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LTC2870 Datasheet(PDF) 13 Page - Linear Technology

Part # LTC2870
Description  RS232/RS485 Multiprotocol Transceivers with Integrated Termination
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2870 Datasheet(HTML) 13 Page - Linear Technology

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LTC2870/LTC2871
13
28701f
TEST CIRCUITS
Figure 1. RS485 Driver DC Characteristics
Figure 2. RS485 Driver Output Current
Figure 3. RS485 Receiver Input Current and Resistance (Note 5)
Figure 4. RS485 Driver Timing Measurement
28701 F01
DRIVER
DY/DI
GND
OR
VL
Y
RL
RL
Z
VOD
+
–
VOC
+
–
28701 F02
DRIVER
Y OR Z
DY/DI
GND
OR
VL
Z OR Y
VOUT
IOZD485, IOSD485
+
–
28701 F03
RECEIVER
A OR B
B OR A
VIN
IIN485
RIN485 =
VIN
IIN485
+
–
28701 F04
DRIVER
DY/DI
Y
Z
RDIFF
CL
CL
tPLHD485
tSKEWD485
tPLHD485
tRD485
tFD485
90%
0V
VOD
½VOD
VL
0V
DY/DI
Y, Z
Y - Z
10%
90%
0V
10%



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