BL3085E
General Description
TheBL3085E is a +/- 15kV electrostatic discharge (ESD) protected, high-speed transceiver for
RS-485 communication that contain 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 logic-high even if all transmitters on a
terminated bus are disabled. The BL3085E features reduced slew-rate driver that minimizes EMI
and reduces reflections caused by improperly terminated cables, allowing error-free data
transmission up to 500kbps. All transmitter outputs and receiver inputs are protected to +/- 15kV
using the Human Body Model. The transceiver typically draws 500 micron ampere of supply
current when unloaded, or when fully loaded with the driver disabled. All devices have a
1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The BL3085E
is intended for half-duplex communications.
Applications
RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial Control Local Area Networks
Energy Meter Networks
Power Inverters
Building Automation Networks
Telecommunications Equipment
I/O ESD
protection
Human Body Model:
±15kV
IEC 61000-4-2：
Contact discharge:
±15kV
Air discharge:
±20kV
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