Freescale Semiconductor, Inc.
10.3.2 MC68340V (3.3 V)
The MC68340V can operate with a 3.3-V power supply for significant power savings. The
formula for power dissipation is
2
P ≈ V × f + dc
d
Table 10-2 shows typical electrical characteristics for both the MC68340 and MC68340V.
Table 10-2. Typical Electrical Characteristics
Parameter
MC68340 (5.0 V)
MC68340V (3.3 V)
Clock Frequency
0–16.78 MHz
0–25 MHz
0–8.39 MHz
0–16.78 MHz
Typical Current (16 MHz)
Typical Current (8 MHz)
Standby Current
95 mA
55 mA
60 µA
TBD
30 mA
25 µA
Running at 3.3 V saves 66% of the power consumption.
The 3.3 V operation provides the following user advantages:
Advantage
Lower Supply Voltage
Fewer Batteries
Benefit
Fewer Batteries
Less Weight
Smaller Size
Lower Current Drain
Less Heat Generated
Extended Battery Life
No Fan
No Fan Noise
Less EMF Radiation
Easier FCC Certification
Less Crosstalk
Closer PCB Traces
High Functional Integration
All-In-One 3.3 V Part:
Processor
Peripherals
Glue Logic
These advantages result in a much more portable system.
MOTOROLA
MC68340 USER’S MANUAL
10-13
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