MAX6602 19-0620 Rev 1 8/07 Five-Channel Precision Temperature Monitor General Description Features Four Thermal-Diode Inputs The MAX6602 precision multichannel temperature sen- sor monitors its own temperature and the temperatures Local Temperature Sensor of up to four external diode-connected transistors. All 1C Remote Temperature Accuracy (+60C to +100C) temperature channels have programmable alert thresh- Temperature Monitoring Begins at POR for Fail- olds. Channels 1 and 4 also have programmable Safe System Protection overtemperature thresholds. When the measured tem- ALERT and OVERT Outputs for Interrupts, perature of a channel exceeds the respective thresh- Throttling, and Shutdown old, a status bit is set in one of the status registers. Two open-drain outputs, OVERT and ALERT, assert corre- STBY Input for Hardware Standby Mode sponding to these bits in the status register. Small, 16-Pin TSSOP Package The 2-wire serial interface supports the standard system 2-Wire SMBus Interface management bus (SMBus) protocols: write byte, read byte, send byte, and receive byte for reading the tem- perature data and programming the alarm thresholds. The MAX6602 is specified for a -40C to +125C oper- Ordering Information ating temperature range and is available in a 16-pin TSSOP package. PIN- SLAVE PKG PART PACKAGE ADDRESS CODE Applications MAX6602UE9A+ 16 TSSOP 1001 101 U16-1 Desktop Computers Note: This device is specified over the -40C to +125C Notebook Computers temperature range. +Denotes lead-free package. Workstations Servers SMBus is a trademark of Intel Corp. Pin Configuration appears at end of data sheet. Typical Application Circuit +3.3V CPU 4.7k 1 16 EACH DXP1 GND 2200pF 2 15 CLK DXN1 SMBCLK 3 MAX6602 14 DATA DXP2 SMBDATA 2200pF INTERRUPT 4 13 DXN2 ALERT TO P 5 12 DXP3 V CC 2200pF 0.1F 6 11 DXN3 OVERT TO SYSTEM 7 10 DXP4 SHUTDOWN N.C. 2200pF 8 9 DXN4 STBY Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Five-Channel Precision Temperature Monitor ABSOLUTE MAXIMUM RATINGS V , SMBCLK, SMBDATA, ALERT, OVERT, ESD Protection (all pins, Human Body Model)................2000V CC Operating Temperature Range .........................-40C to +125C STBY to GND .......................................................-0.3V to +6V DXP to GND..............................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC Storage Temperature Range .............................-60C to +150C DXN to GND ........................................................-0.3V to +0.8V Lead Temperature (soldering, 10s) .................................+300C SMBDATA, ALERT, OVERT Current....................-1mA to +50mA DXN Current .......................................................................1mA Continuous Power Dissipation (T = +70C) A 16-Pin TSSOP (derate 11.1mW/C above +70C)..............................888.9mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.0V to +5.5V, V = V , T = -40C to +125C, unless otherwise noted. Typical values are at V = +3.3V and T = CC STBY CC A CC A +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 5.5 V CC Software Standby Supply Current I SMBus static 30 A SS Operating Current I During conversion 500 1000 A CC Channel 1 only 11 Temperature Resolution Bits Other diode channels 8 T = T = +60C to +100C -1.0 +1.0 A RJ T = T = 0C to +125C -3.0 +3.0 A RJ o Remote Temperature Accuracy V = 3.3V C CC DXN grounded, 2.5 T = T = 0C to +85C RJ A T = +60C to +100C -3.3 +0.7 A o Local Temperature Accuracy V = 3.3V C CC T = 0C to +125C -5.0 +1.0 A Supply Sensitivity of Temperature o 0.2 C/V Accuracy Resistance cancellation off 95 125 156 Remote Channel 1 Conversion t ms CONV1 Time Resistance cancellation on 190 250 312 Remote Channels 2 Through 4 t 95 125 156 ms CONV Conversion Time High level 80 100 120 Remote-Diode Source Current I A RJ Low level 8 10 12 Undervoltage-Lockout Threshold UVLO Falling edge of V disables ADC 2.30 2.80 2.95 V CC Undervoltage-Lockout Hysteresis 90 mV Power-On Reset (POR) Threshold V falling edge 1.2 2.0 2.5 V CC POR Threshold Hysteresis 90 mV ALERT, OVERT I = 1mA 0.3 SINK Output Low Voltage V V OL I = 6mA 0.5 SINK Output Leakage Current 1A 2 MAX6602