---
name: "fintek"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/fintek"
---

# fintek(4)

Fintek F75375 temperature sensor

## NAME

**fintek** – Fintek F75375 temperature sensor

## SYNOPSIS

**fintek\* at iic? flags 0x0000**

## DESCRIPTION

The **fintek** driver provides support for the Fintek F75375 temperature sensor and fan controller. The sensor possesses a collection of sensor values which are made available through the [sysctl(8)](/sysctl/8.md) interface:

```
$ sysctl hw.sensors.fintek0
hw.sensors.fintek0.temp0=31.00 degC
hw.sensors.fintek0.temp1=29.00 degC
hw.sensors.fintek0.fan0=0 RPM
hw.sensors.fintek0.fan1=0 RPM
hw.sensors.fintek0.volt0=1.72 V DC (VCC)
hw.sensors.fintek0.volt1=1.34 V DC
hw.sensors.fintek0.volt2=1.73 V DC
hw.sensors.fintek0.volt3=0.90 V DC
```

On some machines the fans will not function properly with the chip in default mode. Setting **flags** to 0x0001 will make the fans run at full speed to prevent overheating.

## SEE ALSO

[iic(4)](/iic/4.md), [intro(4)](/intro/4.md), [sensorsd(8)](/sensorsd/8.md), [sysctl(8)](/sysctl/8.md)

## HISTORY

The **fintek** driver first appeared in OpenBSD 4.0.

## AUTHORS

The **fintek** driver was written by Dale Rahn ⟨*drahn@openbsd.org*⟩.