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DS28E18 - 1-Wire to I2C/SPI Bridge

General Description

The DS28E18 is a 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).

Key Features

  • Operate Remote I2C or SPI Devices Using SingleContact 1-Wire Interface.
  • Extending I2C/SPI Communication Distance.
  • Reduce Six Wires (for SPI) or Four Wires (for I2C) to Two Wires.
  • 512-Byte Sequencer for Autonomous Operation of Attached Devices.
  • Two Configurable GPIO Pins for Additional Peripheral Control.
  • No External Power Required.
  • DS28E18 Parasitically Powered from 1-Wire.
  • I2C/SPI Peripheral Power Derived from the 1-Wire Line.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Click here to ask about the production status of specific part numbers. DS28E18 1-Wire® to I2C/SPI Bridge with Command Sequencer General Description The DS28E18 is a 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 Maxim’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.