參數資料
型號: LTC1482IS8#PBF
廠商: Linear Technology
文件頁數: 1/16頁
文件大?。?/td> 0K
描述: IC TXRX RS485 LOWPWR 8-SOIC
標準包裝: 100
類型: 收發(fā)器
驅動器/接收器數: 1/1
規(guī)程: RS422,RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SOIC
包裝: 管件
1
LTC1482
Low Power RS485 Transceiver
with Carrier Detect and
Receiver Fail-Safe
s
No Damage or Latchup to
±15kV (Human Body
Model), IEC1000-4-2 Level 4 (
±8kV) Contact and
Level 3 (
±8kV) Air Discharge
s
Active Low Carrier Detect Output
s
Guaranteed High Receiver Output State for
Floating, Shorted or Terminated Inputs with
No Signal Present
s
Drives Low Cost Residential Telephone Wires
s
Low Power: ICC = 700A Max with Driver Disabled
s
ICC = 900A Max in Driver Mode Without Load
s
20
A Max Quiescent Current in Shutdown Mode
s
Single 5V Supply
s
– 7V to 12V Common Mode Range Permits
±7V
Ground Difference Between Devices on the Data Line
s
Maximum Data Rate of 4Mbps
s
Power Up/Down Glitch-Free Driver Outputs
s
Up to 32 Transceivers on the Bus
s
Available in 8-Lead MSOP, PDIP and SO Packages
The LTC
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
±15kV (human body model), IEC-1000-4-2 level 4
(
±8kV) contact and level 3 (±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
A
and 900
A when the driver is disabled and enabled
respectively. In shutdown, the quiescent current of the
LTC1482 drops to a maximum of 20
A.
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.
s
Battery-Powered RS485/RS422 Applications
s
Low Power RS485/RS422 Transceiver
s
Level Translator
, LTC and LT are registered trademarks of Linear Technology Corporation.
RO1
CD1
DE1
DI1/SHDN1
R
VCC1
LTC1482
GND1
B1
A1
B2
A2
120
120
D
VCC2
GND2
1482 TA01
R
D
RO2
CD2
DE2
DI2/SHDN2
LTC1482
RS485 Interface
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
Carrier Detect Output (2000 Foot STP Cable)
DE1
↑↓
Dl1 = VCC
1482 TA01a
DE2 = 0
Dl2 = VCC
1k PULL-UP AT CD
DE1
A2
B2
CD2
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