PCA9548ADB

Specialized Overview

The PCA9548ADB is an 8-channel bidirectional translating I2C switch 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 a maximum on-resistance of 45 Ohms and a maximum power supply current of 80 uA. It functions across a temperature range from -40°C to +85°C. The component is housed in a TSSOP-24 package, designed for surface mount installation.

Specialized Feature Summary

• Provides eight independent channels for routing I2C signals between upstream and downstream buses.
• Enables bidirectional voltage level translation between different bus voltage domains without external components.
• Includes a low-active reset input to recover from stuck I2C buses and reset internal state machines.

Specialized Applications

• Expanding I2C connectivity in embedded systems with multiple slave devices.
• Voltage level shifting between 1.8V, 2.5V, 3.3V, and 5V logic domains.
• Resolving I2C address conflicts by isolating devices with identical addresses onto separate channels.

Specialized Procurement Notes

Verify the specific suffix 'DB' against official Texas Instruments documentation to confirm the exact package type and tape/reel specifications. Ensure compatibility with the target PCB footprint and soldering profile requirements before finalizing procurement orders.

Specialized Selection Notes

Select this component when an application requires switching between multiple I2C buses or isolating devices with conflicting addresses. Consider the 2.3V to 5.5V operating range and the TSSOP-24 package constraints relative to available board space and thermal management capabilities.

Specialized Part Context

This part belongs to the PCA9548A family of I2C switches. It shares functional similarities with other variants like the PCA9548APWR but differs in packaging and potentially ordering suffixes. It serves as a core interface solution for managing complex I2C networks in industrial and consumer electronics.

Specialized Replacement Considerations

The PCA9548ADWR is a documented direct replacement variant offered by Texas Instruments. Verify pinout and electrical parameter equivalence before substituting.