Description
UM3491EESE Union Low Power, ESD-Protected, Fail-Safe, RS-422 Transceivers 14-SOP RoHS
Product Attributes
Category Integrated Circuits (ICs)
Interface – Drivers, Receivers, Transceivers
Mfr Union Semiconductor (HK) Limited
Package Tape & Reel (TR)
Type Transceiver
Protocol RS422
Number of Drivers/Receivers 1/1
Duplex Full
Receiver Hysteresis
100 mV
Data Rate
10Mbps
Voltage – Supply
3.135V to 3.465V
Operating Temperature
-40C to 85C (TA)
Mounting Type
Surface Mount
Package / Case
14-SOIC (0.154″, 3.90mm Width)
Supplier Device Package
14-SOP
The UM3491EESE is a ±15kV electrostatic discharge (ESD)-protected, high-speed transceiver for RS-422 communication that contains one driver and one receiver. 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 UM3491EESE 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 unloaded, or when fully loaded with the drivers disabled.
The device has a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The UM3491EESE is intended for full-duplex communications.
Features
– ESD Protection for RS-422 I/O Pins
±15kV, Human Body Model
– True Fail-Safe Receiver while Maintaining EIA/TIA-422 Compatibility
– Maximum Data Rate up to 10Mbps
– Error-Free Data Transmission
– 1nA Low-Current Shutdown Mode
– Allow Up to 256 Transceivers on the Bus
Applications
– RS-422 Communications
– Level Translators
– Transceivers for EMI-Sensitive Applications
– Industrial-Control Local Area Networks
Manufacturer:Electronic Components
Datasheet:Others/UM3488-UM3491_Rev08.pdf
