MAX253ESA+ Maxim, MAX253ESA+ Datasheet - Page 6

• Manufacturer Part Number: MAX253ESA+
• Description: Transformer Dvr for Iso. RS-485/RS-232 I'face; Single Supply 5.0 or 3.3 V, SOIC8
• Manufacturer: Maxim

Specifications of MAX253ESA+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

Transformer Driver for
Isolated RS-485 Interface
Figure 3. Typical RS-485 Application Circuit, 5V Configuration
6
_______________________________________________________________________________________
V
5V
IN
ON / OFF
RO
DE
DI
*
**
C1
0.1µF
*
*
*
74HC04 OR EQUIVALENT
74HC04
74HC04
74HC04
SEE TABLE 2
4
SD
GND1
2
MAX253
GND2
V
3.3k
7
390
390
CC
6
D1
D2
FS
3
1
8
1
1
6
5
ICT:1.3CT**
4
ISOLATION
BARRIER
PC410 / 417
PC410 / 417
2
3
PC357T
1N5817
1N5817
3
4
3
6
5
4
1
0.1µF
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
ISO 5V
485
I/O