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UM3491 - RS-422 Transceivers

This page provides the datasheet information for the UM3491, a member of the UM3488 RS-422 Transceivers family.

Datasheet Summary

Description

The UM3488/UM3491 is ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS-422 communication that contain one driver and one receiver.

The UM3491 contains an additional receiver and driver enable control.

Features

  • fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The UM3488/UM3491 allows transmit speeds up to 10Mbps. The device features enhanced ESD protection. All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model. These transceivers typically draw 180µA of supply current when u.

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Datasheet preview – UM3491

Datasheet Details

Part number UM3491
Manufacturer UniON Semiconductor
File Size 310.78 KB
Description RS-422 Transceivers
Datasheet download datasheet UM3491 Datasheet
Additional preview pages of the UM3491 datasheet.

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Full PDF Text Transcription

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UM3488/UM3491 +3.3V Low Power，±15kV ESD-Protected, Fail-Safe, RS-422 Transceivers UM3488EESA SOP8 UM3488EEPA DIP8 UM3491EESE SOP14 UM3491EEPE DIP14 General Description The UM3488/UM3491 is ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS-422 communication that contain one driver and one receiver. The UM3491 contains an additional receiver and driver enable control. The device features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The UM3488/UM3491 allows transmit speeds up to 10Mbps. The device features enhanced ESD protection.
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