S5840B

S5840B SII | Alldatasheet

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www.sii-ic.com TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH © Seiko Instruments Inc., 2007-2012 Rev.2.1_00 Seiko Instruments Inc. 1 The S-5840B Series is a temperature switch IC (thermostat IC) with a latch functi on 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 tem perature coefficient, a re ference voltage generation circuit, comparator, voltage detection circuit and noise suppre ssion 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 temperat ure range: Ta = −40°C to +100°C
• Lead-free, Sn 100%, halogen-free *1. Refer to "„ Product Name Structure" for details. „ Applications
• Game console
• Electronic device „ Package
• SOT-23-5

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH Rev.2.1_00 S-5840B Series Seiko Instruments Inc. 3 „ 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 (TDET) 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 Dimension Tape Reel SOT-23-5 MP005-A-P-SD MP 005-A-C-SD MP005-A-R-SD 3. Product name list Table 2 Product Name Detection Temperature (TDET) DET Pin Output Form DET Pin Output Logic Release Voltage (VRET) 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.

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH S-5840B Series Rev.2.1_00 Seiko Instruments Inc. 4 „ Pin Configuration 1. SOT-23-5 Table 3 Pin No. Symbol Description

1 RT*1 Test pin

2 VSS GND pin

3 CD Capacitor connection pin for setting

malfunction prevention time

4 DET Output pin

5 VDD Power supply pin

*1. Set the RT pin open in use.

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH Rev.2.1_00 S-5840B Series Seiko Instruments Inc. 5 „ Absolute Maximum Ratings Table 4 (Ta = +25°C unless otherwise specified) Item Symbol Absolute Maximum Rating Unit Power supply voltage (VSS = 0 V) VDD V SS + 12 V Pin voltage VRT, VCD V SS − 0.3 to VDD + 0.3 V CMOS output VSS − 0.3 to VDD + 0.3 V Output voltage Nch open drain output VDET VSS − 0.3 to VSS + 12.0 V 300 (when not mounted on board) mW Power dissipation PD 600*1 mW Operating temperature Topr −40 to +100 °C Storage temperature Tstg −55 to +125 °C *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 va lues 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 Symbol Value Unit CD capacitance C D 4.7 nF

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH S-5840B Series Rev.2.1_00 Seiko Instruments Inc. 6 „ DC Electrical Characteristics 1. CMOS output product Table 6 (Ta = +25°C, unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Power supply voltage V DD − 1.0 − 10.0 V 1 Detection temperature +TD − T DET − 2.5 T DET T DET + 2.5 °C 1 IDETH VDET = 2.7 V 2 9.4 − mA 2 Output current IDETL VDD = 3.5 V, Apply to DET pin VDET = 0.4 V 0.5 2.8 − mA 2 Release voltage for built-in voltage detector VR − V RET × 0.98 V RET V RET × 1.02 V − Hysteresis width for built-in voltage detector V HYS − − VRET × 0.05 − V − Temperature coefficient for built-in voltage detector Δ Δ V Ta V RET RET• Ta = −40°C to +100°C − ±100 − ppm/°C − Current consumption during operation I DD V DD = 3.5 V − 12 24 μA 1 2. Nch open drain output product Table 7 (Ta = +25°C, unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Power supply voltage V DD − 1.0 − 10.0 V 1 Detection temperature +TD − T DET − 2.5 T DET T DET + 2.5 °C 1 IDETL VDET = 0.4 V, VDD = 3.5 V 0.5 2.8 − mA 2 Output current ILEAK VDET = 10.0 V, VDD = 3.5 V − − 100 nA 2 Release voltage for built-in voltage detector VR − V RET × 0.98 V RET V RET × 1.02 V − Hysteresis width for built-in voltage detector V HYS − − VRET × 0.05 − V − Temperature coefficient for built-in voltage detector Δ Δ V Ta V RET RET• Ta = −40°C to +100°C − ±100 − ppm/°C − Current consumption during operation I DD V DD = 3.5 V − 12 24 μA 1 „ AC Electrical Characteristics Table 8 Item Symbol Condition Min. Typ. Max. Unit Test Circuit Noise suppression time t noise CD = 4.7 nF, VDD = 3.5 V, Ta = detection temperature 10 30 50 ms −

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH S-5840B Series Rev.2.1_00 Seiko Instruments Inc. 8 „ Operation 1. Basic operation 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. 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. Temperatur e detection then starts and the DET pin is held "L" as long as the temperature is lower than the detection temperat ure. 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 (V R − VHYS) of the built- in voltage detector circuit to reset the internal circuit. Using the internal reference voltage and built-in temper ature sensor, a detection temperature accuracy of ±2.5°C is achieved in the S-5840B Series. 2. Noise suppression circuit 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. Noise suppression time (t noise) is determined by the time constant consis ting of internal constant current and the capacitance of the CD, and calculated by the following equation. t noise (ms) = Noise suppression time coefficient × CD (nF) Noise suppression time coefficient (Ta = +25°C): 6.4 typ. 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.

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH Rev.2.1_00 S-5840B Series Seiko Instruments Inc. 9 „ Standard Circuit VSS CD VDD DET S-5840B Series RT Open CD CL CIN R*1 100 kΩ *1. Resistor (R) is unnecessary for the CMOS output product. Figure 6 Caution The above connection diagr am will not guarantee successful opera tion. Perform thorough evaluation using actual application to set the constant. „ Precautions

• Set a capacitor (C IN) of 0.1 μF or more between VDD and VSS pin for stabilization.
• A capacitor (C L) of about 1 μF 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 t he RT pin open). Otherwise, this IC may oscillate.
• Do not apply an electrostatic discharge to this IC that ex ceeds the performance ratings of the built-in electrostatic protection circuit.
• SII 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.

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH S-5840B Series Rev.2.1_00 Seiko Instruments Inc. 10 „ Characteristics (Typical Data) 1. Current consumption vs. Power supply voltage characteristics 1234 IDD [μA] 06 7 8 9 10 11 125 VDD [V] VSS = 0 V −40°C +100°C +25°C 2. DET pin current "H" vs. Power supply voltage characteristics (CMOS output product only) 1234 IDETH [mA] 06 7 8 9 10 11 125 VDD [V] VDET = VDD − 0.8 V −40°C +100°C +25°C 3. DET pin current "L" vs. Power supply voltage characteristics 1234 IDETL [mA] 06 7 8 9 10 11 125 VDD [V] VDET = 0.4 V −40°C +100°C +25°C 4. Noise suppression time vs. Power supply voltage characteristics 1234 tnoise [ms] 06 7 8 9 10 11 125 VDD [V] CD = 4.7 nF −40°C +100°C +25°C

TEMPERATURE SWITCH IC (THERMOSTAT IC) WITH LATCH Rev.2.1_00 S-5840B Series Seiko Instruments Inc. 11 „ Marking Specification 1. SOT-23-5 (1) to (3): Product code (refer to Product name vs. Product code) (4): Lot number 123 Top view (1) (2) (3) (4) Product name vs. Product code Product Code Product Name (1) (2) (3) S-5840BAG-M5T1x H 8 M S-5840BAH-M5T1x H 8 N 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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