DS2484R+T

The DS2484 is an I2C-to-1-WireM bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform protocol conversion between the I2C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2484 is a 1-Wire master. Internal, user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting 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 delivery to 1-Wire devices such as EEPROMs and sensors. When not in use, the DS2484 can be put in sleep mode where power consumption is minimal.

Applications

• Printers
• Medical Instruments
• Industrial Sensors
• Cell Phones

Key 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 5.0V +5/-10%
• Built-In Level Translator: 1-Wire Operating Voltage from 1.8V -5% to 5.0V +5%, Independent of I2C Voltage
• Built-In ESD Protection Level of ±8kV Human Body Model (HBM) Contact Discharge on IO Pin
• -40°C to +85°C Operating Temperature Range
• 8-Pin TDFN and 6-Pin SOT23 Packages