Single-Channel 1-Wire Master with Adjustable Timing and Sleep Mode

 

Part Number	Replacement	Explanation

Description

Create a design and simulate using EE-Sim^® tools:

The DS2484 is an I²C-to-1-Wire^® 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.

DS2484: Typical Application Circuit Enlarge+

Key Features

• I²C Host Interface Supports 100kHz and 400kHz I²C Communication Speeds
• Standard and Overdrive 1-Wire Communication Speeds
• Adjustable 1-Wire Timing for t_RSTL, t_MSP, t_W0L, and t_REC0
• 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

Applications/Uses

• Cell Phones
• Industrial Sensors
• Medical Instruments
• Printers