ANALOG DEVICES DS28E18Q+T

DS28E18Q+T is a 1-Wire® to I²C/SPI bridge with a command sequencer. This simple communications bridge that resides at a remote SPI or I²C sensor and allows the sensor to be controlled by just two wires coming from the host system. It reduces the wire count from six (for SPI) or four (for I²C). These two wires use Analog Device's 1-wire protocol that combines power and signal on a single wire, and which is driven by the programmable I/O pins on the host’s microcontroller. The 1-Wire network supports connection lengths up to 100m and 10 sensor nodes or more. The IC provides a 512-byte command sequencer in SRAM that can be loaded with multiple I²C or SPI commands. Once loaded, the host controller sends a command to execute the sequence, power, and collect data from attached I²C or SPI peripherals. It is used in applications such as examining environmental conditions, accessory identification and control, equipment configuration and monitoring, and grain elevator monitoring.