S-5840B Series
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
www.ablicinc.com
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Rev.2.1_02
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© ABLIC Inc., 2007-2012
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The S-5840B Series is a temperature switch IC (thermostat IC) with a latch function which detects the temperature with a
temperature accuracy of 2.5C. When the temperature reaches the detection temperature, the output signal is inverted and
being latched until the S-5840B Series detects decrease in a power supply voltage.
The S-5840B Series operates at the lower power supply voltage of 1.0 V and its current consumption is 12 A typ. due to
CMOS configuration.
The S-5840B Series has a temperature sensor using negative temperature coefficient, a reference voltage generation
circuit, comparator, voltage detection circuit and noise suppression circuit on a chip, and they are enclosed in package
SOT-23-5.
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Detection temperature:
TDET = 55 to 95C, 1C step, detection accuracy: 2.5C
Wide voltage operation:
VDD = 1.0 V to 10.0 V
Release voltage:
VRET = 2.2 V to 3.4 V, 0.1 V step
Low current consumption:
IDD =12 A typ. (Ta =25C).
Built-in noise suppression circuit for preventing temperature detection malfunction
Output logic level is fixed by the latch after temperature detection.
Selectable output logic in active "H" or "L"
Selectable output form in CMOS or Nch open drain
Operation temperature range:
Ta = 40°C to 100°C
Lead-free, Sn 100%, halogen-free*1
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Features
Applications
Game console
Electronic device
Package
SOT-23-5
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*1. Refer to " Product Name Structure" for details.
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Block Diagrams
1.
CMOS output product
Temperature
sensor
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VDD
CD
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VREF
Reference voltage
generation circuit
DET
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D Q
D-F/F
CK R
R
Voltage
detector
RT
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VSS
2. Nch open drain output product
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Temperature
sensor
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VDD
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Figure 1
CD
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VREF
Reference voltage
generation circuit
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D Q
D-F/F
CK R
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Voltage
detector
2
VSS
Figure 2
RT
DET
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Product Name Structure
Users are able to select the option for detection temperature, output form and logic, release voltage for the S-5840B Series.
S-5840B
xx
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M5T1
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Product name
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1.
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*1
M5T1: SOT-23-5, tape
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Option*2
Package
Table 1
Product name list
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3.
Dimension
MP005-A-P-SD
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Package Name
SOT-23-5
Package Drawing Codes
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*1. Refer to the tape drawing.
*2. Option list
The detection temperature (TDET) can be set in the range of 55C to 95 at 1C step.
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.
The release voltage (VRET) can be set in the range of 2.2 V to 3.4 V at 0.1 V step.
Tape
MP005-A-C-SD
Reel
MP005-A-R-SD
Table 2
Detection Temperature
Release Voltage
DET Pin Output Form DET Pin Output Logic
(TDET)
(VRET)
S-5840BAG-M5T1x
60C
CMOS
Active "L"
2.9 V
S-5840BAH-M5T1x
90C
CMOS
Active "H"
2.9 V
S-5840BAJ-M5T1x
80C
Nch open drain
Active "L"
2.2 V
Remark 1. Please contact our sales office for options other than that specified above.
2. x: G or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
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Product Name
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Pin Configuration
Top view
5
Table 3
4
Pin No.
1 2 3
Figure 3
Symbol
RT*1
VSS
3
CD
4
DET
5
VDD
Set the RT pin open in use.
Description
Test pin
GND pin
Capacitor connection pin for setting
malfunction prevention time
Output pin
Power supply pin
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*1.
1
2
4
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SOT-23-5
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1.
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Absolute Maximum Ratings
Table 4
Power dissipation
PD
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Symbol
VDD
VRT, VCD
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Item
Power supply voltage (VSS = 0 V)
Pin voltage
CMOS output
Output voltage
Nch open drain output
(Ta = 25C unless otherwise specified)
Absolute Maximum Rating
Unit
VSS 12
V
VSS 0.3 to VDD 0.3
V
VSS 0.3 to VDD 0.3
V
VSS 0.3 to VSS 12.0
V
300 (when not mounted on board)
mW
600*1
mW
40 to 100
C
55 to 125
C
VDET
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Operating temperature
Topr
Storage temperature
Tstg
*1. When mounted on board
[Mounted board]
(1) Board size:
114.3 mm 76.2 mm t1.6 mm
(2) Board name:
JEDEC STANDARD51-7
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Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
Recommended Values for External Parts
Symbol
Value
Unit
4.7
nF
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CD
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Item
CD capacitance
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Table 5
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
DC Electrical Characteristics
1.
CMOS output product
1.0
TDET 2.5
IDETH
VDD = 3.5 V, VDET = 2.7 V
Apply to DET
VDET = 0.4 V
pin
2
0.5
IDETL
Release voltage for built-in
VR
voltage detector
Hysteresis width for built-in
VHYS
voltage detector
VRET
Temperature coefficient
for built-in voltage detector Ta VRET
Current consumption
IDD
during operation
2.
