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Electrical characteristics
ST72324B-Auto
12.1.5
Pin input voltage
The input voltage measurement on a pin of the device is described in
Figure 61.
Figure 61.
Pin input voltage
12.2
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.
12.2.1
Voltage characteristics
VIN
ST7 pin
Table 83.
Voltage characteristics
Symbol
Ratings
Maximum value
Unit
VDD - VSS
Supply voltage
6.5
V
VPP - VSS
Programming voltage
13
VIN
(1)(2)
1.
Directly connecting the RESET and I/O pins to VDD or VSS 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 VDD or VSS.
2.
IINJ(PIN) must never be exceeded. This is implicitly ensured if VIN maximum is respected. If VIN maximum
cannot be respected, the injection current must be limited externally to the IINJ(PIN) value. A positive
injection is induced by VIN > VDD while a negative injection is induced by VIN < VSS. For true open-drain
pads, there is no positive injection current, and the corresponding VIN maximum must always be
respected.
Input voltage on true open drain pin
VSS - 0.3 to 6.5
Input voltage on any other pin
VSS - 0.3 to
VDD +0.3
|
V
DDx| and |VSSx| Variations between different digital power pins
50
mV
|VSSA - VSSx|
Variations between digital and analog ground pins
50
VESD(HBM)
Electrostatic discharge voltage (human body model)
VESD(MM)
Electrostatic discharge voltage (machine model)