diff --git a/components/mcp230xx.rst b/components/mcp230xx.rst
index ccaefdc46..07a34c44e 100644
--- a/components/mcp230xx.rst
+++ b/components/mcp230xx.rst
@@ -57,6 +57,9 @@ Configuration variables:
 - **id** (**Required**, :ref:`config-id`): The id to use for this MCP23008 component.
 - **address** (*Optional*, int): The I²C address of the driver.
   Defaults to ``0x20``.
+- **open_drain_interrupt** (*Optional*, bool): Configure the interrupt pin to open-drain mode.
+  Useful when the MCP23008's power supply is greater than 3.3 volts. Note that this pin
+  will require a pull-up resistor (to 3.3 volts) when this mode is enabled.
 
 .. _mcp23016-label:
 
@@ -158,6 +161,9 @@ Configuration variables:
 - **id** (**Required**, :ref:`config-id`): The id to use for this MCP23017 component.
 - **address** (*Optional*, int): The I²C address of the driver.
   Defaults to ``0x20``.
+- **open_drain_interrupt** (*Optional*, bool): Configure interrupt pins to open-drain mode.
+  Useful when the MCP23017's power supply is greater than 3.3 volts. Note that these pins
+  will require pull-up resistors (to 3.3 volts) when this mode is enabled.
 
 
 See Also