W83L786NR/NG is an evolving product of W83L785R -- Winbonds most popular hardware monitoring IC, and intelligent fan controlling IC. Specifically designed for the graphic cards and barebone /mini systems, W83L786NR/NG can be used to monitor several critical hardware parameters of the system, including voltages, fan speeds, and temperatures, which are very important for the system to work stably and properly.
■ Measure the temperature with high accuracy.
■ One thermal diode sensor (current mode) connected to CPU/GPU and one remote
sensor either by thermal diode (current mode) or thermistor.
■ Programmable hysteresis and setting points (alarm thresholds) for all monitored
■ 3 voltage sensor inputs.
--- Typically for Vcore, RAM, etc.
■ 3D/2D application being used and transferring fan set to the most appropriate fan
■ Fan set: power on configuration for fan speed at four rotation rate levels at 43%, 62%,
81%, and 100% duty cycle.
■ Two DC/PWM fan output control.
■ SMART FANTM function compliant.
■ Total up to 2 sets of fan speed monitoring and controlling.
■ Issue FAN_FAULT#, VOLTAGE_FAULT#, TEMP_FAULT#, and INT# signals to
activate system protection.
■ Warning signal pop-up in application software.
■ Interface: I²C / SMBus control.
■ 1 bit I2C address selection.
■ Up to 7 GPIOs.
■ Winbond hardware monitoring application software (Hardware DoctorTM) support
Windows 95 / 98 / 2000 / XP and Windows NT 4.0 / 5.0.
■ 3.3V VCC operation.
■ 20-pin SSOP (209mil).