The NXP PCA9545D/G-T is a high-performance, 4-channel I2C-bus multiplexer with interrupt logic, designed to provide master devices with the ability to communicate with multiple I2C slave devices via a single I2C bus. This component is particularly useful in applications where there are more slave devices than can be supported by the standard I2C bus specification, or when multiple identical devices with the same address need to be accessed independently.

Key Features

• Multi-Channel I2C Switching: The PCA9545D/G-T allows for four downstream channels to be selected individually, enabling communication with one of several I2C slave devices connected to each channel.
• Interrupt Logic: Each channel has its own interrupt input which is aggregated to a master interrupt output, ensuring that the master device can respond to interrupts from any of the slaves without requiring constant polling.
• Compatibility: This multiplexer is compatible with I2C-bus specification and applications that require serial, 8-bit oriented, bi-directional data transfers.
• Low Standby Current: The PCA9545D/G-T is optimized for low power consumption, with a low standby current making it suitable for battery-powered and power-sensitive applications.
• Supply Voltage Range: It supports a wide range of supply voltages from 2.3V to 5.5V, providing flexibility for various system voltages.

Applications

This I2C multiplexer can be used in a variety of applications, including but not limited to:

• Server systems and data centers
• Embedded systems and IoT devices
• Industrial control and automation systems
• Consumer electronics
• Telecommunications equipment

Product Specifications

The NXP PCA9545D/G-T I2C multiplexer is a versatile solution that expands the capabilities of I2C communication in complex electronic systems, ensuring seamless and efficient connectivity among multiple I2C devices.