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