MAX483ECSA+T

Overview

The MAX483ECSA+T is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply (4.75V to 5.25V) and features one driver and one receiver in an 8-SOIC package. The device supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. It provides ±15kV ESD protection on all pins, fail-safe receiver inputs, and thermal shutdown for the driver. In low-power shutdown mode, it consumes only 0.5µA. The operating temperature range is -40°C to +85°C.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and reflections.
• Integrated ±15kV ESD protection prevents latchup during handling.
• Fail-safe receiver guarantees logic-high output if input is open.
• Low-power shutdown mode significantly reduces standby current.

Applications

• Industrial-control local area networks
• EMI-sensitive communication applications
• Low-power RS-485 and RS-422 interfaces

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required package and temperature grade. Ensure the datasheet revision aligns with the production batch specifications before integration into the design.

Selection Notes

Select this component for half-duplex applications requiring robust ESD protection and low power consumption. The slew-rate limitation makes it suitable for longer cable runs where signal integrity is critical. Verify that the system voltage requirements match the specified +5V supply range.

Part Context

This part belongs to the MAX48xE family of low-power RS-485/RS-422 transceivers. It shares functional compatibility with standard versions but adds enhanced ESD protection. The 'E' suffix denotes extended temperature range capabilities, while 'C' indicates the commercial temperature variant within the broader product line.

Replacement Considerations

The MAX483EESA+T serves as a pin-compatible alternative with an extended temperature range (-40°C to +85°C). Other family members like the MAX481E or MAX487E offer different data rate or bus load characteristics but maintain similar interface functionality.

FAQ

How does the MAX483E handle short-circuit conditions?

The driver outputs are short-circuit current limited and protected by thermal shutdown circuitry, which places outputs in a high-impedance state if excessive power dissipation occurs.

What is the mechanism for entering low-power shutdown?

Shutdown is initiated by bringing the Receiver Enable (RE) pin high and the Driver Enable (DE) pin low simultaneously for at least 600ns.

Does the receiver have a fail-safe feature?

Yes, the receiver input has a fail-safe feature that guarantees a logic-high output if the input is left open circuit.