MAX3466ESD+T

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The MAX3466ESD+T is a low-power, low-voltage, full-duplex, RS-485/RS-422 transceiver. It is designed for interfacing between a data bus and other communications elements, such as a microcontroller or data acquisition device. The MAX3466ESD+T is an integrated solution that combines the RS-485 and RS-422 physical layers. It includes on-chip termination resistors (R T) and also offers several advantages over conventional RS-485 transceivers, such as reduced component count and improved noise immunity.

Application field

The MAX3466ESD+T is suitable for computer and communication data bus applications where full-duplex, differential, unshielded twisted-pair (UTP) cables are used. It can be used in a variety of RS-485 and RS-422 applications, such as printer interfaces, point-of-sale (POS) networks, and other low-power, low-voltage systems. The MAX3466ESD+T also offers enhanced noise immunity and reduced electromagnetic interference (EMI) over other RS-485 transceivers.

Working Principle

The MAX3466ESD+T features a differential receiver and driver, which is used to input and output the data. The differential receiver is designed to handle ±22V common-mode input voltages and provides enhanced noise immunity. The receiver output level is configured to accept either open-drain or 3-state interface logic. The driver is designed to be compatible with twisted-pair UTP cables. The output is designed to support an output V OH of at least 7V for ±14V power supplies, which allows for full level transition at UTP signal levels.

The MAX3466ESD+T also features on-chip termination resistors (R T). The termination resistor is connected to the RE, DE, and /RE pins. This helps to reduce power consumption by allowing the device to automatically control the termination resistor without the need for external circuitry. The R T values are user configurable and can be adjusted to match the frequency of the data transfer rate.

The MAX3466ESD+T advantages over traditional transceivers include enhanced noise immunity, reduced component count, low-voltage operation, and improved EMI immunity. The device is also capable of handling up to 9Mbps data rates, which makes it suitable for applications in POS networks, printers, and communication interfaces.

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