MAX253E Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX253E

Transformer Driver for Isolated RS-485 Interface

Maxim Integrated 

MAX253

Transformer Driver for

Isolated RS-485 Interface

VIN

5V

C1

0.1μF

6

4

SD

ON / OFF

VCC

1

D1

MAX253

3

FREQUENCY

SWITCH

FS

GND1

2

8

D2

GND2

7

*SEE TABLE 2

1CT:1.3CT* 1N5817

C3

0.1μF

5V @ 200mA

TP1 ISO OUTPUT

C2

22μF

1N5817

OPTIONAL 21kHz LOWPASS OUTPUT FILTER

L2

25μH

FILTER

OUTPUT

OUTPUT

C7

2.2μF

Figure 6. 5V to Isolated 5V Application Circuit

VIN

3.3V

C1

0.1μF

4

SD

ON / OFF

MAX253

1

D1

1CT:2.1CT* 1N5817

C3

0.1μF

5V @ 100mA

TP1 ISO OUTPUT

C2

22μF

3

FREQUENCY

SWITCH

FS

GND1 GND2

2

7

8

D2

VCC

6

1N5817

1N5817

1N5817

*SEE TABLE 2

C4

0.1μF

OPTIONAL 21kHz LOWPASS OUTPUT FILTER

L2

25μH

FILTER

OUTPUT

OUTPUT

C7

2.2μF

Figure 7. 3.3V to Isolated 5V Application Circuit

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