PCA9541D/02,118

Specialized Overview

The PCA9541D/02,118 is a 2-to-1 I2C-bus master selector designed for high-reliability dual-master applications. It operates within an operating power supply voltage range of 2.3 V to 5.5 V and supports clock frequencies from 0 Hz to 400 kHz. The device features 6.0 V tolerant inputs and provides interrupt logic with reset capabilities. It utilizes the SO16 plastic small outline package (SOT109-1) and functions as a bidirectional master selector compatible with SMBus standards.

Specialized Feature Summary

• Provides 2-to-1 bidirectional master selection for I2C bus architectures
• Includes active LOW interrupt input and two active LOW interrupt outputs
• Supports bus initialization and recovery functions for downstream slave devices
• Enables voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses

Specialized Applications

• High reliability systems requiring dual masters
• Gatekeeper multiplexer on long single bus
• Bus initialization/recovery for slave devices without hardware reset
• Allowing masters without arbitration logic to share resources

Specialized Procurement Notes

Verify the specific ordering suffix /02 against official NXP documentation, as standard datasheets typically list /01 and /03 variants. Confirm package type matches the SO16 designation associated with the 'D' prefix. Ensure compatibility with system voltage requirements ranging from 2.3 V to 5.5 V before integration.

Specialized Selection Notes

Select this component when a failover mechanism is required for I2C bus masters. The device allows either master to gain control if the other fails or is removed. Consider the SO16 package constraints and ensure external pull-up resistors are provided for all channels, as internal pull-ups are not incorporated.

Specialized Part Context

This part belongs to the PCA9541 family of I2C bus master selectors manufactured by NXP Semiconductors. The family includes variants with different startup configurations and packages, such as TSSOP16 and HVQFN16. The 'D' suffix indicates the SO16 package, while the '/02' suffix denotes a specific configuration variant within the product line.

Specialized Replacement Considerations

PCA9541D/01, PCA9541D/03