Datasheet

MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor 109
Appendix A
Electrical Characteristics
A.1 Introduction
This chapter contains electrical and timing specifications.
A.2 Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only, and functional operation at the maxima is not
guaranteed. Stress beyond the limits specified in Table A-1 may affect device reliability or cause
permanent damage to the device. For functional operating conditions, refer to the remaining tables in this
chapter.
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 V
SS
or V
DD
) or the programmable
pull-up resistor associated with the pin is enabled.
Table A-1. Absolute Maximum Ratings
Rating Symbol Value Unit
Supply voltage V
DD
–0.3 to +5.8 V
Maximum current into V
DD
I
DD
120 mA
Digital input voltage V
In
–0.3 to V
DD
+0.3 V
Instantaneous maximum current
Single pin limit (applies to all port pins)
1, 2, 3
1
Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate
resistance values for positive (V
DD
) and negative (V
SS
) clamp voltages, then use the larger of the two resistance values.
2
All functional non-supply pins are internally clamped to V
SS
and V
DD
except the RESET/V
PP
pin which is internally clamped
to V
SS
only.
3
Power supply must maintain regulation within operating V
DD
range during instantaneous and operating maximum current
conditions. If positive injection current (V
In
> V
DD
) is greater than I
DD
, the injection current may flow out of V
DD
and could result
in external power supply going out of regulation. Ensure external V
DD
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.
I
D
± 25 mA
Storage temperature range T
stg
–55 to 150 °C