MAX6694 19-4097 Rev 0 4/08 5-Channel Precision Temperature Monitor with Beta Compensation General Description Features The MAX6694 precision multichannel temperature sen- Four Thermal-Diode Inputs sor monitors its own temperature and the temperatures Beta Compensation (Channel 1) of up to four external diode-connected transistors. All Local Temperature Sensor temperature channels have programmable alert thresh- olds. Channels 1 and 4 also have programmable 1.5C Remote Temperature Accuracy (+60C to overtemperature thresholds. When the measured tem- +100C) perature of a channel exceeds the respective thresh- Temperature Monitoring Begins at POR for Fail- old, a status bit is set in one of the status registers. Two Safe System Protection open-drain outputs, OVERT and ALERT, assert corre- sponding to these bits in the status register. ALERT and OVERT Outputs for Interrupts, The 2-wire serial interface supports the standard system Throttling, and Shutdown management bus (SMBus) protocols: write byte, read STBY Input for Hardware Standby Mode byte, send byte, and receive byte for reading the tem- Small, 16-Pin TSSOP and TQFN Packages perature data and programming the alarm thresholds. 2-Wire SMBus Interface The MAX6694 is specified for a -40C to +125C oper- ating temperature range and is available in 16-pin TSSOP and 5mm x 5mm thin QFN packages. Applications Ordering Information Desktop Computers PART TEMP RANGE PIN-PACKAGE Notebook Computers MAX6694UE9A+ -40C to +125C 16 TSSOP MAX6694TE9A+ -40C to +125C 16 TQFN-EP* Workstations +Denotes a lead-free package. Servers *EP = Exposed pad. Note: Slave address is 1001 101. SMBus is a trademark of Intel Corp. Pin Configurations appear at end of data sheet. Typical Application Circuit +3.3V CPU 4.7k EACH 1 16 DXP1 GND 100pF 2 15 CLK DXN1 SMBCLK 3 MAX6694 14 DATA DXP2 SMBDATA 100pF INTERRUPT 4 13 DXN2 ALERT TO P 5 12 DXP3 V CC 0.1F 100pF 6 11 DXN3 OVERT TO SYSTEM 7 10 DXP4 N.C. SHUTDOWN 100pF 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.5-Channel Precision Temperature Monitor with Beta Compensation ABSOLUTE MAXIMUM RATINGS V , SMBCLK, SMBDATA, ALERT, OVERT, Junction-to-Case Thermal Resistance ( ) (Note 1) CC JC 16-Pin TQFN...................................................................2C/W STBY to GND ....................................................-0.3V to +6.0V DXP to GND..............................................-0.3V to (V + 0.3V) 16-Pin TSSOP...............................................................27C/W CC Junction-to-Ambient Thermal Resistance ( ) (Note 1) DXN to GND ........................................................-0.3V to +0.8V JA 16-Pin TQFN.................................................................30C/W SMBDATA, ALERT, OVERT Current....................-1mA to +50mA DXIV Current.....................................................................1mA 16-Pin TSSOP...............................................................90C/W ESD Protection (all pins, Human Body Model) ....................2kV Continuous Power Dissipation (T = +70C) A 16-Pin TQFN, 5mm x 5mm Operating Temperature Range .........................-40C to +125C Junction Temperature......................................................+150C (derate 33.3mW/C above +70C)............................2666.7mW Storage Temperature Range .............................-65C to +150C 16-Pin TSSOP (derate 11.1mW/C above +70C) ............................888.9mW Lead Temperature (soldering, 10s) .................................+300C Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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 +3.6V, 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 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 3.6 V CC Software Standby Supply Current I SMBus static 3 10 A SS Operating Current I During conversion (Note 3) 500 2000 A CC Channel 1 only 11 Temperature Resolution Bits Other diode channels 8 T = T = +60C to +100C -1.5 +1.5 A RJ 3 Temperature Accuracy V = 3.3V, CC C (Remote Channel 1) = 0.5 T = T = 0C to +125C -2.375 +2.375 A RJ T = T = +60C to +100C -2 +2 3 Temperature Accuracy A RJ V = 3.3V C CC (Remote Channels 26) T = T = 0C to +125C -2.5 +2.5 A RJ T = +60C to +100C -2 +2 3 Temperature Accuracy A V = 3.3V C CC (Local) T = 0C to +125C -2.5 +2.5 A T = T = +60C to +100C -3 +3 A RJ 6 Temperature Accuracy V = 3.3V, CC C (Remote Channel 1) = 0.5 T = T = 0C to +125C -4 +4 A RJ T = T = +60C to +100C -3 +3 6 Temperature Accuracy A RJ V = 3.3V C CC (Remote Channels 26) T = T = 0C to +125C -3.5 +3.5 A RJ T = +60C to +100C -2.5 +2.5 6 Temperature Accuracy A V = 3.3V C CC (Local) T = 0C to +125C -3 +3 A Supply Sensitivity of Temperature o 0.2 C/V Accuracy Rem ote Ch annel 1 Conv ersi on Tim et 190 250 312 ms CONV1 Remote Channels 2, 3, 4 t 95 125 156 ms CONV Conversion Time 2 MAX6694