93LC66AX/SN

Memory IC Overview

The Microchip Technology 93LC66AX/SN is a 4Kbit (512 x 8-bit) low-voltage serial EEPROM utilizing advanced CMOS technology. It features a Microwire-compatible 3-wire serial interface with dedicated Data In and Data Out pins, eliminating the need for an ORG pin configuration as it is fixed to 8-bit organization. The device supports a maximum clock frequency of 2 MHz at VCC levels between 2.5V and 5.5V. It includes power-on/off data protection circuitry and self-timed erase/write cycles. The component is available in an 8-lead SOIC package and complies with RoHS standards.

Memory IC Feature Summary

• Fixed 8-bit word organization without external configuration requirements
• Integrated power-on/off data protection circuitry
• Self-timed erase and write cycle initiation via Chip Select signal
• Ready/Busy status signaling on the Data Output pin

Memory IC Applications

• Low-power nonvolatile memory storage
• Industrial control system parameter retention
• Automotive electronic module calibration data storage
• Consumer electronics configuration settings

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and packaging format. Confirm the voltage range aligns with the 2.5V to 5.5V specification for the 'LC' variant. Ensure the package type corresponds to the 8-lead SOIC designation. Cross-reference the manufacturer part number against official Microchip databases to confirm current production status and compliance documentation availability before finalizing procurement.

Memory IC Selection Notes

Select this component when a fixed 8-bit serial interface is required without the complexity of organization pin selection. It is suitable for applications needing robust data protection during power transitions. Consider the 2.5V minimum operating voltage when designing power supply rails. Verify that the 2 MHz clock speed meets the system's communication timing requirements. Evaluate the 8-lead SOIC package dimensions against the available PCB real estate constraints.

Memory IC Part Context

This device belongs to the 93XX66A/B/C family of 4Kbit serial EEPROMs manufactured by Microchip Technology. The 'LC' designation indicates a low-voltage operation range starting at 2.5V, distinct from the 'AA' series which supports lower voltages down to 1.8V. The 'A' suffix denotes a dedicated 8-bit organization, differentiating it from 'B' (16-bit) and 'C' (selectable) variants within the same product line.

Memory IC Replacement Considerations

Direct functional substitutes within the same family include the 93LC66BT-I/SN for 16-bit organization or the 93AA66A-I/SN for extended low-voltage support. Verify pin compatibility and voltage specifications when substituting.