EMC1438 1C Multiple Temperature Sensor with Hardware Controlled Standby & Hottest of Multiple Zones Datasheet PRODUCT FEATURES General Description Features Hardware Set Standby Mode The EMC1438 is a high accuracy, low cost, System 200uA (typical) quiescent current in Standby Management Bus (SMBus) temperature sensor. Designed to support 45nm, 65nm, and 90nm CPU Advanced features such as Resistance Error Correction diodes (REC), Beta Compensation (to CPU diodes requiring the Supports diodes requiring the BJT or transistor model BJT or transistor model) and automatic diode type Resistance Error Correction (up to 100 Ohms) detection combine to provide a robust solution for Up to seven External Temperature Monitors complex environmental monitoring applications. 1C Accuracy (40C < T < 110C) Additionally, the hardware controlled STANDBY pin DIODE 0.125C Resolution allows for system level power shutdown to support Supports up to 2.2nF filter capacitor energy saving initiatives. Anti-parallel diodes for extra diode support and The EMC1438 monitors up to eight temperature compact design channels (up to seven external and one internal). The Internal Temperature Monitor device provides 1C accuracy for the internal and 1C Accuracy external diode temperatures. 0.125C Resolution Programmable temperature limits for ALERT and Temperature monitoring includes two tiers of protection: THERM one that can be masked and causes the ALERT pin to 3.3V Supply Voltage be asserted, and the other that cannot be masked and SMBus 2.0 interface causes the THERM pin to be asserted. Pin-selectable SMBus address Applications Block Read and Write Notebook Computers Available in a 16-pin 4mm x 4mm QFN Lead-free Desktop Computers RoHS Compliant package Industrial Embedded Applications Block Diagram DP1 DN1 Voltage to Temp DP2 / DN3 External ADDR SEL Conversion Temp DN2 / DP3 Diode DP4 / DN5 SMCLK Inputs DN4 / DP5 Voltage Register DP6 / DN7 SMDATA SMBus Analog 11 bit DN6 / DP7 Temp Registers Slave Mux ADC ALERT Protocol THERM Anti- Hottest of parallel Comparison Internal STANDBY Diode Temp Diode SMSC EMC1438 DATASHEET Revision 1.0 (04-29-10) 1C Multiple Temperature Sensor with Hardware Controlled Standby & Hottest of Multiple Zones Datasheet Ordering Information: ORDERING NUMBER PACKAGE FEATURES EMC1438-1-AP-TR 16-pin QFN 4mm x 4mm Up to 7 external diodes. Hottest Of (Lead-free RoHS compliant) temperature comparison. ALERT and THERM outputs. Standby low power state. ALERT pin masked and APDs enabled at power up. EMC1438-2-AP-TR 16-pin QFN 4mm x 4mm Up to 7 external diodes. Hottest Of (Lead-free RoHS compliant) temperature comparison. ALERT and THERM outputs. Standby low power state. ALERT pin masked and APDs disabled at power up. REEL SIZE IS 4,000 PIECES This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright 2010 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order (theTerms of Sale Agreemen). The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSCs website at