UM3491EESE

Drivers, Receivers, Transceivers Overview

The UM3491EESE is a low-power, full-duplex RS-422 transceiver manufactured by Union Semiconductor International Limited. It operates from a single 3.3V supply and features ±15kV ESD protection on all pins. The device includes fail-safe circuitry to ensure a high logic state at the receiver output when inputs are open. Packaged in SOP14 or DIP14 formats, it supports data rates up to 10 Mbps with low quiescent current consumption, making it suitable for battery-powered applications requiring robust serial communication interfaces.

Drivers, Receivers, Transceivers Feature Summary

• Integrated ±15kV ESD protection on driver and receiver I/O pins
• Fail-safe receiver design ensures high output state during input disconnect
• Low power consumption optimized for 3.3V operation
• Full-duplex signal transmission capability

Drivers, Receivers, Transceivers Applications

• Industrial control systems requiring isolated serial communication
• Portable battery-operated instrumentation
• Building automation networks
• Point-to-point RS-422 data links

Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer designation as Union Semiconductor International Limited against official component markings. Confirm package type availability (SOP14 vs DIP14) matches specific board layout requirements. Ensure ESD handling procedures are followed during assembly due to the sensitive internal protection structures integrated into the transceiver inputs.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a 3.3V powered RS-422 interface is required with high ESD immunity. Compare propagation delay specifications against system timing constraints. Verify that the SOP14 or DIP14 footprint aligns with existing PCB designs. Consider thermal dissipation limits if operating near maximum data rates in enclosed environments.

Drivers, Receivers, Transceivers Part Context

This transceiver belongs to the family of low-speed, low-power serial interface devices designed for reliable half-duplex or full-duplex communication over twisted pair lines. It serves as a physical layer solution for RS-422 standards, bridging microcontroller UARTs to differential bus networks while providing noise immunity and electrical isolation characteristics inherent to differential signaling.

Drivers, Receivers, Transceivers Replacement Considerations

Cross-reference with MAX3491EESD+ for pin-compatible alternatives offering similar 3.3V operation and ESD ratings. Verify functional equivalence regarding fail-safe thresholds and drive capabilities before substitution.