Ta = 40°C to 100°C
VDD = 3.5 V
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VDD
TD
TDET
10.0
TDET 2.5
V
°C
1
1
9.4
mA
2
2.8
mA
2
VRET 0.98
VRET
VRET 1.02
V
VRET 0.05
V
100
ppm/°C
12
24
A
1
W
Output current
Min.
R
Power supply voltage
Detection temperature
Condition
NE
Symbol
(Ta = 25C, unless otherwise specified)
Test
Typ.
Max.
Unit
Circuit
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Table 6
Nch open drain output product
Symbol
VDD
TD
Min.
1.0
TDET 2.5
TDET
10.0
TDET 2.5
V
°C
1
1
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Power supply voltage
Detection temperature
Output current
IDETL
VDET = 0.4 V, VDD = 3.5 V
0.5
2.8
mA
2
ILEAK
VDET = 10.0 V, VDD = 3.5 V
100
nA
2
VRET 0.98
VRET
VRET 1.02
V
VRET 0.05
V
Ta = 40°C to 100°C
100
ppm/°C
VDD = 3.5 V
12
24
A
1
CO
Release voltage for built-in
VR
voltage detector
Hysteresis width for built-in
VHYS
voltage detector
VRET
Temperature coefficient for
Ta
VRET
built-in voltage detector
IDD
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Current consumption
during operation
(Ta = 25C, unless otherwise specified)
Test
Typ.
Max.
Unit
Circuit
Condition
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Item
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Table 7
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AC Electrical Characteristics
Item
Noise suppression time
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Table 8
Symbol
tnoise
Condition
CD = 4.7 nF, VDD = 3.5 V,
Ta = detection temperature
Min.
Typ.
Max.
Unit
Test
Circuit
10
30
50
ms
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Open
VDD
RT
CIN
V
R *1
100 kΩ
S-5840B Series
DET
CD
VSS
CL V
Resistor (R) is unnecessary for the CMOS output product.
Test Circuit 1
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Figure 4
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CD
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Test Circuits
Open
RT
V
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VDD
S-5840B Series
CIN
CD
A
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EN
VSS
CD
V
CL
Test Circuit 2
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Figure 5
DET
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Operation
1.
Basic operation
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The S-5840B Series is a temperature switch IC (thermostat IC) which detects the temperature and sends a signal to an
external device. The users can select a combination of the parameters such as detection temperature and release
voltage.
2.
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Following is about the operation when the DET pin output logic is active "H".
When the power supply voltage is turned on, the DET pin voltage goes to "L" since the flip-flop circuit in the detection
circuit is cleared by the voltage detection circuit. Temperature detection then starts and the DET pin is held "L" as long
as the temperature is lower than the detection temperature. When the temperature rises and when the temperature
exceeds the detection temperature; longer than the time defined by the capacitor connected to the CD pin, the DET pin
goes to "H". Once the over-temperature is detected and the DET pin goes to "H", the state is held by the flip-flop circuit.
In order to release the state, the power supply voltage should be set under the detection voltage (VR VHYS) of the builtin voltage detector circuit to reset the internal circuit.
Using the internal reference voltage and built-in temperature sensor, a detection temperature accuracy of 2.5C is
achieved in the S-5840B Series.
Noise suppression circuit
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The noise suppression circuit prevents malfunction of the temperature switch caused by noise.
The noise suppression circuit starts charging the capacitor connected to the CD pin when the output of the internal
comparator enters the active state due to an external noise or a rapid change in the power supply voltage. In the normal
operation, the flip-flop circuit is set when the capacitor is charged to a certain voltage. But in the noise triggered
operation, the comparator output goes back to the inactive state and the CD pin voltage is held "L" since the charging of
the external capacitor (CD) is insufficient. As a result, the DET pin is held "L" and malfunction does not occur.
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Noise suppression time (tnoise) is determined by the time constant consisting of internal constant current and the
capacitance of the CD, and calculated by the following equation.
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tnoise (ms) = Noise suppression time coefficient CD (nF)
Noise suppression time coefficient (Ta = 25C): 6.4 typ.
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The CD has no limitation as long as its leak current is negligible compared to the internal constant current. The difference
occurs in delay time if the capacitor has a leak current.
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
RT
S-5840B Series
CIN
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100 k
DET
CD
VSS
CL
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Resistor (R) is unnecessary for the CMOS output product.
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*1.
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CD
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*1
Open
VDD
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Standard Circuit
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Figure 6
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Caution The above connection diagram will not guarantee successful operation. Perform thorough evaluation
using actual application to set the constant.
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Precautions
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Set a capacitor (CIN) of 0.1 F or more between VDD and VSS pin for stabilization.
