MAX253CPA+ Maxim Integrated Products, MAX253CPA+ Datasheet - Page 14

• Manufacturer Part Number: MAX253CPA+
• Description: IC XFRMR DRIVER RS485 8-DIP
• Manufacturer: Maxim Integrated Products
• Type: Driverr

Specifications of MAX253CPA+

• 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: + 70 C
• Mounting Style: Through Hole
• Interface: RS-485
• Maximum Power Dissipation: 727 mW
• Minimum Operating Temperature: 0 C
• Supply Current: 0.45 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Transformer Driver for
Isolated RS-485 Interface
Figure 10. Typical Isolated ADC Application
14
10μF
GROUND
SIGNAL
10μF
0.1μF
ANALOG
*SEE TABLE 2
______________________________________________________________________________________
INPUT
0.1μF
ISO
5V
1
2
3
4
V
AIN
VREF
GND
DD
MAX176
78L05
CONVST
CLOCK
DATA
V
SS
0.1μF 10μF
8
7
6
5
-12V
ISO
10μF
79 L12
3kΩ
3kΩ
470Ω
10μF
4 x 1N5817
8
7
6
5
8
7
6
5
1
2
3
4
1CT : 1.5CT : 3CT*
ISOLATION
BARRIER
6N136
6N136
6N136
8
7
6
5
1
2
3
4
1
2
3
4
V
5V
IN
200Ω
200Ω
8.2kΩ
5V
1
6
8
74HC04
D1
V
D2
CC
GND1
2
MAX253
GND2
5V
5V
7
14
11
12
10
14
11
12
10
SD
13
13
SER
SCK
RCK
SCLR
SER
SCK
RCK
SCLR
74HC595
74HC595
4
QH′
8
ON/OFF
74HC04
8
8
QH
QG
QD
QC
QH
QG
QD
QC
QB
QA
QB
QA
QF
QE
QF
QE
15
16
15
16
7
6
5
4
3
2
1
7
6
5
4
3
2
1
INPUT CLOCK
0.1μF
0.1μF
D11(MSB)
D10
D9
D8
5V
D7
D6
D5
D4
D3
D2
D1
D0(LSB)
5V
START