onsemi NCT7491
The NCT7491 is a two−wire serially programmable hardware monitor. It can monitor 2 remote temperature zones and its own ambient temperature. The NCT7491 also implements an SMBus compatible master, allowing it to read automatically from thermal sensors on the SMBus.| Part No. | NCT7491 |
|---|---|
| Datasheet | NCT7491 Download |
| Manufacturer |  onsemi |
| Description | Remote Thermal Monitor and Fan Controller |
| Buy | Stock & Price |
FEATURES
● PECI 3.0 Master for CPU Monitoring● SMBus Compatible Master
● On−chip Temperature Sensor
● 2 Remote Sensor Channels
● Series Resistance Cancellation on Remote Sensors
● 3 PWM Fan Control Outputs
● 4 Tach Monitoring Input
● PWM Automatic Fan Speed Control
● 4 Analog Inputs for Voltage Monitoring
● Vdd Supply Voltage Monitoring
● PECI VTT Voltage Monitoring
● Overtemperature Outputs
● Limit Comparison of Monitored Channels
● SMBus Address Selection Allows up to 3 Devices
● Meets SMBus 2.0
ELECTRICAL SPECIFICATIONS
(fully SMBus 1.1 compliant)● These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant QFN24 MN SUFFIX CASE 485L QSOP24 RQ SUFFIX CASE 492B MARKING DIAGRAMS NCT 7491 ALYWG G (Top View) A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location) NCT7491 A YYWWG (Top View) (Bottom View) NCT7491 = Specific Device Code A = Assembly Location YY = Year WW = Work Week G = Pb−Free Package ORDERING...
