93C76A-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C76A-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 component operates at 3 MHz clock frequency with a 1K x 8 memory organization and is housed in an 8-SOIC surface mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent memory capacity, interface protocol, and package form factor requirements must be met while accommodating variations in operating voltage ranges, temperature specifications, and write cycle timing.

Substiute Parts

93C76A-E/SN

Microchip TechnologyIn Stock: 74393C76A-E/SN Datasheet

Current PartRFQ

93LC76A-I/SN

Microchip TechnologyIn Stock: 81893LC76A-I/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93C76A-E/SN is determined by strict equivalence in the following core parameters: 8Kbit memory capacity, 1K x 8 organization, Microwire serial interface protocol, 3 MHz clock frequency, and 8-SOIC surface mount package. Variations in supply voltage range, operating temperature range, and write cycle time are permissible within the constraints of the target application circuit design. The substitute part 93LC76A-I/SN maintains all core functional parameters while introducing extended voltage compatibility (2.5V ~ 5.5V versus 4.5V ~ 5.5V) and modified write cycle timing (5ms versus 2ms). These variations do not affect core memory functionality or interface protocol compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the 93C76A-E/SN and 93LC76A-I/SN maintain Active product status with equivalent RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring long-term component availability and environmental regulatory adherence. Selection between these parts depends on application-specific requirements: the 93C76A-E/SN is suitable for systems requiring extended operating temperature range up to 125°C and faster write cycle performance (2ms). The 93LC76A-I/SN accommodates lower supply voltage operation (2.5V minimum) and is appropriate for battery-powered or low-voltage applications where extended write cycle time (5ms) is acceptable. Both components are verified for programmability and maintain identical memory capacity, interface protocol, and package specifications.

Frequently Asked Questions (FAQ)

Q: Can the 93LC76A-I/SN replace the 93C76A-E/SN in all applications?

A: Substitution is valid when the target application operates within the 93LC76A-I/SN voltage range (2.5V ~ 5.5V) and temperature range (-40°C ~ 85°C), and when the extended write cycle time (5ms) does not conflict with system timing requirements. Applications requiring operation above 85°C or demanding 2ms write cycle performance require the original 93C76A-E/SN specification.

Q: Are there package compatibility concerns between these parts?

A: Both parts use identical 8-SOIC surface mount packaging (0.154", 3.90mm width). PCB footprints, solder reflow profiles, and mechanical mounting requirements are equivalent. No package-related design modifications are necessary.

Q: What is the significance of the voltage range difference?

A: The 93LC76A-I/SN supports operation down to 2.5V supply voltage, compared to 4.5V minimum for the 93C76A-E/SN. This extended lower voltage range enables use in low-power applications. However, both parts operate identically within the overlapping 4.5V ~ 5.5V range.

Q: How does write cycle time affect system design?

A: Write cycle time specifies the duration required to complete a single word or page write operation. The 93C76A-E/SN requires 2ms per write cycle, while the 93LC76A-I/SN requires 5ms. Applications with strict write timing constraints must account for these differences in firmware or system timing calculations.

Q: Are both parts suitable for new designs?

A: Both components maintain Active product status. Selection should be based on specific application voltage, temperature, and write cycle requirements rather than availability considerations.