Datasheet

Electrical Specifications
MC68HC908QB8 Data Sheet, Rev. 3
212 Freescale Semiconductor
18.8 3-V DC Electrical Characteristics
Characteristic
(1)
1. V
DD
= 2.7 to 3.3 Vdc, V
SS
= 0 Vdc, T
A
= T
L
to T
H
, unless otherwise noted.
Symbol Min
Typ
(2)
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.
Max Unit
Output high voltage
I
Load
= –0.6 mA, all I/O pins
I
Load
= –4.0 mA, all I/O pins
I
Load
= –10.0 mA, PTA0, PTA1, PTA3–PTA5 only
V
OH
V
DD
–0.3
V
DD
–1.0
V
DD
–0.8
—
—
—
—
—
—
V
Maximum combined I
OH
(all I/O pins) I
OHT
——50mA
Output low voltage
I
Load
= 0.5 mA, all I/O pins
I
Load
= 6.0 mA, all I/O pins
I
Load
= 10.0 mA, PTA0, PTA1, PTA3–PTA5 only
V
OL
—
—
—
—
—
—
0.3
1.0
0.8
V
Maximum combined I
OL
(all I/O pins) I
OHL
——50mA
Input high voltage
PTA0–PTA5, PTB0–PTB7
V
IH
0.7 x V
DD
—V
DD
V
Input low voltage
PTA0–PTA5, PTB0–PTB7
V
IL
V
SS
— 0.3 x V
DD
V
Input hysteresis
(3)
3. Values are based on characterization results, not tested in production.
V
HYS
0.06 x V
DD
—— V
DC injection current, all ports
(4)
4. Guaranteed by design, not tested in production.
I
INJ
–2 — +2 mA
Total dc current injection (sum of all I/O)
(4)
I
INJTOT
–25 — +25 mA
Ports Hi-Z leakage current I
IL
–1 ±0.1 +1 μA
Capacitance
Ports (as input)
(3)
C
IN
——8pF
POR rearm voltage V
POR
750 — — mV
POR rise time ramp rate
(3)(5)
5. 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.
R
POR
0.035 — — V/ms
Monitor mode entry voltage
(3)
V
TST
V
DD
+ 2.5 — V
DD
+ 4.0 V
Pullup resistors
(6)
PTA0–PTA5, PTB0–PTB7
6. R
PU
is measured at V
DD
= 3.0 V
R
PU
16 26 36 kΩ
Pulldown resistors
(7)
PTA0–PTA5
7. R
PD
is measured at V
DD
= 3.0 V, Pulldown resistors only available when KBIx is enabled with KBIxPOL =1.
R
PD
16 26 36 kΩ
Low-voltage inhibit reset, trip falling voltage V
TRIPF
2.40 2.55 2.70 V
Low-voltage inhibit reset, trip rising voltage
(6)
V
TRIPR
2.475 2.625 2.775 V
Low-voltage inhibit reset/recover hysteresis V
HYS
—75—mV