PCA9555RGER

I/o Expanders Overview

The PCA9555RGER is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. 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 16 configurable I/O lines, interrupt output capability, and configuration registers for setting input or output modes. It is housed in a VQFN-24 package suitable for surface mount applications. The component functions across an operating temperature range from -40 °C to +85 °C and includes ESD protection rated at 2 kV.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital input/output ports expandable via serial interfaces
• Supports interrupt-driven operation with dedicated output pin for event signaling
• Includes configuration registers allowing individual port direction control

I/o Expanders Applications

• Embedded systems requiring additional GPIO pins
• Industrial control panels needing remote I/O expansion
• Consumer electronics with limited microcontroller pins

I/o Expanders Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required packaging and environmental standards. Confirm that the VQFN-24 package dimensions match the target PCB footprint design. Check for any recent product change notices regarding lead-free compliance or moisture sensitivity levels before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when a system requires 16 additional digital I/O lines accessible via standard I2C or SMBus protocols. Ensure the host controller supports the required voltage levels and clock speeds. Consider the VQFN-24 package constraints during layout planning. Verify that the 2.3 V minimum supply voltage aligns with the system's power rails.

I/o Expanders Part Context

This part belongs to the PCA9555 series of remote I/O expanders from Texas Instruments. It shares functional similarities with the TCA9555 but differs in minimum operating voltage specifications. The RGER suffix indicates a specific reel-based packaging format intended for automated surface-mount assembly processes.

I/o Expanders Replacement Considerations

The TCA9555RGER serves as a functional substitute with similar interface capabilities, though it supports a lower minimum voltage of 1.65 V. Verify electrical compatibility and register mapping before substitution.