The DS2484Q+U is a single channel 1-wire master with adjustable timing and sleep mode in 8 pin TDFN package. It 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 I2C master and any downstream 1-wire slave devices. Relative to any attached 1-wire slave device, the IC is a 1-wire master. Internal, user-adjustable timers relieve system host processor from generating time-critical 1-wire waveforms, supporting both standard and overdrive 1-wire communication speeds. 1-wire bus can be powered down under software control. The dual-voltage operation allows different operating voltages on I2C and 1-wire side. Strong pull-up features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. When not in use, IC can be put in sleep mode where power consumption is minimal.
Supply voltage range is 1.71V to 5.25V
Operating temperature range from -40°C to 85°C, independent of I2C voltage
Adjustable 1-wire Ttiming 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%
Built-in ESD protection level of ±8KV human body model (HBM) contact discharge on IO pin
Maximum power-on reset trip point is 1.5V
Maximum supply current is 300μA at no communication, VCC = full range
(EN)
