General Description

The EMC1201 and EMC1202 are temperature sensors that communicate with a host over a single-wire SMSC BudgetBus™ Sensor Interface. The EMC1201 has an internal temperature sensor and the EMC1202 adds one remote diode. Packaged in a SOT23-5, the EMC1201 provides an accurate, low-cost, low-current, solution for critical temperature monitoring in applications such as embedded systems or computers. 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 extends 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

— < 3uA 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

■ SOT23-5 Green, Lead-free Packages

Applications

■ Desktop and Notebook Computers

■ Thermostats

■ Smart batteries

■ Industrial/Automotive

■ Other Electronic Systems