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DS2482-100 Single-Channel 1-Wire Master

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 Device

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Status

Part Number Status

DS2482-100 Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Description

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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. To optimize 1-Wire waveform generation, the DS2482-100 performs slew rate control on rising and falling 1-Wire edges and provides additional programmable features to match drive characteristics to the 1-Wire slave environment. Programmable strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. The DS2482-100 combines these features with an output to control an external MOSFET for enhanced strong pullup application. The I²C slave address assignment is controlled by two binary address inputs, resolving potential conflicts with other I²C slave devices in the system.

Key Features Applications/Uses

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 Three-Bit 1-Wire IO Sequences
Standard and Overdrive 1-Wire Communication Speeds
Slew Controlled 1-Wire Edges
Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements
Two Address Inputs for I²C Address Assignment
Operating Range: 2.9V to 5.5V, -40°C to +85°C
8-Pin, 150-mil SO Package and 9 WLP Package

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