93LC66AT-E/ST

Memory IC Overview

The Microchip Technology 93LC66AT-E/ST is a 4Kbit low-voltage serial EEPROM utilizing advanced CMOS technology. It features an automotive temperature range of -40°C to +125°C and operates within a supply voltage range of 2.5V to 5.5V. The device employs a Microwire-compatible 3-Wire Serial I/O interface with a maximum clock frequency of 2 MHz. It offers 512 x 8-bit organization, 1,000,000 erase/write cycle endurance, and data retention exceeding 200 years. The component is housed in an 8-lead MSOP package.

Memory IC Feature Summary

• Supports self-timed erase and write cycles including auto-erase functionality before write operations.
• Includes power-on/off data protection circuitry to prevent data corruption during voltage fluctuations.
• Provides Ready/Busy status signaling via the Data Out pin during programming operations.

Memory IC Applications

• Automotive electronic systems requiring nonvolatile memory
• Industrial control applications operating at elevated temperatures
• Low-power embedded devices needing compact serial storage

Memory IC Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature grade (-40°C to +125°C) and 'ST' indicates the 8-lead MSOP package. Confirm compatibility with the 2.5V to 5.5V supply voltage range for your specific application environment. Ensure the manufacturer datasheet DS21795E is referenced for final electrical parameter validation before integration.

Memory IC Selection Notes

Select this part when automotive-grade reliability and extended temperature operation are required. The fixed 512 x 8-bit organization suits applications needing dedicated 8-bit communication without external configuration pins. Consider the MSOP package for space-constrained printed circuit board layouts requiring surface-mount assembly.

Memory IC Part Context

This component belongs to the 93XX66A/B/C family of 4Kbit serial EEPROMs from Microchip Technology. The 'LC' designation specifies the 2.5V minimum operating voltage, distinguishing it from lower-voltage AA series or higher-voltage C series variants. The 'T' suffix typically denotes tape and reel packaging for automated manufacturing processes.

Memory IC Replacement Considerations

Cross-reference with other 93LC66 variants such as 93LC66A or 93LC66C if different temperature grades or voltage ranges are acceptable. Verify package footprint compatibility when substituting between PDIP, SOIC, or MSOP formats.