G7921

Global Mixed-mode Technology Inc. G7921 Three Remote Temperature Sensors and One Fan Controllers with SMBus Serial Interface and System Reset Circuit Features „ Measures Three Remote Temperatures „ Adjustable Offset for Each Sensor via SMBus „ Accuracy: ±1°C (+ 60°C to + 100°C) ±3°C (- 10°C to + 120°C) „ +4.5V to +5.5V Supply Range „ Programmable Hardware Thermal Shutdown for Sensor 2 and Programmable Software Thermal Shutdown for Sensor 1, 3. „ SMBus 2-Wire Serial Interface With Writting Protection Function. „ Alert Signal for Diode Fault, Fan Fail, and Fan Out of Control „ Supports SMBus Alert Response „ Fan Drivers Using Linear Control Algorithm with Built-in MOSFET „ Closed Loop Speed Control and programmable 8 Bits Open Loop Voltage Control for Fan1 „ Wide speed control range for Fan1, Accuracy within 2%, when SET_CNT1 > 50 „ Internal Current- limit and Over-temperature Protection for the Fan „ Reset Function Precision Monitoring of 5V Power-Supply Voltage „ Measure Thermal Diode with Transistor Model „ Support 45nm, 65nm and 90nm CPU thermal diode „ 20-Pin SSOP Package Applications „ Desktop and Notebook „ Central Office Computers „ Telecom Equipment „ Smart Battery Packs „ Industrial Controls „ LAN Servers General Description The G7921 contains 3 precise digital thermometers, one fan controllers, hardware and software thermal shutdown, and a system-reset circuit. The thermometers report the temperature of 3 remote sensors. The remote sensors are diode-connected tra...