93LC76BT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC76BT-E/SN is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring Microwire serial interface communication. This device operates across a wide supply voltage range of 2.5V to 5.5V and supports operating temperatures from -40°C to 125°C, making it suitable for industrial and extended-temperature applications. The part is currently in active production status with 629 units available in stock. Equivalent and substitute parts are identified based on matching memory capacity, organization, interface protocol, and package compatibility to ensure functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	8Kbit
Memory Organization	512 x 16
Memory Interface	Microwire
Clock Frequency	3 MHz
Write Cycle Time	5ms
Supply Voltage 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

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC76BT-E/SN is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must provide 8Kbit capacity with 512 x 16 organization to maintain data structure compatibility
Serial Interface Protocol: Microwire interface compatibility is mandatory for direct pin-level and protocol compatibility
Package Footprint: 8-SOIC package with 0.154" (3.90mm) width ensures PCB layout compatibility
Supply Voltage Range: Substitute parts must operate within or encompass the 2.5V ~ 5.5V range
Write Cycle Time: 5ms write cycle time specification must be met or exceeded
Environmental Rating: Operating temperature range and compliance certifications (RoHS3, REACH) must be maintained

The BR93L76RFJ-WE2 manufactured by Rohm Semiconductor meets these substitution criteria with compatible memory specifications, Microwire interface, and equivalent package dimensions.

Parameter Comparison

Parameter	93LC76BT-E/SN (Microchip)	BR93L76RFJ-WE2 (Rohm)	Compatibility
Memory Size	8Kbit	8Kbit	Match
Memory Organization	512 x 16	512 x 16	Match
Memory Interface	Microwire	Microwire	Match
Clock Frequency	3 MHz	2 MHz	Compatible (lower frequency acceptable)
Write Cycle Time	5ms	5ms	Match
Supply Voltage Range	2.5V ~ 5.5V	1.8V ~ 5.5V	Compatible (wider range)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	Partial (reduced upper limit)
Package Type	8-SOIC	8-SOP-J	Compatible (equivalent footprint)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match

Engineering Selection Recommendations

Primary Consideration - Operating Temperature Range: The 93LC76BT-E/SN supports extended operating temperatures up to 125°C, while the BR93L76RFJ-WE2 substitute is rated to 85°C maximum. Selection of the substitute part is appropriate only for applications where the maximum ambient or junction temperature does not exceed 85°C.

Clock Frequency Derating: The BR93L76RFJ-WE2 operates at 2 MHz versus the primary part's 3 MHz specification. This lower frequency is functionally compatible and does not impact data integrity; however, serial communication timing in the host circuit must accommodate the reduced clock speed.

Supply Voltage Advantage: The BR93L76RFJ-WE2 extends the lower supply voltage limit to 1.8V, providing broader compatibility with low-power and battery-operated applications compared to the 2.5V minimum of the primary part.

Compliance & Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in equivalent applications.

Production Status & Availability: Both parts are in active production. The BR93L76RFJ-WE2 shows significantly higher inventory availability (16,210 units) compared to the primary part (629 units), which may influence supply chain decisions.

Frequently Asked Questions (FAQ)

Q: Can the BR93L76RFJ-WE2 be used as a direct pin-for-pin replacement for the 93LC76BT-E/SN?

A: Yes, both parts use the 8-SOIC package with identical 0.154" (3.90mm) width and are pin-compatible for Microwire interface connections. However, verify that your application's maximum operating temperature does not exceed 85°C, as this is the upper limit for the Rohm substitute.

Q: What is the impact of the 2 MHz clock frequency on the BR93L76RFJ-WE2 compared to the 3 MHz primary part?

A: The lower clock frequency does not affect data storage or retrieval accuracy. Serial communication will operate at a proportionally reduced speed. Ensure your host microcontroller or interface circuit can accommodate the 2 MHz timing without protocol violations.

Q: Are there any differences in the package designation between 8-SOIC and 8-SOP-J?

A: Both designations refer to equivalent 8-pin small-outline packages with identical footprints and pin spacing. The different naming conventions reflect manufacturer nomenclature but do not indicate physical or electrical differences relevant to PCB assembly.

Q: Which part should I select for high-temperature industrial applications?

A: The 93LC76BT-E/SN is the appropriate choice for applications requiring operation above 85°C, as it is rated to 125°C. The BR93L76RFJ-WE2 is limited to 85°C maximum and should not be used in higher-temperature environments.

Q: Does the extended supply voltage range of the BR93L76RFJ-WE2 (1.8V minimum) provide any practical advantage?

A: Yes, if your application operates at supply voltages below 2.5V, the BR93L76RFJ-WE2 is the only viable option between these two parts. This is particularly relevant for battery-powered or ultra-low-power designs.

Q: Are both parts RoHS3 compliant?

A: Yes, both the 93LC76BT-E/SN and BR93L76RFJ-WE2 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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