HYST

SET0

HYST

SET1

SOH

OUT

Time

T =0

L

C

°

T =60

H

C

°

10 C

°

50 C

°

5 C

°

Measured

Temperature

Changeshysteresis

from10

to

C

5 C

°

°

ForcesOUTpinhigh

regardlessoftemperature

9

TMP303

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SBOS486G – JULY 2009 – REVISED JULY 2017

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8.3 Feature Description

The TMP303A temperature trip window resides within the range of 0°C to 60°C, the TMP303B within 0°C to

55°C, the TMP303C within –20°C to 60°C, the TMP303D within –15°C to 125°C, the TMP303E within 0°C to

70°C, the TMP303F within 0°C to 80°C, and the TMP303G within 0°C to 90°C. When any of these trip thresholds

is crossed, the output (OUT) changes state from low to high. OUT does not return to its original low state until

the temperature crosses the hysteresis threshold and returns within the range of the temperature trip window.

connectivity of the output (OUT) pin to the system controller or other temperature response system. The SOH pin

is internally pulled down to ground with a 100-kΩ resistor. If the SOH pin is grounded or left floating, it has no

effect on the behavior of the TMP303A. If the SOH pin is pulled high, the TMP303A immediately forces the

output high, regardless of temperature.

NOTE

This response occurs even if the temperature falls within the 0°C to 60°C temperature

window.

Figure 10 shows this design in graphical form.

Figure 10. TMP303A Output Transfer Curves With Hysteresis Change from 10°C to 5°C and SOH

Functionality