| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | ISL1221IUZ | Real Time Clock/Calendar with Event Detection and Frequency Output | 386K |
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| 2 | ISL1221IUZ | Low Power RTC with Battery Backed | 665K |
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| 3 | ISL1221IUZ-T | Real Time Clock/Calendar with Event Detection and Frequency Output | 386K |
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| 4 | ISL1221IUZ-T | Low Power RTC with Battery Backed | 665K |
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