General Description
The EMC1203 and EMC1204 are temperature sensors that communicate with a host over a single-wire SMSC BudgetBus™ Sensor Interface. The EMC1203 has an internal temperature sensor and monitors up to two remote diodes. An additional remote diode is added with the EMC1204 for a total of three remote zones, and both devices are in a small MSOP-8 package. When used in combination with an SMSC Super I/O host, such as a keyboard controller, a complete thermal management system is created. A power down mode preserves battery life in portable applications. The internal 11-bit sigma delta temperature-to-digital converter provides superb linearity, high accuracy and excellent noise immunity.

Features
■ Single-wire SMSC BudgetBus™ Sensor Interface
■ Low Power, 3.0V to 3.6V Supply
    — < 50uA at 1 conversion per second
    — < 2.5uA in Standby
■ External Temperature Sensor
    — Range -63.875º C to +191.875º C
    — 0.125º C resolution
    — ±1º C Accuracy 60º C to 100º C
    — Diode Fault Reporting
■ Self Contained Internal Temperature Sensor
    — Range 0º C to +85º C
    — 0.125º C resolution
    — ±3º C Accuracy 0º C to 85º C
■ MSOP-8 3x3mm lead-free RoHS compliant packages

Applications
■ Desktop Computers
■ Notebook Computers
■ Server Applications