MAX253MJA(2010) 查看數據表（PDF） - Maxim Integrated

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MAX253MJA
(Rev.:2010)

Transformer Driver for Isolated RS-485 Interface

Maxim Integrated 

Transformer Driver for

Isolated RS-485 Interface

__________________Pin Configuration

TOP VIEW

+

D1 1

GND1 2

FS 3

MAX253

SD 4

8 D2

7 GND2

6 VCC

5 N.C.

DIP/SO/μMAX

_____________________Pin Description

PIN NAME

1

D1

2 GND1

3

FS

4

SD

5

N.C.

6

VCC

7 GND2

8

D2

FUNCTION

Open drain of N-channel transformer drive 1.

Ground. Connect both GND1 and GND2

to ground.

Frequency switch. If FS = VCC or open,

switch frequency = 350kHz; if VFS = 0V,

switch frequency = 200kHz.

Shutdown. Ground for normal operation,

connect high for shutdown.

Not internally connected.

5V supply voltage.

Ground. Connect both GND1 and GND2

to ground.

Open drain of N-channel transformer drive 2.

_______________________________________________________________________________________ 5

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