TS68302MAB Atmel Corporation, TS68302MAB Datasheet - Page 8

• Manufacturer Part Number: TS68302MAB
• Description: 16-bit Communication Controller, 16-20 MHz
• Manufacturer: Atmel Corporation

Figure 5. Clock Input Timing Diagram
Note:
Table 4. Thermal Characteristics at 25°C
Power Considerations
8
CERQUAD 132
Package
PGA 132
Timing measurements are referenced to and from a low voltage of 0.8V and a voltage of 2.0V, unless otherwise noted. The volt-
age swing through this range should start outside, and pass through, the range such that the rise or fall will be linear between
0.8V and 2.0V.
TS68302
t r (C)
0.8V
2.0V
Symbol
θ
θ
θ
θ
JC
JC
JA
JA
This device contains protective circuitry to protect the inputs against damage due to high
static voltages or electrical fields; however, it is advised that normal precautions be
taken to avoid application of any voltages higher than maximum-rated voltages to this
high-impedance circuit. Reliability of operation is enhanced if unused inputs are tied to
an appropriate logic voltage level (e.g., either GND or V
The average chip-junction temperature, T
T
θ
P
P
P
Note:
For most applications P
An approximate relationship between P
Solving equations (1) and (2) for K gives:
where K is a constant pertaining to the particular part. K can be determined from equa-
tion (3) by measuring P
values of P
value of T
Parameter
Thermal Resistance - Ceramic Junction To Ambient
Thermal Resistance - Ceramic Junction To Case
Thermal Resistance - Ceramic Junction To Ambient
Thermal Resistance - Ceramic Junction To Case
A
JA
D
INT
I/O
= Ambient Temperature, °C
= P
= Package Thermal Resistance, Junction-to-Ambient, °C/W
T
P
K = P
= Power Dissipation on Input and Output pins - user determined
= I
J
D
INT
= T
CC
= K ÷ (T
For T
D
A
A
+ P
⋅ V
.
D
⋅ (T
+ (P
A
CC
and T
I/O
= 70°C and P
A
, Watts - Chip Internal Power
J
D
+ 273) + θ
+ 273)
⋅ θ
J
JA
can be obtained by solving equations (1) and (2) iteratively for any
t f (C)
)
I/O
D
< 0,30 P
D
JA
(at equilibrium) for a known T
= 0.5 W at 12.5 MHz T
⋅ P
D
2
INT
t cyc
and can be neglected.
D
and T
J
, in °C can be obtained from:
J
(if P
j
= 88°C.
I/O
(1)
(2)
(3)
is neglected) is:
DD
).
A
. Using this value of K, the
Value
33
46
5
2
2117A–HIREL–11/02
°C/W
°C/W
°C/W
°C/W
Unit