© Seiko Instruments Inc., 2011-2014
TEMPERATURE SWITCH IC (THERMOSTAT IC)
The S-5844A Series is a temperature switch IC (thermostat IC) which detects the temperature with a temperature accuracy of
±2.5°C. The output inverts when temperature reaches the detection temperature. The S-5844A Series restores the output
voltage when the temperature drops to the level of release temperature.
The S-5844A Series operates at the lower power supply voltage of 1.65 V and its current consumption is 0.18 μA typ. due to
A temperature sensor with the negative temperature coefficient, a reference voltage generation circuit and a comparator are
integrated on one chip, and enclosed into the packages SOT-23-5 and SNT-4A, and the super-small package HSNT-4 (1010).
• Detection temperature:
TDET = +50°C to +100°C, +5°C step, detection accuracy: ±2.5°C
• Low voltage operation:
VDD = 1.65 V min.
• Low current consumption:
IDD = 0.18 μA typ. (Ta = +25°C)
• Hysteresis temperature:
selectable in 5°C, 10°C, 15°C or 20°C
• Selectable output logic in active "H" or active "L"
• Selectable output form in CMOS or Nch open-drain
• Operation temperature range:
Ta = −40°C to +125°C
• Lead-free (Sn 100%), halogen-free
• Fan control
• Air conditioning system
• Mobile phone
• Game console
• Various electronic devices
• HSNT-4 (1010)
Seiko Instruments Inc.