GENERAL DESCRIPTION

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 bidirectional 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.

BENEFITS AND FEATURES

• Allows Easy Interface Between an I2C Micro Port and a 1-Wire Slave

    o I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds

    o 8 Channels of Independently Operated 1-Wire I/O

    o 1-Wire Master I/O with Selectable Active or Passive 1-Wire Pullup

    o Provides Reset/Presence, 8-Bit, Single-Bit, and 3-Bit 1-Wire I/O Sequences

    o Standard and Overdrive 1-Wire Communication Speeds

    o Three Address Inputs for I2C Address Assignment

• Minimizes Line Noise, Reducing System EMI

    o Slew-Controlled 1-Wire Edges

• Supports EEPROMs, Temp Sensors, or Other 1-Wire Slaves That Have Momentary High Source Current Modes

    o Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path

    o 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

• 16-Pin SO Package (150 mils)

APPLICATIONS

    Wireless Base Stations

    Central Office Switches

    PBXs

    Rack-Based Servers

    Medical Clinical Diagnostic Equipment