MAX211CDBR

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MAX211CDBR application field and working principle

The MAX211CDBR is a 10 Mbps universal asynchronous receiver-transmitter (UART) integrated circuit from Maxim Integrated. It can function as both a receiver and transmitter. It supports baud rates from 50 bps to 115.2 Kbps. It offers built-in capability to generate either a 1X (75%) or a 2X (56%) clock output on its XCTL pin.

The primary application of the MAX211CDBR is in embedded systems and portable electronic devices that need a low-voltage UART with support for low data rates. Nevertheless, it can also be used in industrial and automotive automation systems, as well as in communication systems such as modems, satellite-based systems, and cellular communication systems.

Working Principle of MAX211CDBR

The MAX211CDBR UART is designed to provide a simple method for transmitting and receiving digital information. It consists of a transmitter and receiver integrated on the same chip, along with a programmed baud rate generator. The data is communicated through either an asynchronous (start / stop) or synchronous (clock input) serial data format. The data is framed between a start bit and 1 or 2 stop bits. Data can be received in either a buffered mode or a non-buffered mode. The baud rate is software programmable for baud rates from 50 bps to 115.2 Kbps.

The MAX211CDBR supports both odd and even parity checking, as well as 7 and 8 data bits per character. The transmitter section is enabled by pulling the Enable (EN) pin high, while the receiver section is enabled by pulling the Receiver Enable (RE) pin high. The transmitter section contains a 128 x 8-bit transmit buffer that is loaded by the microcontroller. Transmitted characters are stored in the transmit buffer and then sent out serially, byte-by-byte. The receiver section contains a 32 x 8-bit receive buffer for storing received characters. When the receiver buffer is full, an Interrupt is generated, allowing the microcontroller to read the data.

Conclusion

The MAX211CDBR is a high-performance UART IC, manufactured with advanced CMOS process and is capable of operating at data rates of up to 115.2 Kbps. It is suitable for a wide range of applications, ranging from low-voltage embedded systems to industrial and automotive automation systems. It offers sophisticated features such as software programmable baud rates, data rates, and parity checking. It offers an effective solution for applications that require low-power operation, high noise immunity, and low power consumption.

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