Ultra-low-power 32.768 kHz MEMS oscillator in a 1.5 x 0.8 mm chip-scale package for replacing tuning-fork crystals in battery-backed timekeeping circuits. It operates from 1.2 V to 3.63 V, with frequency stability to 100 ppm over -40°C to +85°C and 10 ppm initial tolerance at 25°C. Typical core current is 0.90 μA at 1.8 V with no load, and the NanoDrive programmable output swing helps reduce total power. The device drives XTAL inputs directly, eliminates external load capacitors, and includes internal power-supply filtering that avoids an external bypass capacitor under normal conditions.
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Sitime SiT1532AC-J5-D14-32.768 technical specifications.
| Output Frequency | 32.768kHz |
| Frequency Tolerance | 10ppm |
| Frequency Stability | 100 over -40°C to +85°C at 1.5 V to 3.63 Vppm |
| Operating Supply Voltage | 1.2 to 3.63V |
| Core Operating Current | 0.90 typ at 1.8 V, no loadμA |
| Output Stage Operating Current | 0.065 typ, 0.125 maxμA/Vpp |
| Start-up Time | 180 typ, 300 maxms |
| Operating Temperature Range | -40 to +85°C |
| Output Rise/Fall Time | 100 typ, 200 max at 15 pF loadns |
| Duty Cycle | 48 to 52% |
| Aging | -1 to 1 first year at 25°Cppm |
| ESD Protection | 3000 HBMV |
| Package Size | 1.5 x 0.8mm |
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