PCA9546ADR

Specialized Overview

The PCA9546ADR is a bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus applications. It features four independent switches that allow multiple I2C or SMBus masters to share a single bus without address conflicts. The device operates within a supply voltage range of 2.3 V to 5.5 V and supports data rates up to 400 kHz. It is housed in a 16-pin SOIC package with a maximum on-resistance of 45 Ohms. The component functions across an operating temperature range from -40°C to +85°C, with a maximum power dissipation of 400 mW and a typical supply current of 12 µA.

Specialized Feature Summary

• Enables multiple I2C or SMBus masters to connect to a single bus by providing four independent switching channels.
• Supports bidirectional signal translation between different voltage domains within the specified operating range.
• Allows flexible configuration of slave addresses through dedicated control pins.

Specialized Applications

• Connecting multiple I2C masters to shared peripheral buses
• Isolating I2C segments to prevent address conflicts
• Level shifting between different voltage domains in mixed-signal systems

Specialized Procurement Notes

Verify the specific suffix 'ADR' corresponds to the SOIC-16 package and tape-and-reel packaging format as documented in official Texas Instruments datasheets. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into surface-mount assembly processes.

Specialized Selection Notes

Select this component when designing systems requiring isolation between multiple I2C masters or voltage domain translation. Ensure the required supply voltage falls within the 2.3 V to 5.5 V range and that the 45 Ohm on-resistance meets signal integrity requirements for the target bus speed.

Specialized Part Context

This part belongs to the PCA9546A series of bidirectional translating switches. It shares functional similarities with other I2C mux devices but is distinct in its four-channel architecture and specific voltage translation capabilities provided by Texas Instruments.

Specialized Replacement Considerations

The TCA9546ADR is a pin-compatible alternative offering similar functionality with potentially updated specifications. Verify electrical parameters and package dimensions before substitution.