EMC1184 Quad Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications Datasheet PRODUCT FEATURES General Description Applications Notebook Computers The EMC1184 is a high accuracy, low cost, 1.8V System Desktop Computers Management Bus (SMBus) compatible temperature sensor. Industrial Advanced features such as Resistance Error Correction (REC), Embedded applications Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 65nm and lower geometry Features processors) and automatic diode type detection combine to Programmable SMBus address provide a robust solution for complex environmental monitoring Support for diodes requiring the BJT/transistor model applications. The ability to communicate at 1.8V SMBus levels Supports 65nm and lower geometry CPU thermal provides compatible I/O for the advanced processors found in diodes todays tablet and smartphone applications. Pin and register compatible with EMC1414 Automatically determines external diode type and The EMC1184 monitors four temperature (three external and optimal settings one internal) channels, providing 1C accuracy for both Resistance Error Correction external and internal diode temperatures. Frequency hops the remote sample frequency to reject REC automatically eliminates the temperature error caused by DC converter and other coherent noise sources* Consecutive Alert queue to further reduce false Alerts series resistance allowing greater flexibility in routing thermal Up to 3 External Temperature Monitors diodes. Frequency hopping* and analog filters ensure remote 25C typ, 1C max accuracy (20C < T < 110C) DIODE diode traces can be as far as eight (8) inches without degrading 0.125C resolution the signal. Beta Compensation eliminates temperature errors Supports up to 2.2nF diode filter capacitor caused by low, variable beta transistors common in today s fine Anti-parallel diodes for extra diode support Internal geometry processors. The automatic beta detection feature Temperature Monitor monitors the external diode/transistor and determines the 1C accuracy optimum sensor settings for accurate temperature 0.125C resolution measurements regardless of processor technology. This frees 3.3V Supply Voltage the user from providing unique sensor configurations for each 1.8V SMBus operation temperature monitoring application. These advanced features Programmable temperature limits for ALERT/THERM2 plus 1C measurement accuracy provide a low-cost, highly (85C default high limit and 0C default low limit) and flexible and accurate solution for critical temperature monitoring THERM (85C default) applications. Available in small 10-pin 3mm x 3mm DFN RoHS compliant package VDD VDD = EMC1184 1.8V 1.8V-3.3V CPU / 3.3V GPU DP1 Conversion Rate Register VDD Thermal Host Switching DN1 Junction Current Low Limit Registers SMCLK SMCLK DP1 Analog High Limit Registers Mux EMC1184 SMDATA SMBus DN1 External SMDATA Temperature Interface DP2 / DN3 THERM Limit Register ADC ALERT / THERM2 Register(s) DN2 / DP3 DP2 / DN3 THERM Hysteresis Register Anti-Parallel Internal THERM / ADDR Diode Power Internal Temp Temperature DN2 / DP3 Diode Control Register GND Interupt Masking Configuration Register ALERT / THERM2 THERM / ADDR SMBus Address Decode Status Registers GND * Technology covered under the US patent 7,193,543. SMSC EMC1184 Revision 1.0 (07-11-13) DATASHEET Digital Mux Limit Comparator Digital Mux SMBus InterfaceQuad Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications Datasheet Ordering Information: SMBUS ORDERING NUMBER PACKAGE FEATURES ADDRESS EMC1184-A-AIA-TR 10-pin DFN 3mm x 3mm Up to four temperature sensors, ALERT/ Selectable via (RoHS compliant) THERM2 and THERM pins, programmable THERM pull-up SMBus address This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs Please contact your SMSC sales representative for additional documentation related to this product such as application notes, anomaly sheets, and design guidelines. Copyright 2013 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