HCS08 datasheet(284/316 Pages) NXP

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Appendix A Electrical Characteristics

MC9S08SG8 MCU Series Data Sheet, Rev. 8

284

Freescale Semiconductor

This device contains circuitry protecting against damage due to high static voltage or electrical fields;

however, it is advised that normal precautions be taken to avoid application of any voltages higher than

maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused

inputs are tied to an appropriate logic voltage level (for instance, either VSS or VDD) or the programmable

pull-up resistor associated with the pin is enabled.

Table A-2. Absolute Maximum Ratings

Rating

Symbol

Value

Unit

Temp Rated1

1 Electrical characteristics only apply to the temperature rated devices marked with x.

Standard

AEC

Grade 0

Supply voltage

VDD

–0.3 to +5.8

Maximum current into VDD

IDD

120

Digital input voltage

VIn

–0.3 to VDD + 0.3

Instantaneous maximum current



Single pin limit (applies to all port pins)2, 3, 4

Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate

resistance values for positive (VDD) and negative (VSS) clamp voltages, then use the larger of the two resistance values.

3 All functional non-supply pins are internally clamped to V

SS and VDD.

4 Power supply must maintain regulation within operating V

DD range during instantaneous and operating maximum current

conditions. If positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and could result

in external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum injection

current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or

if the clock rate is very low (which would reduce overall power consumption).

 25

Storage temperature range

Tstg

–55 to 150

Cx

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