MC908GR8CDWE Datasheet, PDF (363/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Electrical Specifications
Functional Operating Range
23.3 Functional Operating Range
Table 23-2. Functional Operation Range
Characteristic
Symbol
Value
Unit
Operating temperature range
T_A
–40 to +125
°C
Operating voltage range
V_DD
3.0 ±10%
5.0 ±10%
V
NOTE:
To ensure correct operation of the MCU under all operating conditions,
the user must write data $1C to address $0033 immediately after reset.
This is to ensure proper termination of an unused module within the
MCU.
23.4 Thermal Characteristics
Table 23-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
PDIP (28-pin)
SOIC (28-pin)
QFP (32-pin)
θ_JA
60
60
°C/W
95
I/O pin power dissipation
P_I/O
User-Determined
W
Power dissipation⁽¹⁾
P_D
P_D = (I_DD × V_DD) + P_I/O =
K/(T_J + 273 °C)
W
Constant⁽²⁾
K
P_D x (T_A + 273 °C)
+ P_D2 × θ_JA
W/°C
Average junction temperature
T_J
T_A + (P_D × θ_JA)
°C
Maximum junction temperature
T_JM
140
°C
Notes:
1. Power dissipation is a function of temperature.
2. K is a constant unique to the device. K can be determined for a known T_A and measured
P_D. With this value of K, P_D and T_J can be determined for any value of T_A.
MC68HC908GR8 — Rev 4.0
MOTOROLA
Electrical Specifications
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Technical Data
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