CAT24C128YI-GT3

• 128 Kbit Density (16 KB, 16, 384 words)
• I2C Two-Wire Serial interface, 400 K Hz Maximum Bus Frequency
• 1.8 V to 5.5 V Supply range, 5 V Nominal Operation
• 400 Ns Access time; Approximately 3 mA Supply Current
• 8-Pin TSSOP, Surface mount, 3.1 Mm X 4.5 Mm
• -40°C to 85°C, Lead free, RoHS compliant, Tape and Reel

The onsemi CAT24C128YI-GT3 is a 128 Kbit (16 KB, 16, 384 words) serial EEPROM with an I2C two-wire interface in an 8-pin TSSOP package. It operates from 1.8 V to 5.5 V, covering 2.5 V, 3.3 V, and 5 V systems, with a 400 ns access time, 400 k Hz maximum bus frequency, and roughly 3 mA of supply current. The CAT24C128YI-GT3 is rated -40°C to 85°C, is lead free and RoHS compliant, and ships on tape and reel.

Serial EEPROM stores the small persistent data a board must keep through power cycles: calibration coefficients, board and module identity, configuration and user preferences, and fault or usage logs. Byte-level rewrite lets firmware change one field without a page erase, which is why EEPROM remains preferred over flash for settings. The wide supply range and industrial temperature grade suit equipment operating outside a controlled environment, and the TSSOP footprint saves board area over an SOIC while still being reworkable. Typical buyers are automotive, industrial, appliance, and communications equipment OEMs and their contract manufacturers.