MAX3442EESA+

MAX3442EESA+ is a fault-protected RS-485 transceiver. It features ±60V protection from signal faults on communication bus lines. This device contains one differential line driver with three-state output and one differential line receiver with three-state input. The 1/4-unit load receiver input impedance allows up to 128 transceivers on a single bus. True fail-safe inputs guarantee a logic-high receiver output when the receiver inputs are open, shorted, or connected to an idle data line. Hot-swap circuitry eliminates false transitions on the data bus during circuit initialization or connection to a live backplane. Short-circuit current-limiting and thermal shutdown circuitry protect the driver against excessive power dissipation, and on-chip ±15kV ESD protection eliminates costly external protection devices. It is used in applications such as RS-422/RS-485 communications, industrial networks, telecommunications systems, HVAC controls.

• 0.25Mbps data rate, low power shutdown
• Receiver/driver enable, 128 transceiver on bus, hot swap
• Input receiver current is 250µA maximum at (VCC = GND, VA, B = 12V)
• Receiver input hysteresis is 12mV typical at (VCC = +4.75V to +5.25V)
• Receiver input resistance is 48Kohm minimum at (-7V ≤ VCM ≤ +12V)
• Supply current in normal operation is 30mA max at (no load, DI = VCC or GND)
• Supply current in shutdown mode is 10µA max at (VCC = +4.75V to +5.25V)
• Driver propagation delay is 2000ns maximum at (RL = 54ohm, CL = 50pF)
• Receiver propagation delay is 2000ns maximum at (CL = 20pF, VID = 2V, VCM = 0V)
• Operating temperature range from -40°C to +85°C, 8-pin SO package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party