TECH PUBLIC TP5709S5

The TP5709S5 are fully integrated, resistor programmable temperature switches with thresholds set by an external resistor. They require only one external resistor to set the temperature threshold within a wide 0°C to +125°C temperature range. The TP5709S5 provides an open-drain, active low output. These switches operate with a +2.7V to +5.5V single supply while providing a temperature threshold accuracy of ±0.5°C (typ) or +3.5°C (max). They typically consume 40μA supply current. Hysteresis is pin selectable to 2°C or 10°C

The TP5709S5 fully integrated temperature switches incorporate two temperature-dependent references and one comparator. One reference exhibits a positive temperature coefficient, and the other has a negative temperature coefficient. The temperature at which the two reference voltages are equal determines the temperature trip point. Pin-selectable 2°C or 10°C hysteresis keeps the output from oscillating when the temperature is close to the threshold. The G709/G710 has an active-low, open-drain output structure.

The TP5709S5 are programmable for a wide range of temperature thresholds from 0°C to +125°C. The temperature threshold is set by an external resistor between SET and GND. The G709 output easily interfaces with a microprocessor (μP) reset input.

• ±0.5°C Typical Threshold Accuracy
• ±3.5°C (max) Threshold Accuracy
• 10°C to +125°C Temperature Threshold Set by a 1% External Resistor
• Low 40μA Supply Current
• Open-Drain Active Low Output Stage
• Guaranteed Reset Valid to VCC = 0.8V
• Pin-Selectable 2°C or 10°C Hysteresis
• SOT-23-5 Packages

• μP Temperature Monitoring in High-Speed Computers
• Temperature Control
• Temperature Alarms
• Fan Control
• Automotive