AT93C56-10SC-2.5 Equivalent & Substitute Parts

Part Overview

The AT93C56-10SC-2.5 is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring 3-Wire Serial interface with 2 MHz clock frequency in 8-SOIC surface mount packaging. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The 256 x 8 / 128 x 16 memory organization and 2.5V to 5.5V supply voltage range define its operational scope. Equivalent parts must maintain core memory specifications while accommodating interface protocol variations and enhanced compliance standards.

Key Parameters

Parameter	AT93C56-10SC-2.5
Memory Size	2Kbit
Memory Organization	256 x 8, 128 x 16
Memory Interface	3-Wire Serial
Clock Frequency	2 MHz
Write Cycle Time	10ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the AT93C56-10SC-2.5 is determined by the following critical parameters:

Core Memory Specifications: All substitute parts maintain 2Kbit capacity with 256 x 8 / 128 x 16 organization, ensuring functional equivalence at the memory level.

Package Compatibility: All substitutes use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, enabling direct PCB footprint compatibility.

Interface Protocol: The AT93C56-10SC-2.5 uses 3-Wire Serial interface. Substitute parts employ Microwire protocol, which is functionally compatible for this memory category while offering enhanced specifications.

Electrical Parameters: Substitute parts support voltage ranges that encompass or exceed the original 2.5V ~ 5.5V specification, with write cycle times of 5ms (improved from 10ms).

Compliance & Status: Substitute parts are active products with RoHS3 compliance, addressing the obsolescence and regulatory limitations of the original part.

Parameter Comparison

Parameter	AT93C56-10SC-2.5	93AA56/SN	M93C56-RMN3TP/K	M93C56-RMN6TP	M93C56-WMN6P	M93C56-WMN6TP
Manufacturer	Microchip Technology	Microchip Technology	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit	2Kbit
Memory Organization	256 x 8, 128 x 16	256 x 8, 128 x 16	256 x 8, 128 x 16	256 x 8, 128 x 16	256 x 8, 128 x 16	256 x 8, 128 x 16
Memory Interface	3-Wire Serial	Microwire	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz	1 MHz	2 MHz	2 MHz
Write Cycle Time	10ms	10ms	5ms	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Standard Industrial Applications (0°C ~ 70°C): 93AA56/SN from Microchip Technology provides direct functional substitution with active product status and RoHS3 compliance. This part maintains the original operating temperature range while offering improved write cycle time (10ms) and extended voltage support (1.8V ~ 5.5V).

For Extended Temperature Range Applications (-40°C ~ 85°C): M93C56-RMN6TP or M93C56-WMN6TP from STMicroelectronics are suitable for designs requiring broader temperature operation. Both parts deliver 2 MHz clock frequency, 5ms write cycle time, and RoHS3 compliance. M93C56-WMN6TP is available in higher inventory volume.

For Automotive-Grade Applications (-40°C ~ 125°C): M93C56-RMN3TP/K from STMicroelectronics is qualified to AEC-Q100 automotive standards with extended temperature range to 125°C. This part is specified for automotive-grade designs requiring enhanced reliability certification.

For Voltage-Constrained Designs (1.8V minimum): 93AA56/SN, M93C56-RMN3TP/K, and M93C56-RMN6TP support 1.8V minimum supply voltage, enabling low-power applications. M93C56-WMN6P and M93C56-WMN6TP require minimum 2.5V supply.

All substitute parts are active products with RoHS3 compliance, addressing the obsolescence status of the original AT93C56-10SC-2.5.

Frequently Asked Questions (FAQ)

Q: Can the AT93C56-10SC-2.5 be directly replaced with 93AA56/SN? A: Yes. Both parts share identical 2Kbit memory capacity, 256 x 8 / 128 x 16 organization, 8-SOIC packaging, and 2 MHz clock frequency. The 93AA56/SN uses Microwire protocol instead of 3-Wire Serial, but maintains functional compatibility for this memory category. The 93AA56/SN is an active product with RoHS3 compliance.

Q: What is the difference between 3-Wire Serial and Microwire interfaces? A: Both are serial communication protocols for EEPROM memory. Microwire is the industry-standard protocol for this memory class and is functionally compatible with 3-Wire Serial implementations in equivalent memory devices. All substitute parts use Microwire protocol.

Q: Are all substitute parts available in the same 8-SOIC package? A: Yes. All substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB footprint compatibility with the original AT93C56-10SC-2.5.

Q: Which substitute part has the fastest write cycle time? A: All STMicroelectronics substitutes (M93C56 series) offer 5ms write cycle time, compared to 10ms for the original part and 93AA56/SN. This represents a 50% improvement in write performance.

Q: What is the temperature range difference between substitutes? A: 93AA56/SN maintains the original 0°C ~ 70°C range. M93C56-RMN6TP and M93C56-WMN6P extend to -40°C ~ 85°C. M93C56-RMN3TP/K provides the widest range at -40°C ~ 125°C with automotive qualification.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts are ROHS3 compliant, addressing the RoHS non-compliant status of the obsolete AT93C56-10SC-2.5.

Q: Which substitute has the highest inventory availability? A: M93C56-WMN6P has the highest inventory at 5,000,300 pieces. M93C56-RMN6TP has 25,200 pieces. M93C56-WMN6TP has 41,080 pieces.

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