s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 237

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

The average chip-junction temperature (T
where:
For most applications, P
T
Solving
where K is a constant pertaining to the particular part. K can be determined from equation 3 by measuring
P
solving
19.5 5-V DC Electrical Characteristics
Freescale Semiconductor
Output high voltage
Maximum combined I
Output low voltage
Maximum combined I
Input high voltage
Input low voltage
Input hysteresis
J
D
I
I
I
I
I
I
PTA0–PTA5, PTB0–PTB7, PTC3–PTC0, PTD7–PTD0
PTA0–PTA5, PTB0–PTB7, PTC3–PTC0, PTD7–PTD0
T
θ
P
P
P
(if P
Load
Load
Load
Load
Load
Load
(at equilibrium) for a known T
JA
A
D
int
I/O
= Ambient temperature, °C
= P
= Package thermal resistance, junction-to-ambient, °C/W
= I
I/O
= –2.0 mA, all I/O pins
= –10.0 mA, all I/O pins
= –15.0 mA, PTA0, PTA1, PTA3–PTA5 only
= 1.6 mA, all I/O pins
= 10.0 mA, all I/O pins
= 15.0 mA, PTA0, PTA1, PTA3–PTA5 only
= Power dissipation on input and output pins — user determined
Equation 19-1
Equation 19-1
DD
int
is neglected) is:
+ P
× V
I/O
DD
Characteristic
, Watts — chip internal power
OH
OL
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
(all I/O pins)
(all I/O pins)
and
and
I/O
Equation 19-2
Equation 19-2
<< P
K = P
(1)
int
A
. Using this value of K, the values of P
D
and can be neglected. An approximate relationship between P
P
× (T
T
D
J
= K ÷ (T
= T
A
iteratively for any value of T
J
for K gives:
) in °C can be obtained from:
+ 273°C) + θ
A
+ (P
J
+ 273°C)
D
× θ
Symbol
V
I
I
V
V
OHT
OHL
V
V
JA
HYS
OH
OL
IH
IL
JA
)
× (P
D
0.06 x V
)
0.7 x V
V
V
V
2
DD
DD
DD
Min
V
—
—
—
—
—
SS
–0.4
–1.5
–0.8
A
DD
DD
.
D
and T
5-V DC Electrical Characteristics
Typ
—
—
—
—
—
—
—
—
—
—
—
J
(2)
— Continued on next page
can be obtained by
0.3 x V
Max
V
0.4
1.5
0.8
50
50
—
—
—
—
DD
DD
Eqn. 19-1
Eqn. 19-2
Eqn. 19-3
D
Unit
mA
mA
and
V
V
V
V
V
237