MAX3468EPA+

MAXIM INTEGRATED PRODUCTS  MAX3468EPA+  芯片, RS422/RS485 收发器, 30MBPS, 5.25V, DIP-8

The is a +5V, fail-safe, profibus RS485/RS422 transceiver in 8 pin DIP package. This high speed and half duplex differential bus transceiver is designed to meet TIA/EIA-422-B, TIA/EIA-485-A, V.11 and X.27 standards. It complies with profibus specification providing +2.1V minimum output level with 54ohm load and 40Mbps data rate. The MAX3468 contains one three state differential line driver and one differential input line receiver. The device operates from +5V supply and feature true fail-safe circuitry which provides logic high receiver output when receiver inputs are open or shorted. This enables all receiver outputs on a terminated bus to output logic highs when all transmitters are disabled. It has 1/4 standard unit load receiver input impedance that allows 128 transceivers on the bus. The driver and receiver has active-high and active-low enables respectively and can be connected together externally to serve as a direction control. It is used in level translators.

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Supply voltage range from 4.75V to 5.25V

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Operating temperature range from -40°C to 85°C

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15ns transmitter propagation delay and 20ns receiver propagation delay

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2ns transmitter and receiver skew

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Designed for multipoint transmissions on long or noisy bus lines

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High differential driver output level 2.1V on 54ohm

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1µA shutdown supply current and low supply current of 2.5mA

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Current limiting and thermal shutdown for driver overload protection

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Receiver/driver enable function, low power shutdown mode and hot swap function