We are seeing the MAX3232C failures which is used for communication in our project. We saw 2 failures out of 10 boards. Remaining 8 boards will communicate properly. Can you help us to understand failure modes and possible cause of failure of this IC. Our Part of Design is attached for your reference.
Failed IC condition is as of below:
VCC = + 5V
Pin No. |
Pin Name |
Capacitor Value ( Ceramic Capacitor) |
Measured Voltage |
1 |
C1+ |
0.1µF (Pin1 to Pin3) |
+0.3V |
2 |
V+ |
0.1µF (Pin2 to GND) |
+0.03V |
3 |
C1- |
|
+0.05V |
4 |
C2+ |
0.1µF (Pin4 to Pin5) |
+0.05V |
5 |
C2- |
|
+0.04V |
6 |
V- |
0.1µF (Pin6 to GND) |
+0.3V |
7 |
Dout2 |
|
+0.3V |
8 |
RIN2 |
|
+0.3V |
9 |
Rout2 |
|
+0.73V |
10 |
DIN2 |
|
+5.02V |
11 |
DIN1 |
|
+5.02V |
12 |
ROUT1 |
|
+0.7V |
13 |
RIN1 |
|
+0.3V |
14 |
DOUT1 |
|
+0.3V |
15 |
GND |
|
0V |
16 |
VCC |
0.1µF (VCC to GND) |
+5.03V |
Note : IC not heating up and not taking abnormal current.