The DS2482-101 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 DS2482-101 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 DS2482-101 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 DS2482-101 combines these features with an output to control an external MOSFET for enhanced strong pullup application. The I²C slave
address assignment is controlled by one binary address input, resolving potential conflicts with other I²C slave devices in the system. When not in use, the device can be put in sleep mode where power consumption is minimal.
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 3-Bit 1-Wire IO Sequences
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
Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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