Datasheet

Electrical Characteristics
MC9S08QB8 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor 11
10 C
Tot al
leakage
combined
for all inputs
and Hi-Z
pins
All input only and I/O |I
OZTOT
|V
In
= V
DD
or V
SS
—— 2μA
11 P
Pullup,
Pulldown
resistors
all digital inputs except
PTA5/IRQ/TCLK/RESET
,
when enabled
R
PU,
R
PD
—17.5—52.5kΩ
12 C
Pullup,
Pulldown
resistors
PTA5/IRQ/TCLK/RESET,
when enabled
2
R
PU,
R
PD
—17.5—52.5kΩ
13 D
DC injection
current
3, 4,
5
Single pin limit
I
IC
V
IN
< V
SS
, V
IN
> V
DD
–0.2 — 0.2 mA
Total MCU limit, includes
sum of all stressed pins
–5 — 5 mA
14 C Input Capacitance, all pins C
In
———8pF
15 C RAM retention voltage V
RAM
——0.61.0V
16 C POR re-arm voltage
6
V
POR
— 0.9 1.4 2.0 V
17 D POR re-arm time t
POR
—10——μs
18 P Low-voltage detection threshold V
LVD
V
DD
falling
V
DD
rising
1.80
1.88
1.84
1.92
1.88
1.96
V
19 P Low-voltage warning threshold V
LVW
V
DD
falling
V
DD
rising
2.08 2.14 2.26 V
20 C
Low-voltage inhibit reset/recover
hysteresis
V
hys
——80—mV
21 P Bandgap Voltage Reference
7
V
BG
— 1.151.171.18V
1
Typical values are measured at 25 °C. Characterized, not tested
2
The specified resistor value is the actual value internal to the device. The pullup or pulldown value may appear lower when
measured externally on the pin.
3
All functional non-supply pins, except for PTA5 are internally clamped to V
SS
and V
DD
.
4
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.
5
Power supply must maintain regulation within operating V
DD
range during instantaneous and operating maximum current
conditions. If the 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 that 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).
6
Maximum is highest voltage that POR is guaranteed.
7
Factory trimmed at V
DD
= 3.0 V, Temp = 25 °C
Table 7. DC Characteristics (continued)
Num C Characteristic Symbol Condition Min Typical
1
Max Unit