TCA9546ADR

Overview

The TCA9546ADR is a bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus applications. It provides four independent channels to expand I2C bus capacity or isolate devices with conflicting addresses. The device operates within a supply voltage range of 1.65 V to 5.5 V, ensuring compatibility with various logic levels. It supports standard mode (100 kHz) and fast mode (400 kHz) data rates. The component is housed in a 16-pin SOIC package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent bidirectional translating switches for I2C/SMBus expansion
• Supports multiple I2C address configurations via hardware pins
• Enables isolation between master and slave devices on shared buses

Applications

• Expanding I2C bus capacity in embedded systems
• Isolating I2C devices with duplicate addresses
• Level translation between different voltage domains in mixed-signal circuits

Procurement Notes

Verify the specific suffix 'ADR' corresponds to the SOIC-16 package and tape-and-reel packaging configuration as documented in the official datasheet. Confirm that the voltage range and interface specifications align with your system requirements before procurement. Ensure compliance with RoHS directives if applicable to your manufacturing standards.

Selection Notes

Select this component when four independent I2C channels are required for bus expansion or isolation. It is suitable for designs needing bidirectional level translation between 1.65 V and 5.5 V domains. Consider the SOIC-16 package constraints and thermal performance within the specified operating temperature range during PCB layout.

Part Context

This part belongs to the TCA9546A series of I2C switches from Texas Instruments. It serves as a solution for managing multiple I2C peripherals on a single bus line. The ADR suffix typically denotes the specific package type and reel quantity configuration offered by the manufacturer for surface-mount assembly processes.

Replacement Considerations

The PCA9546AD is a related component in the same family but may differ in packaging and specific electrical characteristics. Verify pinout compatibility and functional equivalence before substitution. Note that the PCA9546AD may be discontinued; check current availability and datasheet revisions for any parameter differences.