PCA9542APW/DG,118

Specialized Overview

The PCA9542APW/DG,118 is a 1-of-2 bidirectional translating multiplexer controlled via the I2C-bus. It fans out one upstream SCL/SDA pair to two downstream SCx/SDx pairs. The device supports an operating power supply voltage range of 2.3 V to 5.5 V and allows voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses. It features three hardware address pins (A0, A1, A2) allowing up to eight devices on the bus. The component includes two active LOW interrupt inputs (INT0, INT1) and one active LOW interrupt output (INT). It operates with a clock frequency of 0 Hz to 400 kHz and provides ESD protection exceeding 2000 V HBM.

Specialized Feature Summary

• Bidirectional translating multiplexer for I2C/SMBus applications
• Hardware selectable addressing for multi-device systems
• Integrated interrupt logic for event-driven monitoring
• Voltage level translation capability across multiple bus standards

Specialized Applications

• I2C bus expansion in embedded systems
• Resolving I2C address conflicts between identical peripherals
• Managing interrupts from multiple downstream slave devices
• Interfacing low-voltage components with 5V tolerant buses

Specialized Procurement Notes

Verify the package type matches the design requirements, as this part number corresponds to the TSSOP14 variant. Confirm that the ordering suffix indicates the correct reel packing method for automated assembly processes. Ensure the ambient temperature range meets the specific operational constraints of the target application environment before finalizing procurement.

Specialized Selection Notes

Select this component when system architecture requires isolating distinct I2C segments while maintaining centralized control. It is suitable for designs needing to bridge different voltage domains without external level shifters. Consider the pin count and interrupt capabilities if managing multiple sensors or memory devices sharing a single master controller interface.

Specialized Part Context

This component belongs to the PCA954X family of I2C/SMBus multiplexers and switches manufactured by NXP Semiconductors. It serves as a specialized interface solution for expanding bus capacity and managing signal integrity in complex digital systems. The device integrates switch control logic and interrupt handling within a compact surface-mount package.

Specialized Replacement Considerations

PCA9542AD,118 offers the same functionality in an SO14 package instead of TSSOP14.