Remote sensor connection, usually using a serial interface
Maxim DS28E18 Bridge for Extended Connection Distance
Connecting I2C/SPI devices over a distance of 100m with two wires


As sensors are utilized in various applications, the need to increase connection range is growing.

On the 18th, Maxim Integrated Korea introduced the 'DS28E18', a 1-Wire®-I2C/SPI bridge that lowers the cost and reduces the complexity of expanding remote sensor network connections.

Most designers use serial interfaces to connect remote sensors in remote monitoring applications. Based on the most commonly used protocol, five external switches are required to connect devices over a distance of 100m.

The DS28E18, which utilizes a 1-wire protocol for connecting I2C and SPI compatible sensors, can connect I2C or SPI peripherals over 100m away using only two wires, unlike competing solutions that require four wires for I2C or six wires for SPI.

It can perform both power supply and communication functions with a single wire, and reduces connection costs and software complexity by reducing the number of extender and switch ICs to up to five.

Some currently widely available interfaces require six cables to connect multiple expansion sensors to a host MCU.

The DS28E18 simplifies host MCU design and software complexity by converting the 1-wire protocol into I²C and SPI master interfaces.

With just one host MCU programmable I/O port, you can operate a network consisting of 10 to 20 nodes.