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LTC490 Fiches technique(PDF) 1 Page - Linear Technology

No de pièce LTC490
Description  Differential Driver and Receiver Pair
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
Logo LINER - Linear Technology

LTC490 Fiches technique(HTML) 1 Page - Linear Technology

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LTC490
Differential Driver and
Receiver Pair
DESCRIPTIO
S
FEATURE
s
Low Power: ICC = 300µA Typical
s
Designed for RS485 or RS422 Applications
s
Single 5V Supply
s
– 7V to 12V Bus Common-Mode Range
Permits
±7V Ground Difference Between Devices
on the Bus
s
Thermal Shutdown Protection
s
Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion or Removal of Package
s
Driver Maintains High Impedance with the
Power Off
s
Combined Impedance of a Driver Output and
Receiver Allows up to 32 Transceivers on the Bus
s
70mV Typical Input Hysteresis
s
28ns Typical Driver Propagation Delays with
5ns Skew
s
Pin Compatible with the SN75179
The LTC490 is a low power differential bus/line transceiver
designed for multipoint data transmission standard RS485
applications with extended common-mode range (12V to
–7V). It also meets the requirements of RS422.
The CMOS design offers significant power savings over its
bipolar counterpart without sacrificing ruggedness against
overload or ESD damage.
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
receiver has a fail safe feature which guarantees a high
output state when the inputs are left open.
Both AC and DC specifications are guaranteed from 0
°C to
70
°C and 4.75V to 5.25V supply voltage range.
S
APPLICATI
s
Low Power RS485/RS422 Transceiver
s
Level Translator
APPLICATI
TYPICAL
LTC490 • TA01
120
120
120
120
4000 FT BELDEN 9841
4000 FT BELDEN 9841
RECEIVER
LTC490
DRIVER
RECEIVER
LTC490
DRIVER
R
D
R
D
3
2
7
8
6
5


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