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Seiko Instruments Electronic Components Datasheet

S-5840B Datasheet

TEMPERATURE SWITCH IC

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S-5840B pdf
S-5840B Series
www.sii-ic.com
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
© Seiko Instruments Inc., 2007-2012
Rev.2.1_00
The S-5840B Series is a temperature switch IC (thermostat IC) with a latch function which detects the temperature with a
temperature accuracy of ±2.5°C. 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 μA 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:
TDET = +55 to +95°C, +1°C step, detection accuracy: ±2.5°C
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 μA typ. (Ta = +25°C).
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
*1. Refer to "„ Product Name Structure" for details.
„ Applications
Game console
Electronic device
„ Package
SOT-23-5
Seiko Instruments Inc.
1


Seiko Instruments Electronic Components Datasheet

S-5840B Datasheet

TEMPERATURE SWITCH IC

No Preview Available !

S-5840B pdf
TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH
S-5840B Series
„ Block Diagrams
1. CMOS output product
VDD
Temperature
sensor
+
VREF
Reference voltage
generation circuit
Voltage
detector
2. Nch open drain output product
VDD
VSS
Figure 1
DQ
D-F/F
CK R
RT
Temperature
sensor
+
VREF
Reference voltage
generation circuit
Voltage
detector
DQ
D-F/F
CK R
VSS
Figure 2
RT
Rev.2.1_00
CD
DET
CD
DET
2 Seiko Instruments Inc.


Part Number S-5840B
Description TEMPERATURE SWITCH IC
Maker Seiko Instruments
Total Page 15 Pages
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