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MC145151P2 Datasheet(PDF) 26 Page - Motorola, Inc |
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MC145151P2 Datasheet(HTML) 26 Page - Motorola, Inc |
26 / 36 page MC145151–2 through MC145158–2 MOTOROLA 26 TIMING REQUIREMENTS (Input tr = tf = 10 ns unless otherwise indicated) Symbol Parameter VDD V Guaranteed Limit 25 °C Guaranteed Limit – 40 to 85 °C Unit fclk Serial Data Clock Frequency, Assuming 25% Duty Cycle NOTE: Refer to CLK tw(H) below (Figure 6) 3 5 9 dc to 5.0 dc to 7.1 dc to 10 dc to 3.5 dc to 7.1 dc to 10 MHz tsu Minimum Setup Time, Data to CLK (Figure 7) 3 5 9 30 20 18 30 20 18 ns th Minimum Hold Time, CLK to Data (Figure 7) 3 5 9 40 20 15 40 20 15 ns tsu Minimum Setup Time, CLK to ENB (Figure 7) 3 5 9 70 32 25 70 32 25 ns trec Minimum Recovery Time, ENB to CLK (Figure 7) 3 5 9 5 10 20 5 10 20 ns tw(H) Minimum Pulse Width, CLK and ENB (Figure 6) 3 5 9 50 35 25 70 35 25 ns tr, tf Maximum Input Rise and Fall Times — Any Input (Figure 8) 3 5 9 5 4 2 5 4 2 µs SWITCHING WAVEFORMS Figure 6. Figure 7. VSS — VDD 50% 50% LAST CLK PREVIOUS DATA LATCHED FIRST CLK ENB CLK DATA 50% — VDD VSS — VDD VSS — VDD VSS tsu tsu trec th 50% CLK, ENB tw(H) — VDD VSS 4 fclk 1 * *Assumes 25% Duty Cycle. tt 90% 10% tf ANY OUTPUT Figure 8. |
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