MC9S08QB8 Datasheet, PDF (11/36 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit

Electrical Characteristics
Table 7. DC Characteristics (continued)
Num C
Characteristic
Symbol
Condition
Min Typical¹ Max
Unit
Total
leakage
10
C
combined
for all inputs
All input only and I/O |I_OZTOT| V_In = V_DD or V_SS
—
—
and Hi-Z
pins
2
μA
Pullup,
11 P Pulldown
resistors
all digital inputs except
PTA5/IRQ/TCLK/RESET,
when enabled
R_PU,
R_PD
—
17.5
—
52.5
kΩ
Pullup,
12 C Pulldown
resistors
PTA5/IRQ/TCLK/RESET, R_PU,
when enabled² R_PD
—
17.5
—
52.5
kΩ
DC injection
Single pin limit
–0.2
—
13 D current ^{3, 4,} _{Total MCU limit, includes} I_IC V_IN < V_SS, V_IN > V_DD
5
sum of all stressed pins
–5
—
0.2
mA
5
mA
14 C Input Capacitance, all pins
C_In
—
—
—
8
pF
15 C RAM retention voltage
16 C POR re-arm voltage⁶
V_RAM
—
V_POR
—
—
0.6
1.0
V
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 Reference⁷
V_BG
—
1.15
1.17
1.18
V
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 VSS and VDD.}
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 VDD 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 VDD = 3.0 V, Temp = 25 °C}
MC9S08QB8 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor
11