The DS2482S-100+T&R is a single channel 1-wire master in 8 pin NSOIC package. It is an I2C to 1-wire bridge device that interfaces directly to standard (100KHz) or fast (400KHz) I2C masters to perform bidirectional protocol conversion between I2C master and any downstream 1-wire slave devices. Relative to any attached 1-wire slave device, the DS2482-100 is a 1-wire master. The internal, factory trimmed timers relieve 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 DS2482-100 performs slew rate control on rising and falling 1-wire edges. Programmable, strong pull-up features support 1-wire power delivery to 1-wire devices such as EEPROMs and sensors. The device combines these features with an output to control an external MOSFET for enhanced strong pull-up application.
- Supply voltage range from 2.9V to 3.7V (3.3V) and 4.5V to 5.5V (5V)
- Operating temperature range from -40°C to 85°C
- 1-wire master IO with selectable active or passive 1-wire pull-up
- Provides reset/presence, 8bit, single bit and 3bit 1-wire IO sequences
- Standard and overdrive 1-wire communication speeds
- Two address inputs for I2C address assignment
- Minimizes line noise reducing system EMI
- Strong 1-wire pull-up provided by an internal low impedance signal path
- PCTLZ output to optionally control an external MOSFET for stronger pull-up requirements
- Operating current of 0.75mA and power-on reset trip point of 2.2V
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