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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