A capacitor (CL) of about 1 F should be connected to the DET pin to prevent malfunction caused by noise due to the
power being on.
Do not connect a capacitor to the RT pin (leave the RT pin open). Otherwise, this IC may oscillate.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
ABLIC Inc. claims no responsibility for any disputes arising out of or in connection with any infringement by products,
including this IC, of patents owned by a third party.
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Characteristics (Typical Data)
Current consumption vs. Power supply voltage characteristics
40C
IDD [A]
12
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VSS = 0 V
13
100C
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1.
25C
10
9
VDET = VDD 0.8 V
25
15
25C
40C
R
IDETH [mA]
20
NE
DET pin current "H" vs. Power supply voltage characteristics (CMOS output product only)
10
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0 1 2 3 4 5 6 7 8 9 10 11 12
VDD [V]
100C
5
0
DET pin current "L" vs. Power supply voltage characteristics
VDET = 0.4 V
10
25C
IDETL [mA]
8
6
40C
4
100C
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0 1 2 3 4 5 6 7 8 9 10 11 12
VDD [V]
0 1 2 3 4 5 6 7 8 9 10 11 12
VDD [V]
tnoise [ms]
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45
40
35
30
25
20
15
10
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4. Noise suppression time vs. Power supply voltage characteristics
CD = 4.7 nF
40C
25C
100C
0 1 2 3 4 5 6 7 8 9 10 11 12
VDD [V]
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TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Rev.2.1_02
Marking Specification
1.
SOT-23-5
(1) to (3):
(4):
4
Product code (refer to Product name vs. Product code)
Lot number
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Top view
(1) (2) (3) (4)
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3
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Product name vs. Product code
Product Code
(1)
(2)
(3)
Product Name
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S-5840BAG-M5T1x
H
8
M
S-5840BAH-M5T1x
H
8
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S-5840BAJ-M5T1x
H
8
O
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
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2.9±0.2
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1.9±0.2
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2
3
+0.1
0.16 -0.06
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0.95±0.1
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5
MM
EN
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0.4±0.1
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No. MP005-A-P-SD-1.3
TITLE
SOT235-A-PKG Dimensions
No.
MP005-A-P-SD-1.3
ANGLE
UNIT
mm
ABLIC Inc.
4.0±0.1(10 pitches:40.0±0.2)
+0.1
2.0±0.05
0.25±0.1
+0.2
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ø1.5 -0
4.0±0.1
1.4±0.2
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ø1.0 -0
5
Feed direction
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3 2 1
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3.2±0.2
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No. MP005-A-C-SD-2.1
TITLE
SOT235-A-Carrier Tape
No.
MP005-A-C-SD-2.1
ANGLE
UNIT
mm
ABLIC Inc.
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12.5max.
9.0±0.3
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Enlarged drawing in the central part
(60°)
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(60°)
ø13±0.2
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No. MP005-A-R-SD-1.1
SOT235-A-Reel
TITLE
No.
MP005-A-R-SD-1.1
ANGLE
QTY.
UNIT
mm
ABLIC Inc.
3,000
Disclaimers (Handling Precautions)
All the information described herein (product data, specifications, figures, tables, programs, algorithms and application
circuit examples, etc.) is current as of publishing date of this document and is subject to change without notice.
2.
The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein
(hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use
of the information described herein.
3.
ABLIC Inc. is not responsible for damages caused by the incorrect information described herein.
4.
Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings,
operation voltage range and electrical characteristics, etc.
ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the
products outside their specified ranges.
5.
When using the products, confirm their applications, and the laws and regulations of the region or country where they
are used and verify suitability, safety and other factors for the intended use.
6.
When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related
laws, and follow the required procedures.
7.
The products must not be used or provided (exported) for the purposes of the development of weapons of mass
destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to
develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use.
8.
The products are not designed to be used as part of any device or equipment that may affect the human body, human
life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control
systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment,
aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do
not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc.
Especially, the products cannot be used for life support devices, devices implanted in the human body and devices
that directly affect human life, etc.
Prior consultation with our sales office is required when considering the above uses.
ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products.
9.
Semiconductor products may fail or malfunction with some probability.
The user of the products should therefore take responsibility to give thorough consideration to safety design including
redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or
death, fires and social damage, etc. that may ensue from the products' failure or malfunction.
The entire system must be sufficiently evaluated and applied on customer's own responsibility.
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1.
10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the
product design by the customer depending on the intended use.
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11. The products do not affect human health under normal use. However, they contain chemical substances and heavy
metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be
careful when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.
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13. The information described herein contains copyright information and know-how of ABLIC Inc.
The information described herein does not convey any license under any intellectual property rights or any other
rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any
part of this document described herein for the purpose of disclosing it to a third-party without the express permission
of ABLIC Inc. is strictly prohibited.
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14. For more details on the information described herein, contact our sales office.
2.0-2018.01
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