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HT47R20 Datasheet(PDF) 6 Page - Holtek Semiconductor Inc |
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HT47R20 Datasheet(HTML) 6 Page - Holtek Semiconductor Inc |
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6 / 42 page  HT47R20 Rev. 1.10 6 2002-07-25 交流电气特性 Ta=25 测试条件 符号 参数 VDD 条件 最小 典型 最大 单位 3V 400 4000 kHz fSYS1 系统时钟 (晶体振荡) 5V 400 8000 kHz 3V 400 4000 kHz fSYS2 系统时钟 (RC 振荡) 5V 400 8000 kHz fSYS3 系统时钟 (32768Hz 晶体振 荡 ) 32768 Hz fRTCOSC RTC 频率 32768 Hz 3V 0 — 4000 kHz fTIMER 定时器输入频率 (TMR) 5V 0 8000 kHz 3V 45 90 180 µs tWDTOSC 看门狗振荡器 5V 35 65 130 µs tRES 外部复位低电平脉宽 — 1 — — µs tSST 系统启动延迟时间 — 从 HALT 状态唤醒 — 1024 — tSYS tINT 中断脉冲宽度 — 1 — — µs |
Similar Part No. - HT47R20 |
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Similar Description - HT47R20 |
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