MAX6622 19-3003 Rev 0 12/07 5-Channel Precision Temperature Monitor General Description Features Four Thermal-Diode Inputs The MAX6622 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 Penryn CPU-Compatible byte, send byte, and receive byte for reading the tem- Pin- and Register-Compatible with MAX6602 perature data and programming the alarm thresholds. The MAX6622 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 MAX6622UE9A+ 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 EACH 1 16 DXP1 GND 2200pF 2 15 CLK DXN1 SMBCLK DATA 3 MAX6622 14 DXP2 SMBDATA 2200pF INTERRUPT 4 13 DXN2 ALERT TO P 5 12 DXP3 V CC 0.1F 2200pF 6 11 DXN3 OVERT TO SYSTEM 7 10 DXP4 N.C. SHUTDOWN 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.5-Channel Precision Temperature Monitor ABSOLUTE MAXIMUM RATINGS V , SMBCLK, SMBDATA, ALERT, OVERT, Junction-to-Case Thermal Resistance ( ) (Note A) CC JC 16-Pin TSSOP ..............................................................27C/W STBY to GND .......................................................-0.3V to +6V DXP to GND..............................................-0.3V to (V + 0.3V) Junction-to-Ambient Thermal Resistance ( ) (Note A) JA CC 16-Pin TSSOP...............................................................90C/W DXN2, DXN3, DXN4 to GND .................................-0.3V to +0.8V ESD Protection (all pins, Human Body Model)................2000V SMBDATA, ALERT, OVERT Current....................-1mA to +50mA DXN Current .......................................................................1mA Operating Temperature Range .........................-40C to +125C Junction Temperature......................................................+150C Continuous Power Dissipation (T = +70C) A 16-Pin TSSOP Storage Temperature Range .............................-60C to +150C Lead Temperature (soldering, 10s) .................................+300C (derate 11.1mW/C above +70C)..............................888.9mW Note A: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer board. For detailed information on package thermal considerations, refer to Application Note 4083 available at 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 +5.5V, V = V , T = -40C to +125C, unless otherwise noted. Typical values are at V = +3.3V and CC STBY CC A CC T = +25C.) (Note 1) A 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 o Remote Temperature Accuracy V = 3.3V C CC T = T = 0C to +125C -3.0 +3.0 A RJ T = +60C to +100C -4.4 -0.4 A o Local Temperature Accuracy V = 3.3V C CC T = 0C to +125C -6.1 -0.1 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 MAX6622