MAX6653/MAX6663/MAX6664 19-2865 Rev 1 12/03 Temperature Monitors and PWM Fan Controllers General Description Features The MAX6653/MAX6663/MAX6664 are ACPI-compliant Remote-Junction Temperature Sensor Within local and remote-junction temperature sensors and fan 1C Accuracy (+60C to +100C) controllers. These devices measure their own die tem- ACPI-Compatible Programmable Temperature perature, as well as the temperature of a remote-PN Alarms junction and control the speed of a DC cooling fan based on the measured temperature. Remote tempera- 0.125C Resolution Local and Remote-Junction ture measurement accuracy is 1C from +60C to Temperature Measurement +100C. Temperature measurement resolution is Programmable Temperature Offset for System 0.125C for both local and remote temperatures. Calibration Internal watchdog set points are provided for both local and remote temperatures. There are two comparison SMBus 2-Wire Serial Interface with Timeout set points for local temperatures and two for remote Automatic or Manual Fan-Speed Control temperatures. When a set point is crossed, the PWM Fan Control Output MAX6653/MAX6663/MAX6664 assert either the INT or THERM outputs. These outputs can be used as inter- Fan-Speed Monitoring and Watchdog rupts, clock throttle signals, or overtemperature shut- Fan Fault and Failure Indicators down signals. Two pins on the MAX6653 control the power-up values of the comparison set points, provid- Compatible with 2-Wire or 3-Wire Fans ing fail-safe protection even when the system is unable (Tachometer Output) to program the trip temperatures. The MAX6653 has +3V to +5.5V Supply Range two additional shutdown outputs, SDR and SDL, that are triggered when the remote or local temperatures Additional Shutdown Set Point (MAX6653) exceed the programmed shutdown set points. The INT Controlled PWM Rise/Fall Times output for the MAX6653/MAX6663 and THERM outputs for the MAX6653/MAX6663/MAX6664 can also function as inputs if either is pulled low to force the fan to full Ordering Information speed, unless this function is masked by the user. PART TEMP RANGE PIN-PACKAGE The MAX6653/MAX6663/MAX6664 are available in MAX6653AEE -40C to +125C 16 QSOP 16-pin QSOP packages and operate over the -40C to +125C temperature range. MAX6663AEE -40C to +125C 16 QSOP MAX6664AEE -40C to +125C 16 QSOP Applications Pin Configurations Personal Computers TOP VIEW Servers PWM OUT 1 16 SMBCLK Workstations TACH/AIN 2 15 SMBDATA Telecom Equipment CRT0 3 14 INT Networking Equipment CRT1 4 MAX6653 13 ADD Test Equipment GND 5 12 SDR Industrial Controls V 6 11 SDL CC THERM 7 10 DXP FAN FAULT 8 9 DXN Typical Operating Circuits appear at end of data sheet. QSOP Functional Diagram appears at end of data sheet. Pin Configurations continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Temperature Monitors and PWM Fan Controllers ABSOLUTE MAXIMUM RATINGS All Voltages Are Referenced to GND DXN Current .......................................................................1mA TACH/AIN..............................................................-0.3V to +5.5V ESD Protection (all pins, Human Body Model) ..................2000V V ...........................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A DXP, ADD, CRIT0, CRIT1........................-0.3V to + (V + 0.3V) 16-Pin QSOP (derate 8.3 mW/C above +70C)..........667mW CC DXN .......................................................................-0.3V to +0.8V Operating Temperature Range .........................-40C to +125C SMBDATA, SMBCLK, INT, THERM, Junction Temperature......................................................+150C FAN FAULT, SDL, SDR............................................-0.3V to +6V Storage Temperature Range .............................-65C to +165C SMBDATA, INT, THERM, FAN FAULT, Lead Temperature (soldering, 10s) .................................+300C PWM OUT Current..............................................-1mA to +50mA 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 = 0C to +125C, unless otherwise noted. Typical values are at V = +3.3V, T = +25C.) (Note1) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage Range V 3.0 5.5 V CC Standby Current SMBDAT = SMBCLK = 1, register 00h = 00h 10 A Operating Current I SMBDAT = SMBCLK = 1 0.5 1 mA S Average Operating Current Conversion rate = 4Hz (default) 150 300 A V = + 3.3V, T = 0 C to + 100 C , C C A 1 + 60C T + 100 C R External Temperature Error C V = +3.3V, 0 C T +100 C3 CC R V = +3.3V, -25C T +125 C4 CC R V = +3.3V, 0 C T +100 C2 CC A Internal Temperature Error C V = +3.3V, -40 C T +125 C4 CC A 0.125 C Temperature Resolution (Internal and External) 11 Bits Fan TACHOMETER Accuracy (Note 2) 6 % Fan TACHOMETER Full-Scale 255 Count Divisor = 1, fan count = 153 4400 Divisor = 2, fan count = 153 2200 TACHOMETER Nominal Input RPM RPM Divisor = 4, fan count = 153 1100 Divisor = 8, fan count = 153 550 Internal Clock Frequency 254 270 286 kHz TACHOMETER Conversion Cycle 637 ms Time 2 MAX6653/MAX6663/MAX6664