MAX481ECPA

Overview

The MAX481ECPA is a low-power RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It contains one driver and one receiver, operating from a single +5V supply with a maximum data rate of 2.5Mbps. The device features ±15kV ESD protection on all pins without latchup. It operates within a temperature range of 0°C to +70°C and is housed in an 8-pin Plastic DIP package. Supply current is typically 120µA when unloaded or disabled.

Feature Summary

• Provides ±15kV electrostatic discharge (ESD) protection on driver outputs and receiver inputs without latchup.
• Includes a low-current shutdown mode consuming only 0.5µA for the MAX481E variant.
• Features thermal shutdown circuitry that places outputs into a high-impedance state during excessive power dissipation.
• Receiver input includes a fail-safe feature guaranteeing a logic-high output if the input is open circuit.

Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Level Translators
• Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks

Procurement Notes

Verify the specific ordering suffix 'CPA' corresponds to the 8-pin Plastic DIP package and the commercial temperature range of 0°C to +70°C. Confirm compatibility with the standard non-E versions if ESD protection requirements differ. Ensure the component meets RoHS standards as indicated by the manufacturer's documentation.

Selection Notes

Select this component for half-duplex applications requiring up to 2.5Mbps transmission speeds. It is suitable for harsh environments due to its robust ESD protection. Consider alternative models like the MAX483E if reduced slew rates are needed to minimize EMI at lower data rates up to 250kbps.

Part Context

The MAX481ECPA belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E family of low-power transceivers designed for RS-485 and RS-422 communications. This family provides rugged performance for harsh environments, eliminating the need for external transient suppressor diodes.

Replacement Considerations

The standard MAX481CPA is pin-and-function compatible but lacks the enhanced ±15kV ESD protection found in the MAX481E series. Verify if the application requires the specific ESD ratings provided by the 'E' designation.