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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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AM186 Arkusz danych(PDF) 92 Page - Advanced Micro Devices |
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AM186 Arkusz danych(HTML) 92 Page - Advanced Micro Devices |
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92 / 112 page  92 Am186TMER and Am188TMER Microcontrollers Data Sheet DRAF T Switching Characteristics over Commercial and Industrial Operating Ranges Clock (25 MHz) Notes: All timing parameters are measured at VCC/2 with 50 pF loading on CLKOUTA, unless otherwise noted. All output test conditions are with CL=50 pF. For switching tests, VIL=0.3 V and VIH =VCC–0.3 V. a The specifications for CLKIN are applicable to the Divide by Two and Times One modes. The Times One mode should be used for operations from 16 MHz to 20 MHz. The Times Four mode should be used for operations above 20 MHz. Preliminary Parameter 25 MHz No. Symbol Description Min Max Unit CLKIN Requirements for Times One Mode 36 tCKIN X1 Period(a) 40 60 ns 37 tCLCK X1 Low Time (1.5 V)(a) 15 ns 38 tCHCK X1 High Time (1.5 V)(a) 15 ns 39 tCKHL X1 Fall Time (3.5 to 1.0 V)(a) 5 ns 40 tCKLH X1 Rise Time (1.0 to 3.5 V)(a) 5 ns CLKIN Requirements for Divide by Two Mode 36 tCKIN X1 Period(a) 20 33 ns 37 tCLCK X1 Low Time (1.5 V)(a) 10 ns 38 tCHCK X1 High Time (1.5 V)(a) 10 ns 39 tCKHL X1 Fall Time (3.5 to 1.0 V)(a) 5 ns 40 tCKLH X1 Rise Time (1.0 to 3.5 V)(a) 5 ns CLKOUT Timing 42 tCLCL CLKOUTA Period 40 ns 43 tCLCH CLKOUTA Low Time (CL=50 pF) 0.5tCLCL–2=18 ns 44 tCHCL CLKOUTA High Time (CL=50 pF) 0.5tCLCL–2=18 ns 45 tCH1CH2 CLKOUTA Rise Time (1.0 to 3.5 V) 3 ns 46 tCL2CL1 CLKOUTA Fall Time (3.5 to 1.0 V) 3 ns 61 tLOCK Maximum PLL Lock Time 1 ms 69 tCICOA X1 to CLKOUTA Skew 20 ns 70 tCICOB X1 to CLKOUTB Skew 34 ns |
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