
Appendix A Electrical Characteristics and Timing Specifications
MC9S08AC16 Series Data Sheet, Rev. 9
298
Freescale Semiconductor
15
P Low-voltage detection threshold — high range
VDD falling
VDD rising
VLVDH
4.2
4.3
4.4
4.5
V
16
P
Low-voltage detection threshold — low range
VDD falling
VDD rising
VLVDL
2.48
2.54
2.56
2.62
2.64
2.7
V
17
P
Low-voltage warning threshold — high range
VDD falling
VDD rising
VLVWH
4.2
4.3
4.4
4.5
V
18
P
Low-voltage warning threshold — low range
VDD falling
VDD rising
VLVWL
2.48
2.54
2.56
2.62
2.64
2.7
V
19
P
Low-voltage inhibit reset/recover hysteresis
5V
3V
Vhys
—
100
35
—
mV
20
P Bandgap voltage reference
Factory trimmed at VDD = 5.0 V Temp = 25 C
VBG
1.185
1.202
1.215
V
21
D
DC injection current5, 6, 7, 8
|IIC|
Single pin limit
VIN > VDD
0—2
mA
VIN < VSS
0—
–0.2
mA
Total MCU limit, includes sum of all stressed pins
VIN > VDD
0—
25
mA
VIN < VSS
0—
–5
mA
1 Typical values are based on characterization data at 25
C unless otherwise stated.
2 Measured with V
In = VDD or VSS.
3 Measured with V
In = VSS.
4 Measured with V
In = VDD.
5 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 clock rate is very low which (would reduce overall power
consumption).
6 All functional non-supply pins are internally clamped to V
SS and VDD.
7 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.
8 IRQ does not have a clamp diode to V
DD. Do not drive IRQ above VDD.
Table A-6. DC Characteristics (continued)
Num C
Parameter
Symbol
Min
Typ1
Max
Unit