93C66A-I/ST

Memory IC Overview

The Microchip Technology 93C66A-I/ST is a 4-kbit Electrically Erasable Programmable Read-Only Memory (EEPROM) organized as 512 words by 8 bits. It features a 3-Wire Microwire serial interface with a maximum clock frequency of 2 MHz and an access time of 200 ns. The device operates within a supply voltage range of 4.5 V to 5.5 V and is housed in an 8-pin TSSOP package. It supports surface mount installation, functions between -40°C and +85°C, and guarantees data retention for 200 years.

Memory IC Feature Summary

• Supports 3-Wire Microwire serial communication protocol
• Provides high reliability with 200-year data retention capability
• Operates within industrial temperature range from -40°C to +85°C

Memory IC Applications

• Industrial control systems requiring non-volatile parameter storage
• Consumer electronics needing configuration data preservation
• Automotive modules utilizing standard serial memory interfaces

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' to confirm the industrial temperature grade (-40°C to +85°C) and TSSOP-8 package type. Ensure the design accommodates the 4.5 V minimum operating voltage, distinguishing it from lower-voltage variants. Confirm RoHS compliance status through official manufacturer documentation prior to final procurement decisions.

Memory IC Selection Notes

Select this component when a 4-kbit capacity with Microwire interface compatibility is required. It is suitable for designs needing robust data retention and operation at standard 5 V logic levels. Consider alternative packages like SOIC or PDIP if board space allows, or different voltage ranges if system power supplies differ significantly from the 4.5 V to 5.5 V specification.

Memory IC Part Context

This EEPROM belongs to the 93C66 family of serial memory devices manufactured by Microchip Technology. The family offers various organizational options and package types to suit diverse embedded memory needs. The 93C66A variant specifically targets applications requiring reliable non-volatile storage with simple serial connectivity.

Memory IC Replacement Considerations

Direct replacements include other 93C66 series parts such as 93LC66A-I/SN or 93C66A-I/P, provided pinout and electrical specifications match. Verify that substitute components support the same 3-Wire interface and voltage requirements.