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A.1.4 Current Injection
Power supply must maintain regulation within operating V
operating maximum current conditions. If positive injection current (V
injection current may flow out of VDD5 and could result in external power supply going out of regulation.
Ensure external VDD5 load will shunt current greater than maximum injection current. This will be the
greatest risk when the MCU is not consuming power; e.g. if no system clock is present, or if clock rate is
very low which would reduce overall power consumption.
A.1.5 Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only. A functional operation under or outside those maxima
is not guaranteed. Stress beyond those limits may affect the reliability or cause permanent damage of the
device.
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 (e.g., either V
Num
1
I/O, Regulator and Analog Supply Voltage
2
Digital Logic Supply Voltage
3
PLL Supply Voltage
4
Voltage difference VDDX to VDDR and VDDA
5
Voltage difference VSSX to VSSR and VSSA
6
Digital I/O Input Voltage
7
Analog Reference
8
XFC, EXTAL, XTAL inputs
9
TEST input
Instantaneous Maximum Current
10
Single pin limit for all digital I/O pins
Instantaneous Maximum Current
11
Single pin limit for XFC, EXTAL, XTAL
Instantaneous Maximum Current
12
Single pin limit for TEST
13
Storage Temperature Range
NOTES:
1. Beyond absolute maximum ratings device might be damaged.
Table A-1 Absolute Maximum Ratings
Rating
2
2
3
4
5
MC9S12DT256 Device User Guide — V03.07
or V
range during instantaneous and
DD5
DD
> V
) is greater than I
in
DD5
or V
).
SS5
DD5
1
Symbol
Min
V
-0.3
DD5
V
-0.3
DD
V
-0.3
DDPLL
∆
-0.3
VDDX
∆
-0.3
VSSX
V
-0.3
IN
V
V
-0.3
RH,
RL
V
-0.3
ILV
V
-0.3
TEST
I
-25
D
I
-25
DL
I
-0.25
DT
T
– 65
stg
, the
DD5
Max
Unit
6.0
V
3.0
V
3.0
V
0.3
V
0.3
V
6.0
V
6.0
V
3.0
V
10.0
V
+25
mA
+25
mA
0
mA
°C
155
91
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