MAX3485EDTR(XBLW)

MAX3485 is 3V to 5.5V power supply, ±15kV anti-static slow limit differential transceiver and can provide complete RS485 compatibility for half-duplex applications. Each section contains a driver and a receiver designed for data transmission over an extended common-mode range (-7V to +12V). It can effectively transmit data at a high rate of up to 15Mbps. The MAX3485 series also features enhanced ESD protection function. By using IEC61000-4-2 air gap discharge, the all-transmitter output and receiver input are protected to ±15kV. If adopting HBM, the protection can be ±15kV adopting the IEC61000-4-2 contact discharge protection, the protection can be ±8kV Drive short-circuit current is limited. When the driver output is placed in a high impedance state through a thermal shutdown circuit, the driver can prevent excessive power consumption. The receiver (RX) input has a “Fail safe" design that ensures a logically high Rx output when the RX input is floating, shorted, or terminated but not driven. Both components have power-on/off modes, and fault-free driver outputs allow transceivers to be inserted or removed from bus in real time. CMOS designs aim to offer significant power savings without sacrificing overload or ESD damage. Typically, static current is only 300uA in operation and 1uA in shutdown mode.

Applications

• Power communication
• Integrated digital network
• Industrial control local area network
• Power measurement (smart meter)
• Factory automation and control

Key features

• High communication rate, 3.0V ~ 5.5V power supply 15Mbps
• High ESD protection
• Low power consumption down to 1uA, shutdown mode
• Input voltage range: -7V to +12V (common mode)
• Bus connection up to 256 nodes
• Thermal shutdown protection function
• Drive overload protection function
• Full fault-safe (open circuit, short circuit, etc.)