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參數(shù)資料
| 型號： | HWD490CSA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | RS-485 |
| 英文描述： | Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 中文描述： | 低功耗，限擺率限制RS-485/RS-422收發(fā)器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 502K |
| 代理商： | HWD490CSA |
General Desc ription
The HWD481, HWD483, HWD485, HWD487–HWD491, and
HWD1487 are low-power transceivers for RS-485 and RS-
422 communication. Each part contains one driver and one
receiver. The HWD483, HWD487, HWD488, and HWD489
feature reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated cables,
thus allowing error-free data transmission up to 250kbps.
The driver slew rates of the HWD481, HWD485, HWD490,
HWD491, and HWD1487 are not limited, allowing them to
transmit up to 2.5Mbps.
These transceivers draw between 120μA and 500μA of
supply current when unloaded or fully loaded with disabled
drivers. Additionally, the HWD481, HWD483, and HWD487
have a low-current shutdown mode in which they consume
only 0.1μA. All parts operate from a single 5V supply.
Drivers are short-circuit current limited and are protected
against excessive power dissipation by thermal shutdown
circuitry that places the driver outputs into a high-imped-
ance state. The receiver input has a fail-safe feature that
guarantees a logic-high output if the input is open circuit.
The HWD487 and HWD1487 feature quarter-unit-load
receiver input impedance, allowing up to 128 HWD487/
HWD1487 transceivers on the bus. Full-duplex communi-
cations are obtained using the HWD488–HWD491, while
the HWD481, HWD483, HWD485, HWD487, and HWD1487
are designed for half-duplex applications.
________________________Applic ations
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
__Next Generation Device Features
For Fault-Tolerant Applications
HWD
3430: ±80V Fault-Protected, Fail-Safe, 1/4
Unit Load, +3.3V, RS-485 Transceiver
HWD
3440E–
HWD
3444E: ±15kV ESD-Protected,
±60V Fault-Protected, 10Mbps, Fail-Safe,
RS-485/J1708 Transceivers
For Space-Constrained Applications
HWD
3460–
HWD
3464: +5V, Fail-Safe, 20Mbps,
Profibus RS-485/RS-422 Transceivers
HWD
3362: +3.3V, High-Speed, RS-485/RS-422
Transceiver in a SOT23 Package
HWD
3280E–
HWD
3284E: ±15kV ESD-Protected,
52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,
True Fail-Safe Receivers
HWD
3293/
HWD
3294/
HWD
3295: 20Mbps, +3.3V,
SOT23, RS-855/RS-422 Transmitters
For Multiple Transceiver Applications
HWD
3030E–
HWD
3033E: ±15kV ESD-Protected,
+3.3V, Quad RS-422 Transmitters
For Fail-Safe Applications
HWD
3080–
HWD
3089: Fail-Safe, High-Speed
(10Mbps), Slew-Rate-Limited RS-485/RS-422
Transceivers
For Low-Voltage Applications
HWD
3483E/
HWD
3485E/
HWD
3486E/
HWD
3488E/
HWD
3490E/
HWD
3491E: +3.3V Powered, ±15kV
ESD-Protected, 12Mbps, Slew-Rate-Limited,
True RS-485/RS-422 Transceivers
Low-Power, S lew-Rate-Limited
RS -485/RS -422 Transc eivers
______________________________________________________________S elec tion Table
HWD
481
HWD
483
HWD
485
HWD
487
HWD
488
HWD
489
HWD
490
HWD
491
HWD
1487
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
QUIESCENT
CURRENT
(
μ
A)
NUMBER OF
TRANSMITTERS
ON BUS
PIN
COUNT
Half
Half
Half
Half
Full
Full
Full
Full
Half
2.5
0.25
2.5
0.25
0.25
0.25
2.5
2.5
2.5
No
Yes
No
Yes
Yes
Yes
No
No
No
Yes
Yes
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
300
120
300
120
120
120
300
300
230
32
32
32
128
32
32
32
32
128
8
8
8
8
8
14
8
14
8
Ordering Information appears at end of data sheet.
1
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| HWD490CUA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
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| HWD490ESA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
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| HWD491 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
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