---
name: "sdtemp"
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/sdtemp"
---

# sdtemp(4)

SO-DIMM (JC-42.4) temperature sensor

## NAME

**sdtemp** – SO-DIMM (JC-42.4) temperature sensor

## SYNOPSIS

**sdtemp\* at iic?**

## DESCRIPTION

The **sdtemp** driver retrieves temperature sensor information from memory modules which contain sensor chips defined in JEDEC JC-42.4.

Current sensor chips include:

- ADT ADT7408

  - Atmel AT30TS00

  - Atmel AT30TSE002

  - Atmel AT30TSE004

  - Giantec GT30TS00

  - Giantec GT34TS02

  - IDT TSE2002B3

  - IDT TSE2002GB2

  - IDT TSE2004GB2

  - IDT TS3000B3

  - IDT TS3000GB0

  - IDT TS3000GB2

  - IDT TS3001GB2

  - Maxim 6604

  - Microchip MCP9804

  - Microchip MCP9805

  - Microchip MCP98242

  - Microchip MCP98243

  - Microchip MCP98244

  - NXP SE97

  - NXP SE98

  - ON CAT34TS02

  - ON CAT34TS04

  - ON CAT6095

  - ST STTS424

  - ST STTS2002

  - ST STTS2004

  - ST STTS3000

  ## SEE ALSO

[iic(4)](/iic/4.md)

## HISTORY

The **sdtemp** device driver first appeared in OpenBSD 4.4.