PCA9544ADGVR

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PCA9544ADGVR is a 8-bit I2C multiplexer using low-voltage CMOS logic for a variety of port independent I2C applications, such as powering and communicating with a variety of I2C devices from the same I2C bus. It has a single simple control pin, capable of selecting up to four ports, providing a simple means of switching system and mixed sensor control. The device provides multiplexing with efficient power management that simplifies board design.

As one of Texas Instruments’ (TI) channel selection devices, the PCA9544ADGVR is designed to help save board space and reduce costs. This cost and space savings comes with the knowing that device performance is not compromised, because the device easily interfaces 5V and 3V I2C applications while providing high noise immunity and input port switching. Additionally, the device provides a low active-mode supply current of 1 μA and a low standby-mode supply current of 700 nA.

The PCA9544ADGVR offers a variety of features and functionality for I2C port independent communication. This device provides for a user-programmable option for using multiple devices on a single I2C bus. It allows for the design of a master device to be able to switch between four I2C devices and port numbers on the same bus, eliminating the need for additional wires and multiple pins. This device also supports hot-swapping of I2C devices from the same bus, providing flexibility when designing and testing with multiple I2C devices. Additionally, this device provides an effective power management solution with low standby supply current, 1.7V to 5.5V operating voltage range, 1 μA active-mode current, and over-voltage and short-circuit protection.

The most noteworthy feature of the PCA9544ADGVR is its ability to efficiently switch between four I2C ports. This device is capable of switching between ports on the same I2C bus, allowing for the ability to use multiple I2C devices. This device utilizes a single, low-voltage CMOS logic signal to select between ports on the same bus. The PCA9544ADGVR is operable in both single-channel and dual-channel mode, with either a single port or two ports being selected at any one time. Additionally, the device utilizes an input port switching circuit to provide an opto-isolation barrier between the selected port and the device.

The PCA9544ADGVR offers an easy way to implement an efficient power management solution for I2C applications. With a low active-mode supply current of 1 μA, and a low standby-mode supply current of 700 nA, the device helps reduce power consumption in a variety of I2C applications. The device also provides an over-voltage and short-circuit protection with a maximum current rating of 140 mA. Additionally, the device is operable with both 5V and 3V applications, allowing for the selection of the appropriate voltage for the application being developed.

In summary, the PCA9544ADGVR offers an easy and compact way to interface multiple I2C devices on a single I2C bus. With its low voltage logic and easy port selection, the device provides an efficient power management solution in a variety of I2C applications. The device is also operable in both single-channel and dual-channel modes and with 5V or 3V applications, allowing for the selection of the appropriate voltage for the application being developed. Additionally, the device provides an effective power management solution with low active-mode supply current and low power standby-mode current.

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