8 ELECTRICAL CHARACTERISTICS
8.7 Oscillation Characteristics
Oscillation characteristics change depending on conditions (board pattern, components used, etc.). Use the following characteristics as reference values. In particular, when a ceramic or crystal oscillator is used, use the oscillator manufacturer recommended values for constants such as capacitance and resistance.
OSC1 crystal oscillation
(Unless otherwise specified: crystal=Q11C02RX#1 32.768kHz, Rf1=20MΩ | , CG1=CD1=15pF#2) | ||||||||
Item | Symbol | Condition |
| Min. | Typ. | Max. | Unit | ∗ |
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Operating temperature | Ta | VDD=2.7V to 3.6V |
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| 85 | ° C |
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#1 Q11C02RX: Crystal resonator made by Seiko Epson |
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#2 "CG1=CD1=15pF" includes board capacitance. |
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| (Unless otherwise specified: VDD=3.3V, VSS=0V, crystal=Q11C02RX#1 32.768kHz, | ||||||||
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| Rf1=20MΩ , CG1=CD1=15pF#2, Ta=25° C) | ||||||
Item | Symbol | Condition |
| Min. | Typ. | Max. | Unit | ∗ |
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Oscillation start time | tSTA1 |
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| 3 | sec |
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External gate/drain capacitance | CG1, CD1 | CG1=CD1, |
| 5 |
| 25 | pF |
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| including board capacitance |
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Frequency/IC deviation | ∆ f/∆ IC |
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| 10 | ppm |
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Frequency/power voltage deviation | ∆ f/∆ V |
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| 10 | ppm/V |
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Frequency adjustment range | ∆ f/∆ CG | CG=CD1= 5 to 25pF |
| 50 |
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| ppm |
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#1 Q11C02RX: Crystal resonator made by Seiko Epson #2 "CG1=CD1=15pF" includes board capacitance.
OSC3 crystal oscillation
Note: A "crystal resonator that uses a fundamental" should be used for the OSC3 crystal oscillation circuit.
(Unless otherwise specified: VSS=0V, crystal=Q22MA306#1 33.8688MHz, Rf2=1MΩ , CG1=CD1=15pF#2, Ta=25° C)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | ∗ |
Oscillation start time | tSTA3 | VDD=3.3V |
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| 10 | ms |
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#1 | Q22MA306: Crystal resonator made by Seiko Epson |
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#2 | "CG1=CD1=15pF" includes board capacitance. |
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OSC3 ceramic oscillation
(Unless otherwise specified: VSS=0V, Ta=25° C)
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| Item | Symbol |
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| Condition | Min. | Typ. | Max. |
| Unit | ∗ | ||
Oscillation start time | tSTA3 |
| 10MHz ceramic oscillator |
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| 10 |
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| 16MHz ceramic oscillator |
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| 10 |
| ms | 2 | ||
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| 20MHz ceramic oscillator |
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| 10 |
| ms | 3 | ||
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| 25MHz ceramic oscillator |
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| 5 |
| ms | 4 | ||
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| 33MHz ceramic oscillator |
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| 5 |
| ms | 5 | ||
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∗ note) | No. | Ceramic |
| Recommended constants | Power voltage |
| Remarks |
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| oscillator |
| CG2 (pF) | CD2 (pF) | Rf2 (MΩ ) | range (V) |
| (Manufacturer) |
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| 1 | CST25.00MXW0H1 |
| 5 | 5 | 1 | 2.7 to 3.6 | (Murata Mfg. corporation) |
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| 2 | CST33.00MXZ040 |
| Open |
| Open | 1 | 2.7 to 3.6 | (Murata Mfg. corporation) |
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∗ 1 This oscillator has a tendency to rise to the frequency of 0.3%.
S1C33210 PRODUCT PART | EPSON |