MAX483ECPA+

Overview

The MAX483ECPA+ is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver within an 8-pin Plastic DIP package. The device operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. Key electrical parameters include ±15kV ESD protection on all pins, a receiver input hysteresis of 70mV, and a no-load supply current of 120µA to 250µA. In shutdown mode, the supply current drops to 0.5µA. The component is rated for an operating temperature range of 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 both driver and receiver are disabled.
• Fail-safe receiver guarantees a logic-high output state if the differential input is open-circuited.

Applications

• Industrial-control local area networks
• EMI-sensitive applications requiring reduced signal harmonics
• Low-power RS-485 communication systems
• Level translators in harsh environments

Procurement Notes

Verify the ordering suffix 'CPA' corresponds to the Plastic DIP package and the commercial temperature range (0°C to +70°C). Confirm the manufacturer designation matches Analog Devices Inc. or Maxim Integrated. Ensure the component meets RoHS compliance standards as indicated by the '+' suffix. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component for half-duplex applications requiring robust ESD protection and low power consumption. The MAX483E variant is suitable where data rates do not exceed 250kbps and EMI reduction is critical. For full-duplex requirements, consider the MAX488E or MAX491E series. Verify that the thermal dissipation capabilities of the 8-pin DIP package meet the system's power budget under maximum load conditions.

Part Context

The MAX483ECPA+ belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers. This family shares common features such as ±15kV ESD protection and fail-safe receivers. The specific 'E' suffix denotes enhanced ESD protection compared to standard versions. The 'C' indicates the commercial temperature range, while 'PA' specifies the plastic DIP packaging format.

Replacement Considerations

Public confirmed substitute part numbers: MAX483EEPA+, MAX483ECSA+, MAX483EESA+. These variants share identical functionality but differ in temperature range or package type.

FAQ

How is the low-power shutdown mode activated?

Shutdown is initiated by bringing the Receiver Enable (RE) pin high and the Driver Enable (DE) pin low simultaneously. The device draws only 0.5µA in this state.

What is the purpose of the slew-rate limitation in the MAX483E?

The slew-rate limiting minimizes electromagnetic interference (EMI) and reduces signal reflections caused by improperly terminated cables, allowing error-free transmission at lower data rates.

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-circuited.