93AA46-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93AA46-I/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 wide supply voltage range of 1.8V to 5.5V and supports industrial temperature specifications from -40°C to 85°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent memory capacity, interface protocol, packaging format, and electrical specifications align with application requirements.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Organization	128 x 8, 64 x 16
Memory Interface	Microwire
Clock Frequency	2 MHz
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Write Cycle Time	10ms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 93AA46-I/SN is determined by strict alignment across the following critical parameters: memory capacity (1Kbit), memory organization (128 x 8 or 64 x 16 bit configuration), Microwire serial interface protocol, 8-SOIC package format, and surface mount mounting type. All identified substitute parts maintain these core specifications. Secondary parameters including clock frequency, write cycle time, supply voltage range, and operating temperature range may vary within acceptable tolerances for equivalent functionality. Substitute parts are grouped by manufacturer and packaging configuration while preserving functional interchangeability within the specified electrical and thermal operating envelope.

Parameter Comparison

Parameter	93AA46-I/SN	93AA46C-I/SN	M93C46-RMN3TP/K	M93C46-WMN6P	M93C46-WMN6TP
Manufacturer	Microchip Technology	Microchip Technology	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	128 x 8, 64 x 16	128 x 8, 64 x 16	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
Clock Frequency	2 MHz	3 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	10ms	6ms	5ms	5ms	5ms
Voltage Supply Range	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°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
Packaging Format	Tube	Tube	Cut Tape & Digi-Reel	Tube	Cut Tape & Digi-Reel
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain active production status and ROHS3 compliance equivalent to the 93AA46-I/SN. The 93AA46C-I/SN offers increased clock frequency (3 MHz) and reduced write cycle time (6ms) while preserving the full 1.8V to 5.5V supply voltage range. The M93C46-RMN3TP/K from STMicroelectronics extends the operating temperature range to -40°C to 125°C and includes AEC-Q100 automotive qualification, suitable for extended thermal environments. The M93C46-WMN6TP variant provides verified programmability status with high inventory availability (61,180 units) and maintains 2 MHz clock frequency with 5ms write cycle time. The M93C46-WMN6P offers identical electrical specifications to M93C46-WMN6TP with tube packaging format. Selection between Microchip and STMicroelectronics variants depends on supply voltage floor requirements (1.8V minimum for Microchip variants versus 2.5V minimum for M93C46-WMN6 series) and thermal operating envelope specifications.

Frequently Asked Questions (FAQ)

Q: Can the 93AA46C-I/SN directly replace the 93AA46-I/SN? A: Yes. Both parts share identical memory capacity (1Kbit), organization (128 x 8, 64 x 16), Microwire interface, 8-SOIC packaging, and supply voltage range (1.8V to 5.5V). The 93AA46C-I/SN operates at 3 MHz clock frequency versus 2 MHz for the original part, with correspondingly faster write cycle time (6ms versus 10ms), providing functional equivalence with improved performance characteristics.

Q: What is the key difference between Microchip and STMicroelectronics variants? A: Microchip 93AA46 series supports 1.8V minimum supply voltage, while STMicroelectronics M93C46-WMN6 variants require 2.5V minimum. The M93C46-RMN3TP/K extends operating temperature to 125°C and includes automotive AEC-Q100 qualification. All variants maintain 1Kbit capacity and Microwire interface protocol.

Q: Are packaging format differences (Tube versus Cut Tape & Digi-Reel) functionally significant? A: No. Packaging format differences reflect distribution and handling methods only. Tube and Cut Tape & Digi-Reel formats contain electrically and functionally identical components. Selection depends on assembly process requirements and procurement volume specifications.

Q: Which substitute part offers the fastest write cycle time? A: The M93C46-RMN3TP/K, M93C46-WMN6P, and M93C46-WMN6TP all provide 5ms write cycle time, compared to 10ms for the original 93AA46-I/SN and 6ms for the 93AA46C-I/SN variant.

Q: Is the M93C46-RMN3TP/K suitable for automotive applications? A: Yes. The M93C46-RMN3TP/K carries AEC-Q100 automotive qualification and extends the operating temperature range to -40°C to 125°C, meeting automotive-grade specifications.

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