MC68HC908QC16_07 Datasheet, PDF (238/274 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
Characteristic⁽¹⁾
Symbol
Min
Typ⁽²⁾
Max
Unit
DC injection current^{(3) (4) (5) (6)}
Single pin limit
V_in > V_DD
0
—
2
V_in < V_SS
I_IC
0
—
–0.2
mA
Total MCU limit, includes sum of all stressed pins
V_in > V_DD
V_in < V_SS
0
—
25
0
—
–5
Ports Hi-Z leakage current
Capacitance
Ports (as input)⁽³⁾
I_IL
0
—
±1
μA
C_IN
—
—
8
pF
POR rearm voltage
POR rise time ramp rate⁽³⁾⁽⁷⁾
V_POR
750
—
R_POR
0.035
—
—
mV
—
V/ms
Monitor mode entry voltage ⁽³⁾
V_TST
V_DD + 2.5
—
9.1
V
Pullup resistors⁽⁸⁾
PTA0–PTA5, PTB0–PTB7, PTC3–PTC0, PTD7–PTD0
R_PU
Pulldown resistors⁽⁶⁾
PTA0–PTA5
R_PD
16
26
36
kΩ
16
26
36
kΩ
Low-voltage inhibit reset, trip falling voltage⁽⁹⁾
V_TRIPF
3.90
4.20
4.50
V
Low-voltage inhibit reset, trip rising voltage
V_TRIPR
4.00
4.30
4.60
V
Low-voltage inhibit reset/recover hysteresis
V_HYS
—
100
—
mV
1. V_DD = 4.5 to 5.5 Vdc, V_SS = 0 Vdc, T_A = T_L to T_H, unless otherwise noted.
2. Typical values reflect average measurements at midpoint of voltage range, 25°C only. Typical values are for reference only
and are not tested in production.
3. Values are based on characterization results, not tested in production.
4. All functional non-supply pins are internally clamped to V_SS and V_DD.
5. 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.
6. Power supply must maintain regulation within operating V_DD 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).
7. If minimum V_DD is not reached before the internal POR reset is released, the LVI will hold the part in reset until minimum
V_DD is reached.
8. R_PU and R_PD, is measured at V_DD = 5.0 V. Pulldown resistors only available when KBIx is enabled with KBIxPOL =1.
9. Functionality of MCU guaranteed by production test down to minimum LVI trip point. The electrical parameters are only
guaranteed within the specified operating voltage range.
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 3
238
Freescale Semiconductor