Board Mount Temperature Sensors Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface

Board Mount Temperature Sensors I2C LOCAL +/- 2OC TS

The DS1629 digital thermometer and real-time clock integrates the critical functions of a real-time clock and a temperature sensor in a 150mil 8-pin SO package (DS1629S). Communication to the DS1629 is accomplished through a 2-wire interface. The wide power supply range and minimal power requirement of the DS1629 allow for accurate time/temperature measurements in battery-powered applications. The real-time clock/calendar provides seconds, minutes, hours, day, day of the week, date of the month, month, and year. The end of the month date is automatically adjusted for months with less than 31 days, including corrections for leap years. The real-time clock operates in either a 12- or 24-hour format with AM/PM indicator in 12-hour mode. The user-supplied crystal oscillator frequency is internally divided, as specified by device configuration. An open-drain oscillator output is provided that can be used as the clock input to a microcontroller.The thermometer offers ±2°C accuracy over a -10°C to +85°C range. Thermometer data is read out in 2's complement format with 9 bits of resolution. Higher resolution readings can be calculated using data from the DS1629 counter and slope accumulator registers.The open-drain alarm output of the DS1629 becomes active when either the measured temperature exceeds the programmed over-temperature limit (TH) or the current time reaches the programmed alarm setting. The user can configure which event (time only, temperature only, either, or neither) will generate an alarm condition. For storage of general system data or time/temperature datalogging, the DS1629 provides 32 bytes of SRAM.ApplicationsComputer ServersMedical Devices

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line ('parasite power'), eliminating the need for an external power supply.Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.How to Spatially Index 1-Wire® Sensors Using the MAXREFDES131 and DS18B20 FAQs: DS18B20ApplicationsConsumer ProductsIndustrial SystemsThermally Sensitive SystemsThermometersThermostatic Controls

THERMOSTAT SW, 1A, 120VAC/48VDC, 40DEG;

Board Mount Temperature Sensors Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface

Thermostats Digital Thermometer and Thermostat

Thermostats High-Precision Digital Thermometer and Thermostat

Thermostats Digital Thermometer & RTC/Calendar

Thermostats Digital Thermometer and Memory