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LTC1482IN8 Datasheet

  • LTC1482IN8

  • Low Power RS485 Transceiver with Carrier Detect and Receiver...

  • 16頁

  • LINER

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LTC1482
Low Power RS485 Transceiver
with Carrier Detect and
Receiver Fail-Safe
DESCRIPTIO
The LTC
廬
1482 is a low power RS485 compatible trans-
ceiver that offers an active low carrier detect output. The
open-drain carrier detect pin allows several transceivers
to share the same carrier detect line and can be used to
detect the insertion or removal of a driven RS485/RS422
cable.
Enhanced ESD protection allows the LTC1482 to with-
stand
鹵15kV
(human body model), IEC-1000-4-2 level 4
(鹵8kV) contact and level 3 (鹵8kV) air discharge ESD
without latchup or damage.
The LTC1482 receiver stays alive at all times except in
shutdown. The supply current is a maximum of 700碌A(chǔ)
and 900碌A(chǔ) when the driver is disabled and enabled
respectively. In shutdown, the quiescent current of the
LTC1482 drops to a maximum of 20碌A(chǔ).
When the driver is disabled or the LTC1482 is in shut-
down, the driver outputs are three-stated and remain in
a high impedance state over the RS485 common mode
range.
Excessive power dissipation caused by bus contention or
faults is prevented by a thermal shutdown circuit, which
forces the driver outputs into a high impedance state.
The LTC1482 is fully specified over the commercial and
industrial temperature ranges and is available in 8-lead
MSOP, PDIP and SO packages.
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
No Damage or Latchup to
鹵
15kV (Human Body
Model), IEC1000-4-2 Level 4 (
鹵
8kV) Contact and
Level 3 (
鹵
8kV) Air Discharge
Active Low Carrier Detect Output
Guaranteed High Receiver Output State for
Floating, Shorted or Terminated Inputs with
No Signal Present
Drives Low Cost Residential Telephone Wires
Low Power: I
CC
= 700碌A(chǔ) Max with Driver Disabled
I
CC
= 900碌A(chǔ) Max in Driver Mode Without Load
20碌A(chǔ) Max Quiescent Current in Shutdown Mode
Single 5V Supply
鈥?7V to 12V Common Mode Range Permits
鹵7V
Ground Difference Between Devices on the Data Line
Maximum Data Rate of 4Mbps
Power Up/Down Glitch-Free Driver Outputs
Up to 32 Transceivers on the Bus
Available in 8-Lead
MSOP,
PDIP and SO Packages
APPLICATIO S
s
s
s
Battery-Powered RS485/RS422 Applications
Low Power RS485/RS422 Transceiver
Level Translator
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
LTC1482
RO1
CD1
DE1
D
DI1/SHDN1
GND1
R
B1
A1
V
CC1
Carrier Detect Output (2000 Foot STP Cable)
RS485 Interface
DE1
LTC1482
V
CC2
B2
120鈩?/div>
120鈩?/div>
GND2
1482 TA01
RO2
R
CD2
DE2
D
DI2/SHDN2
CD2
A2
B2
A2
DE1
鈫戔啌
DE2 = 0
1k PULL-UP AT CD
U
U
U
Dl1 = V
CC
Dl2 = V
CC
1482 TA01a
1

LTC1482IN8 產(chǎn)品屬性

  • LTC1482

  • 50

  • 集成電路 (IC)

  • 接口 - 驅(qū)動器，接收器，收發(fā)器

  • -

  • 收發(fā)器

  • 1/1

  • RS422，RS485

  • 4.75 V ~ 5.25 V

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 8-PDIP

  • 管件

LTC1482IN8相關(guān)型號PDF文件下載

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    Programmable Micropower Hex Translator/ Receiver/Driver
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    “Inductorless” 5V to + 5V Converter
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