MAX6699 19-3859 Rev 2 7/07 5-Channel Precision Temperature Monitor General Description Features The MAX6699 precision multichannel temperature sen- Four Thermal-Diode Inputs sor monitors its own temperature and the temperatures Local Temperature Sensor of up to four external diode-connected transistors. All temperature channels have programmable alert 1C Remote Temperature Accuracy (+60C to +100C) thresholds. Channels 1 and 4 also have programmable Temperature Monitoring Begins at POR for Fail-Safe overtemperature thresholds. When the measured tem- perature of a channel exceeds the respective thresh- System Protection old, a status bit is set in one of the status registers. Two ALERT and OVERT Outputs for Interrupts, Throttling, open-drain outputs, OVERT and ALERT, assert corre- and Shutdown sponding to these bits in the status register. Small 16-Pin QSOP and 16-Pin TSSOP Packages The 2-wire serial interface supports the standard system management bus (SMBus) protocols: write byte, read 2-Wire SMBus Interface byte, send byte, and receive byte for reading the tem- perature data and programming the alarm thresholds. The MAX6699 is specified for an operating temperature Ordering Information range of -40C to +125C and is available in 16-pin QSOP and 16-pin TSSOP packages. PIN- PKG PART TEMP RANGE Applications CODE PACKAGE Desktop Computers MAX6699EE -40C to +125C 16 QSOP E16-1 MAX6699UE -40C to +125C 16 TSSOP U16-1 Notebook Computers See the Slave Address section. 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 EACH 1 16 DXP1 GND 2200pF 2 15 MAX6699 CLK DXN1 SMBCLK DATA 3 14 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.1 2200pF 8 9 DXN4 N.C.2 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.5-Channel Precision Temperature Monitor ABSOLUTE MAXIMUM RATINGS 16-Pin TSSOP V , SCK, SDA, ALERT, OVERT to GND ................-0.3V to +6V CC (derate 9.40mW/C above +70C)..................879.1mW(U20-2) DXP to GND..............................................-0.3V to (V + 0.3V) CC DXN to GND ........................................................-0.3V to +0.8V ESD Protection (all pins, Human Body Model)................2000V Operating Temperature Range .........................-40C to +125C SDA, ALERT, OVERT Current .............................-1mA to +50mA DXN Current .......................................................................1mA Junction Temperature......................................................+150C Storage Temperature Range .............................-60C to +150C Continuous Power Dissipation (T = +70C) A Lead Temperature (soldering, 10s) .................................+300C 16-Pin QSOP (derate 8.30mW/C above +70C) ....................727.3mW(E20-1) 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, T = -40C to +125C, unless otherwise noted. Typical values are at V = +3.3V and T = +25C.) (Note 1) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 5.5 V CC 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 -2.0 +2.0 A o Local Temperature Accuracy V = 3.3V C CC T = 0C to +125C -3.0 +3.0 A Supply Sensitivity of Temperature o 0.2 C/V Accuracy Resistance cancellation on 95 125 156 Remote Channel 1 Conversion t ms CONV1 Time Resistance cancellation off 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 MAX6699