MCP9501 / 2 / 3 / 4 Temperature Switches

MCP9501 / 2 / 3 / 4 Temperature Switches

Microchip's MCP9501 / 2 / 3 / 4 family of devices includes temperature switches with ± 1°C (typical) accurate factory set output thresholds. These devices are ideal for high-power supply systems where an overtemperature protection circuit is needed. These devices do not require external components, consume 25 µA (typical), and factory-set thresholds provide simplicity.

In addition, the MCP9501 / 2 / 3 / 4 family of devices provides user selectable 2°C and 10°C (typical) switch hysteresis, and various output configurations. The MCP9501 / 2 outputs switch for rising temperatures while the MCP9503 / 4 switch for falling temperature, with the relative hysteresis at the set thresholds. This family of devices is also available with active-high push-pull and active-low open-drain outputs, the MCP9502 / 4 and the MCP9501 / 3, respectively. The push-pull output is ideal for a microcontroller interface while the open-drain output can be used for level shifting, wired-OR configuration, or as a heater ON / OFF switch.

The MCP9501 / 2 / 3 / 4 operates from 2.7 V to 5.5 V supply. This family is available with a space saving 5-lead SOT-23 package.

Features
  • Factory set temperature switch
  • Available temperature switch thresholds:
    • TSET = -35°C,-25°C, -15°C, -5°C, 5°C, 15°C, 25°C, 35°C, 45°C, 55°C, 65°C, 75°C, 85°C, 95°C, 105°C, 115°C, and 125°C
  • Wide operating voltage range: 2.7 V to 5.5 V
  • Temperature switch accuracy:
    • ±1°C (typ.)
    • ±4°C (max.) -15°C to +75°C: MCP9501 / 3 / 4
    • ±6°C (max.) -40°C to +125°C: MCP9501 / 3 / 4
  • Low supply current: 25 µA (typ.)
  • Switch threshold options (hot / cold):
    • Rising temperature: MCP9501 / 2 (hot option)
    • Falling temperature: MCP9503 / 4 (cold option)
  • Output configuration options:
    • Active low, open-drain output: MCP9501 / 3
    • Uses external pull-up resistor
    • Active-high, push-pull output: MCP9502 / 4
  • User selectable hysteresis: 2°C or 10°C (typ.)
  • 5-lead SOT-23 package

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