MAX3491CSD+T

Overview

The MAX3491CSD+T is a low-power, full-duplex transceiver for RS-485 and RS-422 communication. It operates from a single 3.0V to 3.6V supply without requiring a charge pump. The device contains one driver and one receiver, supporting data rates up to 10Mbps. It features a 14-pin SO package with an operating temperature range of 0°C to +70°C. Electrical characteristics include a typical supply current of 2.2mA, a shutdown current of 2nA, and a driver propagation delay skew of 8ns maximum.

Feature Summary

• Full-duplex operation with independent driver and receiver enable controls
• Low-current shutdown mode activated by specific logic states on control pins
• Integrated thermal shutdown and short-circuit current limiting for driver protection
• Fail-safe receiver input that guarantees a high output state when inputs are open

Applications

• Telecommunications systems
• Industrial-control local area networks
• EMI-sensitive applications requiring reduced reflections

Procurement Notes

Verify the component against official Analog Devices documentation to confirm pinout compatibility and electrical specifications. Ensure the selected variant matches the required temperature grade and package type for the intended design environment.

Selection Notes

Select this component for designs requiring full-duplex RS-485 or RS-422 connectivity at speeds up to 10Mbps. It is suitable for 3.3V logic systems and offers low power consumption with a dedicated shutdown mode. Verify that the 14-pin SO package fits the board layout constraints.

Part Context

This part belongs to the MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491 family of 3.3V transceivers. It is distinguished by its full-duplex architecture and 14-pin configuration, contrasting with the half-duplex 8-pin variants in the same series.

Replacement Considerations

The MAX3490ESA serves as a functional substitute within the same family but utilizes an 8-pin package and lacks separate driver/receiver enable pins.