Datasheet

MAX253
Transformer Driver for
Isolated RS-485 Interface
Maxim Integrated | 5www.maximintegrated.com
1
2
3
4
8
7
6
5
D2
GND2
V
CC
N.C.
SD
FS
GND1
D1
DIP/SO/
μ
MAX
TOP VIEW
MAX253
+
Pin Configuration
Pin Description
Not internally connected.N.C.5
5V supply voltage.V
CC
6
GND27
Open drain of N-channel transformer drive 2.D28
SD4
FS3
PIN
GND12
Open drain of N-channel transformer drive 1.D11
FUNCTIONNAME
Ground. Connect both GND1 and GND2
to ground.
Frequency switch. If FS = V
CC
or open,
switch frequency = 350kHz; if V
FS
= 0V,
switch frequency = 200kHz.
Shutdown. Ground for normal operation,
connect high for shutdown.
Ground. Connect both GND1 and GND2
to ground.