MC9S08QA4_09 Datasheet, PDF (9/32 Pages) Freescale Semiconductor, Inc – Technical Data

Electrical Characteristics
6 _{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.
7 _{Power supply must maintain regulation within operating VDD 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
clock rate is very low (which would reduce overall power consumption).
40
PULLUP RESISTOR TYPICALS
85°C
25°C
–40°C
35
PULLDOWN RESISTOR TYPICALS
40
85°C
25°C
–40°C
35
30
30
25
25
20
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
V_DD (V)
20
1.8
2.3
2.8
V_DD (V)
3.3 3.6
Figure 3. Pullup and Pulldown Typical Resistor Values (V_DD = 3.0 V)
1.2
1
0.8
0.6
0.4
0.2
0
0
TYPICAL V_OL VS I_OL AT V_DD = 3.0 V
85°C
25°C
–40°C
TYPICAL V_OL VS V_DD
0.2
0.15
0.1
0.05
85°C, I_OL = 2 mA
25°C, I_OL = 2 mA
0
–40°C, I_OL = 2 mA
5
10
15
20
I_OL (mA)
1
2
3
4
V_DD (V)
Figure 4. Typical Low-Side Driver (Sink) Characteristics — Low Drive (PTxDSn = 0)
1
0.8
0.6
0.4
0.2
0
0
85°C
25°C
–40°C
TYPICAL V_OL VS I_OL AT V_DD = 3.0 V
TYPICAL V_OL VS V_DD
0.4
85°C
25°C
0.3
–40°C
10
20
I_OL (mA)
0.2
0.1
0
30
1
I_OL = 6 mA
I_OL = 3 mA
2
3
V_DD (V)
I_OL = 10 mA
4
Figure 5. Typical Low-Side Driver (Sink) Characteristics — High Drive (PTxDSn = 1)
MC9S08QA4 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor
9