S-5842AAAAF-M6T1Y Datasheet, PDF (12/31 Pages) Seiko Instruments Inc – DUAL TRIP TEMPERATURE SWITCH IC

DUAL TRIP TEMPERATURE SWITCH IC (THERMOSTAT IC)
S-5842A Series
Rev.2.3_01
 Selection of Product Option
1. Description of product option
The S-5842A Series is a temperature switch IC (thermostat IC) which detects two points of temperature, and outputs a
signal to the exterior.
Users are able to select the combination of output type, form and logic, two detection temperatures (TDH, TDL), and
hysteresis temperature (THYSH, THYSL).
Output form: Set the output logic for each DETH pin and DETL pin.
• CMOS output
• Nch open-drain output
Output type: for DETH pin and DETL pin, users are able to select two types of output as follows.
• Separate type: The DETH pin’s output inverts during detection of higher temperature
The DETL pin’s output inverts during detection of lower temperature
• Integrate type: The DETH pin’s output inverts during detection of higher temperature
The DETL pin’s output inverts during detection of higher and lower temperature
Detection temperature (TDH, TDL):
TDH is the detection temperature for higher temperature, TDL is the detection temperature for lower
temperature. Of two points of detection temperatures (TDH, TDL), select the detection temperature
that is to be set the higher accuracy (±2.5°C accuracy).^*1
• The detection temperature for higher temperature is selectable in +20°C to +110°C, in 1°C step.
• The detection temperature for lower temperature is selectable in −10°C to +110°C, in 1°C step.
• Set two points of detection temperature so that the difference of detection temperature (ΔTDET) is in 0°C
to 65°C. Users are able to set ΔTDET in 0°C, 5°C, 10°C … 60°C, 65°C.
The minimum operation voltage varies according to the detection temperature for lower temperature.
• Detection temperature = +20°C to +110°C:
• Detection temperature = 0°C to +110°C:
• Detection temperature = −10°C to +110°C:
VDD = 2.5 V min.
VDD = 2.7 V min.
VDD = 2.8 V min.
*1 Either of two detection temperatures (TDH, TDL), an accuracy of ±2.5°C is set only for the one that user specifies a
higher accuracy than the other (TDH, TDL).
Hysteresis temperature (THYSH, THYSL):
THYSH is the hysteresis temperature for detection temperature for higher temperature, THYSL is the
hysteresis temperature for detection temperature for lower temperature. These are selectable in −5°C,
−2°C, +2°C, or +5°C.
• −5°C: Output recovers when temperature has dropped to 5°C from the detection temperature.
• −2°C: Output recovers when temperature has dropped to 2°C from the detection temperature.
• +2°C: Output recovers when temperature has risen to 2°C from the detection temperature.
• +5°C: Output recovers when temperature has risen to 5°C from the detection temperature.
Output logic: Set the output logic for each DETH, DETL pin in Ta > detection temperature (TDH, TDL) or release
temperature (TDH + THYSH, TDL + THYSL).
(1) Hysteresis temperature: −5°C, −2°C
• The output logic is "H" in Ta > detection temperature
• The output logic is "L" in Ta > detection temperature
(2) Hysteresis temperature: +2°C, +5°C
• The output logic is "H" in Ta > release temperature
• The output logic is "L" in Ta > release temperature
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