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Seiko Instruments Electronic Components Datasheet


S-5844A

TEMPERATURE SWITCH IC


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S-5844A pdf
S-5844A Series
www.sii-ic.com
© Seiko Instruments Inc., 2011-2014
TEMPERATURE SWITCH IC (THERMOSTAT IC)
Rev.2.6_00
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
CMOS configuration.
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).
Features
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
Applications
Fan control
Air conditioning system
Mobile phone
Game console
Various electronic devices
Packages
SOT-23-5
SNT-4A
HSNT-4 (1010)
Seiko Instruments Inc.
1



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S-5844A pdf
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5844A Series
Block Diagrams
1. CMOS output product
VDD
Temperature
sensor
+ Logic circuit
(selectable)
Reference voltage
generation circuit
TEST
2. Nch open-drain output product
VDD
Figure 1
VSS
Temperature
sensor
+ Logic circuit
(selectable)
Reference voltage
generation circuit
TEST
Figure 2
VSS
Rev.2.6_00
DET
DET
2 Seiko Instruments Inc.



Part Number S-5844A
Description TEMPERATURE SWITCH IC
Maker Seiko Instruments Semiconductor - Seiko Instruments Semiconductor
Total Page 28 Pages
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