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S-5840B

Seiko Instruments
Part Number S-5840B
Manufacturer Seiko Instruments
Description TEMPERATURE SWITCH IC
Published Aug 29, 2009
Detailed Description S-5840B Series www.sii-ic.com TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH © Seiko Instruments Inc., 2007-2012 R...
Datasheet PDF File S-5840B PDF File

S-5840B
S-5840B

Overview
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 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...


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