EVALUATION KIT AVAILABLE MAX7500MAX7504 Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection General Description Features The MAX7500MAX7504 temperature sensors accurately Timeout Prevents Bus Lockup (MAX7500, MAX7501, measure temperature and provide an overtemperature MAX7502) alarm/interrupt/shutdown output. These devices convert Hardware Reset for Added Protection the temperature measurements to digital form using a 2 I C Bus Interface high-resolution, sigma-delta, analog-to-digital converter 2 3.0V to 5.5V Supply Voltage Range (ADC). Communication is through an I C-compatible 2-wire serial interface. The MAX7500/MAX7501/MAX7502 250A (typ) Operating Supply Current integrate a timeout feature that offers protection against 3A (typ) Shutdown Supply Current 2 I C bus lockups. The MAX7503/MAX7504 do not include 1.5C (max) Temperature Accuracy (-25C to the timeout feature. +100C, 3-) The 2-wire serial interface accepts standard write byte, MAX, SO Packages Save Space read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the Separate Open-Drain OS Output Operates as open-drain overtemperature shutdown output. Interrupt or Comparator/Thermostat Input The MAX7500 features three address select lines, while Register Readback Capability the MAX7501MAX7504 feature two address select lines Improved LM75 Second Source and a RESET input. The MAX7500/MAX7501/MAX7502s 3.0V to 5.5V supply voltage range, low 250A supply 2 Ordering Information/ current, and a lockup-protected I C-compatible interface make them ideal for a wide range of applications, including Selector Guide personal computers (PCs), electronic test equipment, and TEMP PIN- office electronics. PART RESET TIMEOUT RANGE PACKAGE The MAX7500MAX7504 are available in 8-pin MAX -55C to and SO packages and operate over the -55C to +125C MAX7500MSA 8 SO X +125C temperature range. Ordering Information/Selector Guide continued at end of Applications data sheet. PCs Pin Configurations appear at end of data sheet. Servers Office Electronics Electronic Test Equipment Industrial Process Control Typical Application Circuits +3.0V TO +5.5V +3.0V TO +5.5V 4.7k 4.7k +V +V S S SDA SDA A0 A0 2 2 TO I C MASTER SCL TO I C MASTER SCL MAX7501 A1 A1 MAX7502 OS OS MAX7500 A2 MAX7503 GND MAX7504 RESET GND MAX is a registered trademark of Maxim Integrated Products, Inc. 19-3382 Rev 5 11/16MAX7500MAX7504 Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection Absolute Maximum Ratings (Note 1) Operating Temperature Range ......................... -55C to +125C +V to GND .............................................................-0.3V to +6V Junction Temperature ......................................................+150C S OS, SDA, SCL to GND .........................................-0.3V to +6.0V Storage Temperature Range ............................ -65C to +150C All Other Pins to GND ...............................-0.3V to (+V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C S Input Current at Any Pin (Note 2) .......................................+5mA Soldering Temperature (reflow) Package Input Current (Note 2) .......................................+20mA Lead(Pb)-free...............................................................+260C ESD Protection (all pins, Human Body Model, Note 3) ..2000V Containing lead(Pb) .....................................................+240C Continuous Power Dissipation (T = +70C) A 8-Pin MAX (derate 4.5mW/C above +70C) ............362mW 8-Pin SO (derate 5.9mW/C above +70C) .................471mW Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifica- tions do not apply when operating the device beyond its rated operating conditions. Note 2: When the input voltage (V ) at any pin exceeds the power supplies (V < V or V > + V ), the current at that pin should I I GND I S be limited to 5mA. The 20mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5mA to 4. Note 3: Human Body Model, 100pF discharged through a 1.5k resistor. 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 = -55C to +125C, unless otherwise noted. Typical values are at +V = +3.3V, T = +25C.) (Notes 4, 5) S A S A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS -25C T +100C -2.0 2.0 A Accuracy, 6- C -55C T +125C -3.0 3.0 A -25C T +100C -1.5 +1.5 A Accuracy, 3- (Note 5) C -55C T +125C -2.0 +2.0 A Resolution 9 bits Conversion Time (Note 6) 100 ms 2 I C inactive 0.25 0.5 mA Quiescent Supply Current Shutdown mode, +V = 3V 3 S A Shutdown mode, +V = 5V 5 S +V Supply Voltage Range 3.0 5.5 V S OS Output Saturation Voltage I = 4.0mA (Note 7) 0.8 V OUT Conver- OS Delay (Note 8) 1 6 sions T Default Temperature (Note 9) 80 C OS T Default Temperature (Note 9) 75 C HYST LOGIC (SDA, SCL, A0, A1, A2) +V x S Input High Voltage V V IH 0.7 +V x S Input Low Voltage V V IL 0.3 Input High Current I V = 5V 0.005 1.0 A IH IN Input Low Current I V = 0V 0.005 1.0 A IL IN Input Capacitance All digital inputs 5 pF Output High Current V = 5V 1 A IN Output Low Voltage I = 3mA 0.4 V OL Maxim Integrated 2 www.maximintegrated.com