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Part Name
Description
LTM2881Y-3(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTM2881Y-3
(Rev.:RevA)
Complete Isolated RS485/RS422 µModule Transceiver + Power
Linear Technology
LTM2881Y-3 Datasheet PDF : 22 Pages
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Block Diagram
V
CC
2.2µF
V
L
2.2µF
ISOLATED
DC/DC
CONVERTER
RO
RE
DE
DI
ON
TE
D
OUT
ISOLATED
COMM
INTERFACE
GND
= LOGIC SIDE COMMON
LTM2881
V
CC2
5V
REG
2.2µF
RX
ISOLATED
COMM
INTERFACE
DX
A
B
120Ω
Y
Z
SLO
D
IN
GND2
= ISOLATED SIDE COMMON
2881 BD
TEST CIRCUITs
Y
GND
DI
+
OR
V
L
DRIVER
V
–
OD
Z
R
R
+
V
–
OC
2881 F01
Figure 1. Driver DC Characteristics
Y
GND
DI
OR
DRIVER
V
L
Z
I
OSD
+
–
–7V TO 12V
2881 F02
Figure 2. Driver Output Short-Circuit Current
I
IN
A OR B
V
IN
+–
RECEIVER
B OR A
R
IN
=
V
IN
I
IN
2881 F03
Figure 3. Receiver Input Current and Input Resistance
2881fa
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