MAX13451EAUD+

MAX13451EAUD+ is a half duplex, RS-485 transceiver. The resistor values are pin-selectable. A logic supply input allows interfacing to logic levels down to +1.8V. It features strong drivers specified to drive low-impedance lines found when a fully loaded bus, based on today’s 100 ohm characteristic impedance cable, is doubly terminated. This device allows slew-rate limiting of the driver output to reduce EMI and reflections for data rates up to 500kbps. This has a 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±30kV ESD using the human body model (HBM). Applications include industrial control systems, portable industrial equipment, motor control, security networks, and medical networks.

• Easy configuration of RS-485 networks up to 20Mbps (max) data rate
• Software/pin-selectable 100 ohm/120 ohm termination
• Integrated, switchable resistors eliminate the need for external resistors or DIP switches
• Driver drives 100 ohm double termination and supports Cat-5/Cat-6 and 24-AWG cables
• 1/8 unit load allows up to 256 transceivers on the bus
• Thermal and overcurrent protection, fail-safe receivers
• 4.5V to +5.5V supply voltage range
• Three-state output current at receiver is +0.01μA typ at 0V ≤ VRO ≤ VL
• 14 TSSOP-EP package
• Temperature range from -40°C to +125°C