diff --git a/esphome/components/pca9554/pca9554.cpp b/esphome/components/pca9554/pca9554.cpp
index b0a12b6c45..e8d49f66e2 100644
--- a/esphome/components/pca9554/pca9554.cpp
+++ b/esphome/components/pca9554/pca9554.cpp
@@ -53,17 +53,17 @@ void PCA9554Component::dump_config() {
   }
 }
 
-bool PCA9554Component::digital_read_hw(uint16_t pin) {
+bool PCA9554Component::digital_read_hw(uint8_t pin) {
   // Read all pins from hardware into input_mask_
   return this->read_inputs_();  // Return true if I2C read succeeded, false on error
 }
 
-bool PCA9554Component::digital_read_cache(uint16_t pin) {
+bool PCA9554Component::digital_read_cache(uint8_t pin) {
   // Return the cached pin state from input_mask_
   return this->input_mask_ & (1 << pin);
 }
 
-void PCA9554Component::digital_write_hw(uint16_t pin, bool value) {
+void PCA9554Component::digital_write_hw(uint8_t pin, bool value) {
   if (value) {
     this->output_mask_ |= (1 << pin);
   } else {
diff --git a/esphome/components/pca9554/pca9554.h b/esphome/components/pca9554/pca9554.h
index dd5154f0a1..7b356b4068 100644
--- a/esphome/components/pca9554/pca9554.h
+++ b/esphome/components/pca9554/pca9554.h
@@ -34,9 +34,9 @@ class PCA9554Component : public Component,
   bool write_register_(uint8_t reg, uint16_t value);
 
   // Virtual methods from CachedGpioExpander
-  bool digital_read_hw(uint16_t pin) override;
-  bool digital_read_cache(uint16_t pin) override;
-  void digital_write_hw(uint16_t pin, bool value) override;
+  bool digital_read_hw(uint8_t pin) override;
+  bool digital_read_cache(uint8_t pin) override;
+  void digital_write_hw(uint8_t pin, bool value) override;
 
   /// number of bits the expander has
   size_t pin_count_{8};