DC Electrical Characteristics
56F827 Technical Data
19
3.
Junction to case thermal resistance, Theta-JC (R
θ
JC
), was simulated to be equivalent to the
measured values using the cold plate technique with the cold plate temperature used as the "case"
temperature. The basic cold plate measurement technique is described by MIL-STD 883D, Method
1012.1. This is the correct thermal metric to use to calculate thermal performance when the package
is being used with a heat sink.
Thermal Characterization Parameter, Psi-JT (
Ψ
JT
), is the "resistance" from junction to reference
point thermocouple on top center of case as defined in JESD51-2.
Ψ
JT
is a useful value to use to
estimate junction temperature in steady state customer environments.
Junction temperature is a function of on-chip power dissipation, package thermal resistance,
mounting site (board) temperature, ambient temperature, air flow, power dissipation of other
components on the board, and board thermal resistance.
See Section 5.1 from more details on thermal design considerations.
4.
5.
6.
3.2 DC Electrical Characteristics
Table 7. DC Electrical Characteristics
Operating Conditions:
V
SSIO
=V
SS
= V
SSA
= 0V, V
DDA
=V
DDIO
=3.0–3.6V, V
DD
= 2.25–2.75V, T
A
= –40
°
to +85
°
C, C
L
≤
50pF, f
op
= 80MHz
Characteristic
Symbol
Min
Typ
Max
Unit
Input high voltage (XTAL/EXTAL)
V
IHC
2.25
—
3.6
V
Input low voltage (XTAL/EXTAL)
V
ILC
0
—
0.5
V
Input high voltage (Schmitt trigger inputs)
1
V
IHS
2.2
—
5.5
V
Input low voltage (Schmitt trigger inputs)
2
V
ILS
-0.3
—
0.8
V
Input high voltage (all other digital inputs)
V
IH
2.0
—
5.5
V
Input low voltage (all other digital inputs)
V
IL
-0.3
—
0.8
V
Input current high (pull-up/pull-down resistors disabled,
V
IN
=V
DD
)
I
IH
-1
—
1
μ
A
Input current low (pull-up/pull-down resistors disabled, V
IN
=V
SS
)
I
IL
-1
—
1
μ
A
Input current high (with pull-up resistor, V
IN
=V
DD
)
I
IHPU
-0
—
1
μ
A
Input current low (with pull-up resistor, V
IN
=V
SS
)
I
ILPU
-210
—
-50
μ
A
Input current high (with pull-down resistor, V
IN
=V
DD
)
I
IHPD
20
—
180
μ
A
Input current low (with pull-down resistor, V
IN
=V
SS
)
I
ILPD
-1
—
1
μ
A
Nominal pull-up or pull-down resistor value
R
PU
, R
PD
30
K
Output tri-state current low
I
OZL
-10
—
10
μ
A
Output tri-state current high
I
OZH
-10
—
10
μ
A
Input current high (analog inputs, V
IN
=V
DDA
)
2
I
IHA
-15
—
15
μ
A
Input current low (analog inputs, V
IN
=V
SSA
)
2
I
ILA
-15
—
15
μ
A
Output High Voltage (at I
OH
)
V
OH
V
DD
– 0.7
—
—
V
Output Low Voltage (at I
OL
)
V
OL
—
—
0.4
V
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.