This device is a fixed-frequency 32.768 kHz MEMS oscillator designed as a replacement for 2012 SMD quartz crystals in battery-powered timekeeping applications. It operates from 1.2 V to 3.63 V, with full -40 °C to +85 °C operation specified from 1.5 V to 3.63 V, and it delivers 20 ppm frequency tolerance at 25 °C. Typical core supply current is 0.90 µA at 1.8 V with no load, and start-up to a valid output is specified at 180 ms typical. The oscillator provides a programmable NanoDrive output, does not require external load capacitors, and includes internal supply filtering that can eliminate an external bypass capacitor in typical use.
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Sitime SiT1533AI-H4-D26-32.768 technical specifications.
| Output frequency | 32.768kHz |
| Frequency tolerance at 25°C | 20ppm |
| Frequency stability over -40°C to +85°C | 100 maxppm |
| Frequency stability over -10°C to +70°C | 75 maxppm |
| Aging, first year | ±1ppm |
| Supply voltage range | 1.2 to 3.63V |
| Supply voltage range for -40°C to +85°C | 1.5 to 3.63V |
| Core operating current | 0.90 typµA |
| Output stage operating current | 0.065 typµA/Vpp |
| Start-up time at power-up | 180 typ, 300 maxms |
| Power-supply ramp time | 100 maxms |
| Operating temperature range | -40 to +85°C |
| Duty cycle | 48 to 52% |
| Period jitter | 35ns RMS |
| ESD protection, HBM | 3000V |
| Package size | 2.0 x 1.2mm |
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