This chip combines the core functions of a fully featured datalogger in a single chip. It includes a temperature sensor, realtime clock (RTC), memory, Onewire interface, and SPI interface for connection of an analog-to-digital converter (ADC), as well as control circuitry for a charge pump.The ADC and the charge pump are peripherals that can be added to build application-specific dataloggers. A total of 8192 byte or 4096 word precision readings taken at equidistant intervals ranging from 1s to 273 hrs can be stored automatically.