PCA9548ADBG4

Specialized Overview

The PCA9548ADBG4 is an 8-channel I2C and SMBus multiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum on-resistance of 45 Ohms. The device functions across an extended temperature range from -40°C to +85°C, drawing a maximum power supply current of 80 µA. It utilizes bidirectional translating switches to facilitate communication between multiple I2C masters and slaves. The component is housed in a TSSOP-16 surface-mount package, designed for compact circuit board integration.

Specialized Feature Summary

• Provides eight independent channels for switching I2C and SMBus signals
• Supports bidirectional level translation between different bus voltage domains
• Includes a reset function to initialize switch states upon power-up

Specialized Applications

• Multiplexing multiple I2C sensors or peripherals onto a single controller bus
• Isolating I2C buses with different voltage levels in mixed-signal systems
• Expanding I2C address space in embedded control applications

Specialized Procurement Notes

Verify the specific suffix 'DB' against official manufacturer documentation to confirm the exact package type and tape-and-reel specifications. Ensure compliance with RoHS directives as indicated in the product data sheet. Confirm availability status directly with authorized distributors, as lifecycle stages may affect long-term sourcing options.

Specialized Selection Notes

Select this component when eight distinct I2C channels are required within a limited footprint. The TSSOP-16 package offers a balance of pin count and board area efficiency. Verify that the system voltage requirements fall within the 2.3 V to 5.5 V operating range and that the thermal environment remains within the specified -40°C to +85°C limits.

Specialized Part Context

This part belongs to the PCA9548A family of I2C switches. It shares core functionality with variants like the PCA9548APWR but differs in packaging. The 'G4' suffix typically denotes lead-free and RoHS-compliant manufacturing standards consistent with Texas Instruments' environmental policies for active components.

Specialized Replacement Considerations

Direct substitutes include the PCA9548APWR and PCA9548ARGER. Verify pin compatibility and package dimensions before substitution. The TCA9548A series offers similar functionality but requires verification of the lower voltage support (1.65 V) if applicable.