The DS2482-800 is an I²C to 1-Wire bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I²C masters to perform bi-directional protocol conversion between the I²C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2482-800 is a 1-Wire master. Internal factory-trimmed timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and Overdrive 1-Wire communication speeds. To optimize 1-Wire waveform generation, the DS2482-800 performs slew-rate control on rising and falling 1-Wire edges and has a programmable feature to mask the fast presence pulse edge that some 1-Wire slave devices can generate. Programmable strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. The DS2482-800 combines these features with eight independent 1-Wire I/O channels. The I²C slave address assignment is controlled by three binary address inputs, resolving potential conflicts with other I²C slave devices in the system.

Features:

• Allows Easy Interface Between an I2C Micro Port and a 1-Wire Slave
• I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds
• 8 Channels of Independently Operated 1-Wire I/O
• 1-Wire Master I/O with Selectable Active or Passive 1-Wire Pullup
• Provides Reset/Presence, 8-Bit, Single-Bit, and 3-Bit 1-Wire I/O Sequences
• Standard and Overdrive 1-Wire Communication Speeds 2
• Three Address Inputs for I2C Address Assignment
• Minimizes Line Noise, Reducing System EMI
• Slew-Controlled 1-Wire Edges
• Supports EEPROMs, Temp Sensors, or Other 1-Wire Slaves That Have Momentary High Source Current Modes
• Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
• PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements
• Wide Operating Range: 2.9V to 5.5V, -40°C to +85°C

Technical details:

• Mfr. Part No.: Maxim Integrated DS2482S-800+
• PCB size: 22 x 26 mm
• 2x Harwin 8 Pins Gold Header M20-9990845 (Vertical)
• Default I2C address is 0x18 - can be changed externally (desolder 0805 zero jumpers) or solder required A0-A2 except Pre-Soldered Board: A0-A2 are not populated
• Designed and Assembled in London, UK

Documents:

Maxim Integrated - How to Use the DS2482 I²C 1-Wire Master

See also:

• ClosedCube RJ25 6P6C Breakout
• ClosedCube DS2484 I2C to 1-Channel OneWire Master Breakout