CAT25640HU4I-GT3

Product Overview

The CAT25640HU4I-GT3 from onsemi is a surface-mount non-volatile EEPROM memory IC with 64Kbit capacity arranged as 8K x 8. It uses a serial peripheral interface (SPI) and supports a 10 MHz clock frequency, enabling compact serial memory connections in embedded hardware. The device operates from a 1.8V to 5.5V supply and is specified for an ambient operating temperature range of -40°C to 85°C. It is supplied in an 8-UFDFN exposed-pad package, identified as 8-UDFN-EP (2x3), with a 5 ms write cycle time for word or page writes.

Key Features

• 64Kbit EEPROM memory with an 8K x 8 organization for byte-oriented storage.
• SPI serial interface with a 10 MHz clock frequency.
• Non-volatile memory format suitable for retaining data when power is removed.
• 1.8V to 5.5V supply range supports compatibility with low-voltage and 5V logic systems.
• 5 ms word or page write cycle time.
• Surface-mount 8-UFDFN exposed-pad package, 8-UDFN-EP (2x3).

Applications

• Embedded parameter storage in compact controllers where configuration values must persist after power cycling.
• Calibration or identity data retention for small electronic assemblies using an SPI host interface.
• Limited-size non-volatile logging buffers for sensor nodes or portable instruments.

Design & Procurement Notes

When integrating this part, confirm that the host SPI controller can operate within the 10 MHz clock limit and that signal levels are compatible with the 1.8V to 5.5V supply range. Account for the 5 ms write cycle time in firmware, especially when updating configuration or calibration records. The exposed-pad 8-UDFN-EP (2x3) package requires PCB footprint and soldering process alignment, and the -40°C to 85°C ambient rating should be checked against the end-equipment thermal environment. Because the memory organization is 8K x 8, address and buffer sizing should be planned around byte access rather than inferred from a different serial memory family.