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ADM1030ARQZ-REEL Scheda tecnica(PDF) 4 Page - ON Semiconductor |
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ADM1030ARQZ-REEL Scheda tecnica(HTML) 4 Page - ON Semiconductor |
4 / 29 page REV. A ADM1030 –4– PIN FUNCTION DESCRIPTIONS Pin No. Mnemonic Description 1 PWM_OUT Digital Output (Open-Drain). Pulsewidth modulated output to control fan speed. Requires pull-up resistor (10 k W typical). 2 TACH/AIN Digital/Analog Input. Fan tachometer input to measure fan speed. May be reprogrammed as an analog input to measure speed of a 2-wire fan via a sense resistor (2 W typical) 3, 4, 11, 12 NC Not Connected. 5 GND System Ground. 6VCC Power. Can be powered by 3.3 V Standby power if monitoring in low power states is required. 7 THERM Digital I/O (Open-Drain). An active low thermal overload output that indicates a violation of a temperature set point (overtemperature). Also acts as an input to provide external fan control. When this pin is pulled low by an external signal, a status bit is set, and the fan speed is set to full-on. Requires pull-up resistor (10 k W). 8 FAN_FAULT Digital Output (Open-Drain). Can be used to signal a fan failure. Requires pull-up resistor (typically 10 k W). 9D– Analog Input. Connected to cathode of an external temperature-sensing diode. The temperature- sensing element is either a Pentium III substrate transistor or a general-purpose 2N3904. 10 D+ Analog Input. Connected to anode of the external temperature-sensing diode. 13 ADD Three-state Logic Input. Sets two lower bits of device SMBus address. 14 INT Digital Output (Open-Drain). Can be programmed as an interrupt output for temperature/fan speed interrupts. Requires pull-up resistor (10 k W typical). 15 SDA Digital I/O. Serial Bus Bidirectional Data. Open-drain output. Requires pull-up resistor (2.2 k W typical). 16 SCL Digital Input. Serial Bus Clock. Requires pull-up resistor (2.2 k W typ). PIN CONFIGURATION TOP VIEW (Not to Scale) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 PWM_OUT SCL ADM1030 TACH/AIN SDA NC INT NC ADD GND NC VCC NC THERM D+ FAN_FAULT D– NC = NO CONNECT Rev. 2 | Page 4 of 29 | www.onsemi.com |
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