TMP392

• Resistor programmable temperature trip points and hysteresis options
  • Resistor tolerances contribute zero error
  • Hysteresis options: 5°C, 10°C and 20°C
• Dual outputs for overtemperature detection
  • Channel A (overtemperature-hot): +30 to +124°C, 2°C steps
  • Channel B (overtemperature-warm): +30 to +105°C, 5°C steps
• Accuracy level options (maximum at +30°C to +130°C):
  • A2 Level: ±3.0°C (±1.5°C from +30°C to +70°C)
  • A3 Level: ±3.5°C (±2.0°C from +30°C to +70°C)
• Ultra-low power consumption: 0.5 µA typical at 25°C
• Supply voltage: 1.62 to 5.5 V
• Open-drain outputs
• Trip test function enables in-system testing
• Available in a SOT-563 (1.60-mm × 1.20-mm),
  6-pin package

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The TMP392 device is part of a family of ultra-low power, dual channel, resistor programmable temperature switches that enable protection and detection of system thermal events from 30°C to 130°C. The TMP392 offers dual overtemperature (hot and warm) detection. The trip temperatures (T_TRIP) and thermal hysteresis (T_HYST) options are programmed by two E96-series resistors (1% tolerance) on the SETA and SETB pins. Channel A resistors can range from 1.05 KΩ to 909 KΩ, representing one of 48 unique values. Channel B resistors can range from 10.5 KΩ to 909 KΩ

The value of the resistor to ground on SETA input sets the T_TRIP threshold of Channel A. The value of the resistor to ground on SETB input sets the T_TRIP threshold of Channel B, as well as the T_HYST options of 5°C, or 10°C for both channels, to prevent undesired digital output switching. When the SETB input is connected to ground, Channel A operates with 20°C hysteresis. Resistors accuracy has no impact to T_TRIP accuracy.

To enable customer board-level manufacturing, the TMP392 supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin.