93C56CT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C56CT-E/SN is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This non-volatile memory device operates at 3 MHz clock frequency with a 2ms write cycle time and supports supply voltages from 4.5V to 5.5V across an operating temperature range of -40°C to 125°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements permit operation at alternative clock frequencies or voltage specifications.

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	3 MHz
Write Cycle Time	2ms
Voltage Supply Range	4.5V ~ 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 of the 93C56CT-E/SN is determined by strict compatibility across the following parameters: memory size (2Kbit), memory organization (256 x 8, 128 x 16), Microwire serial interface protocol, 8-SOIC package configuration, surface mount mounting type, and ROHS3 compliance. All substitute parts listed maintain these core specifications. Variations in clock frequency (1 MHz to 3 MHz), write cycle time (2ms to 5ms), supply voltage range (1.8V to 5.5V), and operating temperature range (-40°C to 125°C) are permitted within the substitute group, provided the application requirements do not mandate the original part's specific performance characteristics. Packaging format variations (Tape & Reel, Cut Tape, Tube) do not affect functional compatibility but may impact procurement and assembly workflows.

Parameter Comparison

Parameter	93C56CT-E/SN (Microchip)	M93C56-RMN3TP/K (STMicroelectronics)	M93C56-RMN6TP (STMicroelectronics)	M93C56-WMN6P (STMicroelectronics)	M93C56-WMN6TP (STMicroelectronics)
Memory Size	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
Memory Interface	Microwire	Microwire	Microwire	Microwire	Microwire
Clock Frequency	3 MHz	2 MHz	1 MHz	2 MHz	2 MHz
Write Cycle Time	2ms	5ms	5ms	5ms	5ms
Voltage Supply Range	4.5V ~ 5.5V	1.8V ~ 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 ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tube	Cut Tape (CT) & Digi-Reel®
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts maintain active production status and ROHS3 compliance, ensuring regulatory alignment with the original 93C56CT-E/SN specification. The M93C56-RMN3TP/K variant from STMicroelectronics carries AEC-Q100 automotive qualification and supports the full -40°C to 125°C operating temperature range of the original part, making it suitable for applications requiring extended temperature performance. The M93C56-RMN6TP, M93C56-WMN6P, and M93C56-WMN6TP variants operate within the -40°C to 85°C temperature range and are suitable for commercial and industrial applications not requiring the extended upper temperature limit. Selection between STMicroelectronics variants should prioritize clock frequency and write cycle time requirements: the M93C56-RMN6TP operates at 1 MHz with 5ms write cycle time, while M93C56-WMN6P and M93C56-WMN6TP both operate at 2 MHz with 5ms write cycle time. Packaging format selection (Tape & Reel, Cut Tape, or Tube) should align with assembly line requirements and procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can M93C56-RMN6TP substitute for 93C56CT-E/SN in all applications?

A: M93C56-RMN6TP is functionally compatible for applications where 1 MHz clock frequency and 5ms write cycle time meet performance requirements. Applications requiring the original 3 MHz clock frequency or 2ms write cycle time must verify timing compatibility before substitution.

Q: What is the difference between M93C56-WMN6P and M93C56-WMN6TP?

A: Both parts are electrically identical with 2 MHz clock frequency and 5ms write cycle time. The primary difference is packaging format: M93C56-WMN6P is supplied in Tube format, while M93C56-WMN6TP is supplied in Cut Tape & Digi-Reel® format. Selection depends on assembly line equipment compatibility.

Q: Does M93C56-RMN3TP/K support the full temperature range of the original part?

A: Yes, M93C56-RMN3TP/K operates across -40°C to 125°C, matching the original 93C56CT-E/SN temperature specification. This variant also carries AEC-Q100 automotive qualification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance, ensuring regulatory alignment with the original 93C56CT-E/SN specification.

Q: What supply voltage range is supported by the substitute parts?

A: M93C56-RMN3TP/K and M93C56-RMN6TP support 1.8V to 5.5V. M93C56-WMN6P and M93C56-WMN6TP support 2.5V to 5.5V. The original 93C56CT-E/SN requires 4.5V to 5.5V. Verify application voltage requirements before substitution.

Q: Can substitute parts be used interchangeably in existing designs?

A: Substitute parts maintain identical Microwire interface protocol, 8-SOIC package configuration, and memory organization. Interchangeability depends on application tolerance for variations in clock frequency, write cycle time, operating temperature range, and supply voltage range. Verify design specifications before implementation.

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