5.0-V DC Electrical Characteristics
MC68HC908GT16 MC68HC908GT8 Data Sheet, Rev. 3
Freescale Semiconductor
255
20.5 5.0-V DC Electrical Characteristics
Characteristic
(1)
1. V
DD
= 5.0 Vdc
±
10%, V
SS
= 0 Vdc, T
A
= T
A
(min) to T
A
(max), unless otherwise noted
2. Typical values reflect average measurements at midpoint of voltage range, 25
°
C only.
3. Some disturbance of the ADC accuracy is possible during any injection event and is dependent on board layout and power
supply decoupling. This parameter is guaranteed by characterization.
4. Pullups and pulldowns are disabled. Port B leakage is specified in
20.16 ADC Characteristics
.
5. Maximum is highest voltage that POR is guaranteed.
6. Maximum is highest voltage that POR is possible.
7. If minimum V
DD
is not reached before the internal POR reset is released, RST must be driven low externally until minimum
V
DD
is reached.
Symbol
Min
Typ
(2)
Max
Unit
Output high voltage
(I
Load
= –2.0 mA) all I/O pins
(I
Load
= –10.0 mA) all I/O pins
(I
Load
= –20.0 mA) pins PTC0–PTC4 only
Maximum combined I
OH
for port C, port E,
port PTD0–PTD3
Maximum combined I
OH
for port PTD4–PTD7,
port A, port B
Maximum total I
OH
for all port pins
Output low voltage
(I
Load
= 1.6 mA) all I/O pins
(I
Load
= 10 mA) all I/O pins
(I
Load
= 20mA) pins PTC0–PTC4 only
Maximum combined I
OL
for port C, port E,
port PTD0–PTD3
Maximum combined I
OL
for port PTD4–PTD7,
port A, port B
Maximum total I
OL
for all port pins
Input high voltage
All ports, IRQ, RST, OSC1
Input low voltage
All ports, IRQ, RST, OSC1
DC injection current, all ports
(3)
Total DC current injection (sum of all I/O)
(3)
I/O ports Hi-Z leakage current
(4)
Input current
Pullup resistors (as input only)
Ports PTA7/KBD7–PTA0/KBD0, PTC6–PTC0,
PTD7/T2CH1–PTD0/SS
Capacitance
Ports (as input or output)
Monitor mode entry voltage
Low-voltage inhibit, trip falling voltage
Low-voltage inhibit, trip rising voltage
Low-voltage inhibit reset/recover hysteresis
(V
TRIPF
+ V
HYS
= V
TRIPR
)
POR rearm voltage
(5)
POR reset voltage
(6)
POR rise time ramp rate
(7)
V
OH
V
OH
V
OH
I
OH1
I
OH2
I
OHT
V
DD
– 0.8
V
DD
– 1.5
V
DD
– 1.5
—
—
—
—
—
—
—
—
—
—
—
—
50
50
100
V
V
V
mA
mA
mA
V
OL
V
OL
V
OL
I
OL1
I
OL2
I
OLT
—
—
—
—
—
—
—
—
—
—
—
—
0.4
1.5
1.5
50
50
100
V
V
V
mA
mA
mA
V
IH
0.7
×
V
DD
—
V
DD
V
V
IL
V
SS
—
0.2
×
V
DD
V
I
INJ
– 2.0
– 25
—
—
—
—
—
—
+ 2.0
+25
±
10
±
1
mA
mA
μ
A
μ
A
I
INJTOT
I
IL
I
In
R
PU
20
45
65
k
C
Out
C
In
V
TST
V
TRIPF
V
TRIPR
—
—
—
—
—
4.25
4.35
12
8
pF
V
DD
+ 2.5
3.90
4.20
V
DD
+ 4.0
4.50
4.60
V
V
V
V
HYS
—
100
—
mV
V
POR
V
PORRST
R
POR
0
0
—
700
—
100
800
—
mV
mV
V/ms
0.035