MAX253EPA+ Maxim Integrated Products, MAX253EPA+ Datasheet - Page 11

• Manufacturer Part Number: MAX253EPA+
• Description: IC XFRMR DRIVER RS485 8-DIP
• Manufacturer: Maxim Integrated Products
• Type: Driverr

Specifications of MAX253EPA+

• Number Of Drivers/receivers: 1/0
• Protocol: RS232, RS485
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Supply Voltage (max): 6 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Interface: RS-485
• Maximum Power Dissipation: 727 mW
• Minimum Operating Temperature: - 40 C
• Supply Current: 0.45 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 6. 5V to Isolated 5V Application Circuit
Figure 7. 3.3V to Isolated 5V Application Circuit
V
3.3V
*SEE TABLE 2
IN
*SEE TABLE 2
V
5V
IN
______________________________________________________________________________________
FREQUENCY
C1
0.1µF
FREQUENCY
ON / OFF
SWITCH
C1
0.1µF
ON / OFF
SWITCH
4
3
4
3
SD
FS
GND1
2
SD
FS
MAX253
GND1
GND2
MAX253
7
2
V
CC
6
GND2
V
6
CC
D1
D2
7
D1
D2
1N5817
1
8
1
8
Isolated RS-485 Interface
C4
0.1µF
1CT:1.3CT*
1N5817
1CT:2.1CT*
Transformer Driver for
1N5817
1N5817
1N5817
1N5817
0.1µF
0.1µF
C3
OPTIONAL 21kHz LOWPASS OUTPUT FILTER
C3
OUTPUT
OPTIONAL 21kHz LOWPASS OUTPUT FILTER
OUTPUT
25µH
L2
25µH
L2
C2
22µF
TP1
C2
22µF
TP1
5V @ 200mA
ISO OUTPUT
C7
2.2µF
OUTPUT
FILTER
5V @ 100mA
ISO OUTPUT
C7
2.2µF
OUTPUT
FILTER
11