PCA9543BPW,118

Specialized Overview

The PCA9543BPW,118 is a bidirectional translating switch controlled by the I2C-bus, featuring two downstream channels. It supports an operating supply voltage range of 2.3 V to 5.5 V and handles clock frequencies from 0 Hz to 400 kHz. The device includes active LOW interrupt inputs (INT0, INT1) and an interrupt output, alongside an active LOW reset input for bus recovery. It utilizes a TSSOP14 package with 14 leads and operates within an ambient temperature range of -40 °C to +85 °C.

Specialized Feature Summary

• Provides 1-of-2 bidirectional translating switches compatible with SMBus standards
• Includes two active LOW interrupt inputs and one active LOW interrupt output
• Features an active LOW reset input for recovering from stuck bus conditions
• Supports voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses

Specialized Applications

• Expanding I2C/SMBus networks with multiple slave devices
• Voltage level translation between different bus voltage domains
• Systems requiring hot insertion support without power-up glitches

Specialized Procurement Notes

Verify the specific ordering suffix ',118' corresponds to the TSSOP14 package in reel packing when sourcing. Confirm that the 'B' variant address map matches system requirements, as it differs from the 'A' version. Ensure pull-up resistors are correctly sized for the target bus capacitance and voltage levels.

Specialized Selection Notes

Select this component when dual-channel I2C switching with interrupt handling is required. The 'B' suffix indicates a fixed hardware address distinct from the 'A' version, useful for resolving address conflicts in larger systems. Verify that the TSSOP14 package dimensions fit the PCB layout constraints.

Specialized Part Context

This part belongs to the PCA9543A/43B family of 2-channel I2C-bus switches. The PCA9543BPW,118 specifically denotes the 'B' address variant housed in a TSSOP14 plastic thin shrink small outline package. It shares functional similarities with the PCA9543APW but uses a different slave address configuration.

Specialized Replacement Considerations

PCA9543APW,118 serves as a direct functional substitute, differing only in the fixed portion of the slave address. Ensure the system software or master controller is updated to recognize the alternative address byte if replacing the 'B' version with the 'A' version.