General Description

The DS2482-100 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 DS2482-100 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 a I2C Microport and a 1-Wire Slave

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

    • 1-Wire Master IO with Selectable Active or Passive 1-Wire Pullup

    • Provides Reset/Presence, 8-Bit, Single-Bit, and 3-Bit 1-Wire IO Sequences

    • Standard and Overdrive 1-Wire Communication Speeds

    • Two Address Inputs for I2C Address Assignment

• Minimizes Line Noise Reducing System EMI

    • Slew-Controlled 1-Wire Edges

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

    • Strong 1-Wire Pullup Provided by an Internal LowImpedance Signal Path

    • PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements

• Operating Range: 2.9V to 5.5V, -40°C to +85°C

• 8-Pin (150 mils) SO and 9-Bump WLP Packages

Applications

    Printers

    Medical Instruments

    Industrial Sensors

    Cell Phones, PDAs