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PDF S-5844A Data sheet ( Hoja de datos )
| Número de pieza | S-5844A | |
| Descripción | TEMPERATURE SWITCH IC | |
| Fabricantes | Seiko Instruments Semiconductor | |
| Logotipo |  |
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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
1 page  
Rev.2.6_00
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5844A Series
3. 2 SNT-4A
Table 3
Product Name
Detection
Temperature
(TDET)
DET Pin Output Form DET Pin Output Logic
S-5844A50DB-I4T1U3
S-5844A55CB-I4T1U3
S-5844A55CC-I4T1U3
S-5844A55CD-I4T1U3
S-5844A55DB-I4T1U3
S-5844A60CB-I4T1U3
S-5844A60CC-I4T1U3
S-5844A60CD-I4T1U3
S-5844A60DB-I4T1U3
S-5844A65CB-I4T1U3
S-5844A65CC-I4T1U3
S-5844A65CD-I4T1U3
S-5844A65DB-I4T1U3
S-5844A70CB-I4T1U3
S-5844A70CC-I4T1U3
S-5844A70CD-I4T1U3
S-5844A70DB-I4T1U3
S-5844A75CB-I4T1U3
S-5844A75CC-I4T1U3
S-5844A75CD-I4T1U3
S-5844A75DB-I4T1U3
S-5844A80CB-I4T1U3
S-5844A80CC-I4T1U3
S-5844A80CD-I4T1U3
S-5844A80DB-I4T1U3
S-5844A85CB-I4T1U3
S-5844A85CC-I4T1U3
S-5844A85CD-I4T1U3
S-5844A85DB-I4T1U3
S-5844A90CB-I4T1U3
S-5844A90CC-I4T1U3
S-5844A90CD-I4T1U3
S-5844A90DB-I4T1U3
S-5844A95CB-I4T1U3
S-5844A95CC-I4T1U3
S-5844A95CD-I4T1U3
S-5844A95DB-I4T1U3
+50°C
+55°C
+55°C
+55°C
+55°C
+60°C
+60°C
+60°C
+60°C
+65°C
+65°C
+65°C
+65°C
+70°C
+70°C
+70°C
+70°C
+75°C
+75°C
+75°C
+75°C
+80°C
+80°C
+80°C
+80°C
+85°C
+85°C
+85°C
+85°C
+90°C
+90°C
+90°C
+90°C
+95°C
+95°C
+95°C
+95°C
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Nch open-drain
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Remark Please contact our sales office for products with specifications other than the above.
Hysteresis
Temperature
(THYS)
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
10°C
15°C
20°C
10°C
Seiko Instruments Inc.
5
5 Page 
Rev.2.6_00
Operation
TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5844A Series
The S-5844A Series is a temperature switch IC (thermostat IC) which detects temperature and sends a signal to an
external device.
The users can select various combinations of the parameters such as the detection temperature, the output form and logic,
and hysteresis temperature.
Following is about the operation when the DET pin output logic is active "H".
After applying the power supply, the S-5844A Series starts to detect the temperature. If the temperature is lower than the
detection temperature (+TD), the DET pin output keeps "L". After that, the temperature rises and exceeds the detection
temperature, and the DET pin goes in "H".
After the detection, the temperature drops and reaches the release temperature (+TD − THYS), the DET pin output returns to
"L".
Figure 10 is the timing chart.
Hysteresis temperature
(THYS)
Ambient temperature (Ta)
Detection temperature (TD)
Release temperature (TD − THYS)
H
DET pin output
L
Figure 10 Operation when the DET Pin Output Logic is Active "H"
Seiko Instruments Inc.
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet S-5844A.PDF ] | |
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