NCT22

NCT22, NCT24 Low Cost Single Trip Point Temperature Sensor The NCT22 and NCT24 are programmable solid state temperature sensors designed to replace mechanical switches in sensing and control applications. Both devices integrate the temperature sensor with a voltage reference and all required detector circuitry. The desired temperature set point is set by the user with a single external resistor. Ambient temperature is sensed and compared to the programmed setpoint. The OUT and OUT outputs are driven to their active state when the measured temperature exceeds the programmed setpoint. The NCT22 has a power supply voltage range of 4.5 V to 18 V while the NCT24 operates over a power supply range of 2.7 V to 4.5 V. Both devices are useable over a temperature range of –40°C to +125°C. Both devices feature low supply current making them suitable for many portable applications. The devices are offered in surface mount packages. Features Temperature Set Point Easily Programs with a Single External Resistor Operates with 2.7 V Power Supply (NCT24) Small SOIC Package Cost Effective Applications Power Supply Over–Temperature Detection Consumer Electronics Fire/Heat Detection UPSs, Amplifiers, Motors CPU Thermal Management in PCs + 9V Battery – RSET Sensor 1 NCT22 7 NC VDD 5 TSET 8 NC 6 OUT 3 NC 4 GND OUT 2 +9 V Sounder CONTROL ASIC ALARM http://onsemi.com MARKING DIAGRAM 8 1 SOIC–8 D SUFFIX CASE 751 8 NCTxx ALYW 1 xx = 22 or 24 A = Assembly Location L = W...