ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 163

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

12.2 ABSOLUTE MAXIMUM RATINGS
Stresses above those listed as “absolute maxi-
mum ratings” may cause permanent damage to
the device. This is a stress rating only and func-
tional operation of the device under these condi-
12.2.1 Voltage Characteristics
12.2.2 Current Characteristics
Notes:
1. Directly connecting the RESET and I/O pins to V
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
RESET, 10k
2. When the current limitation is not possible, the V
I
3. All power (V
4. Negative injection disturbs the analog performance of the device. See note in
For best reliability, it is recommended to avoid negative injection of more than 1.6mA.
5. When several inputs are submitted to a current injection, the maximum I
and negative injected currents (instantaneous values). These results are based on characterisation with I
mum current injection on four I/O port pins of the device.
6. True open drain I/O port pins do not accept positive injection.
INJ(PIN)
| V
I
DDx
|V
INJ(PIN)
V
V
V
V
V
SSA
I
specification. A positive injection is induced by V
Symbol
Symbol
ESD(HBM)
DD
INJ(PIN)
PP
ESD(MM)
IN
| and | V
I
I
VDD
VSS
I
1) & 2)
IO
- V
- V
- V
2) & 4)
DD
for I/Os). For the same reason, unused I/O pins must not be directly tied to V
SS
SS
SSx
2)
) and ground (V
|
SSx
|
Supply voltage
Programming Voltage
Input Voltage on true open drain pin
Input voltage on any other pin
Variations between different digital power pins
Variations between digital and analog ground pins
Electro-static discharge voltage (Human Body Model)
Electro-static discharge voltage (Machine Model)
Total current into V
Total current out of V
Output current sunk by any standard I/O and control pin
Output current sunk by any high sink I/O pin
Output current source by any I/Os and control pin
Injected current on V
Injected current on RESET pin
Injected current on OSC1 and OSC2 pins
Injected current on any other pin
Total injected current (sum of all I/O and control pins)
SS
) lines must always be connected to the external supply.
Ratings
DD
PP
SS
power lines (source)
Ratings
pin
ground lines (sink)
DD
IN
or V
absolute maximum rating must be respected, otherwise refer to
IN
>V
5) & 6)
SS
DD
could damage the device if an unintentional internal reset
tions is not implied. Exposure to maximum rating
conditions for extended periods may affect device
reliability.
while a negative injection is induced by V
3)
3)
INJ(PIN)
5)
“ADC Accuracy” on page
see
is the absolute sum of the positive
V
Maximum value
Maximum value
SS
Section 12.7.3 on page 179
V
-0.3 to V
SS
-0.3 to 6.5
DD
± 25
- 25
150
150
± 5
± 2
± 5
± 5
25
50
6.5
13
50
50
or V
DD
SS
+0.3
.
IN
194.
INJ(PIN)
<V
ST72521
SS
Unit
mA
mA
Unit
163/211
mV
V
.
maxi-
for