The maximum cable length supported by the MAX485EESA is approximately 4000 feet (1219 meters) at a data rate of 10 kbps. However, this length can vary depending on the specific application, cable quality, and noise environment.
To ensure reliable communication in noisy environments, it is recommended to use a shielded twisted-pair cable, keep the cable length as short as possible, and use a common-mode choke or ferrite bead to filter out electromagnetic interference (EMI). Additionally, consider using a transceiver with built-in noise filtering and slew-rate limiting, such as the MAX485EESA.
The MAX485EESA is a enhanced version of the MAX485. The main differences are that the MAX485EESA has a higher data rate (up to 10 Mbps), a lower supply current (65 mA), and a wider operating temperature range (-40°C to +85°C). The MAX485EESA also has improved ESD protection and a reduced jitter specification.
The MAX485EESA can be easily interfaced with a microcontroller using a UART (Universal Asynchronous Receiver-Transmitter) interface. The MAX485EESA's transmit (TX) and receive (RX) pins are connected to the microcontroller's UART TX and RX pins, respectively. The microcontroller's UART should be configured to match the baud rate, data bits, parity, and stop bits of the MAX485EESA.
The enable (EN) pin is used to enable or disable the MAX485EESA's transmitter. When the EN pin is high, the transmitter is enabled, and when it is low, the transmitter is disabled. This pin can be used to control the transmitter's power consumption or to implement a half-duplex communication protocol.
MAX485EESA datasheet
by Maxim Integrated Products
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