ST72334J4B7(2003) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST72334J4B7
(Rev.:2003)
(Rev.:2003)
STMicroelectronics
ST72334J4B7 Datasheet PDF : 153 Pages
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ST72334J/N, ST72314J/N, ST72124J
16.2 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-
16.2.1 Voltage Characteristics
tions is not implied. Exposure to maximum rating
conditions for extended periods may affect device
reliability.
Symbol
Ratings
VDD - VSS
VDDA - VSSA
VIN 1) & 2)
|∆VDDx| and |∆VSSx|
VDDX- VDDA
|VSSA - VSSx|
VESD(HBM)
VESD(MM)
Supply voltage
Analog Reference 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 power pins
Electro-static discharge voltage (Human Body Model)
Electro-static discharge voltage (Machine Model)
16.2.2 Current Characteristics
Maximum value
6.5
6.5
VSS-0.3 to 6.5
VSS-0.3 to VDD+0.3
50
50
Unit
V
mV
see Section 16.7.2 "Absolute Electri-
cal Sensitivity" on page 124
Symbol
IVDD
IVSS
IIO
IINJ(PIN) 2) & 4)
ΣIINJ(PIN) 2)
Ratings
Total current into VDD power lines (source) 3)
Total current out of VSS ground lines (sink) 3)
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 ISPSEL pin
Injected current on RESET pin
Injected current on OSC1 and OSC2 pins
Injected current on any other pin 5) & 6)
Total injected current (sum of all I/O and control pins) 5)
Maximum value
150
150
25
50
- 25
±5
±5
±5
±5
± 20
Unit
mA
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: 4.7kΩ for
RESET, 10kΩ for I/Os). Unused I/O pins must be tied in the same way to VDD 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 ΣIINJ(PIN) is the absolute sum of the positive
and negative injected currents (instantaneous values). These results are based on characterisation with ΣIINJ(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.
108/153
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