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ST7260 数据表(PDF) 91 Page - STMicroelectronics |
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ST7260 数据表(HTML) 91 Page - STMicroelectronics |
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91 / 117 page  ST7260 91/117 CLOCK AND TIMING CHARACTERISTICS (Cont’d) 13.5.3 External Clock Source Note: 1. Data based on design simulation and/or technology characteristics, not tested in production. Figure 45. Typical Application with an External Clock Source Figure 46. Typical Application with a Crystal Resonator Symbol Parameter Conditions Min Typ Max Unit VOSCINH OSCIN input pin high level voltage see Figure 45 0.7xVDD VDD V VOSCINL OSCIN input pin low level voltage VSS 0.3xVDD tw(OSCINH) tw(OSCINL) OSCIN high or low time 1) 15 ns tr(OSCIN) tf(OSCIN) OSCIN rise or fall time1) 15 IL OSCx Input leakage current VSS≤VIN≤VDD ±1 µA OSCIN OSCOUT fOSC EXTERNAL ST72XXX CLOCK SOURCE Not connected internally VOSCINL VOSCINH tr(OSCIN) tf(OSCIN) tw(OSCINH) tw(OSCINL) IL 90% 10% OSCOUT OSCIN fOSC CL1 CL2 i2 RF ST72XXX RESONATOR |
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