MAX485ESA+T

ESD Protection for RS-485 ID Pins 15kV Human Body Model 15kV IEC61000-4-2, Air-Gap Discharge 8kV IEC61000-4-2, Contact Discharge 5V Supply Voltage Range Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission 1uA Low-Current Shutdown Mode -7V to +12V Common-Mode Input Voltage Range Allows up to 256 Transceivers on the Bus Thermal Shutdown Current-Limiting for Driver Overload Protection Data transmission up to 2.5Mbps The MAX485ESA+ are 5V powered, ±15kV ESD-protected, slew-rate-limited differential transceivers which provide full RS485 compatibility. Each part contains one driver and one receiver, which is designed for data transmission with extended common mode range (-7V to 12V). The MAX485ESA+ features slew-rate-limited driver which minimizes EMI and reduces reflections resulted from improperly terminated cables. The MAX485ESA+ also feature enhanced electrostatic discharge (ESD) protection. All of the transmitter outputs and receiver inputs are protected to ±15kV using IEC61000-4-2 Air-Gap Discharge, ±15kV using the Human Body Model and ±8kV using IEC61000-4-2 Contact Discharge. Drivers are short circuit current limited. When the driver outputs are placed into a high-impedance state by thermal shutdown circuitry, drivers are protected against excessive power dissipation. And the fail-safe feature of the receiver input guarantees a logic-high output if both inputs are open, shorted or idle. Both parts have power up/down mode, the glitch-free driver outputs permit live insertion or removal of the transceiver into/from the data bus. The CMOS design offers significant power savings without sacrificing ruggedness against overload or ESD damage. The typical quiescent current is only 300uA during operation and 1uA in shutdown mode. The MAX485ESA+ are intended for half-duplex communication and are available in SOP8 and DIP8 packages.

Applications

• Telecommunications
• Low-Power RS-485 Transceivers
• Integrated Services Digital Networks
• Industrial-Control
• Local Area Networks
• Transceivers for EMI-Sensitive Applications
• Packet Switching
• Level Translators

Key features

• ESD Protection for RS-485 ID Pins: 15kV Human Body Model, 15kV IEC61000-4-2 Air-Gap Discharge, 8kV IEC61000-4-2 Contact Discharge
• 5V Supply Voltage Range
• Enhanced Slew-Rate Limiting
• 1uA Low-Current Shutdown Mode
• -7V to +12V Common-Mode Input Voltage Range
• Allows up to 256 Transceivers on the Bus
• Thermal Shutdown Current-Limiting for Driver Overload Protection
• Data transmission up to 2.5Mbps
• Slew-rate-limited driver minimizes EMI and reduces reflections
• Enhanced electrostatic discharge (ESD) protection
• Drivers are short circuit current limited
• Fail-safe feature of the receiver input
• Power up/down mode
• Glitch-free driver outputs
• CMOS design offers power savings
• Typical quiescent current: 300uA during operation, 1uA in shutdown mode
• Intended for half-duplex communication
• Available in SOP8 and DIP8 packages