SiT1532是目前世界上體積較小,功耗較低并優化了手機和其他電池供電的32KHz振蕩器。 SiTime的MEMS技術使它有較小的1.5×0.8 CSP芯片級封裝,超越石英較小封裝XTALs。SiT15xx系列以多種方式克服了基于石英器件的限制,電路板占位面積減小了85%,功耗降低了50%,可靠性提高了15倍,所有這些都有助于實現體積更小、功耗更低和更耐用的移動電子產品。
SiT1532可在1.5V -3.63V 電壓范圍穩定工作,支持鋰電、超級電容等供電設備供電。 內置濾波電路,無需額外的Vdd旁路電容。 SIT1532輸出驅動能力強,無需額外負載電容,在智能儀表,可穿戴產品乃至基礎性時鐘產品領域具備廣泛的應用前景。
Frequency (kHz) |
32.768 |
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Frequency Tolerance |
10 PPM |
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Temp Range (°C) | -10 to +70, -40 to +85 | ||
Supply Voltage (V) | 1.2 - 3.63 | ||
NanoDrive? Reduced Swing Programmable Output Range | 300mV to 700mV, and full swing LVCMOS | ||
Package LxWxH (mm) | 1.5 x 0.8 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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