S-5843A Series TEMPERATURE SWITCH IC (THERMOSTAT IC) www.sii-ic.com SII Semiconductor Corporation, 2009-2015 Rev.2.2 01 The S-5843A Series is a temperature switch IC (thermostat IC) which detects the temperature with a temperature accuracy of 2.5C. The output inverts when temperature reaches the detection temperature. The S-5843A Series restores the output voltage when the temperature drops to the level of release temperature. The S-5843A Series operates at the lower power supply voltage of 1.65 V and its current consumption is 4.5 A typ. due to CMOS configuration. A temperature sensor with the negative temperature coefficient, a reference voltage generation circuit, a comparator and a delay circuit are integrated on one chip, and enclosed into the packages SOT-23-5 and SNT-6A. Features Detection temperature: T = +40C to +120C, +1C step, detection accuracy: 2.5C DET Low voltage operation: V = 1.65 V min. DD Low current consumption: I = 4.5 A typ. (Ta = +25C) DD Hysteresis temperature: selectable in 2C, 4C, 10C or 20C Selectable output logic in active or Selectable output form in CMOS or Nch open drain Prevent functions for false detection operation and false release operation Operation temperature range: Ta = 40C to +125C *1 Lead-free, Sn 100%, halogen-free *1. Refer to Product Name Structur for details. Applications Fan control Air conditioning system Mobile phone Game console Various electronic devices Packages SOT-23-5 SNT-6A 1 TEMPERATURE SWITCH IC (THERMOSTAT IC) S-5843A Series Rev.2.2 01 Block Diagrams 1. CMOS output product VDD Temperature + sensor Logic circuit Delay circuit DET (selectable) Reference voltage generation circuit VSS RT Figure 1 2. Nch open drain output product VDD Temperature + Logic circuit sensor Delay circuit DET (selectable) Reference voltage generation circuit VSS RT Figure 2 2