MAX253 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX253 Datasheet PDF : 18 Pages
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MAX253
Transformer Driver for
Isolated RS-485 Interface
ISOLATION
VIN
5V
BARRIER
1CT : 1.5CT : 3CT*
78L05
1 D1
ISO
5V
10μF
4 x 1N5817
MAX253
6
VCC
79 L12
8
D2
4 ON/OFF
SD
ISO
-12V
10μF
GND1 GND2
2
7
10μF
0.1μF
ANALOG
INPUT
0.1μF
10μF
MAX176
1
VDD
8
VSS
2
7
AIN CONVST
3
VREF
4
GND
6
CLOCK
5
DATA
0.1μF 10μF
3kΩ
3kΩ
470Ω
SIGNAL
GROUND
5V
6N136
8
1
7
2 200Ω
6
3
5
4
6N136
8
1
7
2 200Ω
6
3
5
4
6N136
1
8
74HC04
2
7 8.2kΩ
3
6
4
5
74HC04
START
INPUT CLOCK
14
11
12
5V 10
QH 7
6
SER
QG
74HC595 QF 5
SCK
QE 4
3
QD
RCK
QC 2
QB 1
SCLR
15
QA
16
13
8
D11(MSB)
D10
D9
D8
5V
0.1μF
14
11
12
5V 10
8
QH′ QH 7
SER
QG 6
74HC595 QF 5
SCK
QE 4
QD 3
RCK
QC 2
QB 1
SCLR
QA 15
16
13
8
D7
D6
D5
D4
D3
D2
D1
D0(LSB)
5V
0.1μF
*SEE TABLE 2
Figure 10. Typical Isolated ADC Application
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