93LC56CT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56CT-E/SN is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This device operates across a 2.5V to 5.5V supply voltage range with a 3 MHz clock frequency and is actively supported with ROHS3 compliance. Substitute parts are necessary when addressing packaging format requirements, extended voltage specifications, automotive qualification needs, or inventory availability constraints while maintaining functional equivalence in 2Kbit EEPROM Microwire applications.

Key Parameters

Parameter	Specification
Memory Size	2Kbit
Memory Format	EEPROM
Memory Organization	256 x 8, 128 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
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC56CT-E/SN is determined by strict equivalence across the following critical parameters: 2Kbit memory capacity, EEPROM non-volatile technology, Microwire serial interface protocol, 256 x 8 or 128 x 16 memory organization, and 8-SOIC package form factor. All substitute parts listed maintain these core functional specifications. Variations in clock frequency (1 MHz to 3 MHz), write cycle time (5ms to 6ms), supply voltage range (1.8V to 5.5V), and operating temperature range (-40°C to 125°C) are permitted within the substitution set, as these parameters represent performance enhancements or extended operational boundaries rather than functional incompatibilities. Packaging format differences (Tape & Reel, Tube, Cut Tape & Digi-Reel) are accommodated based on procurement and assembly requirements. Automotive qualification and DiGi-Electronics programmability verification status are noted for applications requiring these certifications but do not restrict substitution eligibility for general-purpose applications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Write Cycle Time	Voltage Supply	Operating Temperature	Package	Packaging Format
93LC56CT-E/SN	Microchip Technology	2Kbit	3 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Tape & Reel
93LC56C-E/SN	Microchip Technology	2Kbit	3 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Tube
M93C56-RMN3TP/K	STMicroelectronics	2Kbit	2 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Cut Tape & Digi-Reel
M93C56-RMN6TP	STMicroelectronics	2Kbit	1 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tape & Reel
M93C56-WMN6P	STMicroelectronics	2Kbit	2 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tube
M93C56-WMN6TP	STMicroelectronics	2Kbit	2 MHz	5ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Selection among substitute parts should be based on specific application requirements and operational constraints:

93LC56C-E/SN (Microchip Technology) provides direct functional equivalence to the primary part with identical electrical specifications and operating range. This substitute is appropriate when Microchip sourcing is preferred or when Tube packaging format is required for assembly processes.

M93C56-RMN3TP/K (STMicroelectronics) offers automotive-grade qualification under AEC-Q100 standard with extended lower voltage support (1.8V minimum). This part is suitable for automotive applications, industrial environments requiring enhanced reliability certification, and systems operating at reduced supply voltages. DiGi-Electronics programmability verification is confirmed.

M93C56-RMN6TP (STMicroelectronics) provides the lowest clock frequency (1 MHz) and reduced operating temperature ceiling (-40°C to 85°C). This part is appropriate for low-speed serial communication applications and standard commercial temperature range requirements. Tape & Reel packaging supports high-volume automated assembly.

M93C56-WMN6P (STMicroelectronics) maintains 2.5V to 5.5V voltage compatibility with the primary part while offering Tube packaging. This substitute accommodates procurement scenarios requiring STMicroelectronics sourcing with standard commercial temperature range (-40°C to 85°C).

M93C56-WMN6TP (STMicroelectronics) combines 2.5V to 5.5V voltage specification with Cut Tape & Digi-Reel packaging format and verified DiGi-Electronics programmability. This part is optimal for high-volume production requiring automated tape feeding and STMicroelectronics supply chain integration.

Frequently Asked Questions (FAQ)

Q: Can the 93LC56CT-E/SN be directly replaced with 93LC56C-E/SN?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications, memory capacity, interface protocol, and operating range. The only difference is packaging format: 93LC56CT-E/SN is supplied in Tape & Reel format while 93LC56C-E/SN is supplied in Tube format. Functional compatibility is complete.

Q: What is the primary difference between Microchip and STMicroelectronics substitute options?

A: Microchip parts (93LC56C-E/SN) maintain the original 3 MHz clock frequency and 6ms write cycle time. STMicroelectronics parts (M93C56 series) operate at reduced clock frequencies (1-2 MHz) with faster write cycles (5ms), extended lower voltage support (1.8V minimum on select models), and automotive qualification available on M93C56-RMN3TP/K. Both manufacturers provide ROHS3 compliance and identical 2Kbit EEPROM Microwire functionality.

Q: Is the M93C56-RMN3TP/K suitable for automotive applications?

A: Yes. The M93C56-RMN3TP/K carries AEC-Q100 automotive qualification and is designated as automotive-grade. This part meets automotive reliability and testing standards and is appropriate for vehicle electronics and industrial applications requiring enhanced qualification documentation.

Q: What packaging formats are available among substitute parts?

A: Substitute parts are available in three packaging formats: Tape & Reel (93LC56CT-E/SN, M93C56-RMN6TP), Tube (93LC56C-E/SN, M93C56-WMN6P), and Cut Tape & Digi-Reel (M93C56-RMN3TP/K, M93C56-WMN6TP). Selection depends on assembly equipment compatibility and procurement workflow requirements.

Q: Can I use M93C56-RMN6TP in applications requiring -40°C to 125°C temperature range?

A: No. The M93C56-RMN6TP operates only to 85°C maximum. For applications requiring the full -40°C to 125°C range, use 93LC56CT-E/SN, 93LC56C-E/SN, or M93C56-RMN3TP/K.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this substitution set maintain ROHS3 compliance status and are suitable for applications requiring RoHS directive adherence.

Q: What is the significance of DiGi-Electronics programmability verification?

A: DiGi-Electronics programmability verification indicates that the part has been tested and confirmed compatible with DiGi-Electronics programming equipment and processes. Parts marked as "Verified" (M93C56-RMN3TP/K, M93C56-WMN6TP) are confirmed for this compatibility. Parts marked as "Not Verified" may still be programmable but have not undergone this specific verification process.

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