MAX253 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX253 Datasheet PDF : 18 Pages
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MAX253
Transformer Driver for
Isolated RS-485 Interface
VIN
5V
C1
0.1μF
6
VCC
1
D1
ON / OFF
4
SD
MAX253
GND1 GND2
2
7
8
D2
3
FS
ISOLATION
BARRIER
1CT:1.3CT** 1N5817
C3
0.1μF
1N5817
8
IN
C2
22μF
2
OUT
MAX667
ISO 5V
C4
22μF
SET GND SHDN
6
4
5
*74HC04
DI
390Ω
*74HC04
DE
390Ω
*74HC04
RO
3.3kΩ
*74HC04 OR EQUIVALENT
** SEE TABLE 2
PC410 / 417
6
1
5
3
4
PC357T
1
4
2
3
PC410 / 417
6
5
1
4
3
3.3kΩ
390Ω
3.3kΩ
8
4 DI
VCC
6
A
MAX481
3 DE
MAX483
MAX485
485
I/O
MAX487
1 RO
RE
7
B
GND
2
5
Figure 3. Typical RS-485 Application Circuit, 5V Configuration
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