MAX491EPD

Drivers, Receivers, Transceivers Overview

The MAX491EPD is a low-power, slew-rate-limited RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 5V supply with a voltage range of 4.75V to 5.25V and supports data rates up to 2.5Mbps. The device features one driver and one receiver in a 14-pin PDIP package. Key electrical parameters include a propagation delay of 60ns for the driver and 150ns for the receiver. It provides ±15kV ESD protection, thermal shutdown, and receiver fail-safe functionality. The operating temperature range spans from -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limiting to minimize electromagnetic interference (EMI) during signal transitions
• Integrated receiver fail-safe mechanism ensuring a high logic output state when inputs are open or floating
• Robust electrostatic discharge (ESD) protection rated at ±15kV for enhanced reliability in harsh environments

Drivers, Receivers, Transceivers Applications

• Industrial control local area networks
• Building automation systems
• Energy management systems requiring long-distance communication

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through authorized channels as the MAX491EPD is listed as obsolete or discontinued by the manufacturer. Confirm lead times and availability with suppliers, noting that stock may be limited or sourced from secondary markets. Ensure compliance with RoHS standards if required by specific project regulations before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex RS-485 or RS-422 communication with low power consumption. It is suitable for designs needing inherent EMI reduction via slew-rate limiting. Consider the 14-pin DIP package for through-hole mounting requirements. Verify that the 2.5Mbps data rate meets system speed requirements and that the 5V supply voltage aligns with the target power architecture.

Drivers, Receivers, Transceivers Part Context

The MAX491EPD belongs to the MAX481E/MAX483E/MAX485E/MAX487E-MAX491E series of low-power RS-485/RS-422 transceivers. This family is designed for robust data communication in electrically noisy industrial environments. The MAX491 variant specifically provides full-duplex operation, distinguishing it from half-duplex counterparts like the MAX485 within the same product line.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitute part numbers include MAX491EPD+ and other variants within the MAX491E series. Verify pin compatibility and electrical specifications against the original datasheet when evaluating alternatives.