MAX3087 Datasheet

• For Fault-Tolerant Applications:
  MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4- Unit Load, +3.3V RS-485 Transceiver
• For Low-Voltage Applications:
  MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package
• For Multiple Transceiver Applications:
  MAX3030E-MAX3033E: ±15kV ESD-Protected, +3.3V, Quad, RS-422 Transmitters
  MAX3040-MAX3045: ±10kV ESD-Protected, Quad, +5V, RS-485/RS-422 Transmitters

• Industrial-Control Local Area Networks
• Level Translators
• RS-422/RS-485 Communications
• Transceivers for EMI-Sensitive Applications

The MAX3087 high-speed transceivers for RS-485/RS-422 communication 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 MAX3087's driver slew rates are not limited, making transmit speeds up to 10Mbps possible.

These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.

All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3087 are intended for full-duplex communications. It also features independently programmable receiver and transmitter output phase via separate pins.