MAX485EPA

Product Summary

The MAX485EPA is low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electrostatic discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX485EPA feature reduced slewrate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX485EPA is not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw as little as 120µA supply current when unloaded or when fully loaded with disabled drivers (see Selection Table). Additionally, the MAX485EPA has a low-current shutdown mode in which they consume only 0.5µA. 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 their 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.

Parametrics

Absolute maximum ratings: (1)Supply Voltage (VCC): 12V; (2)Control Input Voltage (RE, DE): -0.5V to (VCC + 0.5V); (3)Driver Input Voltage (DI): -0.5V to (VCC + 0.5V); (4)Driver Output Voltage (Y, Z; A, B): -8V to +12.5V; (5)Receiver Input Voltage (A, B): -8V to +12.5V; (6)Receiver Output Voltage (RO): -0.5V to (VCC + 0.5V); (7)8-Pin Plastic DIP (derate 9.09mW/℃ above +70℃): 727mW; (8)14-Pin Plastic DIP (derate 10.00mW/℃ above +70℃): 800mW; (9)8-Pin SO (derate 5.88mW/℃ above +70℃): 471mW; (10)14-Pin SO (derate 8.33mW/℃ above +70℃): 667mW; (11)Operating Temperature Ranges: -40℃ to +85℃; (12)Storage Temperature Range: -65℃ to +160℃; (13)Lead Temperature (soldering, 10sec): +300℃.

Features

Features: (1)ESD Protection: ±15kV—Human Body Model; (2)Low Quiescent Current:230μA (MAX1487E); (3)-7V to +12V Common-Mode Input Voltage Range; (4)Three-State Outputs; (5)30ns Propagation Delays, 5ns Skew; (6)Full-Duplex and Half-Duplex Versions Available; (7)Current Limiting and Thermal Shutdown for Driver Overload Protection.

Diagrams