
Electrical characteristics ST72321xx-Auto
186/243 Doc ID 13829 Rev 1
19.2 Absolute maximum ratings
Stresses above those listed as “absolute maximum ratings” may cause permanent damage
to the device. This is a stress rating only and functional operation of the device under these
conditions is not implied. Exposure to maximum rating conditions for extended periods may
affect device reliability.
19.2.1 Voltage characteristics
Table 104. Voltage characteristics
Symbol Ratings Maximum value Unit
V
DD
- V
SS
Supply voltage 6.5
V
V
PP
- V
SS
Programming voltage 13
V
IN
(1)
Input voltage on true open-drain pin V
SS
- 0.3 to 6.5
Input voltage on any other pin V
SS
- 0.3 to V
DD
+0.3
|V
DDx
| and |V
SSx
| Variations between different digital power pins 50
mV
|V
SSA
- V
SSx
| Variations between digital and analog ground pins 50
V
ESD(HBM)
Electrostatic discharge voltage (Human Body Model)
See Section 19.7.3 on page 202.
V
ESD(MM)
Electrostatic discharge voltage (Machine Model)
1. Directly connecting the RESET and I/O pins to V
DD
or V
SS
could damage the device if an unintentional internal reset is
generated or an unexpected change of the I/O configuration occurs (for example, due to a corrupted program counter). To
guarantee safe operation, this connection has to be done through a pull-up or pull-down resistor (typical: 4.7k for RESET,
10k for I/Os). For the same reason, unused I/O pins must not be directly tied to V
DD
or V
SS
.
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