SMSC EMC1102

PRODUCT PREVIEW

Revision 2.55 (12-06-06)

Data Brief

PRODUCT FEATURES

EMC1102

SST Compliant

Hardware Monitor with

Two Temperature

Channels

GENERAL DESCRIPTION

The EMC1102 is a one-wire sensor that is capable of

monitoring up to two temperature zones for an Intel PC

platform containing an SST host. The two temperature

zones consist of an internal temperature diode and an

externally connected temperature diode. In cooperation

with a host device, thermal management and fan control

can be performed. Communication takes place over a

one-wire SST based interface. The internal 11-bit delta-

sigma ADC architecture provides superb linearity, high

accuracy, and excellent noise immunity.

APPLICATIONS

Desktop PCs, Servers and Workstations

FEATURES

Single Wire Interface (SST based)

— SST 1.0 compliant

— Fixed Address, Discoverable Device

— Nine programmable addresses

— Supports FCS Abort functionality not available in SST

0.9 compliant devices

Resistance Error Correction

Ideality Configuration

Beta Compensation

External Temperature Monitor

— 0.125°C resolution

— ±1°C Accuracy (50°C to 70°C)

— Diode Fault Reporting

Internal Temperature Monitor

— Range -40°C to +125°C

— 0.125°C resolution

— ±2°C Accuracy (40°C to 70°C)

Supply

— 3.0V to 3.6V

SIMPLIFIED BLOCK DIAGRAM

EMC1102

Internal

Temp

Diode

Switching

Current

Configuration

Register

Status Register

External Temp

Register

Internal Temp

Register

SST

11-bit

delta-sigma

ADC

Digital Mux

and

Byte Interlock

DP

DN

ADD1

ADD0