Analog Devices Inc./Maxim Integrated Tariff Inquiry

MAX491ECPD

MAX491ECPD Description

The MAX491ECPD from Analog Devices Inc./Maxim Integrated is a full-duplex RS-422/RS-485 transceiver designed for robust differential communication in industrial and embedded systems. Housed in a 14-pin DIP package, this through-hole-mount IC operates within a 4.75V to 5.25V supply range, supporting data rates up to 2.5Mbps. With 1 driver and 1 receiver, it ensures reliable signal transmission and reception, making it ideal for noise-prone environments. The device features 70mV receiver hysteresis, enhancing noise immunity and signal integrity. Although marked obsolete, it remains a viable choice for legacy systems requiring dependable serial communication.

MAX491ECPD Features

• Full-Duplex Operation: Enables simultaneous bidirectional data transmission, improving efficiency in point-to-point or multidrop networks.
• High Noise Immunity: 70mV receiver hysteresis minimizes errors in electrically noisy environments.
• Wide Supply Range: 4.75V–5.25V compatibility ensures stable performance across typical 5V systems.
• Robust Protocol Support: Compliant with RS-422 and RS-485 standards, suitable for long-distance communication (up to 1200 meters).
• Industrial Temperature Range: Operates from 0°C to 70°C, suitable for commercial and light industrial applications.
• Low Sensitivity to Moisture: MSL 1 (Unlimited) rating simplifies storage and handling.

MAX491ECPD Applications

• Industrial Automation: Used in PLCs, motor control, and sensor networks due to its noise-resistant design.
• Telecom Infrastructure: Ideal for legacy base stations and repeater systems requiring RS-485/422 compatibility.
• Embedded Systems: Deployed in legacy equipment where full-duplex communication is critical, such as medical devices or test instruments.
• Building Automation: Supports multidrop networks in HVAC and lighting control systems.

Conclusion of MAX491ECPD

The MAX491ECPD is a high-performance, full-duplex transceiver tailored for noise-immune, bidirectional communication in industrial and embedded applications. While obsolete, its 2.5Mbps data rate, hysteresis-enhanced receiver, and robust protocol support make it a reliable choice for maintaining or upgrading legacy systems. Engineers seeking a proven RS-422/485 solution with low moisture sensitivity and wide voltage tolerance will find this IC well-suited for demanding environments.