General Description

The DS2483 is an I2C-to-1-WireM bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform protocol con version between the I2C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2483 is a 1-Wire master. Internal, user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, support ing both standard and overdrive 1-Wire communication speeds. In addition, the 1-Wire bus can be powered down under software control. The dual-voltage operation allows different operating voltages on the I2C and 1-Wire side. Strong pullup features support 1-Wire power deliv ery to 1-Wire devices such as EEPROMs and sensors. When not in use, the DS2483 can be put in sleep mode where power consumption is minimal.

Benefits and Features

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

● Standard and Overdrive 1-Wire Communication Speeds

● Adjustable 1-Wire Timing for tRSTL, tMSP, tW0L, and tREC0

● 1-Wire Port Can Be Powered Down Under Software Control

● Supports Power-Saving Sleep Mode (SLPZ Pin), Where the 1-Wire Port is in High Impedance

● I2C Operating Voltages: 1.8V ±5, 3.3V ±10, and

●.0V +5/-10

● Built-In Level Translator: 1-Wire Operating Voltage from 3.3V -10 to 5.0V +5, Independent of I2C Voltage

● Built-In ESD Protection Level of ±8kV Human Body Model (HBM) Contact Discharge on IO Pin

● -40NC to +85NC Operating Temperature Range

● 8-Pin TDFN and 6-Pin SOT23 Packages

Applications

Printers

Medical Instruments

Industrial Sensors

Cell Phones