st72f321r STMicroelectronics, st72f321r Datasheet - Page 173

• Manufacturer Part Number: st72f321r
• Description: 64/44-pin 8-bit Mcu With 32 To 60k Flash/rom, Adc, Five Timers, Spi, Sci, I2c Interface
• Manufacturer: STMicroelectronics

13.2 THERMAL CHARACTERISTICS
Notes:
1. The power dissipation is obtained from the formula P
and P
2. The average chip-junction temperature can be obtained from the formula T
PORT
Symbol
T
R
P
Jmax
is the port power dissipation determined by the user.
thJA
D
Package thermal resistance (junction to ambient)
Power dissipation
Maximum junction temperature
1)
Ratings
D
=P
2)
INT
+P
PORT
TQFP64 14x14
TQFP64 10x10
TQFP44 10x10
where P
J
= T
INT
A
is the chip internal power (I
+ P
D
x RthJA.
Value
150
500
47
50
52
ST72321
°C/W
DD
Unit
173/189
mW
°C
xV
DD
)