MAX253ESA Maxim Integrated Products, MAX253ESA Datasheet - Page 4

• Manufacturer Part Number: MAX253ESA
• Description: IC XFRMR DRIVER RS485 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Driverr

Specifications of MAX253ESA

• 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)
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Transformer Driver for
Isolated RS-485 Interface
(Circuit of Figure 6, V
4
____________________________Typical Operating Characteristics (continued)
100
_______________________________________________________________________________________
90
80
70
60
50
40
30
20
10
0
0
CIRCUIT OF FIGURE 1
20
EFFICIENCY vs. LOAD CURRENT
40
60
LOAD CURRENT (mA)
V
IN
(FS = HIGH)
80
= 4.5V
IN
SWITCHING WAVEFORMS
100
= 5V ±10%, T
120
(TWO CYCLES)
140
V
160
IN
= 5.5V
180
A
= +25°C, unless otherwise noted.)
200
CIRCUIT OF FIGURE 6
10
TIME FROM SHUTDOWN TO POWER-UP
9
8
7
6
5
4
3
2
1
0
0
OUTPUT VOLTAGE vs. LOAD CURRENT
CIRCUIT OF FIGURE 7
V
TURNS RATIO = 1:2.1
CIRCUIT OF FIGURE 6
V
TURNS RATIO = 1:1
20
IN
IN
D2
D1
= 3.3V
= 5.0V
40
60
LOAD CURRENT (mA)
80
(FS = LOW)
100
120
CIRCUIT OF FIGURE 6
V
TURNS RATIO = 1:1.3
IN
MEASURED AT TP1
= 5.0V
140
160 180 200
CIRCUIT OF FIGURE 1
220
SD
TP1 (OUTPUT VOLTAGE)
SWITCHING WAVEFORMS
(BREAK BEFORE MAKE)
10
9
8
7
6
5
4
3
2
1
0
0
OUTPUT VOLTAGE vs. LOAD CURRENT
CIRCUIT OF FIGURE 7
V
TURNS RATIO = 1:2.1
CIRCUIT OF FIGURE 6
V
TURNS RATIO = 1:1
20
IN
IN
= 3.3V
= 5.0V
40
60
LOAD CURRENT (mA)
80
(FS = HIGH)
100
120
CIRCUIT OF FIGURE 6
V
TURNS RATIO = 1:1.3
IN
MEASURED AT TP1
= 5.0V
140
160 180 200
D2
D1
220