93LC46C-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46C-E/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This non-volatile memory device operates across a 2.5V to 5.5V supply voltage range with a 3 MHz clock frequency and is classified as an active product with ROHS3 compliance. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, different packaging formats, extended temperature ranges, or automotive-grade qualification.

Key Parameters

Parameter	Specification
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8, 64 x 16
Memory Interface	Microwire
Clock Frequency	3 MHz
Write Cycle Time	6ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC46C-E/SN is determined by the following critical parameters: memory size (1Kbit), memory format (EEPROM), interface protocol (Microwire), package type (8-SOIC), and supply voltage compatibility (2.5V ~ 5.5V minimum overlap). Clock frequency variations between 2 MHz and 3 MHz are acceptable within the Microwire protocol specification. Write cycle time differences (5ms vs 6ms) do not preclude substitution. Operating temperature range, packaging format (Tape & Reel, Cut Tape, Tube), and automotive qualification are secondary selection criteria that depend on application requirements rather than functional compatibility.

Parameter Comparison

Parameter	93LC46C-E/SN (Main)	93LC46CT-E/SN	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	Microwire	Microwire	Microwire	Microwire	Microwire	Microwire
Clock Frequency	3 MHz	3 MHz	2 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	6ms	6ms	Not Specified	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°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
Packaging Format	Standard	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®
Automotive Grade	No	No	Yes (AEC-Q100)	Yes (AEC-Q100)	No	No
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

93LC46CT-E/SN serves as a direct functional equivalent with identical electrical specifications and full temperature range support (-40°C ~ 125°C). Selection is appropriate when Tape & Reel packaging format is required for automated assembly processes.

CAV93C46VE-GT3 (onsemi) is suitable for applications requiring automotive-grade qualification (AEC-Q100) with full temperature range operation. Clock frequency is reduced to 2 MHz, which remains compatible with Microwire protocol requirements. This part is recommended for automotive and industrial applications subject to AEC-Q100 standards.

M93C46-RMN3TP/K (STMicroelectronics) provides automotive-grade qualification (AEC-Q100) with extended supply voltage range (1.8V ~ 5.5V) and full temperature range (-40°C ~ 125°C). Cut Tape & Digi-Reel® packaging supports both manual and automated assembly. This part is optimal for automotive applications requiring lower voltage operation capability.

M93C46-WMN6P (STMicroelectronics) is available in Tube packaging format with standard industrial temperature range (-40°C ~ 85°C). Selection is appropriate for non-automotive applications where Tube packaging is preferred and reduced temperature range is acceptable.

M93C46-WMN6TP (STMicroelectronics) offers the highest inventory availability (61,180 pcs) with verified DiGi-Electronics programmability. Cut Tape & Digi-Reel® packaging supports automated assembly. Operating temperature range is -40°C ~ 85°C. This part is recommended as the primary substitute when industrial-grade operation and high availability are priorities.

Frequently Asked Questions (FAQ)

Q: Can the 93LC46C-E/SN be directly replaced with M93C46-WMN6TP?

A: Yes. Both devices share identical 1Kbit EEPROM memory size, Microwire interface, 8-SOIC package, and overlapping supply voltage range (2.5V ~ 5.5V). The M93C46-WMN6TP operates at 2 MHz clock frequency versus 3 MHz for the 93LC46C-E/SN, which is compatible with Microwire protocol specifications. The primary difference is operating temperature range: M93C46-WMN6TP supports -40°C ~ 85°C versus -40°C ~ 125°C for the original part. Substitution is valid for applications within the -40°C ~ 85°C range.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® are both reel-based packaging formats optimized for automated pick-and-place assembly. Tape & Reel uses continuous tape, while Cut Tape & Digi-Reel® provides pre-cut segments on a reel. Both formats are suitable for high-volume manufacturing. Selection depends on assembly equipment compatibility and procurement preferences.

Q: Why does CAV93C46VE-GT3 have a lower clock frequency (2 MHz vs 3 MHz)?

A: Clock frequency variation does not affect functional compatibility. The Microwire protocol operates across a range of clock frequencies. The 2 MHz specification for CAV93C46VE-GT3 is a design characteristic of the onsemi implementation and remains fully compatible with systems designed for 3 MHz operation, as the interface protocol is backward compatible across this frequency range.

Q: Is automotive qualification (AEC-Q100) necessary for my application?

A: Automotive qualification is required only for applications subject to automotive industry standards or deployed in automotive environments. CAV93C46VE-GT3 and M93C46-RMN3TP/K carry AEC-Q100 qualification. For non-automotive industrial or consumer applications, standard-grade parts (93LC46CT-E/SN, M93C46-WMN6P, M93C46-WMN6TP) are appropriate.

Q: What is the significance of the extended supply voltage range (1.8V ~ 5.5V) in M93C46-RMN3TP/K?

A: The M93C46-RMN3TP/K supports operation down to 1.8V, compared to 2.5V minimum for most other variants. This extended range is beneficial for battery-powered or low-voltage applications. If your system operates above 2.5V, this advantage is not applicable. Substitution remains valid for standard 2.5V ~ 5.5V applications.

Q: Can I use M93C46-WMN6P (Tube packaging) in automated assembly?

A: Tube packaging is designed for manual handling and lower-volume assembly processes. For high-volume automated assembly, Tape & Reel (93LC46CT-E/SN) or Cut Tape & Digi-Reel® (M93C46-RMN3TP/K, M93C46-WMN6TP) formats are recommended. Tube packaging substitution is appropriate only for manual assembly or low-volume production environments.

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