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参数资料
型号： ST72C171K2B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装： SHRINK, PLASTIC, DIP-32
文件页数： 17/152页
文件大小： 2156K
代理商： ST72C171K2B6
ST72C171
113/152
9.2 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-
tions is not implied. Exposure to maximum rating
conditions for extended periods may affect device
reliability.
9.2.1 Voltage Characteristics
9.2.2 Current Characteristics
9.2.3 Thermal Characteristics
Notes:
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). Unused I/O pins must be tied in the same way to V
DD or VSS according to their reset configuration.
2. When the current limitation is not possible, the VIN absolute maximum rating must be respected, otherwise refer to
IINJ(PIN) specification. A positive injection is induced by VIN>VDD while a negative injection is induced by VIN<VSS.
3. All power (VDD) and ground (VSS) lines must always be connected to the external supply.
4. Negative injection disturbs the analog performance of the device. In particular, it induces leakage currents throughout
the device including the analog inputs. To avoid undesirable effects on the analog functions, care must be taken:
- Analog input pins must have a negative injection less than 0.8 mA (assuming that the impedance of the analog voltage
is lower than the specified limits)
- Pure digital pins must have a negative injection less than 1.6mA. In addition, it is recommended to inject the current as
far as possible from the analog input pins.
5. When several inputs are submitted to a current injection, the maximum
ΣI
INJ(PIN) is the absolute sum of the positive
and negative injected currents (instantaneous values). These results are based on characterisation with
ΣI
INJ(PIN) maxi-
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.
Symbol
Ratings
Maximum value
Unit
VDD - VSS
Supply voltage
6.5
V
VIN
Input voltage on any pin 1) & 2)
VSS-0.3 to VDD+0.3
VESD(HBM)
Electro-static discharge voltage (Human Body Model)
see Section 9.7.2 Absolute Electri-
cal Sensitivity
VESD(MM)
Electro-static discharge voltage (Machine Model)
Symbol
Ratings
Maximum value
Unit
IVDD
Total current into VDD power lines (source)
3)
80
mA
IVSS
Total current out of VSS ground lines (sink)
3)
80
IIO
Output current sunk by any standard I/O and control pin
25
Output current sunk by any high sink I/O pin
50
Output current source by any I/Os and control pin
- 25
IINJ(PIN)
2) & 4)
Injected current on ISPSEL pin
± 5
Injected current on RESET pin
± 5
Injected current on OSC1 and OSC2 pins
± 5
Injected current on any other pin 5) & 6)
± 5
ΣI
INJ(PIN)
2)
Total injected current (sum of all I/O and control pins) 5)
± 20
Symbol
Ratings
Value
Unit
TSTG
Storage temperature range
-65 to +150
°C
TJ
Maximum junction temperature
(see Section 10.2 THERMAL CHARACTERISTICS )
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