mc9s08qa4 Freescale Semiconductor, Inc, mc9s08qa4 Datasheet - Page 9

• Manufacturer Part Number: mc9s08qa4
• Description: Mc9s08qa4 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

6
7
Freescale Semiconductor
Input must be current-limited to the value specified. To determine the value of the required current-limiting resistor, calculate
resistance values for positive and negative clamp voltages, then use the larger of the two values.
Power supply must maintain regulation within operating V
conditions. If positive injection current (V
in external power supply going out of regulation. Ensure external V
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or if
clock rate is very low (which would reduce overall power consumption).
40
35
30
25
20
1.2
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
1.8
1
0
1
0
0
0
2
–40°C
Figure 5. Typical Low-Side Driver (Sink) Characteristics
85°C
25°C
Figure 4. Typical Low-Side Driver (Sink) Characteristics
2.2
–40°C
85°C
25°C
PULLUP RESISTOR TYPICALS
TYPICAL V
5
2.4
Figure 3. Pullup and Pulldown Typical Resistor Values (V
TYPICAL V
10
2.6
V
OL
DD
I
VS I
OL
(V)
2.8
10
(mA)
OL
OL
I
OL
VS I
AT V
(mA)
3
OL
DD
AT V
= 3.0 V
3.2
20
In
DD
15
> V
= 3.0 V
3.4
–40°C
DD
85°C
25°C
MC9S08QA4 Series, Rev. 2
) is greater than I
3.6
20
30
DD
range during instantaneous and operating maximum current
DD
40
35
30
25
20
0.15
0.05
DD
0.2
0.1
1.8
, the injection current may flow out of V
0.4
0.3
0.2
0.1
0
load will shunt current greater than maximum injection
0
1
1
–40°C,
—
—
85°C,
25°C,
–40°C
85°C
25°C
PULLDOWN RESISTOR TYPICALS
2.3
High Drive (PTxDSn = 1)
Low Drive (PTxDSn = 0)
I
I
I
OL
OL
OL
TYPICAL V
2
= 2 mA
= 2 mA
= 2 mA
2
TYPICAL V
V
DD
DD
I
OL
V
V
(V)
= 3.0 V)
DD
= 3 mA
DD
2.8
OL
(V)
(V)
OL
VS V
Electrical Characteristics
I
OL
VS V
3
DD
= 6 mA
3
DD
DD
3.3
and could result
–40°C
85°C
25°C
I
3.6
OL
= 10 mA
4
4
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