel, or Tape & Reel) affects only component handling, storage, and assembly logistics. Electrical specifications, memory capacity, interface protocol, and performance characteristics remain identical regardless of packaging format. Selection of packaging format depends on production volume, assembly equipment compatibility, and inventory management requirements rather than electrical substitution criteria.

Q: Can the 93AA46T-I/SN with 10ms write cycle time replace the M93C46-MN6TP with 5ms write cycle time?

A: The 93AA46T-I/SN is electrically compatible and maintains identical 1Kbit capacity, Microwire interface, and 8-SOIC packaging. However, the 10ms write cycle time is twice the 5ms specification of the original part. This substitution is acceptable only for applications where write cycle time is not a critical performance parameter. Applications requiring the original 5ms write cycle time specification should select alternatives with matching or faster write cycle times, such as M93C46-RMN3TP/K, M93C46-WMN6TP, or 93C46C series parts.

Q: What is the significance of AEC-Q100 qualification on the M93C46-RMN3TP/K?

A: AEC-Q100 qualification indicates the M93C46-RMN3TP/K meets automotive industry reliability and quality standards established by the Automotive Electronics Council. This qualification is relevant for applications in automotive systems, industrial equipment, and other environments requiring enhanced reliability assurance. For non-automotive applications, AEC-Q100 qualification provides additional confidence in component quality but is not a mandatory substitution criterion.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance, consistent with the original M93C46-MN6TP. ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive, restricting lead and other hazardous materials. This compliance status is maintained across all STMicroelectronics M93C46 variants and Microchip Technology 93AA46 and 93C46C series alternatives.

Q: What is the practical difference between MSL 1 and MSL 3 moisture sensitivity levels?

A: Moisture Sensitivity Level (MSL) indicates component sensitivity to moisture absorption during storage and handling. MSL 3 (168 Hours) requires component use within 168 hours of package opening under specified humidity conditions. MSL 1 (Unlimited) indicates no time restriction after package opening. Most substitute parts feature MSL 1, providing extended shelf life and more flexible inventory management compared to the original M93C46-MN6TP with MSL 3. This represents an improvement in handling convenience for production environments.

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