AT93C57W-10SC Equivalent & Substitute Parts

Part Overview

The AT93C57W-10SC is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface with a 2 MHz clock frequency. This component is designed for non-volatile data storage applications requiring serial memory access. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

AT93C57W-10SC

Microchip TechnologyIn Stock: 2837AT93C57W-10SC Datasheet

Current PartRFQ

93AA56/SN

Microchip TechnologyIn Stock: 199093AA56/SN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT93C57W-10SC is determined by the following critical parameters:

• Memory capacity (2Kbit) and organization (256 x 8, 128 x 16)
• Package form factor (8-SOIC with identical physical dimensions)
• Surface mount compatibility
• Operating temperature range (0°C ~ 70°C minimum)
• Clock frequency capability (2 MHz minimum)
• Write cycle time (10ms maximum)
• Non-volatile EEPROM technology

The 93AA56/SN meets these core requirements while offering extended voltage supply compatibility and improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The 93AA56/SN is a direct functional substitute for the AT93C57W-10SC based on matching memory capacity, organization, clock frequency, write cycle time, package form factor, and operating temperature specifications. The substitute part offers the following advantages:

• Active product status with ongoing manufacturer support
• ROHS3 compliance versus non-compliant status of the original part
• Extended voltage supply range (1.8V ~ 5.5V) providing greater design flexibility
• Verified programmability status through DiGi-Electronics

The primary interface difference between the parts is the serial protocol: the original AT93C57W-10SC uses 3-Wire Serial interface, while the 93AA56/SN implements Microwire interface. Both protocols are compatible serial memory access methods supporting the same memory organization and timing specifications.

Frequently Asked Questions (FAQ)

Q: Can the 93AA56/SN directly replace the AT93C57W-10SC in existing designs?

A: The 93AA56/SN matches all critical electrical and mechanical parameters including memory capacity, package form factor, clock frequency, and write cycle time. The interface difference (Microwire versus 3-Wire Serial) requires protocol-level compatibility verification in the host system design.

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

A: The 93AA56/SN supports 1.8V ~ 5.5V operation compared to the AT93C57W-10SC range of 4.5V ~ 5.5V. This extended range provides design flexibility for lower-voltage applications while maintaining full compatibility with the original 4.5V ~ 5.5V operating window.

Q: Are the physical packages identical?

A: Both parts use 8-SOIC packaging with identical dimensions (0.154", 3.90mm Width), ensuring PCB layout and mechanical compatibility without modification.

Q: What does the RoHS compliance difference mean for new designs?

A: The 93AA56/SN is ROHS3 compliant, meeting current environmental and regulatory requirements for new product development. The AT93C57W-10SC non-compliant status restricts its use in applications subject to RoHS regulations.

Q: Is the 93AA56/SN suitable for the same temperature range applications?

A: Both parts operate across the 0°C ~ 70°C temperature range, supporting identical thermal specifications for industrial and commercial applications.