TMP302

TRIPSET0

TRIPSET1

HYSTSET

GND

OUT

OUTPUT

VS

1.4 V to 3.6 V

10 k

0.1 F

TMP302

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SBOS488C – JUNE 2009 – REVISED AUGUST 2015

Typical Application (continued)

Figure 11 shows the most generic implementation of the TMP302 family of devices. Switches are shown

strictly required; the switches are shown only to illustrate the various pin connection combinations. In practice,

minimizes space and cost. If additional flexibility is desired, connections from the TMPSET0, TMPSET1, and

HYSTSET pins can be made through 0-

Ω resistors which can be either populated or not populated depending

upon the desired connection.

Figure 11. TMP302 Generic Application Schematic

8.2.1 Design Requirements

Designing with the TMP302 family of devices is simple. The TMP302 is a temperature switch commonly used to

signal a microprocessor in the event of an over temperature condition. The temperature at which the TMP302

issues an active low alert is determined by the configuration of the TRIPSET0 and TRIPSET1 pins. These two

pins are digital inputs and must be tied either high or low, according to Table 1. The TMP302 will issue an active

low alert when the temperature threshold is exceeded. To avoid the TMP302 signaling the microprocessor as

soon as the temperature drops below the temperature threshold the TMP302 has built-in hysteresis. The amount

of hysteresis is determined by the Hystest pin. This pin is a digital input and must be tied either high or low,

according to Table 2.

See Figure 10 and Figure 11 for typical circuit configurations.

8.2.2 Detailed Design Procedure

Determine the threshold temperature and hysteresis required for the application. Connect the TMPSET0,

TMPSET1, and HYSTSET pins according to the application requirements. Refer to Table 1 and Table 2. Use a

10-k

used but must not exceed 100 k

Ω. Place a 0.1-µF bypass capacitor close to the TMP302 device to reduce noise

coupled from the power supply.

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