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PT7C4311WE 数据表(PDF) 5 Page - Pericom Semiconductor Corporation |
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PT7C4311WE 数据表(HTML) 5 Page - Pericom Semiconductor Corporation |
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5 / 16 page ![]() ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2015-06-0002 PT0322-8 06/16/15 5 PT7C4311 Real-time Clock Module (I 2C Bus) AC Electrical Characteristics Sym Description Value Unit VHM Rising and falling threshold voltage high 0.8 VCC V VHL Rising and falling threshold voltage low 0.2 VCC V Over the operating range Symbol Item STAND Mode (I 2C) FAST Mode (I 2C) Unit Min. Max. Min. Max. fSCL SCL clock frequency - 100 - 400 kHz tSU;STA START condition set-up time 4.7 - 0.6 - s tHD;STA START condition hold time 4.0 - 0.6 - s tSU;DAT Data set-up time (RTC read/write) 250 - 100 - ns tHD;DAT Data hold time (RTC read/write) 0 - 0 0.9 us tSU;STO STOP condition setup time 4.0 - 0.6 - s tBUF Bus idle time between a START and STOP condition 4.7 - 1.3 - s tLOW When SCL = "L" 4.7 - 1.3 - s tHIGH When SCL = "H" 4.0 - 0.6 - s tr Rise time for SCL and SDA - 1.0 20+0.1CB 0.3 s tf Fall time for SCL and SDA - 0.3 20+0.1CB 0.3 s CB Capacitance load for each bus line 0 400 0 400 pF Timing Diagram Signal tf tr VHM VLM S Sr P t HD;STA t SP t SU;DAT t HD;STA t HD;DAT t SU;STA t SU;STO SCL SDA t BUF t HD;STA t SU;STA f SCL t LOW t HIGH Sr S P Start condition Restart condition Stop condition |
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