max253cuat Maxim Integrated Products, Inc., max253cuat Datasheet - Page 10

• Manufacturer Part Number: max253cuat
• Description: Max253 Transformer Driver For Isolated Rs-485 Interface
• Manufacturer: Maxim Integrated Products, Inc.

Transformer Driver for
Isolated RS-485 Interface
Figure 6. 5V to Isolated 5V Application Circuit
Figure 7. 3.3V to Isolated 5V Application Circuit
10
______________________________________________________________________________________
V
3.3V
*SEE TABLE 2
IN
*SEE TABLE 2
V
5V
IN
FREQUENCY
C1
0.1µF
ON / OFF
SWITCH
FREQUENCY
C1
0.1µF
ON / OFF
SWITCH
4
3
SD
FS
GND1
4
3
2
SD
FS
MAX253
GND2
GND1
7
MAX253
2
V
CC
6
V
6
GND2
CC
D1
D2
7
1N5817
D1
D2
1
8
1
8
C4
0.1µF
1N5817
ICT:1.3CT*
ICT:2.1CT*
1N5817
1N5817
1N5817
1N5817
0.1µF
0.1µF
C3
C3
OPTIONAL 21kHz LOWPASS OUTPUT FILTER
OPTIONAL 21kHz LOWPASS OUTPUT FILTER
OUTPUT
OUTPUT
25µH
25µH
L2
L2
C2
22µF
C2
22µF
TP1
TP1
5V @ 200mA
ISO OUTPUT
5V @ 100mA
ISO OUTPUT
C7
2.2µF
C7
2.2µF
OUTPUT
OUTPUT
FILTER
FILTER