DS1621S Digital Thermometer And Thermostat For Board-Level Sensing

DS1621S is a practical temperature monitor for embedded systems that need simple sensing plus optional thermostat control. It measures temperature from -55°C to +125°C in 0.5°C increments, so you can set clear thresholds for fans, heaters, or shutdown logic without analog calibration work. DS1621S communicates over a two-wire serial interface and stores thermostat settings in nonvolatile memory, which helps when products must keep limits after power loss. This part is commonly used in power supplies, industrial controllers, and instrumentation where board temperature is a key reliability driver. Place DS1621S away from hot spots you don’t intend to measure, and use solid copper under the package to couple it to the intended thermal mass. Avoid routing high-current traces near the sensor pins to reduce noise pickup. Request a quote for DS1621S.