MAX3491ECSD+

Overview

The MAX3491ECSD+ is a +3.3V-powered, full-duplex transceiver for RS-485 and RS-422 communications. It contains one driver and one receiver with ±15kV ESD protection on all I/O pins. The device supports data rates up to 12Mbps and operates from a single +3.3V supply without requiring a charge pump. It features a low-current shutdown mode drawing typically 2nA. Electrical specifications include a supply voltage range of 3.0V to 3.6V, a typical supply current of 2.2mA, and a common-mode input voltage range of -7V to +12V. The component is housed in a 14-pin SO package and operates within a temperature range of 0°C to +70°C.

Feature Summary

• Full-duplex communication capability with separate transmit and receive channels
• Integrated ±15kV electrostatic discharge protection on all transmitter outputs and receiver inputs
• Low-power shutdown mode significantly reduces standby current consumption
• Interoperable with +5V logic families while operating from a single +3.3V supply

Applications

• Telecommunications systems
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications
• Integrated services digital networks
• Packet switching environments

Procurement Notes

Verify the specific suffix 'CSD+' against official Analog Devices documentation to confirm the commercial temperature range (0°C to +70°C) and SO-14 surface-mount packaging configuration. Ensure compatibility with RoHS standards as indicated by the plus sign. Confirm availability status through authorized distributors, as lead times may vary based on production cycles.

Selection Notes

Select this component when full-duplex operation is required alongside high-speed data transmission up to 12Mbps. It is suitable for designs needing robust ESD protection and low standby power via shutdown mode. Verify that the system operates within the specified 3.0V to 3.6V supply range and that the 14-pin SO package fits the board layout constraints.

Part Context

This part belongs to the MAX3483E family of low-power transceivers designed for RS-485 and RS-422 protocols. Unlike half-duplex variants in the same series, the MAX3491E provides independent driver and receiver paths. It shares core electrical characteristics such as ESD protection and supply requirements with other family members but differs in duplex architecture and pin count.

Replacement Considerations

Publicly confirmed substitutes include the MAX3490ESA+ and ADM3488ARZ. These alternatives offer similar RS-485/RS-422 interface capabilities. Verify pinout compatibility and electrical specifications before substitution.