ST7MC1xx/ST7MC2xx
PACKAGE CHARACTERISTICS (Cont’d)
13.2 THERMAL CHARACTERISTICS
Symbol
RthJA
TJmax
PDmax
Ratings
Package thermal resistance (junction to ambient)
LQFP80 14x14
LQFP64 14x14
LQFP44 10x10
LQFP32 7x7
SDIP32 400mil
SDIP56 600mil
Maximum junction temperature1)
Power dissipation 2)
Notes:
Value
55
55
68
80
63
45
150
500
Unit
°C/W
°C
mW
1. The maximum chip-junction temperature is based on technology characteristics.
2. The maximum power dissipation is obtained from the formula PD = (TJ -TA) / RthJA.
The power dissipation of an application can be defined by the user with the formula: PD=PINT+PPORT
where PINT is the chip internal power (IDD x VDD) and PPORT is the port power dissipation depending on
the ports used in the application.
288/309