DS75LV Digital Thermometer and Thermostat General Description Benefits and Features The DS75LV low-voltage (1.7V to 3.7V) digital thermometer Extend Performance Range with Low-Voltage, and thermostat provides 9, 10, 11, or 12-bit digital temperature 1.7V to 3.7V Operating Range readings over a -55C to +125C range with 2C accuracy Maximize System Accuracy in Broad Range of over a -25C to +100C range. At power-up, the DS75LV Thermal Management Applications defaults to 9-bit resolution for software compatibility with the Measures Temperature from -55C to +125C LM75. Communication with the DS75LV is achieved through (-67F to +257F) a simple 2-wire serial interface. 2C Accuracy over a -25C to 100C Range The DS75LV thermostat has a dedicated open-drain output User-Configurable Resolution from 9 Bits (Default) to 12 Bits (0.5C to 0.0625C) (OS) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that Easy Upgrade to LM75: Pin and Software Compatible must occur before OS is activated. There are two thermostatic Simplify Distributed Temperature-Sensing operating modes that control thermostat operation based on Applications with Multidrop Capability user-defined trip-points (T and T ). OS HYST Up to Eight DS75LVs Can Operate on 2-Wire Bus Applications Increase Reliability and System Robustness Internally Filtered Data Lines for Noise Immunity Personal Computers (50ns Deglitch) Cellular Base Stations Bus Timeout Feature Prevents Lockup on 2-Wire Office Equipment Interface Any Thermally Sensitive System Minimize Power Consumption with Built-In Shutdown Mode Ordering Information appears at end of data sheet. Flexible User-Defined Thermostatic Modes with Programmable Fault Tolerance Functional Block Diagram PRECISION OVERSAMPLING DIGITAL REFERENCE MODULATOR DECIMATOR VDD CONFIGURATION REGISTER SCL SDA ADDRESS TEMPERATURE AND A0 REGISTER I/O CONTROL R P A1 OS A2 TOS AND THYST THERMOSTAT REGISTERS COMPARATOR GND DS75LV 19-7469 Rev 5 11/16DS75LV Digital Thermometer and Thermostat Absolute Maximum Ratings Voltage on V , Relative to Ground ....................-0.3V to +4.0V Storage Temperature Range ............................ -55C to +125C DD Voltage on Any Other Pin, Relative to Ground ....-0.3V to +6.0V Lead Temperature (soldering, 10s) .................................+260C Operating Temperature Range ......................... -55C to +125C 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. DC Electrical Characteristics (1.7V V 3.7V, T = -55C to +125C, unless otherwise noted.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 1.7 3.7 V DD 0 to +50 0.5 Thermometer Error (Note 1) T -25 to +100 2.0 C ERR -55 to +125 3.0 Input Logic-High V (Note 2) 0.7 x V 5.5 V IH DD Input Logic-Low V (Note 2) -0.5 0.3 x V V IL DD V 3mA sink current 0 0.4 SDA Output Logic Low Voltage OL1 V (Note 2) V 6mA sink current 0 0.6 OL2 OS Saturation Voltage V 4mA sink current (Notes 1, 2) 0.8 V OL Input Current Each I/O Pin 0.4 < V < 0.9 x V -10 +10 A I/O DD I/O Capacitance C 10 pF I/O Standby Current I (Notes 3, 4) 2 A DD1 Active temp conversions 1000 Active Current (Notes 3, 4) I A DD Communication only 100 AC Electrical Characteristics (1.7V V 3.7V, T = -55C to +125C, unless otherwise noted.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Resolution 9 12 Bits 9-bit conversions 25 10-bit conversions 50 Temperature Conversion Time t ms CONVT 11-bit conversions 100 12-bit conversions 200 SCL Frequency f 400 kHz SCL Bus Free Time Between a t (Note 5) 1.3 s BUF STOP and START Condition START and Repeated START t (Notes 5, 6) 600 ns HD:STA Hold Time from Falling SCL Maxim Integrated 2 www.maximintegrated.com