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General Description

The MAX3080E–MAX3089E are ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS-485/RS-422 communication that contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance).

The MAX3080E/MAX3081E/MAX3082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The MAX3083E/MAX3084E/MAX3085E offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086E/MAX3087E/ MAX3088Es’ driver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089E’s slew rate is

selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a single three-state driver. All devices feature enhanced ESD protection. All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model.

Features

?ESD Protection for RS-485 I/O Pins ±15kV, Human Body Model

?True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility

?Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission(MAX3080E–MAX3085E/MAX3089E)

?1nA Low-Current Shutdown Mode (Except MAX3081E/MAX3084E/MAX3087E)

?Pin-Selectable Full/Half-Duplex Operation (MAX3089E)

?Phase Controls to Correct for Twisted-Pair Reversal (MAX3089E)

?Allow Up to 256 Transceivers on the Bus

Applications

RS-422/RS-485 Communications

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks