New Product Introduction

Maxim DS28E18 1-Wire® to I2C/SPI bridge with command sequencer

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

Maxim DS28E18 product image

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.

 

Key features

  • Operate Remote I2C or SPI Devices Using Single-Contact 1-Wire Interface
  • No External Power Required
  • Flexible 1-Wire and I2C/SPI Master Operational Modes
  • Easy to Integrate

 

Additional features

  • Operate Remote I2C or SPI Devices Using Single-Contact 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
  • Flexible 1-Wire and I2C/SPI Master Operational Modes
    • Supports Standard (11 kbps) and Overdrive (90 kbps) 1-Wire Communication
    • 100 kHz, 400 kHz, and 1 MHz for I2C Slaves
    • Up to 2.3MHz for SPI Slaves
  • Easy to Integrate
    • Small, 2 x 3 x 0.75 mm, 8-Pin TDFN Package
    • -40 °C to +85 °C Operation
    • 2.97 V to 3.63 V Operating Voltage Range

 

Applications

  • Accessory Identification and Control
  • Equipment Configuration and Monitoring
  • Examining Environmental Conditions
  • Grain Elevator Monitoring

 

Available tools

Evaluation Kit for the DS28E18:

Maxim DS28E18 1-Wire® to I2C/SPI Bridge | EBV Elektronik

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