PCA9542APW/DG118

Specialized Overview

The PCA9542APW,118 is a dual-channel I2C-bus multiplexer manufactured by NXP Semiconductors. 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 low on-resistance and includes an active-low reset input for initialization. It is housed in a TSSOP-16 surface-mount package and functions across an industrial temperature range from -40°C to +85°C.

Specialized Feature Summary

• Dual-channel switching capability for connecting two downstream I2C buses to a single upstream host port
• Hardware-configurable address selection using dedicated A0 and A1 pins
• Integrated active-low reset function to initialize the switch state

Specialized Applications

• I2C bus expansion in embedded systems requiring multiple peripheral connections
• Signal routing in consumer electronics with limited I2C controller ports
• Industrial control interfaces managing distributed sensor networks

Specialized Procurement Notes

Verify the specific ordering code suffix against official NXP documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage levels and check for regional distribution restrictions before finalizing procurement plans.

Specialized Selection Notes

Select this component when a design requires isolating two distinct I2C segments while maintaining a single master connection. Confirm that the required channel count does not exceed two and that hardware address pin availability aligns with the board layout constraints.

Specialized Part Context

This part belongs to the PCA954xA series of I2C multiplexers designed for flexible bus topology management. It serves as a bridge between high-speed controllers and slower peripherals, enabling complex system architectures without additional protocol translation hardware.

Specialized Replacement Considerations

The PCA9542A is the direct functional equivalent. Verify pinout compatibility if substituting with other NXP multiplexer variants such as the PCA9544 or PCA9546.