Microchip Technology’s MCP9503 device is temperature switch with ±1°C (typical) accurate factory set output thresholds. These devices are ideal for high power supply systems where an overtemperature protection circuit is needed. These devices do not require external components, consume 25 µA (typical), and the factory set thresholds provide simplicity. In addition, this family of devices provide user selectable 2°C and 10°C (typical) switch hysteresis, and various output configurations. The MCP9501/2 outputs switch for rising temperatures while the MCP9503/4 switch for falling temperature, with the relative hysteresis at the set thresholds. This family of devices is also available with Active-High Push-Pull and Active-Low Open-Drain outputs, the MCP9502/4 and the MCP9501/3, respectively. The Push-Pull output is ideal for a microcontroller interface while the Open-Drain output can be used for level shifting, wiredOR configuration, or as a heater on/off switch. The MCP9501/2/3/4 operate from 2.7V to 5.5V supply. This family is available with space saving 5-lead SOT-23 package.