PCA9547PW,112

Specialized Overview

The PCA9547PW,112 is an octal bidirectional translating multiplexer controlled by the I2C-bus. It fans out one upstream SCL/SDA pair to eight downstream pairs (channels), allowing only one channel to be selected at a time via a programmable control register. The device operates with a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies from 0 Hz to 400 kHz. It features an active LOW reset input for bus recovery and three address pins enabling up to eight devices on the same bus. Power-up defaults to Channel 0 connection. The TSSOP-24 package provides a body width of 4.4 mm.

Specialized Feature Summary

• Octal bidirectional translating multiplexer with I2C-bus interface
• Active LOW reset input for recovering from stuck bus conditions
• Voltage level translation capability between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
• Three hardware-selectable address pins for multi-device support

Specialized Applications

• Expanding I2C bus capacity in embedded systems
• Isolating I2C buses to prevent address conflicts
• Translating voltage levels between different bus segments

Specialized Procurement Notes

Verify the ordering suffix '112' corresponds to the tube packing method as specified in the official NXP documentation. Confirm that the component matches the TSSOP24 package variant rather than the reel-packed version. Ensure the procurement source provides valid traceability for the specific manufacturing lot.

Specialized Selection Notes

Select this part when an I2C multiplexer with voltage translation is required. The TSSOP24 package is suitable for surface mount applications requiring a 4.4 mm body width. Verify that the system design accommodates the 2.3 V to 5.5 V operating voltage range and utilizes external pull-up resistors for proper bus operation.

Specialized Part Context

This component belongs to the PCA9547 family of I2C-bus multiplexers manufactured by NXP Semiconductors. The family includes variants such as the PCA9547D and PCA9547BS, which offer alternative packaging options like SO24 and HVQFN24 while maintaining identical functional specifications.

Specialized Replacement Considerations

Direct replacements within the same family include PCA9547D and PCA9547BS. These parts share identical electrical characteristics but differ in physical package dimensions and mounting styles.