The F75398/399 are the temperature sensor ICs which can support alert signal which is specific designed for notebook, and graphic cards etc. An 11-bit analog-to-digital converter was built inside the IC. The F75398/399 provides 1 local temperature sensor and 1 remote temperature sensors. The remote temperature sensor can be performed by CPU thermal transistor or transistor 2N3906.
The F75398 and F75399 support 2 wire system management bus interface. The users can set up the upper and lower limits (alarm thresholds) of all monitored parameters and this chip can also issue warning messages for system protection when there is something wrong with monitored items. To avoid the unwanted Alert triggering, there is programmable alert queue function.
Through the BIOS or application software, the users can read all the monitored parameters of system all the time. And a pop-up warning can be also activated when the monitored item was out of the proper/pre-setting range. The application software could be Fintek's application utility, or other management application software. The F75398 and F75399 have the same functions but with different SMBus slave address. The F75398 and F75399 are available in a small 8-pin MSOP and powered by 3.3V.