The MAX485 is low-power transceivers for RS-485 and RS-  422 communication. IC contains one driver and one receiver.  The driver slew rates of the MAX485 is not limited, allowing  them to transmit up to 2.5Mbps.  

These transceivers draw between 120µA and 500µA of  supply current when unloaded or fully loaded with disabled  drivers. All parts operate from a single 5V supply. Drivers are  short-circuit current limited and are protected against  excessive power dissipation by thermal shutdown circuitry  that places the driver outputs into a high-impedance state.  

The receiver input has a fail-safe feature that guarantees a  logic-high output if the input is open circuit. The MAX485 is  designed for half-duplex applications.

The ST485 is low-power transceivers for RS-485 and RS- 422 communication. IC contains one driver and one receiver. The driver slew rates of the ST485 is not limited, allowing them to transmit up to 2.5Mbps. 

These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. All parts operate from a single 5V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. 

The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. The ST485 is designed for half-duplex applications.

The ST3485E is a 3.3V powered, half-duplex, low-power RS-485 transceiver that fully meets the requirements of the TIA/EIA-485 standard. 

The ST3485E includes a driver and a receiver, both of which can be independently enabled and disabled. When both are disabled, both the driver and the receiver output a high impedance state. 

The ST3485E has a 1/8 load that allows 256 ST3485E transceivers to be connected to the same communication bus. Error-free data transfer of up to 12Mbps is possible. 

The ST3485E operates from a voltage range of 3.0 to 3.6V and features fail-safe, over temperature protection, current limit protection, over-voltage protection, and other functions.

The MAX3485E is a 3.3V powered, half-duplex, low-power RS-485 transceiver that fully meets the  requirements of the TIA/EIA-485 standard. 

The MAX3485E includes a driver and a receiver, both of which can be independently enabled and  disabled. When both are disabled, both the driver and the receiver output a high impedance state. 

The  MAX3485E has a 1/8 load that allows 256 MAX3485E transceivers to be connected to the same communication bus. Error-free data transfer of up to 12Mbps is possible. 

The MAX3485E operates from a voltage range of 3.0 to 3.6V and features fail-safe, over temperature protection, current limit protection, over-voltage protection, and other functions.