mcf5271 Freescale Semiconductor, Inc, mcf5271 Datasheet - Page 34

• Manufacturer Part Number: mcf5271
• Description: Mcf5271 Integrated Microprocessor
• Manufacturer: Freescale Semiconductor, Inc

Preliminary Electrical Characteristics
8.3
34
Core Supply Voltage
Pad Supply Voltage
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
V
in
The average chip-junction temperature (T
Where:
For most applications P
and T
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
= V
7
8
9
10
J
can be obtained by solving equations (1) and (2) iteratively for any value of T
DD
Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL
SPEC-883 Method 1012.1).
Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL
SPEC-883 Method 1012.1).
Thermal characterization parameter indicating the temperature difference between package top and the
junction temperature per JEDEC JESD51-2. When Greek letters are not available, the thermal
characterization parameter is written in conformance with Psi-JT.
Thermal characterization parameter indicating the temperature difference between package top and the
junction temperature per JEDEC JESD51-2. When Greek letters are not available, the thermal
characterization parameter is written in conformance with Psi-JT.
DC Electrical Specifications
J
T
4
P
P
P
or V
A
D
INT
I/O
(if P
JMA
= Ambient Temperature, qC
= P
SS
= Power Dissipation on Input and Output Pins — User Determined
= I
, Input-only pins
I/O
= Package Thermal Resistance, Junction-to-Ambient, qC/W
INT
DD
Characteristic
is neglected) is:
D
P
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2
u V
(at equilibrium) for a known T
I/O
DD
K = P
I/O
, Watts - Chip Internal Power
D
P
u (T
Table 28. DC Electrical Specifications
INT
A
P
+ 273 qC) + 4
T
and can be ignored. An approximate relationship between P
D
J
=
=
K
T
A
y
+
J
T
) in qC can be obtained from:
P
J
JMA
D
+
u
273qC
4
u P
A
Symbol
JMA
OV
V
. Using this value of K, the values of P
V
V
D
V
HYS
I
DD
in
IH
IL
2
DD
(1)
(2)
(3)
0.06 OV
0.7 OV
V
SS
1.35
–1.0
Min
3
– 0.3
DD
DD
1
Typical
—
—
—
—
—
—
Freescale Semiconductor
A
.
0.35 OV
Max
1.65
3.65
3.6
1.0
—
D
DD
and
D
Unit
mV
PA
V
V
V
V