93LC56A-I/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56A-I/P is a 2Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring Microwire serial interface communication. This device operates across a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 2 MHz, making it suitable for embedded systems and microcontroller-based applications requiring persistent memory storage.

The 93LC56A-I/P maintains Active product status with verified programmability through DiGi-Electronics. Alternative part numbers exist within the Microchip EEPROM product line to accommodate different voltage requirements and application specifications while maintaining functional equivalence in memory capacity, organization, and interface protocol.

Substiute Parts

93LC56A-I/P

Microchip TechnologyIn Stock: 187793LC56A-I/P Datasheet

Current PartRFQ

93AA56A-I/P

Microchip TechnologyIn Stock: 124793AA56A-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC56A-I/P is determined by strict equivalence across the following critical parameters:

Memory Capacity & Organization: Both the main part and substitute must provide identical 2Kbit capacity with 256 x 8 organization to ensure software compatibility and data structure alignment.

Serial Interface Protocol: The Microwire interface specification must be maintained across all substitute parts to ensure protocol-level compatibility with existing circuit designs and firmware implementations.

Package & Mounting: The 8-DIP through-hole package format must remain consistent to ensure mechanical fit within existing PCB layouts and socket configurations.

Operating Temperature Range: The -40°C to 85°C operating specification must be maintained to ensure functional reliability across the intended application environment.

Voltage Supply Compatibility: Substitute parts must operate within voltage ranges that encompass or match the original specification to ensure safe operation within the host system's power delivery constraints.

The 93AA56A-I/P qualifies as a direct substitute based on these criteria, with the distinction that it extends the minimum supply voltage specification to 1.8V, providing broader low-voltage application support while maintaining all other functional parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the 93LC56A-I/P and 93AA56A-I/P maintain Active product status and ROHS3 compliance, confirming ongoing manufacturer support and environmental regulatory adherence. The 93LC56A-I/P carries verified programmability certification through DiGi-Electronics, while the 93AA56A-I/P does not carry this verification designation.

Selection between these parts should be based on system voltage requirements. The 93LC56A-I/P operates from 2.5V minimum supply voltage, while the 93AA56A-I/P extends operation to 1.8V minimum. For systems operating above 2.5V supply voltage, either part provides functional equivalence. For systems requiring operation below 2.5V supply voltage, the 93AA56A-I/P becomes the necessary selection.

Inventory availability should be considered in procurement planning, with the 93LC56A-I/P currently stocked at 1860 units and the 93AA56A-I/P at 1210 units.

Frequently Asked Questions (FAQ)

Q: Can the 93AA56A-I/P directly replace the 93LC56A-I/P in existing designs?

A: Yes, the 93AA56A-I/P provides direct functional substitution for the 93LC56A-I/P in applications where the system supply voltage remains at or above 2.5V. Both devices share identical memory capacity, organization, interface protocol, package format, and operating temperature specifications. No circuit modifications are required for substitution in voltage-compatible applications.

Q: What is the primary difference between these two parts?

A: The primary difference is the minimum supply voltage specification. The 93LC56A-I/P operates from 2.5V to 5.5V, while the 93AA56A-I/P operates from 1.8V to 5.5V. The 93AA56A-I/P provides extended low-voltage operation capability. All other electrical and mechanical specifications remain identical.

Q: Are both parts available in the same package format?

A: Yes, both the 93LC56A-I/P and 93AA56A-I/P are supplied in 8-DIP (0.300", 7.62mm) through-hole packages. They are mechanically and electrically interchangeable at the package level, allowing direct socket substitution without PCB layout modifications.

Q: What does the verified programmability certification mean for the 93LC56A-I/P?

A: The DiGi-Electronics verified programmability designation indicates that the 93LC56A-I/P has been tested and confirmed to support programming operations through DiGi-Electronics' verification process. The 93AA56A-I/P does not carry this specific verification, though both parts are manufactured to identical Microchip specifications for memory programming capability.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes, both the 93LC56A-I/P and 93AA56A-I/P are ROHS3 compliant and REACH unaffected, confirming compliance with current environmental and hazardous substance regulations applicable to electronic components.