TCA6418EYFPR

Overview

The TCA6418EYFPR is an I2C-controlled 18-channel general-purpose input/output (GPIO) expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.65V to 3.6V and supports I2C serial communication interfaces. The device features configurable interrupt outputs for efficient host monitoring. It is housed in a 25-DSBGA package, suitable for surface-mount applications. The component functions as an interface between the system bus and peripheral devices, expanding available I/O lines while maintaining low power consumption characteristics typical of modern portable electronics.

Feature Summary

• Provides 18 configurable general-purpose digital input/output channels controlled via I2C protocol
• Supports flexible interrupt output configuration to notify the host processor of external events
• Operates with a wide supply voltage range compatible with various low-power logic families

Applications

• Portable audio and video devices requiring expanded I/O capabilities
• Personal Digital Assistants (PDAs) with limited pin counts
• Smartphone interface circuits needing additional control lines

Procurement Notes

Verify the specific suffix YFPR against the official datasheet to confirm the 25-DSBGA package type and operating temperature range. Ensure compatibility with the target I2C clock frequency and voltage levels before integration. Cross-reference the manufacturer's latest documentation for any assembly site changes or environmental compliance updates such as RoHS status.

Selection Notes

Select this component when an application requires more than 16 GPIO pins but cannot utilize parallel interfaces due to pin constraints. It is appropriate for systems using I2C buses that need dedicated interrupt handling for multiple peripherals. Consider the 25-DSBGA footprint availability during PCB layout design to ensure adequate space for the small outline package.

Part Context

This part belongs to the TCA6418 series of I/O expanders from Texas Instruments. It serves as a bridge between microcontrollers and external components, allowing system designers to add functionality without consuming additional MCU pins. The E variant typically denotes specific electrical characteristics or packaging options defined by the manufacturer for industrial and consumer electronics markets.

Replacement Considerations

Direct substitutes include other 18-channel I2C GPIO expanders from Texas Instruments or comparable vendors offering similar pin counts and interface protocols. Verify pin-to-pin compatibility and register mapping if replacing with parts from different manufacturers to avoid software redesign.