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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F745VG датащи(PDF) 142 Page - STMicroelectronics |
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STM32F745VG датащи(HTML) 142 Page - STMicroelectronics |
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142 / 227 page  Electrical characteristics STM32F745xx STM32F746xx 142/227 DocID027590 Rev 4 Input/output AC characteristics The definition and values of input/output AC characteristics are given in Figure 39 and Table 58, respectively. Unless otherwise specified, the parameters given in Table 58 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 17. Table 58. I/O AC characteristics(1)(2) OSPEEDRy [1:0] bit value(1) Symbol Parameter Conditions Min Typ Max Unit 00 fmax(IO)out Maximum frequency(3) CL = 50 pF, VDD ≥ 2.7 V - - 4 MHz CL = 50 pF, VDD ≥ 1.7 V - - 2 CL = 10 pF, VDD ≥ 2.7 V - - 8 CL = 10 pF, VDD ≥ 1.8 V - - 4 CL = 10 pF, VDD ≥ 1.7 V - - 3 tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 50 pF, VDD = 1.7 V to 3.6 V -- 100 ns 01 fmax(IO)out Maximum frequency(3) CL = 50 pF, VDD≥ 2.7 V - - 25 MHz CL = 50 pF, VDD≥ 1.8 V - - 12.5 CL = 50 pF, VDD≥ 1.7 V - - 10 CL = 10 pF, VDD ≥ 2.7 V - - 50 CL = 10 pF, VDD≥ 1.8 V - - 20 CL = 10 pF, VDD≥ 1.7 V - - 12.5 tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 50 pF, VDD ≥ 2.7 V - - 10 ns CL = 10 pF, VDD ≥ 2.7 V - - 6 CL = 50 pF, VDD ≥ 1.7 V - - 20 CL = 10 pF, VDD ≥ 1.7 V - - 10 10 fmax(IO)out Maximum frequency(3) CL = 40 pF, VDD ≥ 2.7 V - - 50(4) MHz CL = 10 pF, VDD ≥ 2.7 V - - 100(4) CL = 40 pF, VDD ≥ 1.7 V - - 25 CL = 10 pF, VDD ≥ 1.8 V - - 50 CL = 10 pF, VDD ≥ 1.7 V - - 42.5 tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 40 pF, VDD ≥2.7 V - - 6 ns CL = 10 pF, VDD ≥ 2.7 V - - 4 CL = 40 pF, VDD ≥ 1.7 V - - 10 CL = 10 pF, VDD ≥ 1.7 V - - 6 |
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