S-5841 Series
www.sii-ic.com
© Seiko Instruments Inc., 2007-2012
TEMPERATURE SWITCH IC (THERMOSTAT IC)
Rev.2.1
_00
The S-5841 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-5841 Series restores the output
voltage when the temperature drops to the level of release temperature.
The S-5841 Series operates at the lower power supply voltage of 2.2 V and its current consumption is 10
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:
Low voltage operation:
T
DET
=
+40°C
to
+100°C, +1°C
step, detection accuracy:
±2.5°C
V
DD
= 2.2 V min.
(Detection temperature =
+55°C
to
+100°C,
Ta =
−40°C
to
+100°C)
Low current consumption:
I
DD
= 10
μA
typ. (Ta =
+25°C)
Hysteresis temperature can be switched in 0°C, 2°C, 4°C and 10°C.
Selectable output logic in active "H" or "L"
Selectable output form in CMOS or Nch open drain
Operation temperature range:
Ta =
−40°C
to
+125°C
*1
Lead-free, Sn 100%, halogen-free
Product Name Structure"
for details.
*1.
Refer to "
Applications
•
•
•
Fan control
Air conditioning system
Various electronic devices
Packages
•
•
SOT-23-5
SNT-6A
Seiko Instruments Inc.
1
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5841 Series
Block Diagrams
1. CMOS output product
VDD
Rev.2.1
_00
Temperature
sensor
+
−
Delay circuit
Logic circuit
(selectable)
DET
Reference voltage
generation circuit
VSS
HYS1
HYS2
*1
RT
*1.
The HYS2 pin is not equipped for SOT-23-5.
Figure 1
2. Nch open drain output product
VDD
Temperature
sensor
+
−
Delay circuit
Logic circuit
(selectable)
DET
Reference voltage
generation circuit
VSS
HYS1
HYS2
*1
RT
*1.
The HYS2 pin is not equipped for SOT-23-5.
Figure 2
2
Seiko Instruments Inc.
Rev.2.1
_00
Product Name Structure
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5841 Series
Users are able to select the option for hysteresis temperature, detection temperature, output form and logic, package for the
S-5841 Series.
1. Product name
S-5841
x
xx
x
-
xxxx
x
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
Package abbreviation and IC packing specifications
M5T1: SOT-23-5, Tape
I6T1: SNT-6A, Tape
Output form and Output logic
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
)
*3
40 to 100
When the detection temperature is
+80°C,
it is expressed as 80.
When the detection temperature is
+100°C,
it is expressed as A0.
Option
SOT-23-5
A: Hysteresis temperature switched in 2°C and 10°C
B: Hysteresis temperature switched in 4°C and 10°C
SNT-6A
A: Hysteresis temperature switched in 0°C, 2°C, 4°C and 10°C
Product name
*1.
Refer to the tape drawing.
*2.
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 in CMOS or Nch open drain.
*3.
The detection temperature (T
DET
) can be set in the range of
+
40
°
C to
+
100
°
C at 1
°
C step.
*4.
The hysteresis temperature is set by the HYS1 pin for SOT-23-5. By option, the hysteresis temperature of the
product is selectable in 2
°
C and 10
°
C / 4
°
C and 10
°
C.
The hysteresis temperature can be switched in 0
°
C, 2
°
C, 4
°
C, 10
°
C, and is set by the HYS1 pin and the HYS2 pin
for SNT-6A.
*4
*2
*1
Seiko Instruments Inc.
3
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5841 Series
2. Packages
Table 1
Package Drawing Codes
Rev.2.1
_00
Package Name
SOT-23-5
SNT-6A
Dimension
MP005-A-P-SD
PG006-A-P-SD
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
Detection
Hysteresis
DET Pin Output Form DET Pin Output Logic
Temperature (T
DET
)
Temperature (T
HYS
)
S-5841A55D-M5T1x
+
55
°
C
Nch open drain
Active "L"
2
°
C, 10
°
C
S-5841A65D-M5T1x
+
65
°
C
Nch open drain
Active "L"
2
°
C, 10
°
C
S-5841A75D-M5T1x
+
75
°
C
Nch open drain
Active "L"
2
°
C, 10
°
C
S-5841A85D-M5T1x
+
85
°
C
Nch open drain
Active "L"
2
°
C, 10
°
C
S-5841A95D-M5T1x
+
95
°
C
Nch open drain
Active "L"
2
°
C, 10
°
C
Remark 1.
Please contact our sales office for products other than those specified above.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
Product Name
3. 2
SNT-6A
Table 3
Detection
Hysteresis
DET Pin Output Form DET Pin Output Logic
Temperature (T
DET
)
Temperature (T
HYS
)
S-5841A70A-I6T1x
+
70
°
C
CMOS
Active "H"
0
°
C, 2
°
C, 4
°
C, 10
°
C
S-5841A80A-I6T1x
+
80
°
C
CMOS
Active "H"
0
°
C, 2
°
C, 4
°
C, 10
°
C
S-5841A90A-I6T1x
+
90
°
C
CMOS
Active "H"
0
°
C, 2
°
C, 4
°
C, 10
°
C
S-5841A50D-I6T1x
+
50
°
C
Nch open drain
Active "L"
0
°
C, 2
°
C, 4
°
C, 10
°
C
Remark 1.
Please contact our sales office for products other than those specified above.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
Product Name
4
Seiko Instruments Inc.
Rev.2.1
_00
Pin Configurations
1. SOT-23-5
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5841 Series
Table 4
Top view
5
4
Pin No.
1
2
3
4
5
*1.
*2.
1 2 3
Figure 3
Symbol
HYS1
*1
VSS
RT
*2
VDD
DET
Description
Hysteresis pin 1
GND pin
Test pin
Power supply pin
Output pin
Fix the HYS1 pin as VDD pin or VSS pin in use.
Set the RT pin open in use.
2. SNT-6A
Table 5
Pin No.
Top view
1
2
3
6
5
4
Figure 4
*1.
*2.
Symbol
Description
*1
RT
1
Test pin
2
VSS
GND pin
*2
HYS1
3
Hysteresis pin 1
4
DET
Output pin
*2
HYS2
5
Hysteresis pin 2
6
VDD
Power supply pin
Set the RT pin open in use.
Fix the HYS1 pin and the HYS2 pin as VDD pin or VSS pin
in use.
Seiko Instruments Inc.
5
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