PCA9546APWRG4

Specialized Overview

The PCA9546APWRG4 is a quad bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus applications. It operates within a supply voltage range of 2.3 V to 5.5 V and supports data rates up to 400 kHz. The device features four independent channels with a maximum on-resistance of 45 Ohms and a maximum power dissipation of 400 mW. It functions across an operating temperature range from -40°C to +85°C and draws a maximum supply current of 12 µA. The component is housed in a 16-pin TSSOP package suitable for surface mount technology.

Specialized Feature Summary

• Provides four independent bidirectional translating switches controlled via the I2C bus
• Supports multiple downstream channel configurations through flexible addressing
• Enables level translation between different voltage domains for I2C/SMBus signals

Specialized Applications

• I2C bus expansion in embedded systems
• SMBus signal routing in industrial equipment
• Level shifting between mixed-voltage digital interfaces

Specialized Procurement Notes

Verify the specific suffix G4 against the manufacturer's official documentation to confirm lead-free compliance and RoHS status. Ensure the TSSOP-16 package dimensions match the target PCB footprint requirements. Confirm that the 2.3 V to 5.5 V operating voltage range aligns with the system's power supply rails before integration.

Specialized Selection Notes

Select this component when four isolated I2C or SMBus channels are required from a single upstream master. The 45 Ohm on-resistance specification must be evaluated against the bus capacitance limits to ensure signal integrity at 400 kHz speeds. Verify that the 12 µA supply current meets low-power design constraints for battery-operated devices.

Specialized Part Context

This part belongs to the PCA9546A series of bidirectional translating switches. It serves as a specialized interface solution for managing multiple I2C peripherals on shared buses. The device simplifies system architecture by allowing selective activation of downstream channels without requiring additional logic gates or complex multiplexing circuits.

Specialized Replacement Considerations

PCA9546AD offers equivalent functionality in a SOIC-16 package. PCA9546ARGVR provides the same electrical characteristics in a VQFN-16 package. Verify pin compatibility and thermal performance differences when substituting these variants.