PCA9554AD,118

I/o Expanders Overview

The PCA9554AD,118 is an 8-bit I2C-bus and SMBus I/O expander manufactured by NXP Semiconductors. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features an open-drain interrupt output that activates when input states change. It includes three hardware address pins (A0, A1, A2) for bus configuration. The component is housed in a 16-lead SOIC package (SOT162-1) and functions across an ambient temperature range of -40 °C to +85 °C.

I/o Expanders Feature Summary

• Provides 8 bits of general-purpose parallel input/output expansion with individual pin configuration capabilities.
• Features an active LOW open-drain interrupt output to signal system masters regarding input state changes.
• Includes noise filters on SCL and SDA inputs to suppress spikes and ensures glitch-free operation upon power-up.

I/o Expanders Applications

• ACPI power switches
• Push buttons
• LEDs
• Fans

I/o Expanders Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. Confirm the manufacturer designation matches NXP Semiconductors specifications. Ensure the part number corresponds to the correct SOIC package variant. Validate compliance requirements prior to integration into final designs.

I/o Expanders Selection Notes

Select this component for applications requiring additional GPIO expansion over I2C or SMBus interfaces. Consider the PCA9554A variant if a different fixed slave address is required to accommodate more devices on the same bus. Verify software compatibility as enhancements necessitate changes compared to PCF8574 series devices.

I/o Expanders Part Context

This device belongs to the PCA9554 family developed to enhance NXP's I2C-bus I/O expander line. It offers higher drive capability and lower supply current compared to previous generations. The family supports multiple packages including SO16, SSOP16, TSSOP16, and HVQFN16 variants.

I/o Expanders Replacement Considerations

The PCA9554APW,118 serves as a direct functional substitute utilizing a TSSOP16 package instead of the SO16 form factor. Both components share identical electrical characteristics and register maps. Software migration requires review due to enhanced features not present in legacy parts like the PCF8574.