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UM488 - Slew-Rate-Limited RS-422 Transceivers

Description

The UM488/UM491 is ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS-422 communication that contain one driver and one receiver.

The UM491 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 UM488/UM491 offers higher driver output slew-rate limits, allowing transmit speeds up to 2.5Mbps. The device features enhanced ESD protection. All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model. These transceiver.

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Datasheet Details

Part number UM488
Manufacturer Union Semiconductor
File Size 328.90 KB
Description Slew-Rate-Limited RS-422 Transceivers
Datasheet download datasheet UM488 Datasheet

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Full PDF Text Transcription

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UM488/UM491 ±15kV ESD-Protected, Fail-Safe, Slew-Rate-Limited RS-422 Transceivers in SOP8/DIP8/SOP14/DIP14 General Description The UM488/UM491 is ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS-422 communication that contain one driver and one receiver. The UM491 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 UM488/UM491 offers higher driver output slew-rate limits, allowing transmit speeds up to 2.5Mbps. The device features enhanced ESD protection.
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