MAX3491EEPD

Overview

The MAX3491EEPD is a +3.3V, low-power, 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 operates from a single +3.3V supply without requiring a charge pump and supports data rates up to 12Mbps. It features a low-current shutdown mode drawing typically 2nA. The component is housed in a 14-pin Plastic DIP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Full-duplex communication capability with independent driver and receiver enable controls
• Integrated ±15kV electrostatic discharge protection on transmitter outputs and receiver inputs
• Low-power shutdown mode significantly reduces standby current consumption
• Fail-safe receiver guarantees a logic-high output when inputs are open

Applications

• Telecommunications systems
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications
• Integrated Services Digital Networks (ISDN)
• Packet switching environments

Procurement Notes

Verify the specific ordering suffix 'EEPD' to confirm the 14-pin PDIP package and industrial temperature range (-40°C to +85°C). Confirm RoHS compliance status as indicated by the '+' suffix. Check current production status as this family may be subject to discontinuation notices.

Selection Notes

Select the MAX3491E variant specifically for full-duplex requirements, distinguishing it from half-duplex models like the MAX3485E. Ensure the design utilizes a single +3.3V supply, as the device does not support higher voltage rails natively. Verify that the 12Mbps data rate requirement aligns with the system's bus topology and cable length constraints.

Part Context

The MAX3491E belongs to the MAX3483E family of 3.3V transceivers designed for RS-485 and RS-422 standards. Unlike the half-duplex members of this series, the MAX3491E provides simultaneous transmission and reception. It shares common interface characteristics with other family members but offers distinct pinout compatibility for full-duplex implementations.

Replacement Considerations

Public confirmed substitute part numbers: ADM3491EARZ.