S-5843A Series
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© Seiko Instruments Inc., 2009-2015
TEMPERATURE SWITCH IC (THERMOSTAT IC)
Rev.2.2
_00
The S-5843A 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-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
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
DET
=
+40°C
to
+120°C, +1°C
step, detection accuracy:
±2.5°C
Low voltage operation:
V
DD
= 1.65 V min.
Low current consumption:
I
DD
= 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:
Ta =
−40°C
to
+125°C
*1
Lead-free, Sn 100%, halogen-free
*1.
Refer to "
Product Name Structure"
for details.
Applications
•
•
•
•
•
Fan control
Air conditioning system
Mobile phone
Game console
Various electronic devices
Packages
•
•
SOT-23-5
SNT-6A
Seiko Instruments Inc.
1
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5843A Series
Block Diagrams
1. CMOS output product
VDD
Rev.2.2
_00
Temperature
sensor
+
−
Delay circuit
Logic circuit
(selectable)
DET
Reference voltage
generation circuit
VSS
RT
Figure 1
2. Nch open drain output product
VDD
Temperature
sensor
+
−
Delay circuit
Logic circuit
(selectable)
DET
Reference voltage
generation circuit
VSS
RT
Figure 2
2
Seiko Instruments Inc.
Rev.2.2
_00
Product Name Structure
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5843A Series
Users are able to select the detection temperature, output form and logic, hysteresis temperature and package for the
S-5843A Series.
1. Product name
1. 1
SOT-23-5
x
x
-
M5T1
x
Environmental code
U:
Lead-free (Sn 100%), halogen-free
S:
Lead-free, halogen-free
Package abbreviation and IC packing specifications
M5T1: SOT-23-5, Tape
Hysteresis temperature
*2
A:
2°C
B:
4°C
C:
10°C
D:
20°C
Output form and output logic
*3
A:
CMOS output, active "H"
B:
CMOS output, active "L"
C:
Nch open drain output, active "H"
D:
Nch open drain output, active "L"
Detection temperature (T
DET
)
*4
40 to 99, A0 to A9, B0 to B9, C0
1. 2
SNT-6A
x
x
-
I6T1
U
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications
I6T1: SNT-6A, Tape
Hysteresis temperature
*2
A:
2°C
B:
4°C
C:
10°C
D:
20°C
Output form and output logic
*3
A:
CMOS output, active "H"
B:
CMOS output, active "L"
C:
Nch open drain output, active "H"
D:
Nch open drain output, active "L"
Detection temperature (T
DET
)
40 to 99, A0 to A9, B0 to B9, C0
*1.
Refer to the tape drawing.
*2.
Hysteresis temperature is selectable in 2°C, 4°C, 10°C or 20°C.
However, if the detection temperature is
+40°C
to
+49°C,
select hysteresis temperature in 2°C, 4°C or 10°C.
*3.
The DET pin output can be selected the output logic in active "H" or "L".
The DET pin output can be selected the output form CMOS or Nch open drain.
*4.
Detection temperature (T
DET
) can be set in the range of
+40°C
to
+120°C
at 1°C step.
40 to 99, when detection temperature is
+40°C
to
+99°C
A0 to A9, when detection temperature is
+100°C
to
+109°C
B0 to B9, when detection temperature is
+110°C
to
+119°C
C0, when the detection temperature is
+120°C
*4
*1
*1
S-5843A xx
S-5843A xx
Seiko Instruments Inc.
3
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5843A Series
Rev.2.2
_00
2. Packages
Table 1
Package Name
SOT-23-5
SNT-6A
Dimension
MP005-A-P-SD
PG006-A-P-SD
Package Drawing Codes
Tape
MP005-A-C-SD
PG006-A-C-SD
Reel
MP005-A-R-SD
PG006-A-R-SD
Land
−
PG006-A-L-SD
3. Product name list
3. 1
SOT-23-5
Table 2
Product Name
Detection
DET Pin Output Form DET Pin Output Logic
Temperature (T
DET
)
Hysteresis
Temperature (T
HYS
)
10°C
S-5843AC0DC-M5T1y
+120°C
Nch open drain
Active "L"
Remark 1.
Please contact our sales office for products with specifications other than the above.
2.
y: S or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
3. 2
SNT-6A
Table 3
Product Name
Detection
DET Pin Output Form DET Pin Output Logic
Temperature (T
DET
)
Hysteresis
Temperature (T
HYS
)
10°C
10°C
S-5843A80CC-I6T1U
+80°C
Nch open drain
Active "H"
S-5843A90CC-I6T1U
+90°C
Nch open drain
Active "H"
Remark
Please contact our sales office for products with specifications other than the above.
4
Seiko Instruments Inc.
Rev.2.2
_00
Pin Configurations
1. SOT-23-5
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5843A Series
Table 4
Top view
5
4
1 2 3
Figure 3
Symbol
Description
*1
NC
1
No connection
2
VSS
GND pin
*2
RT
3
Test pin
4
VDD
Power supply pin
5
DET
Output pin
*1.
The NC pin is electrically open.
The NC pin can be connected to VDD pin or VSS pin.
*2.
Set the RT pin open in use.
Pin No.
2. SNT-6A
Table 5
Pin No.
Top view
1
2
3
6
5
4
Figure 4
*1.
*2.
1
2
3
4
5
6
Symbol
RT
*1
VSS
NC
*2
DET
NC
*2
VDD
Description
Test pin
GND pin
No connection
Output pin
No connection
Power supply pin
Set the RT pin open in use.
The NC pin is electrically open.
The NC pin can be connected to VDD pin or VSS pin.
Seiko Instruments Inc.
5
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