SN65C3222EPW

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Interface drivers, receivers and transceivers have become more essential in today\'s technology-driven world. The SN65C3222EPW is one of the many interface devices commonly used in various applications. This document will provide an overview of its application field and working principle.

Application Field

The SN65C3222EPW is a low-cost monolithic differential line driver. It is typically used to drive RS-485, RS-422 and RS-485/RS-232 line transceivers. The device has a wide range of applications, including:

• Fieldbus systems
• Industrial control systems
• HVAC control systems
• Motor control systems
• Security systems

It is also well suited for applications requiring EMI/RFI shielding, such as medical and aerospace.

Working Principle

The SN65C3222EPW operates by converting a single-ended input signal into a differential output signal, while also providing a level-shifting capability. It converts the input signal amplitude to a standard logic voltage level compatible with most logic families. The device also incorporates an output skew circuit that minimizes the difference in rise and fall times of the differential output signal.

The SN65C3222EPW has an −40 dB common-mode input signal rejection, which significantly reduces signal conditioning requirements and cost associated with plant cabling. It has an output switching capability of up to 250 mV and can provide up to 500 mV of differential output voltage. These features make the device well-suited for driving RS-485, RS-422 and RS-485/RS-232 line transceivers.

The SN65C3222EPW is available with four different power supply operating points, ranging from +3.3 V to +5 V, designed to meet a variety of application needs. It is also guaranteed over a temperature range from 0 to +85 degC, making it suitable for a wide range of environments. The device is ESD protected, and is certified according to the requirements of AEC-Q100.

Conclusion

The SN65C3222EPW is a reliable, low-cost interface device that is well suited for driving RS-485, RS-422 and RS-485/RS-232 line transceivers in a variety of applications. It has a wide range of features, including common-mode input signal rejection, output skew circuit, output switching capability and a variety of power supply operating points. It is also ESD protected, and certified according to the requirements of AEC-Q100.

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