PCA9518DBT

Specialized Overview

The PCA9518DBT is an expandable five-channel I2C hub manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 3.6 V and supports clock frequencies up to 400 kHz. The device is housed in a 20-pin SOIC package and functions as an interface I/O expander. It includes a dedicated reset pin for system control. The component is rated for operation between -40°C and +85°C, ensuring reliability in industrial environments.

Specialized Feature Summary

• Expandable architecture supporting multiple cascaded devices
• Integrated reset functionality for controlled initialization
• Bi-directional buffering for I2C signal integrity

Specialized Applications

• I2C bus expansion in embedded systems
• Signal buffering for high-capacitance loads
• Multi-device communication hubs

Specialized Procurement Notes

Verify the specific suffix 'DBT' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with the required operating temperature range and voltage levels before integration into the design.

Specialized Selection Notes

Select this component when a five-channel I2C hub with expandability is required. Confirm that the 20-pin SOIC package fits the PCB layout constraints. Verify that the 3 V to 3.6 V supply voltage aligns with the system power rails.

Specialized Part Context

This part belongs to the PCA9518 series of I2C hubs. It provides five channels for expanding I2C connectivity. The device isolates bus capacitance and improves signal quality. It is designed for applications requiring multiple slave devices on a single I2C bus.

Specialized Replacement Considerations

Check for direct equivalents such as the PCA9518DWT or other variants within the same family. Ensure any substitute maintains the same channel count, voltage range, and package dimensions.