UM3491 Datasheet RS-422 Transceivers

Manufacturer: Union Semiconductor

Download the UM3491 datasheet PDF. This datasheet also includes the UM3488 variant, as both parts are published together in a single manufacturer document.

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UM3491 rs-422 transceivers by Union Semiconductor - Datasheet Preview — Note: The manufacturer provides a single datasheet file (UM3488-UnionSemiconductor.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number	UM3491
Manufacturer	Union Semiconductor
File Size	310.78 KB
Description	RS-422 Transceivers
Datasheet	UM3491 Datasheet

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

Overview

UM3488/UM3491 +3.3V Low Power，±15kV ESD-Protected, Fail-Safe, RS-422 Transceivers UM3488EESA SOP8 UM3488EEPA DIP8 UM3491EESE SOP14 UM3491EEPE DIP14.

Key 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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