BUY DS2502+TR https://www.utsource.net/itm/p/4390066.html

Manufacturer: Maxim Description: The DS2502+ is a 1-Wire add-on chip that provides 256 bits of read/write nonvolatile memory and a unique 64-bit registration number. Features: 256 bits of read/write nonvolatile memory 64-bit registration number Low-power CMOS technology Operating voltage range of 2.8V to 5.25V Operating temperature range of -40°C to +85°C Low-power write cycle Low-power read cycle Low-power sleep mode Low-power write protect mode Write protect pin ESD protection Applications: Automotive Industrial Medical Security Home Automation Toys Wearable Electronics Consumer Electronics (For reference only)