EMC1812 datasheet(14/102 Pages) MICROCHIP

14 / 102 page

Detailed Description

The EMC1812/13/14/15/33 devices monitor one internal diode and up to four externally-connected

temperature diodes.

Thermal management is performed in cooperation with a host device. This consists of the host reading

the temperature data of both the external and internal temperature diodes of the EMC1812/13/14/15/33

and using that data to manage thermal events or to control the speed of one or more fans.

This device family introduces rate of change temperature measurement with associated alerts. This

provides a preemptive system alert and another protective measurement layer to catch and manage

variable system temperatures. Resistance Error Correction automatically eliminates the temperature error

caused by series resistance. This feature allows for routing long traces and off-board connections with

wires, if desired. Automatic beta compensation eliminates the need for substrate diode and transistor

configurations.

The EMC1812/13/14/15/33 family has two levels of monitoring. The first provides a maskable ALERT

signal to the host when the measured temperatures exceed user programmable limits. This allows the

EMC1812/13/14/15/33 to be used as an independent thermal watchdog to warn the host of temperature

hot spots without direct control by the host. The second level of monitoring provides a nonmaskable

interrupt on the THERM pin if the measured temperatures meet or exceed a second programmable limit.

The EMC1812 is a single-channel remote temperature sensor, while the EMC1813 is a dual-channel

remote temperature sensor. The remote channels for this selection of devices can support substrate

diodes, discrete diode connected transistors, or CPU/GPU thermal diodes.

The EMC1814 supports anti-parallel diode (APD) only on one channel. For the channel that does not

support APD functionality, substrate diodes, discrete diode-connected transistors or CPU/GPU thermal

diodes are supported. For the channel that supports APD, only discrete diode connected transistors may

be implemented. However, if APD is disabled on the EMC1814, then the channel that supports APD will

be functional with substrate diodes, discrete diode connected transistors and CPU/GPU thermal diodes.

The EMC1815 and EMC1833 support APD on all channels. When APD is enabled, the channels support

only diode connected transistors. If APD is disabled, then the channels will support substrate transistors,

discrete diode connected transistors and CPU/GPU thermal diodes.

Note: Disabling APD functionality to implement substrate diodes on devices that support APD eliminates

the benefit of APD (two diodes on one channel).

Multi-Channel Low-Voltage Remote Di...

Detailed Description

Datasheet

DS20005751A-page 14

EMC1812 Datasheet(PDF) 14 Page - Microchip Technology