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STRT71XF 数据表(PDF) 41 Page - STMicroelectronics |
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STRT71XF 数据表(HTML) 41 Page - STMicroelectronics |
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41 / 74 page ![]() STR71xF Electrical parameters 41/74 Notes: 1. Data based on design simulation and/or technology characteristics, not tested in production. Table 18. RTCXT1 External Clock Characteristics Symbol Parameter Conditions Min Typ Max Unit fRTCXT1 External clock source frequency 0 500 kHz VRTCXT1H RTCXT1 input pin high level voltage 0.7xV33 V33 V VRTCXT1L RTCXT1 input pin low level voltage VSS 0.3xV33 tw(RTCXT1) tw(RTCXT1) RTCXT1 high or low time 1) 100 ns tr(RTCXT1) tf(RTCXT1) RTCXT1 rise or fall time 1) 5 IL RTCXT1 Input leakage current VSS≤VIN≤V33 ±1 µA |
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