MAX3223CPP+

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The MAX3223CPP+ is an integrated, small-package, single driver and receiver with internal voltage level-shifting logic and integrated power-on reset (POR). This device is ideally suited for transferring data between low-voltage (3.3V) and higher-voltage (5V-level) logic families while achieving minimal power consumption. It provides differential drive on the driver side and a single-ended receiver that offers higher data rates and improved noise immunity.

The MAX3223CPP+ is a member of the MAX family of universal transmuxers. It can be used in a variety of applications, such as USB data transfer between a host PC and peripheral device, RS-232 to USB conversion, 5V to 3.3V level shifting, data transmission between mobile phones and PC peripherals, and data transmission from devices with integrated battery-level logic to devices with 5V logic.

Application Fields

The MAX3223CPP+ is a versatile device with applications ranging from datasheet specifications to board-level projects. It is ideal for USB data transfer between host and peripheral devices, like PCs, mobile phones, and PDAs. It is also useful as an RS-232 to USB converter and for level shifting between lower and higher voltage logic families, for example 5V to 3.3V level shifting. The integrated power-on reset function is an added advantage of this device, making it suitable for applications where power cycling is frequent. The rise and fall times of the driver have been reduced to minimize ringing. This makes it suitable for applications with high-capacitance loads. This device is also used in systems with integrated battery-level logic, like mobile phones, where data transmission to PC peripherals requires level shifting.

Working Principle

The MAX3223CPP+ is an integrated transceiver that performs bidirectional data transmission between two ports. One port is an open-collector/open-drain driver, and the other is a single-ended receiver. The driver side of the device has differential drive to reduce the ringing effect when used in close proximity to clocks. The receiver has a signal sensitivity of 1.3V, which is controlled by an internal 500-kΩ pull-up resistor.

The MAX3223CPP+ is powered by an external 5V power supply or a 3.3V supply. When powered with a 3.3V supply, it is able to accept inputs from both low-voltage (3V) and high-voltage (5V) logic families, thus enabling level shifting. When used with a 5V supply, the 3.3V logic can be accept directly.

The integrated power-on reset (POR) circuit helps the device reset itself to its default level whenever the power supply drops below the reset threshold. This helps to ensure data integrity. The rise and fall times of the driver are limited to reduce ringing, ensuring error-free data transmission. The device also offers a low power consumption and a high-speed data transmission.

Conclusion

In summary, the MAX3223CPP+ is an ideal choice for transferring data between low-voltage (3.3V) and higher-voltage (5V-level) logic families. It provides differential drive on the driver side for minimal ringing, and a single-ended receiver for improved noise immunity. It is suitable for applications such as USB data transfer between host and peripheral devices, RS-232 to USB conversions, 5V to 3.3V level shifting, and data transmission from devices with integrated battery-level logic to devices with 5V logic. It offers low power consumption, minimal ringing, and high-speed data transmission.

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