MAX1483ESA

Drivers, Receivers, Transceivers Overview

The MAX1483ESA 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 voltage range of 4.75V to 5.25V and draws only 20µA of operating current. The device supports data rates up to 250kbps and features slew-rate-limited drivers to minimize EMI. It includes a low-current shutdown mode consuming 0.1µA, thermal shutdown protection, and short-circuit current limiting. The receiver input impedance is 1/8-unit-load (96kΩ), allowing up to 256 transceivers on the bus. It operates within a temperature range of -40°C to +85°C and is housed in an 8-pin SO package.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited drivers reduce electromagnetic interference and signal reflections.
• Low-power operation with 20µA active current and 0.1µA shutdown current.
• 1/8-unit-load receiver input impedance supports large network topologies.
• Integrated thermal shutdown and short-circuit current limiting for driver protection.

Drivers, Receivers, Transceivers Applications

• Low-power RS-485/RS-422 communication networks
• EMI-sensitive industrial applications
• Industrial-control local area networks
• Large node count LANs requiring up to 256 devices

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the package type and temperature range. The 'ESA' designation indicates an 8-pin SO package with an extended temperature range of -40°C to +85°C. Ensure compatibility with system power rails and logic levels before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring low power consumption and high noise immunity in RS-485 or RS-422 environments. The slew-rate limitation makes it suitable for long cable runs where standard transceivers might cause excessive ringing. Verify that the half-duplex architecture meets the bidirectional communication requirements of the application.

Drivers, Receivers, Transceivers Part Context

The MAX1483ESA belongs to the MAX1482/MAX1483 family of low-power, 1/8-unit-load RS-485 transceivers. While the MAX1482 provides full-duplex capability, the MAX1483 offers half-duplex functionality. Both share identical electrical characteristics regarding power consumption, protection features, and data rate limits.

Drivers, Receivers, Transceivers Replacement Considerations

Direct functional replacements include other Maxim Integrated RS-485 transceivers with similar 1/8-unit-load specifications and slew-rate limiting, such as the MAX1483CSA (commercial grade) or MAX1483CUA (µMAX package). Cross-vendor equivalents must match the 250kbps data rate and 5V supply constraints.

Drivers, Receivers, Transceivers FAQ

How does the MAX1483 handle open-circuit receiver inputs?

The receiver input features a fail-safe design that guarantees a logic-high output if the A and B inputs are left open circuit.

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

Due to the 1/8-unit-load input impedance, the MAX1483 allows up to 256 transceivers to be connected on the same bus.

How is the low-power shutdown mode activated?

Shutdown is initiated by bringing the RE pin high and the DE pin low simultaneously for at least 600ns.