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PDF BL3085E Data sheet ( Hoja de datos )
| Número de pieza | BL3085E | |
| Descripción | High-speed transceiver | |
| Fabricantes | BELLING | |
| Logotipo |  |
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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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1 page  
from
Shutdown-to-Output
High
Receiver Enable
from
Shutdown-to-Output
Low
t RZL(SHDN)
S2 closed
Figure 2, CL =100pF,
S1 closed
BL3085E
3500 ns
Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device ground
unless otherwise noted.
Note 2: ΔVOD and ΔVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: Maximum current level applies to peak current just prior to fold-back current limiting; minimum current level applies during
current limiting.
Note 4: The device is put into shutdown by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the
device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed to
have entered shutdown.
Typical Operating Characteristics
Function Tables
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5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet BL3085E.PDF ] | |
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