93C66C-I/MS

Memory IC Overview

The Microchip Technology 93C66C-I/MS is a 4-kbit Electrically Erasable Programmable Read-Only Memory (EEPROM) housed in an 8-pin MSOP package. It features a Microwire-compatible 3-wire serial interface with a maximum clock frequency of 2 MHz and a typical access time of 200 ns. The device operates within a supply voltage range of 4.5 V to 5.5 V, drawing a maximum active read current of 2 mA. It supports memory organizations of 512 x 8 or 256 x 16 bits, ensuring data retention for up to 200 years. The component is rated for industrial temperature operation from -40°C to +85°C.

Memory IC Feature Summary

• Supports Microwire 3-wire serial communication protocol
• Provides high reliability with extended data retention capabilities
• Operates within standard 5V logic supply requirements

Memory IC Applications

• Industrial control systems requiring non-volatile parameter storage
• Consumer electronics utilizing low-pin-count memory interfaces
• Embedded devices needing configuration data preservation

Memory IC Procurement Notes

Verify the specific suffix 'I/MS' to confirm the industrial temperature grade (-40°C to +85°C) and the MSOP-8 surface-mount package. Ensure compatibility with the 4.5 V to 5.5 V operating voltage range required by this variant. Confirm that the 2 MHz clock speed meets system timing requirements. Cross-reference the manufacturer part number against official Microchip databases to validate authenticity and current production status before procurement.

Memory IC Selection Notes

Select this component when a compact surface-mount EEPROM is needed for Microwire-based architectures. It is suitable for designs constrained by pin count and board space, offering a smaller footprint compared to DIP packages. Choose this variant over lower-speed models if faster serial access is required within the 5V domain. Ensure the application environment remains within the specified industrial temperature limits to maintain performance specifications.

Memory IC Part Context

This device belongs to the Microchip 93Cxx series of serial EEPROMs, designed for cost-effective data storage in embedded applications. The 93C66C variant specifically offers 4-kbit capacity, balancing density with simplicity. The MSOP package provides a small outline solution ideal for modern PCB layouts. This series is widely used in industries requiring reliable, low-power non-volatile memory solutions.

Memory IC Replacement Considerations

Direct replacements include other 93C66 variants with compatible pinouts and electrical characteristics, such as the 93C66B-I/MS or 93C66C-I/P, provided the package type matches the design constraints. Verify that substitute parts support the same Microwire interface and voltage ranges.