MAX16031/MAX16032 19-0870 Rev 4 8/11 EEPROM-Based System Monitors with Nonvolatile Fault Memory General Description Features The MAX16031/MAX16032 EEPROM-configurable sys- Supply Voltage Operating Range of 2.85V to 14V tem monitors feature an integrated 10-bit analog-to- Monitors Up to Eight Voltages (Single-Ended or Pseudo-Differential) with 1% Accuracy digital converter (ADC) designed to monitor voltages, EEPROM-Configurable Limits temperatures, and current in complex systems. These Two Undervoltage and Two Overvoltage EEPROM-configurable devices allow enormous flexibility Two Overtemperature in selecting operating ranges, upper and lower limits, Two Overcurrent fault output configuration, and operating modes with High-Side Current-Sense Amplifier with the capability of storing these values within the device. Overcurrent Output (MAX16031 Only) The MAX16031 monitors up to eight voltages, three Monitors Up to Three Temperatures temperatures (one internal/two external remote temper- (1 Internal/2 Remote) ature diodes), and a single current. The MAX16032 Nonvolatile Fault Memory Stores Fault Conditions monitors up to six voltages and two temperatures (one for Later Retrieval internal/one remote temperature diode). Each of these Two Additional Configurable Fault Outputs monitored parameters is muxed into the ADC and writ- Two Configurable GPIOs ten to its respective register that can be read back 2 SMBus/I C-Compatible Interface with ALERT through the SMBus and JTAG interface. Output and Bus Timeout Function Measured values are compared to the user-config- JTAG Interface urable upper and lower limits. For voltage measure- 7mm x 7mm, 48-Pin TQFN Package ments, there are two undervoltage and two overvoltage limits. For current and temperature, there are two sets Ordering Information of upper limits. Whenever the measured value is out- side its limits, an alert signal is generated to notify the PART TEMP RANGE PIN-PACKAGE processor. Independent outputs are available for over- current, overtemperature, and undervoltage/overvolt- MAX16031ETM+ -40C to +85C 48 TQFN-EP* age that are configured to assert on assigned MAX16032ETM+ -40C to +85C 48 TQFN-EP* channels. There are also undedicated fault outputs that +Denotes a lead(Pb)-free/RoHS-compliant package. are configured to offer a secondary limit for tempera- *EP = Exposed pad. ture, current, or voltage fault or provide a separate overvoltage output. Pin Configuration During a major fault event, such as a system shutdown, the MAX16031/MAX16032 automatically copy the inter- nal ADC registers into the nonvolatile EEPROM registers that then are read back for diagnostic purposes. 48 47 46 45 44 43 42 41 40 39 38 37 The MAX16031/MAX16032 offer additional GPIOs that IN2 1 36 ABP + are used for voltage sequencing, additional fault out- IN3 2 35 GND puts, a manual reset input, or read/write logic levels. A IN4 3 34 DBP separate current-sense amplifier with an independent N.C. 4 33 TDO output allows for fast shutoff during overcurrent condi- N.C. 5 32 N.C. tions. The MAX16031/MAX16032 are available in a N.C. 6 31 N.C. MAX16031 7mm x 7mm TQFN package and are fully specified MAX16032 N.C. 7 30 N.C. from -40C to +85C. GND 8 29 TDI Applications IN5 9 28 TCK IN6 10 27 TMS Servers Workstations N.C. (IN7) 11 26 RESET EP Storage Systems Networking N.C. (IN8) 12 25 FAULT1 13 14 15 16 17 18 19 20 21 22 23 24 Telecom ( ) MAX16031 ONLY TQFN 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. EVALUATION KIT AVAILABLE GND IN1 GPIO1 N.C. GPIO2 DXP1 RBP DXN1 SDA N.C. (DXP2) SCL N.C. (DXN2) A0 N.C. (CS+) A1 N.C. (CS-) ALERT N.C. OVERT N.C. N.C. (OVERC) V CC FAULT2 V CCEEPROM-Based System Monitors with Nonvolatile Fault Memory Selector Guide VOLTAGE MONITORS TEMPERATURE SENSORS CURRENT- FAULT PART GPIOs SENSE AMPS OUTPUTS SINGLE ENDED DIFFERENTIAL INT EXT MAX16031ETM+ 8 4 1 2 1 4 2 MAX16032ETM+ 6 3 1 1 4 2 Typical Application Circuit 5V 5V DC-DC EN 1.5V 1.5V DC-DC 3.3V 3.3V DC-DC EN 1.2V 1.2V 12V BUS DC-DC 2.5V 2.5V DC-DC EN 0.9V 0.9V LINEAR 1.8V 1.8V DC-DC EN 3.3V AUX CS+ CS- IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 V ALERT INT CC 1F SCL SCL C SDA SDA GPIO1 RESET DXP1 RESET SYSTEM RESET MAX16031 FAULT1 FAULT2 DXN1 DXP2 OVERT TO FAN CONTROL OVERC WARNING INDICATORS DXN2 GPIO2 ABP DBP RBP GND A0 A1 TMS TCK TDI TDO 1F 1F 2.2F MANUAL RESET SWITCH TMS TCK SYSTEM JTAG TO OTHER HEADER JTAG DEVICES TDI TDO 2 MAX16031/MAX16032