MAX487EESA+T

Product Summary

The MAX487EESA+T is a low－power transceiver for RS－485 and RS－422 communication. Each part contains one driver and one receiver. The MAX487EESA+T features reduced slew－rate 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 MAX487EESA+T 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. Additionally, the MAX487EESA+T has a low current shutdown mode in which they consume only 0.1μA. All parts operate from a single 5V supply. Driver is 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 MAX487EESA+T features quarter－unit－load receiver input impedance, allowing up to 128 MAX487EESA+T transceivers on the bus. Full－duplex communications are obtained using the MAX487EESA+T, while the MAX487EESA+T is designed for half duplex applications.

Parametrics

MAX487EESA+T 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 (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).

Features

MAX487EESA+T features: (1)For Fault－Tolerant Applications: MAX3430: ±80V Fault－Protected, Fail－Safe, 1/4 Unit Load, +3.3V, RS－485 Transceiver; MAX3440E–MAX3444E: ±15kV ESD－Protected, ±60V Fault－Protected, 10Mbps, Fail－Safe, RS－485/J1708 Transceivers; (2)For Space－Constrained Applications: MAX3460–MAX3464: +5V, Fail－Safe, 20Mbps, PROFIBUS RS－485/RS－422 Transceivers; MAX3362: +3.3V, High－Speed, RS－485/RS－422 Transceiver in a SOT23 Package; MAX3280E–MAX3284E: ±15kV ESD－Protected, 52Mbps, +3V to +5.5V, SOT23, RS－485/RS－422, True Fail－Safe Receivers; MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V, SOT23, RS－485/RS－422 Transmitters; (3)For Multiple Transceiver Applications: MAX3030E–MAX3033E: ±15kV ESD－Protected, +3.3V, Quad RS－422 Transmitters; (4)For Fail－Safe Applications: MAX3080–MAX3089: Fail－Safe, High－Speed (10Mbps), Slew－Rate－Limited RS－485/RS－422 Transceivers.

Diagrams