© Seiko Instruments Inc., 2010-2013
PWM OUTPUT TEMPERATURE SENSOR IC
The S-5855A Series, developed by CMOS technology, is a 1-wire PWM output temperature sensor IC of low current
consumption that itself changes the duty ratio according to temperature.
The duty ratio decreases from 100% if exceeding the temperature set by user, and this decrease is linear against the
The output form is selectable from CMOS output and Nch open-drain output.
Its small packages SNT-4A and SOT-23-5 enable high-density mounting.
• PWM output
• Temperature accuracy
• Duty ratio change-start temperature
• Duty ratio temperature sensitivity
• Low current consumption
• Low power supply voltage
• Wide range of operation temperature
• Lead-free (Sn 100%), halogen-free
: 1-wire PWM interface
: Selectable from +40°C to +80°C in 10°C step
: Selectable from −1 %/°C to −4 %/°C in 1 %/°C step
: 50 μA typ. (Ta = +25°C)
: 1.65 V to 5.5 V
: Ta = −40°C to +125°C
• Temperature compensation for LED instruments
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