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MAX253 Datasheet(PDF) 13 Page - Maxim Integrated Products

Part # MAX253
Description  Transformer Driver for Isolated RS-485 Interface
PDF  16 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX253 Datasheet(HTML) 13 Page - Maxim Integrated Products

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Transformer Driver for
Isolated RS-485 Interface
______________________________________________________________________________________
13
10µF
6N136
MAX253
D1
D2
GND1
GND2
VCC
4
27
8
1
SD
6
6N136
6N136
10µF
79 L12
78L05
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
CONVST
VDD
VSS
CLOCK
DATA
AIN
VREF
GND
MAX176
3k
3k
470
Ω
0.1µF 10µF
0.1µF
10µF
0.1µF
10µF
+5V
200
Ω
200
Ω
8.2k
74HC04
7
6
5
4
3
2
1
15
16
QH
QG
QF
QE
QD
QC
QB
QA
SER
SCK
RCK
SCLR
14
11
12
10
74HC595
13
8
+5V
0.1µF
D11(MSB)
D10
D9
D8
+5V
7
6
5
4
3
2
1
15
16
QH
QG
QF
QE
QD
QC
QB
QA
SER
SCK
RCK
SCLR
14
11
12
10
74HC595
13
8
+5V
0.1µF
D7
D6
D5
D4
D3
D2
D1
D0(LSB)
+5V
74HC04
ON/OFF
START
INPUT CLOCK
1CT : 1.5CT : 3CT*
4 x 1N5817
VIN
5V
SIGNAL
GROUND
ANALOG
INPUT
ISO
5V
ISO
-12V
8
QH
′
ISOLATION
BARRIER
*SEE TABLE 2
Figure 10. Typical Isolated ADC Application



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