Frequency Range (kHz) |
32.768 |
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Frequency Tolerance |
20 PPM |
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Temp Range (°C) | -10 to +70, -40 to +85 | ||
Supply Voltage (V) | 1.2 - 3.63 | ||
NanoDrive? Reduced Swing Output | 250mV to 1.15V | ||
Package LxWxH (mm) | 2.0 x 1.2 x 0.6 | ||
Status | Production | ||
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特點 | 優勢 |
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SIT153x TempFlat是石英溫漂性能的2-3倍
SIT15XX只有石英產品體積的85%,功耗降低至少50%
MCU 32 kHz Oscillator Operating Modes
Most energy efficient MCUs implement on-chip 32.768 kHz oscillators as a variant of a Pierce oscillator with either fixed or adjustable inverting gain stage as show in Figure 1.
This low frequency oscillator can be configured to operate in three distinct modes as shown in
Figure 2.
1.Mode-1: Resonator only mode: drives a 32.768 kHz quartz resonator
2.Mode-2: Accept a sine wave input ≥200 mVpp on XIN pin
3.Mode-3: Digital logic level clock input after bypassing or shutting off the on-chip oscillator. For oscillator inputs compatible to 1.8V logic levels, a smaller swing NanoDrive supportedby the SiT15xx can be leveraged to save addition al power.
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