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.

FEATURES

■ I2C Host Interface, Supports 100kHz and 400kHz I2C Communication Speeds

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

■ Provides Reset/Presence, 8-Bit, Single-Bit, and Three-Bit 1-Wire I/O Sequences

■ Eight Channels of Independently Operated 1-Wire I/O

■ Standard and Overdrive 1-Wire Communication Speeds

■ Slew Controlled 1-Wire Edges

■ Selectable 1-Wire Slave Presence Pulse Falling Edge Masking to Control Fast Edges on the 1-Wire Line

■ Supports Low-Impedance 1-Wire Strong Pullup for EEPROMs, Temp Sensors, or Other 1-Wire Slaves That Have Momentary High Current Modes

■ Three Address Inputs for I2C Address Assignment

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

■ 16-Pin SO Package (150 mil)

APPLICATIONS

■ Wireless Base Stations

■ Central Office Switches

■ PBXs

■ Rack-Based Servers

■ Medical Clinical Diagnostic Equipment