MAX1483ESA-T

Drivers, Receivers, Transceivers Overview

The MAX1483ESA-T is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply with a typical operating current of 20µA and features a low-power shutdown mode consuming 0.1µA. The device supports data rates up to 250kbps and includes slew-rate-limited drivers to minimize EMI. It offers a -7V to +12V common-mode input range, 1/8-unit-load impedance for up to 256 nodes, and driver protection via short-circuit current limiting and thermal shutdown.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited drivers reduce electromagnetic interference (EMI) and signal reflections on improperly terminated cables.
• Low-power operation with 20µA active current and 0.1µA shutdown current consumption.
• Fail-safe receiver guarantees a logic-high output when the differential inputs are left open.
• Driver overload protection through foldback current limiting and thermal shutdown circuitry.

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 and RS-422 communication networks
• Industrial control local area networks (LANs)
• Large multipoint bus systems supporting up to 256 transceivers
• EMI-sensitive applications requiring reduced signal reflections

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Confirm that the 'T' suffix indicates tape-and-reel packaging if required for automated assembly processes. Ensure compatibility with existing system voltage levels and interface requirements before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring low power consumption in RS-485 or RS-422 environments. The 1/8-unit-load specification allows for significantly higher node counts compared to standard transceivers. Verify that the half-duplex architecture aligns with the bidirectional communication needs of the target application.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX1482/MAX1483 family of low-power transceivers. While the MAX1482 provides full-duplex operation, the MAX1483 is configured for half-duplex use. Both share identical electrical characteristics regarding power consumption, data rates, and protection features, differing primarily in their duplexing capability.

Drivers, Receivers, Transceivers Replacement Considerations

Direct functional replacements within the same family include the MAX1482 for full-duplex requirements. Other Maxim Integrated RS-485 transceivers may serve as alternatives if pin compatibility and electrical specifications match, though feature sets like unit load count and shutdown currents should be verified.

Drivers, Receivers, Transceivers FAQ

How does the MAX1483 achieve low power consumption?

It draws only 20µA during normal operation and enters a low-power shutdown mode consuming 0.1µA when both the driver and receiver are disabled.

What is the maximum number of transceivers supported on the bus?

The 1/8-unit-load input impedance allows up to 256 transceivers to be connected on a single bus.

How is driver protection handled during faults?

The device uses foldback current limiting to protect against short circuits and thermal shutdown circuitry to force outputs to a high-impedance state if excessive die temperature occurs.