max253cuat Maxim Integrated Products, Inc., max253cuat Datasheet - Page 7

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

Figure 4. Typical RS-485 Application Circuit, 3.3V Configuration
V
3.3V
IN
ON / OFF
RO
DE
DI
C1
0.1µF
*
*
*
*
**
74HC04
74HC04
74HC04
74HC04 OR EQUIVALENT
SEE TABLE 2
5
4
6
_______________________________________________________________________________________
V
N.C.
SD
CC
GND1
2
MAX253
3.3k
390
390
GND2
7
D1
D2
FS
0.1µF
1N5817
3
1
8
C5
1
1
6
5
4
ICT:2.1CT**
1N5817
ISOLATION
PC410 / 417
3
PC410 / 417
BARRIER
2
PC357T
1N5817
1N5817
3
Isolated RS-485 Interface
4
3
6
5
4
1
0.1µF
Transformer Driver for
C3
390
3.3k
C2
22µF
8
3.3k
IN
SET
4
3
1
6
MAX667
DI
DE
RO
GND
RE
4
MAX481
MAX483
MAX485
MAX487
2
SHDN
8
V
CC
OUT
5
GND
5
2
A
B
C4
22µF
6
7
485
I/O
ISO 5V
7