MAX31782 19-5327 Rev 2 1/12 System Management Microcontroller General Description Features The MAX31782 provides a complete solution for the S MAXQ20, High-Performance, 16-Bit C monitoring and controlling of complex system physical S Efficient C-Language Programming health characteristics based on a high-performance, S 36KWords Total Program Memory MAXQ20, 16-bit microcontroller core with generous 32KWords Flash Program Memory amounts of flash program/data and RAM data memory. 4KWords ROM Program Memory I/O resources include an accurate measurement sys- S 1KWords Data RAM tem for temperature and voltage, PWM outputs, timer S 12-Bit ADC with 7-Input Mux for Temperature and inputs, and GPIO to support monitoring and controlling critical system parameters such as temperature, volt- Voltage Monitoring age, fan speed, and chassis intrusion. Direct connection S Temperature Measurement Analog Front-End of diode-connected transistors used as remote tem- 0.125NC Resolution perature sensors is supported as well as expansion to a Diode Series Resistance Cancellation virtually unlimited number of external digital temperature S Six Timer/Fan Tachometer Inputs 2 sensor ICs using the on-chip master I C interface. An 2 S Six 16-Bit PWM Outputs for Fan Speed or D/A independent slave I C interface facilitates communica- Applications tion to a host microprocessor in addition to password- protected in-system reprogramming of the on-chip flash. S 5-Bit GPIO Ports Ease of development is supported with highly versatile 2 S SMBus/I C-Compatible Slave Interface for Host C-compilers and development software that programs Communication with Password-Protected Flash flash and performs in-circuit debug through the inte- Programming grated JTAG interface and associated hardware. 2 S I C-Compatible Master Interface for Slave All these features combined make the device a highly Expansion flexible platform, allowing the designer to easily create a S Power-On Reset and Brownout Monitors customized complex system management solution. S JTAG Port Supports In-System Debug and Flash Programming Applications S Internal Oscillator Requires No Crystal Network Switches/Routers S 2.7V to 5.5V Operating Voltage Range Base Stations Servers Ordering Information Smart Grid Network Systems PART TEMP RANGE PIN-PACKAGE MAX31782ETL+ 40 TQFN-EP* -40NC to +85NC MAX31782ETL+T -40NC to +85NC 40 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. Typical Operating Circuit appears at end of data sheet. T = Tape and reel. *EP = Exposed pad. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata. 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.System Management Microcontroller ABSOLUTE MAXIMUM RATINGS V to V ...........................................................-0.5V to +5.5V Operating Temperature Range .......................... -40NC to +85NC DD SS ADxN to V .........................................................-0.3V to +0.3V Storage Temperature Range ............................ -55NC to +125NC SS All Other Pins to V except Lead Temperature (soldering, 10s) ................................+300NC SS REG18 and REG25 ..............................-0.5V to (V + 0.5V)* Soldering Temperature (reflow) ......................................+260NC DD SCL, SDA, MSDA, MSCL, P6.0P6.4 Continuous Power Dissipation (T = +70NC) A Continuous Sink Current .................... 20mA each, 50mA total TQFN (derate 35.7mW/NC above +70NC)...............2857.1mW P6.0P6.4 Continuous Source Current ...20mA each, 50mA total *Subject to not exceeding +5.5V. 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. RECOMMENDED OPERATING CONDITIONS (T = -40NC to +85NC, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V Operating Voltage Range V (Note 1) 2.7 5.5 V DD DD 0.7 x V + DD Input Logic 1 V V IH V 0.3 DD 0.3 x Input Logic 0 V 0 V IL V DD V + DD 2.1 2.7V P V P 3.6V (Note 1) DD 0.3 Input Logic-High: SCL, SDA, V V I2C IH MSDA, MSCL 0.7 x V + DD 3.6V P V P 5.5V DD V 0.3 DD 0 0.8 2.7V P V P 3.6V (Note 1) DD Input Logic-Low: SCL, SDA, V V I2C IL 0.3 x MSDA, MSCL 3.6V P V P 5.5V 0 DD V DD DC ELECTRICAL CHARACTERISTICS (V = 2.7V to 5.5V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = 3.3V, T = +25NC, unless otherwise DD A DD A noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS I Assuming 100% CPU duty cycle (Note 2) 1.73 2.34 mA CPU Supply Current I (Note 2) 830 1250 A STOP I 7 mA PROGRAM Brownout Voltage V Monitors V (Note 1) 2.40 2.46 2.55 V BO DD Brownout Hysteresis V Monitors V (Note 1) 30 mV BOH DD Internal System Clock f 4.0 MHz MOSC Initial tolerance, T = +25NC, V = 5.5V -1 +1 A DD System Clock Error (Note 3) f +25NC P T P +85NC -2 +1 % ERR:MOSC A -40NC P T P +25NC -5.5 +0.6 A 2 MAX31782