MAX253CUA+ Maxim Integrated Products, MAX253CUA+ Datasheet - Page 9

• Manufacturer Part Number: MAX253CUA+
• Description: IC XFRMR DRIVER RS485 8-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Driverr

Specifications of MAX253CUA+

• Number Of Drivers/receivers: 1/0
• Protocol: RS232, RS485
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• 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: 330 mW
• Minimum Operating Temperature: 0 C
• Supply Current: 0.45 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 5. Typical RS-232 Application Circuit
V
5V
T1
T2
T4
T5
R1
R2
R3
R4
R5
T3
*74HC04 OR EQUIVALENT
**
IN
IN
IN
IN
IN
4N25 LOWER SPEED, LOWER COST ALTERNATE OPTOCOUPLER CONFIGURATIONS (FOR DATA RATES BELOW 9.6kbps)
OUT
OUT
OUT
OUT
OUT
IN
*74HC04
_______________________________________________________________________________________
5 X 3.3kΩ
74HC04
74HC04
74HC04
74HC04
74HC04
74HC04
74HC04
74HC04
74HC04
SEE TABLE 2
ON / OFF
*74HC04
T
IN
C1
0.1µF
390Ω
5
4
N.C.
SD
390Ω
390Ω
390Ω
390Ω
390Ω
GND1 GND2
2
MAX253
1
2
4N25
V
CC
6
7
6
FS
D1
D2
1N5711
3
1
8
4
5
6
5
4
ISO
GND
1CT:1.3CT**
1
2
3.3kΩ
10 x PC417
ISOLATION
BARRIER
Isolated RS-485 Interface
1N5817
1N5817
ISO
T
V
IN
1
2
CC
6
5
4
R
0.1µF
OUT
Transformer Driver for
C3
74HCO4
3.3kΩ
5 x 3.3kΩ
390Ω
390Ω
390Ω
390Ω
390Ω
1N5711
C2
22µF
5
4
8
IN
SET
6
15
16
22
23
17
14
MAX667
6
8
7
9
6
4N25
GND
T1
T2
T3
T4
T5
R1
R2
R3
R4
R5
21
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
1
2
4
V
SD
CC
MAX205
SHDN
OUT
ISO
GND
5
390Ω
GND
T1
T2
T3
T4
T5
EN
2
R1
R2
R3
R4
R5
OUT
OUT
OUT
OUT
OUT
20
IN
IN
IN
IN
IN
C4
22µF
ISO 5V
3
4
2
1
19
10
5
24
18
13
V
ISO
R
CC
OUT
9