47L64T-I/SN

Overview

The Microchip Technology 47L64T-I/SN is a 64-Kbit Serial EERAM (E2PROM RAM) memory device featuring an SRAM core with hidden EEPROM backup. It operates on the I2C interface with a maximum clock frequency of 1 MHz and an access time of 550 ns. The device supports a supply voltage range of 2.7V to 3.6V and is housed in an 8-pin SOIC package. It offers industrial temperature operation from -40°C to +85°C, ensuring data retention for over 200 years.

Feature Summary

• Combines high-speed SRAM performance with non-volatile EEPROM backup capabilities
• Supports standard I2C communication protocol for efficient serial data transfer
• Provides automatic data preservation during power transitions without user intervention

Applications

• Data logging systems requiring frequent write cycles
• Configuration storage in embedded controllers
• Real-time clock backup memory modules

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when ordering. Confirm the operating voltage range matches the system design, as this variant is limited to 2.7V-3.6V. Ensure the I2C bus speed requirements align with the 1 MHz maximum clock frequency specification provided in the official datasheet.

Selection Notes

Select this component when high endurance and fast write speeds are critical, as the SRAM core avoids the slow write times typical of pure EEPROMs. The hidden backup feature simplifies software design by eliminating manual save routines. Compare against standard EEPROMs if power loss protection is required without complex battery management circuits.

Part Context

This part belongs to the 47L6 series of Serial EERAMs from Microchip Technology. It differs from the 24LC64 series by using an SRAM core instead of floating gate technology, offering significantly faster write speeds. The 'I' designation indicates industrial temperature grading, while 'SN' specifies the 8-pin SOIC package type.

Replacement Considerations

Direct substitutes include other 64-Kbit I2C EERAM devices from Microchip such as the 47L64-I/SN. Verify pin compatibility and voltage ranges when replacing with generic I2C EEPROMs, as write cycle times will differ significantly due to the underlying memory technology.