Document
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
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.
Rev.2.6_00
TEMPERATURE SWITCH IC (THERMOSTAT IC) S-5844A Series
Product Name Structure
Users are able to select the detection temperature, output form and logic, hysteresis temperature, and package for the S-5844A Series.
1. Product name
S-5844A xx x x - xxxx U 3
Environmental code U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1 M5T1: SOT-23-5, Tape I4T1: SNT-4A, Tape A4T2: HSNT-4 (1010), Tape
Hysteresis temperature*2 A: 5°C B: 10°C C: 15°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*4 50 to 95, A0 (When detection temperature is +80°C, it is expressed as 80. When detection temperature is +100°C, it is expressed as A0.)
*1. Refer to the tape drawing. *2. The hysteresis temperature is selectable in 5°C, 10°C, 15°C, or 20°C.
However, if the detection temperature is +50°C, select the hysteresis temperature in 5°C or 10°C. *3. For the DET pin output, selectable the output logic active "H" or active "L".
For the DET pin output, selectable the output form CMOS or Nch open-drain. *4. Detection temperature (TDET) is settable in +50°C to +100°C, in +5°C step.
2. Packages
Package Name SOT-23-5 SNT-4A HSNT-4 (1010)
Table 1 Package Drawing Codes
Dimension MP005-A-P-SD PF004-A-P-SD PL004-A-P-SD
Tape MP005-A-C-SD PF004-A-C-SD PL004-A-C-SD
Reel MP005-A-R-SD PF004-A-R-SD PL004-A-R-SD
Land
− PF004-A-L-SD PL004-A-L-SD
Seiko Instruments Inc.
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TEMPERATURE SWITCH IC (THERMOSTAT IC) S-5844A Series
Rev.2.6_00
3. Product name list
3. 1 SOT-23-5
Table 2
Product Name
Detection Temperature
(TDET)
DET Pin Output Form DET Pin Output Logic
S-5844A50DB-M5T1U3 S-5844A55CB-M5T1U3 S-5844A55CC-M5T1U3 S-5844A55CD-M5T1U3 S-5844A55DB-M5T1U3 S-5844A60CB-M5T1U3 S-5844A60CC-M5T1U3 S-5844A60CD-M5T1U3 S-5844A60DB-M5T1U3 S-5844A65CB-M5T1U3 S-5844A65CC-M5T1U3 S-5844A65CD-M5T1U3 S-5844A65DA-M5T1U3 S-5844A65DB-M5T1U3 S-5844A70CB-M5T1U3 S-5844A70CC-M5T1U3 S-5844A70CD-M5T1U3 S-5844A70DB-M5T1U3 S-5844A75CB-M5T1U3 S-5844A75CC-M5T1U3 S-5844A75CD-M5T1U3 S-5844A75DB-M5T1U3 S-5844A80CB-M5T1U3 S-5844A80CC-M5T1U3 S-5844A80CD-M5T1U3 S-5844A80DB-M5T1U3 S-5844A85CB-M5T1U3 S-5844A85CC-M5T1U3 S-5844A85CD-M5T1U3 S-5844A85DB-M5T1U3 S-5844A90CB-M5T1U3 S-5844A90CC-M5T1U3 S-5844A90CD-M5T1U3 S-5844A90DB-M5T1U3 S-5844A95CB-M5T1U3 S-5844A95CC-M5T1U3 S-5844A95CD-M5T1U3 S-5844A95DB-M5T1U3
+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 +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 .