© Seiko Instruments Inc., 2009-2015
TEMPERATURE SWITCH IC (THERMOSTAT IC)
The S-5843A Series is a temperature switch IC (thermostat IC) which detects the temperature with a temperature accuracy of
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 μA typ. due to
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.
• Detection temperature:
TDET = +40°C to +120°C, +1°C step, detection accuracy: ±2.5°C
• Low voltage operation:
VDD = 1.65 V min.
• Low current consumption:
IDD = 4.5 μA typ. (Ta = +25°C)
• Hysteresis temperature:
selectable in 2°C, 4°C, 10°C or 20°C
• Selectable output logic in active "H" or "L"
• Selectable output form in CMOS or Nch open drain
• Prevent functions for false detection operation and false release operation
• Operation temperature range:
• Lead-free, Sn 100%, halogen-free*1
Ta = −40°C to +125°C
*1. Refer to " Product Name Structure" for details.
• Fan control
• Air conditioning system
• Mobile phone
• Game console
• Various electronic devices
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