93C66A-E/SN

Memory IC Overview

The Microchip Technology 93C66A-E/SN is a Microwire serial EEPROM offering 4 Kbit (512 x 8) storage capacity in an 8-SOIC package. It operates on a single supply voltage ranging from 2.5 V to 5.5 V with a maximum clock frequency of 2 MHz. The device supports synchronous data transfer and features a write cycle time of 6 ms per word or page. It provides a minimum data retention of 200 years and endurance of 1,000,000 write/erase cycles, functioning within a temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports Microwire three-wire serial interface for efficient pin usage
• Configurable memory organization allows selection between 8-bit and 16-bit word widths
• Includes self-timed write cycle control with automatic busy flag generation
• Provides hardware write-protect capability via dedicated control pins

Memory IC Applications

• Industrial equipment configuration storage
• Automotive sensor calibration data retention
• Consumer electronics parameter backup
• Embedded system identification codes

Memory IC Procurement Notes

Verify the specific suffix 'E' indicates RoHS compliance and lead-free construction when ordering. Confirm the 'SN' designation corresponds to the SOIC-8 plastic package variant. Ensure the industrial temperature grade (-40°C to +85°C) meets your environmental requirements. Check current availability status as manufacturing lifecycles may change without notice.

Memory IC Selection Notes

Select this component when a Microwire interface is required instead of SPI or I2C. Choose the 8-SOIC package for surface-mount assembly constraints. Consider the 2.5 V lower voltage limit if operating in low-power systems compared to older 4.5 V variants. Verify that the 2 MHz clock speed satisfies your system's timing budget.

Memory IC Part Context

This part belongs to the 93xx66 family of serial EEPROMs manufactured by Microchip Technology. It serves as a non-volatile memory solution for applications requiring moderate storage density with simple serial communication protocols. The device is designed to replace legacy parallel EEPROMs while reducing board space and connection complexity.

Memory IC Replacement Considerations

Direct replacements include other 93LC66 variants with compatible pinouts and electrical characteristics. Verify that substitute parts maintain the same Microwire protocol compatibility and voltage ranges.