MC9S08EL32 Datasheet, PDF (330/356 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Appendix A Electrical Characteristics
Table A-2. Absolute Maximum Ratings
Rating
Symbol
Value
Unit
Supply voltage
Maximum current into V_DD
Digital input voltage
Instantaneous maximum current
Single pin limit (applies to all port pins)^{1, 2, 3}
V_DD
–0.3 to +5.8
V
I_DD
120
mA
V_In
–0.3 to V_DD + 0.3
V
I_D
± 25
mA
Storage temperature range
T_stg
–55 to 150
°C
1 _{Input must be current limited to the value specified. To determine the value of the required}
current-limiting resistor, calculate resistance values for positive (V_DD) and negative (V_SS) clamp
voltages, then use the larger of the two resistance values.
2 _{All functional non-supply pins are internally clamped to VSS and VDD.}
3 _{Power supply must maintain regulation within operating VDD range during instantaneous and}
operating maximum current conditions. If positive injection current (V_In > V_DD) is greater than
I_DD, the injection current may flow out of V_DD and could result in external power supply going
out of regulation. Ensure external V_DD load shunts current greater than maximum injection
current. This is the greatest risk when the MCU is not consuming power. For example, if no
system clock is present, or if the clock rate is very low (which would reduce overall power
consumption).
A.4 Thermal Characteristics
This section provides information about operating temperature range, power dissipation, and package
thermal resistance. Power dissipation on I/O pins is usually small compared to the power dissipation in
on-chip logic and voltage regulator circuits, and it is user-determined rather than being controlled by the
MCU design. To take P_I/O into account in power calculations, determine the difference between actual pin
voltage and V_SS or V_DD and multiply by the pin current for each I/O pin. Except in cases of unusually high
pin current (heavy loads), the difference between pin voltage and V_SS or V_DD is very small.
Table A-3. Thermal Characteristics
Num
1
2
3
4
C
Rating
Symbol
Operating temperature range (packaged)
Temperature Code M
—
Temperature Code V
T_A
Temperature Code C
Thermal resistance^1,2 Single-layer board
D
20-pin TSSOP
θ_JA
28-pin TSSOP
Thermal resistance^1,2 Four-layer board
20-pin TSSOP
D
θ_JA
28-pin TSSOP
D Maximum junction temperature
T_J
Value
–40 to 125
–40 to 105
–40 to 85
113
91
73
58
135
Unit
°C
°C/W
°C/W
°C
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
332
Freescale Semiconductor