S-5840B Series
www.ablic.com
www.ablicinc.com
© ABLIC Inc., 2007-2012
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
Rev.2.1
_02
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.
Features
Detection temperature:
T
DET
=
55
to
95C, 1C
step, detection accuracy:
2.5C
Wide voltage operation:
V
DD
= 1.0 V to 10.0 V
Release voltage:
V
RET
= 2.2 V to 3.4 V, 0.1 V step
Low current consumption:
I
DD
=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
*1
Lead-free, Sn 100%, halogen-free
*1.
Refer to "
Product Name Structure"
for details.
Applications
Game console
Electronic device
Package
SOT-23-5
1
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Block Diagrams
1.
CMOS output product
VDD
Rev.2.1
_02
Temperature
sensor
V
REF
CD
Reference voltage
generation circuit
D Q
D-F/F
CK R
DET
Voltage
detector
VSS
RT
Figure 1
2. Nch open drain output product
VDD
Temperature
sensor
V
REF
CD
Reference voltage
generation circuit
D Q
D-F/F
CK R
DET
Voltage
detector
VSS
RT
Figure 2
2
Rev.2.1
_02
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Product Name Structure
Users are able to select the option for detection temperature, output form and logic, release voltage for the S-5840B Series.
1.
Product name
S-5840B
xx
-
M5T1
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
*1
M5T1: SOT-23-5, tape
Option
*2
*1.
Refer to the tape drawing.
*2.
Option list
The detection temperature (T
DET
) can be set in the range of
55
C to
95
at 1
C 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 (V
RET
) can be set in the range of 2.2 V to 3.4 V at 0.1 V step.
2.
Package
Table 1
Package Drawing Codes
Package Name
SOT-23-5
Dimension
MP005-A-P-SD
Tape
MP005-A-C-SD
Reel
MP005-A-R-SD
3.
Product name list
Table 2
Detection Temperature
Release Voltage
DET Pin Output Form DET Pin Output Logic
(T
DET
)
(V
RET
)
S-5840BAG-M5T1x
60
C
CMOS
Active "L"
2.9 V
S-5840BAH-M5T1x
90
C
CMOS
Active "H"
2.9 V
S-5840BAJ-M5T1x
80
C
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.
Product Name
3
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Pin Configuration
1.
SOT-23-5
Top view
5
4
Pin No.
1
2
Symbol
RT
*1
VSS
CD
Table 3
Description
Rev.2.1
_02
1 2 3
Figure 3
*1.
3
4
DET
5
VDD
Set the RT pin open in use.
Test pin
GND pin
Capacitor connection pin for setting
malfunction prevention time
Output pin
Power supply pin
4
Rev.2.1
_02
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
Absolute Maximum Ratings
Table 4
Item
Power supply voltage (V
SS
= 0 V)
Pin voltage
CMOS output
Output voltage
Nch open drain output
Power dissipation
Symbol
V
DD
V
RT
, V
CD
V
DET
P
D
(Ta =
25C
unless otherwise specified)
Absolute Maximum Rating
Unit
V
SS
12
V
V
SS
0.3 to V
DD
0.3
V
V
SS
0.3 to V
DD
0.3
V
V
SS
0.3 to V
SS
12.0
V
300 (when not mounted on board)
mW
*1
600
mW
40
to
100
C
55
to
125
C
Operating temperature
T
opr
Storage temperature
T
stg
*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
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
Table 5
Item
CD capacitance
C
D
Symbol
Value
4.7
Unit
nF
5
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