Equivalent & Substitute Parts for 93AA56T/SN

Part Overview

The 93AA56T/SN is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol with 2 MHz clock frequency. This non-volatile memory device operates across a wide supply voltage range of 1.8V to 5.5V and is housed in an 8-SOIC surface mount package. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified when identical memory capacity, interface protocol, package form factor, and electrical operating parameters are maintained, or when enhanced performance characteristics provide functional compatibility within the same application space.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8, 128 x 16
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	10ms
Voltage Supply Range	1.8V ~ 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 eligibility for the 93AA56T/SN is determined by the following critical parameters: memory capacity (2Kbit), memory interface protocol (Microwire), package type (8-SOIC), and electrical compatibility within the specified voltage and temperature ranges. Substitute parts are grouped into three categories based on packaging format and performance characteristics:

Category 1: Direct Packaging Equivalent — Parts with identical memory specifications and Microwire interface but different packaging formats (Tube vs. Tape & Reel). These maintain full functional compatibility with potential variations in operating temperature range and write cycle performance.

Category 2: Enhanced Performance Substitutes — Parts with identical core memory specifications and Microwire interface but improved clock frequency (3 MHz) or reduced write cycle time (5-6ms vs. 10ms), offering superior performance within the same package footprint.

Category 3: Cross-Manufacturer Equivalents — STMicroelectronics M93C56 series parts with identical 2Kbit EEPROM capacity and Microwire interface, maintaining full electrical and mechanical compatibility while offering alternative sourcing and extended temperature or automotive-grade options.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Packaging	Product Status
93AA56T/SN	Microchip Technology	2Kbit	2 MHz	10ms	1.8V ~ 5.5V	-40°C ~ 85°C	Tape & Reel	Active
93AA56/SN	Microchip Technology	2Kbit	2 MHz	10ms	1.8V ~ 5.5V	0°C ~ 70°C	Tube	Active
93AA56CT-I/SN	Microchip Technology	2Kbit	3 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	Tape & Reel	Active
M93C56-RMN3TP/K	STMicroelectronics	2Kbit	2 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 125°C	Cut Tape & Digi-Reel	Active
M93C56-RMN6TP	STMicroelectronics	2Kbit	1 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	Tape & Reel	Active
M93C56-WMN6P	STMicroelectronics	2Kbit	2 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	Tube	Active
M93C56-WMN6TP	STMicroelectronics	2Kbit	2 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	Cut Tape & Digi-Reel	Active

Engineering Selection Recommendations

For direct replacement with identical performance characteristics: Select 93AA56/SN when Tube packaging is acceptable and operating temperature range of 0°C to 70°C meets application requirements. This part maintains full electrical and functional equivalence to the 93AA56T/SN.

For enhanced performance within Microchip product line: Select 93AA56CT-I/SN when improved clock frequency (3 MHz) and reduced write cycle time (6ms) provide system-level benefits. This part maintains the full operating temperature range (-40°C to 85°C) and supply voltage compatibility (1.8V to 5.5V) of the original specification.

For cross-manufacturer sourcing with extended temperature capability: Select M93C56-RMN3TP/K when automotive-grade qualification (AEC-Q100) and extended operating temperature range (-40°C to 125°C) are required. This STMicroelectronics part offers improved write cycle time (5ms) and maintains full voltage compatibility.

For high-volume applications with standard temperature range: Select M93C56-WMN6TP when large inventory availability and Cut Tape & Digi-Reel packaging are preferred. This part operates within -40°C to 85°C range with 2 MHz clock frequency and 5ms write cycle time, with the constraint that minimum supply voltage is 2.5V rather than 1.8V.

For cost-optimized sourcing with reduced clock frequency: Select M93C56-RMN6TP when 1 MHz clock frequency is acceptable for the application. This part provides the lowest clock speed among substitutes while maintaining 5ms write cycle time and full voltage range compatibility (1.8V to 5.5V).

All substitute parts maintain ROHS3 compliance and are currently in active production status.

Frequently Asked Questions (FAQ)

Q: Can 93AA56/SN be used as a direct replacement for 93AA56T/SN?

A: Yes, with temperature range consideration. Both parts are identical 2Kbit Microwire EEPROM devices in 8-SOIC packages with 2 MHz clock frequency. The primary difference is packaging format (Tube vs. Tape & Reel) and operating temperature range. The 93AA56/SN operates from 0°C to 70°C, while the 93AA56T/SN operates from -40°C to 85°C. Substitution is valid only when the application temperature range does not exceed 0°C to 70°C.

Q: What is the advantage of 93AA56CT-I/SN over the original 93AA56T/SN?

A: The 93AA56CT-I/SN offers improved performance with 3 MHz clock frequency (versus 2 MHz) and reduced write cycle time of 6ms (versus 10ms). Both parts maintain identical 2Kbit capacity, Microwire interface, 8-SOIC package, and full operating temperature range of -40°C to 85°C. The enhanced clock frequency and faster write cycles provide system-level performance benefits without requiring design changes.

Q: Are STMicroelectronics M93C56 parts fully compatible with Microchip 93AA56 devices?

A: Yes. All M93C56 substitute parts maintain identical 2Kbit EEPROM capacity, Microwire serial interface protocol, and 8-SOIC package form factor. Electrical parameters including supply voltage range, operating temperature range, and memory organization are compatible. The primary differences are manufacturer-specific part numbering, write cycle time performance (5ms vs. 10ms), and in some cases, extended temperature or automotive qualification.

Q: What is the significance of the voltage supply range difference in M93C56-WMN6P and M93C56-WMN6TP?

A: These STMicroelectronics parts specify a minimum supply voltage of 2.5V, compared to 1.8V for the original 93AA56T/SN and most other substitutes. This means these parts cannot be used in applications requiring operation below 2.5V supply voltage. Substitution is valid only when the application minimum supply voltage is 2.5V or higher.

Q: Which substitute part offers the best overall compatibility for general replacement?

A: M93C56-WMN6TP provides optimal compatibility for most applications. It maintains 2 MHz clock frequency matching the original specification, offers improved 5ms write cycle time, operates across -40°C to 85°C temperature range, and is ROHS3 compliant with active production status. The only constraint is the 2.5V minimum supply voltage requirement.

Q: Can M93C56-RMN3TP/K be used in non-automotive applications?

A: Yes. The AEC-Q100 automotive qualification and extended temperature range (-40°C to 125°C) of M93C56-RMN3TP/K represent enhanced specifications that are fully backward compatible with standard industrial applications. This part is suitable for any application requiring 2Kbit Microwire EEPROM functionality within the specified electrical parameters.

Q: What packaging format should be selected for high-volume production?

A: Tape & Reel (TR) and Cut Tape & Digi-Reel packaging formats are optimized for automated assembly processes. For the 93AA56T/SN, equivalent Tape & Reel options include 93AA56CT-I/SN, M93C56-RMN6TP, and M93C56-WMN6TP. Tube packaging (93AA56/SN, M93C56-WMN6P) is suitable for manual assembly or lower-volume applications.

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