MAX481EPA

Overview

The MAX481EPA is a low-power, half-duplex RS-485 transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates with a single 5 V supply and supports data transmission rates up to 2.5 Mb/s. The device features slew-rate-limited drivers to minimize electromagnetic interference (EMI) and includes 15 kV ESD protection on the bus pins. It integrates one driver and one receiver within an 8-pin PDIP package. Key electrical parameters include a maximum operating temperature of +70°C, a minimum of -40°C for industrial variants, and a quiescent current of 500 µA.

Feature Summary

• Slew-rate-limited drivers reduce high-frequency ringing and EMI emissions during signal transitions.
• Integrated 15 kV ESD protection safeguards the bus interface against electrostatic discharge events.
• Low-power design ensures minimal current consumption in both active and shutdown states.

Applications

• Industrial automation control systems requiring robust serial communication.
• Building automation networks utilizing RS-485 multi-drop configurations.
• Metering applications such as electricity or water utility monitoring devices.

Procurement Notes

Verify the specific suffix code to confirm the operating temperature range and package type, as variations exist within the MAX481 family. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check for obsolescence notices or lifecycle changes directly from Analog Devices to ensure long-term availability for production runs.

Selection Notes

Select this component when designing half-duplex RS-485 networks requiring moderate data rates up to 2.5 Mb/s. Ensure the system environment stays within the specified voltage and temperature limits. Consider the PDIP package constraints if PCB space allows, otherwise evaluate surface-mount alternatives like the SOIC variant for automated assembly requirements.

Part Context

This part belongs to the MAX481 series of low-power RS-485 transceivers. It shares functional similarities with the MAX485 but offers enhanced ESD protection and slew-rate limiting. The MAX481EPA specifically denotes the industrial temperature grade version housed in a standard plastic dual-in-line package, suitable for through-hole mounting.

Replacement Considerations

Direct pin-compatible substitutes include the MAX485EEPA for basic RS-485 functionality without ESD enhancements. For higher ESD tolerance, consider the MAX13487EPA. Verify that any replacement maintains the same 5 V supply requirement and half-duplex operation mode.