MAX253CSA+ Maxim Integrated Products, MAX253CSA+ Datasheet - Page 7
![IC XFRMR DRIVER RS485 8-SOIC](/photos/1/39/13902/8-soic_21-0042b_sml.jpg)
MAX253CSA+
Manufacturer Part Number
MAX253CSA+
Description
IC XFRMR DRIVER RS485 8-SOIC
Manufacturer
Maxim Integrated Products
Type
Driverr
Datasheet
1.MAX253CSA.pdf
(18 pages)
Specifications of MAX253CSA+
Number Of Drivers/receivers
1/0
Protocol
RS232, RS485
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Supply Voltage (max)
6 V
Supply Voltage (min)
2.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Interface
RS-485
Maximum Power Dissipation
471 mW
Minimum Operating Temperature
0 C
Supply Current
0.45 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Figure 3. Typical RS-485 Application Circuit, 5V Configuration
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
3.3kΩ
7
390Ω
390Ω
CC
6
D1
D2
FS
3
1
8
1
1
6
5
1CT:1.3CT**
4
ISOLATION
BARRIER
PC410 / 417
PC410 / 417
2
3
PC357T
1N5817
1N5817
Isolated RS-485 Interface
3
4
3
6
5
4
1
0.1μF
Transformer Driver for
C3
390Ω
3.3kΩ
C2
22μF
8
3.3kΩ
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
7