MAX6657/MAX6658/MAX6659 19-2034 Rev 5 10/10 1C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms General Description Features The MAX6657/MAX6658/MAX6659 are precise, two- Dual Channel Measures Remote and Local channel digital temperature sensors. Each accurately Temperature measures the temperature of its own die and one 11-Bit, +0.125C Resolution remote PN junction, and reports the temperature in digi- High Accuracy 1C (max) from +60C to +100C tal form on a 2-wire serial interface. The remote junction (Remote) can be a diode-connected transistor like the low-cost NPN type 2N3904 or 2N3906 PNP type. The remote No Calibration Required junction can also be a common-collector PNP, such as Programmable Under/Overtemperature Alarms a substrate PNP of a microprocessor. Programmable Conversion Rate The 2-wire serial interface accepts standard System (0.0625Hz to 16Hz) Management Bus (SMBus) commands such as Write 2 Byte, Read Byte, Send Byte, and Receive Byte to read SMBus/I C-Compatible Interface the temperature data and program the alarm thresholds Two Alarm Outputs: ALERT and OVERT1 and conversion rate. The MAX6657/MAX6658/ (MAX6657 and MAX6658) MAX6659 can function autonomously with a program- mable conversion rate, which allows the control of sup- Three Alarm Outputs: ALERT, OVERT1, ply current and temperature update rate to match and OVERT2 (MAX6659) system needs. For conversion rates of 4Hz or less, the Compatible with 65nm Process Technology temperature is represented in extended mode as 10 (Y Versions) bits + sign with a resolution of 0.125C. When the con- version rate is faster than 4Hz, output data is 7 bits + Ordering Information sign with a resolution of 1C. The MAX6657/ MAX6658/MAX6659 also include an SMBus timeout MEASURED TEMP PART PIN-PACKAGE RANGE feature to enhance system reliability. Remote accuracy is 1C between +60C and +100C MAX6657MSA 0C to +125C 8 SO with no calibration needed. The MAX6657 measures MAX6657MSA+ 0C to +125C 8 SO temperatures from 0C to +125C and the MAX6658/ MAX6657MSA-T 0C to +125C 8 SO MAX6659 from -55C to +125C. The MAX6659 has the MAX6657MSA+T 0C to +125C 8 SO added benefit of being able to select one of three MAX6657YMSA+ 0C to +125C 8 SO addresses through an address pin, and a second over- temperature alarm pin for greater system reliability. MAX6657YMSA+T 0C to +125C 8 SO Note: All devices are specified over the -55C to +125C oper- Applications ating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. Desktop Computers Workstations T = Tape and reel. Notebook Computers Ordering Information continued at end of data sheet. Servers Pin Configurations TOP VIEW V 1 16 N.C. CC Typical Operating Circuit appears at the end of the data N.C. 2 15 STBY sheet. V 1 8 SMBCLK CC DXP 3 14 SMBCLK DXP 2 7 SMBDATA DXN 4 MAX6659 13 N.C. MAX6657 MAX6658 DXN 3 6 ALERT ADD 5 12 SMBDATA OVERT1 6 11 N.C. OVERT1 4 5 GND GND 7 10 OVERT2 SO GND 8 9 ALERT QSOP SMBus is a trademark of Intel Corp. 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.1C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A V ..........................................................................-0.3V to +6V 8-Pin SO (derate 5.9mW/C above +70C) .................471mW CC DXP ............................................................-0.3V to (V + 0.3V) 16-Pin QSOP (derate 8.3mW/C above +70C) ..........664mW CC DXN ......................................................................-0.3V to +0.8V Junction Temperature .....................................................+150C SMBCLK, SMBDATA, ALERT, OVERT1, Storage Temperature Range ............................-65C to +150C OVERT2 ..............................................................-0.3V to +6V Lead Temperature (soldering, 10s) ................................+300C SMBDATA, ALERT, OVERT1, OVERT2 Soldering Temperature (reflow) Current ..........................................................-1mA to +50mA Lead(Pb)-free ..............................................................+260C DXN Current ......................................................................1mA Containing lead(Pb) ....................................................+240C 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 specified. Typical values are at V = +3.3V and T = +25C.) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 1C Temperature Resolution, Legacy Mode 8 Bits 0.125 C Temperature Resolution, Extended Mode 11 Bits T = +60C to +100C, V = +3.3V RJ CC -1.0 +1.0 (Note 1) Remote Temperature Error C (MAX6657, MAX6657Y) T = 0C to +100C, V = +3.3V (Note 1) -3.0 +3.0 RJ CC T = 0C to +125C, V = +3.3V (Note 1) -5.0 +5.0 RJ CC T = +60C to +100C, V = +3.3V -2.0 +2.0 A CC Local Temperature Error T = 0C to +100C, V = +3.3V -3.0 +3.0 C A CC (MAX6657) T = 0C to +125C, V = +3.3V -5.0 +5.0 A CC T = +60C to +100C, V = +3.3V RJ CC -1.0 1.0 Remote Temperature Error (Note 1) (MAX6658/MAX6659/ C T = 0C to +100C, V = +3.3V (Note 1) -3.0 3.0 RJ CC MAX6658Y/MAX6659Y) T = -55C to +125C, V = +3.3V (Note 1) -5.0 +5.0 RJ CC T = +60C to +100C, V = +3.3V -2.0 +2.0 A CC Local Temperature Error T = 0C to +100C, V = +3.3V -3.0 +3.0 C A CC (MAX6658/MAX6659) T = -55C to +125C, V = +3.3V (Note 2) -5.0 +5.0 A CC T = +60C to +100C, V = +3.3V -3.8 A CC Local Temperature Error T = 0C to +100C, V = +3.3V -4.0 C A CC (MAX665 Y) T = 0C to +125C, V = +3.3V -4.4 A CC Line Regulation 3.0V V 5.5V 0.2 0.6 mC/V CC Supply Voltage Range V 3.0 5.5 V CC Undervoltage Lockout Threshold UVLO Falling edge of V disables ADC 2.60 2.80 2.95 V CC Undervoltage Lockout Hysteresis 90 mV Power-On Reset (POR) Threshold V , falling edge 1.5 2.0 2.5 V CC POR Threshold Hysteresis 90 mV Standby Supply Current SMBus static 3 10 A Operating Current During conversion 0.5 1.0 mA 2 MAX6657/MAX6658/MAX6659