mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 329

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC16Y3/916Y3
USER’S MANUAL
Num
The average chip-junction temperature (TJ) in C can be obtained from:
where:
For most applications P
P
Solving equations 1 and 2 for K gives:
where K is a constant pertaining to the particular part. K can be determined from equation (3)
by measuring P
T
D
J
1
can be obtained by solving equations (1) and (2) iteratively for any value of T
and T
Thermal Resistance
T
P
P
P
A
D
INT
I/O
JA
Plastic 160-Pin Surface Mount
= Ambient Temperature, C
J
= P
= Package Thermal Resistance, Junction-to-Ambient, C/W
= Power Dissipation on Input and Output Pins — User Determined
(if P
= I
K
INT
DD
=
I/O
D
P
(at equilibrium) for a known T
is neglected) is:
P
D
V
Freescale Semiconductor, Inc.
I/O
DD
Characteristic
For More Information On This Product,
Table A-3 Thermal Characteristics
, Watts — Chip Internal Power
I/O
T
P
A
ELECTRICAL CHARACTERISTICS
D
+
T
P
J
273 C
=
INT
=
K
Go to: www.freescale.com
and can be neglected. An approximate relationship between
T
A
+
T
+
J
P
+
D
JA
273 C
P
A
JA
. Using this value of K, the values of P
D
2
(1)
(2)
(3)
Symbol
JA
Value
37
A
.
Unit
C/W
D
and
MOTOROLA
A-3