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8 ELECTRICAL CHARACTERISTICS
A-72 EPSON S1C33L03 PRODUCT PART
8.2 Recommended Operating Conditions
1) 3.3 V/5.0 V dual power source
(VSS=0V)
Item Symbol Condition Min. Typ. Max. Unit ∗
Supply voltage (high voltage) VDDE 4.50 5.00 5.50 V
Supply voltage (low voltage) VDD 2.70 – 3.60 V
Input voltage HVI VSS –VDDE V
LVI VSS –VDD V
CPU operating clock frequency fCPU ––50MHz
External bus operating clock frequency fBUS ––35MHz
Low-speed oscillation frequency fOSC1 –32.768– kHz
Operating temperature Ta -40 25 85 °C
Input rise time (normal input) tri – – 50 ns
Input fall time (normal input) tfi – – 50 ns
Input rise time (schmitt input) tri ––5ms
Input fall time (schmitt input) tfi ––5ms
2) 3.3 V single power source
(VDDE=VDD, VSS=0V)
Item Symbol Condition Min. Typ. Max. Unit ∗
Supply voltage VDD 2.70 – 3.60 V
Input voltage VI VSS –VDD V
CPU operating clock frequency fCPU ––50MHz
External bus operating clock frequency fBUS ––35MHz
Low-speed oscillation frequency fOSC1 –32.768– kHz
Operating temperature Ta -40 25 85 °C
Input rise time (normal input) tri – – 50 ns
Input fall time (normal input) tfi – – 50 ns
Input rise time (schmitt input) tri ––5ms
Input fall time (schmitt input) tfi ––5ms
3) 2.0 V single power source
(VDDE=VDD, VSS=0V)
Item Symbol Condition Min. Typ. Max. Unit ∗
Supply voltage VDD 1.80 2.00 2.20 V
Input voltage VI VSS –VDD V
CPU operating clock frequency fCPU ––20MHz
External bus operating clock frequency fBUS ––20MHz
Low-speed oscillation frequency fOSC1 –32.768– kHz
Operating temperature Ta -40 25 85 °C
Input rise time (normal input) tri – – 100 ns
Input fall time (normal input) tfi – – 100 ns
Input rise time (schmitt input) tri – – 10 ms
Input fall time (schmitt input) tfi – – 10 ms