Document
S-5841 Series
www.sii-ic.com © Seiko Instruments Inc., 2007-2015
TEMPERATURE SWITCH IC (THERMOSTAT IC)
Rev.2.2_00
The S-5841 Series is a temperature switch IC (thermostat IC) which detects the temperature with a temperature accuracy of ±2.5°C. The output inverts when temperature reaches the detection temperature. The S-5841 Series restores the output voltage when the temperature drops to the level of release temperature. The S-5841 Series operates at the lower power supply voltage of 2.2 V and its current consumption is 10 μA typ. due to CMOS configuration. A temperature sensor with the negative temperature coefficient, a reference voltage generation circuit, a comparator and a delay circuit are integrated on one chip, and enclosed into the packages SOT-23-5 and SNT-6A.
Features
• Detection temperature:
TDET = +40°C to +100°C, +1°C step, detection accuracy: ±2.5°C
• Low voltage operation:
VDD = 2.2 V min.
(Detection temperature = +55°C to +100°C, Ta = −40°C to +100°C)
• Low current consumption:
IDD = 10 μA typ. (Ta = +25°C)
• Hysteresis temperature can be switched in 0°C, 2°C, 4°C and 10°C.
• Selectable output logic in active "H" or "L"
• Selectable output form in CMOS or Nch open drain
• Operation temperature range:
Ta = −40°C to +125°C
• Lead-free, Sn 100%, halogen-free*1
*1. Refer to " Product Name Structure" for details.
Applications
• Fan control • Air conditioning system • Various electronic devices
Packages
• SOT-23-5 • SNT-6A
Seiko Instruments Inc.
1
TEMPERATURE SWITCH IC (THERMOSTAT IC) S-5841 Series
Block Diagrams
1. CMOS output product
VDD
Temperature sensor
+ −
Delay circuit
Logic circuit (selectable)
Reference voltage generation circuit
VSS
HYS1 HYS2*1
*1. The HYS2 pin is not equipped for SOT-23-5. Figure 1
2. Nch open drain output product
VDD
RT
Temperature sensor
+ −
Delay circuit
Logic circuit (selectable)
Reference voltage generation circuit
VSS
HYS1 HYS2*1
*1. The HYS2 pin is not equipped for SOT-23-5. Figure 2
RT
2 Seiko Instruments Inc.
Rev.2.2_00
DET
DET
Rev.2.2_00
TEMPERATURE SWITCH IC (THERMOSTAT IC) S-5841 Series
Product Name Structure
Users are able to select the option for hysteresis temperature, detection temperature, output form and logic, package for the S-5841 Series.
1. Product name
1. 1 SOT-23-5 S-5841 x xx x - 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
Output form and Output logic*2 A: CMOS output (Active "H") B: CMOS output (Active "L") C: Nch open drain output (Active "H") D: Nch open drain output (Active "L")
Detection temperature (TDET)*3 40 to 100 When the detection temperature is +80°C, it is expressed as 80. When the detection temperature is +100°C, it is expressed as A0.
Option*4 A: Hysteresis temperature switched in 2°C and 10°C B: Hysteresis temperature switched in 4°C and 10°C
Product name
*1..