diff --git a/esphome/components/sx1509/sx1509.cpp b/esphome/components/sx1509/sx1509.cpp
index eb78a5ba324..ab2b8ac0365 100644
--- a/esphome/components/sx1509/sx1509.cpp
+++ b/esphome/components/sx1509/sx1509.cpp
@@ -347,8 +347,6 @@ void SX1509Component::enable_pin_interrupt_(uint8_t pin) {
   this->write_byte_16(REG_INTERRUPT_MASK_B, mask);
 
   // Configure sense to trigger on both edges
-  // Each sense register covers 4 pins with 2 bits per pin
-  static constexpr uint8_t SENSE_REGS[] = {REG_SENSE_LOW_A, REG_SENSE_HIGH_A, REG_SENSE_LOW_B, REG_SENSE_HIGH_B};
   uint8_t sense_reg = SENSE_REGS[pin / 4];
   uint8_t sense_val = 0;
   this->read_byte(sense_reg, &sense_val);
diff --git a/esphome/components/sx1509/sx1509_registers.h b/esphome/components/sx1509/sx1509_registers.h
index 6bddaf7694d..b83aecb7905 100644
--- a/esphome/components/sx1509/sx1509_registers.h
+++ b/esphome/components/sx1509/sx1509_registers.h
@@ -59,6 +59,8 @@ const uint8_t REG_SENSE_HIGH_A = 0x16;  //    RegSenseHighA Sense register for I
 const uint8_t REG_SENSE_LOW_A = 0x17;   //    RegSenseLowA Sense register for I/O[3:0] 0000 0000
 // Sense register values (2 bits per pin): 00=None, 01=Rising, 10=Falling, 11=Both
 const uint8_t SENSE_BOTH_EDGES = 0x03;
+// Sense register lookup: each register covers 4 pins (pins 0-3, 4-7, 8-11, 12-15)
+const uint8_t SENSE_REGS[] = {REG_SENSE_LOW_A, REG_SENSE_HIGH_A, REG_SENSE_LOW_B, REG_SENSE_HIGH_B};
 const uint8_t REG_INTERRUPT_SOURCE_B =
     0x18;  //    RegInterruptSourceB Interrupt source register _ I/O[15_8] (Bank B) 0000 0000
 const uint8_t REG_INTERRUPT_SOURCE_A =