MAX483ECPA

Overview

The MAX483ECPA is a low-power half-duplex transceiver for RS-485 and RS-422 communications, 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-pin Plastic DIP package. The device supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. It includes ±15kV ESD protection on all pins, thermal shutdown, short-circuit current limiting, and a fail-safe receiver input. The operating temperature range is 0°C to +70°C.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and reflections caused by improperly terminated cables.
• Integrated ±15kV electrostatic discharge protection on driver outputs and receiver inputs without latchup.
• Low-power shutdown mode reduces supply current consumption significantly when the device is disabled.
• Fail-safe receiver guarantees a logic-high output if the differential input is open circuit.

Applications

• Industrial-control local area networks
• Transceivers for EMI-sensitive applications
• Level translators

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required package type and temperature range. Ensure compliance with relevant environmental standards such as RoHS before finalizing procurement decisions.

Selection Notes

Select this component for half-duplex RS-485/RS-422 applications requiring reduced EMI due to its slew-rate limitation. It is suitable for environments where cost-effective low-power operation is prioritized over high-speed data transmission exceeding 250kbps. Ensure the system voltage aligns with the specified +5V supply requirement.

Part Context

This part belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers. Unlike the MAX485E which supports higher speeds, the MAX483E variant specifically incorporates slew-rate limiting to enhance signal integrity in noisy industrial environments while maintaining low power consumption.

Replacement Considerations

The MAX483EEPA serves as a direct replacement offering an extended temperature range (-40°C to +85°C). Other variants within the same family may differ in speed capabilities or duplex mode; verify functional compatibility before substitution.

FAQ

What is the maximum data rate supported by the MAX483ECPA?

The MAX483ECPA supports data rates up to 250kbbps due to its slew-rate-limited driver design.

How does the MAX483ECPA handle ESD events?

It provides ±15kV ESD protection on all pins using Human Body Model testing, ensuring no latchup occurs during static discharge events.

What is the purpose of the fail-safe feature in this transceiver?

The fail-safe receiver guarantees a logic-high output state if the differential input terminals are left open or disconnected.