MC68HC908LB8_05 Datasheet, PDF (222/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Electrical Specifications
20.3 Functional Operating Range
Characteristic
Operating temperature range
Operating voltage range
Symbol
T_A
V_DD
Value
Unit
–40 to +125
°C
5.0 ±10%
V
20.4 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
20-pin SOIC
20-pin PDIP
θ_JA
90
°C/W
70
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 × (T_A + 273 °C)
+ P_D2 × θ_JA
W/°C
Average junction temperature
T_J
T_A + (P_D × θ_JA)
°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.
20.5 5.0-Volt Electrical Characteristics
Characteristic⁽¹⁾
Output high voltage
I_Load = –8 mA, PTA[0–5], PTB[2–7], PTC1
I_Load = –15 mA, PTA6, PTB0, PTB1, PTC0
Maximum combined I_OH (all I/O pins)
Output low voltage
I_Load = 10 mA, RST
I_Load = 10 mA, PTA[0–5], PTB[2–7], PTC1
I_Load = 15 mA, PTA6, PTB0, PTB1, PTC0
Maximum combined I_OL (all I/O pins)
Input high voltage
All I/O pins
Input low voltage
All I/O pins
Symbol
V_OH
I_OHT
Min
V_DD – 0.4
V_DD – 0.8
—
Typ⁽²⁾
—
—
—
Max
—
—
50
Unit
V
mA
V_OL
—
—
—
—
—
—
I_OHL
—
—
V_IH
0.7 x V_DD
—
0.4
0.4
V
0.8
50
mA
V_DD
V
V_IL
V_SS
—
0.3 x V_DD
V
— Continued on next page
MC68HC908LB8 Data Sheet, Rev. 1
222
Freescale Semiconductor