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MC14489BDWR2 Scheda tecnica(PDF) 4 Page - Motorola, Inc |
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MC14489BDWR2 Scheda tecnica(HTML) 4 Page - Motorola, Inc |
4 / 22 page MC14489B MOTOROLA 4 AC ELECTRICAL CHARACTERISTICS (TJ = – 40° to 130°C*, CL = 50 pF, Input tr = tf = 10 ns) Symbol Parameter VDD V Guaranteed Limit Unit fclk Serial Data Clock Frequency, Single Device or Cascaded Devices NOTE: Refer to Clock tw below (Figure 1) 3.0 4.5 5.5 dc to 3.0 dc to 4.0 dc to 4.0 MHz tPLH, tPHL Maximum Propagation Delay, Clock to Data Out (Figures 1 and 5) 3.0 4.5 5.5 140 80 80 ns tTLH, tTHL Maximum Output Transistion Time, Data Out (Figures 1 and 5) 3.0 4.5 5.5 70 50 50 ns fR Refresh Rate — Bank 1 through Bank 5 (Figures 2 and 6) 3.0 4.5 5.5 NA 700 to 1900 700 to 1900 Hz Cin Maximum Input Capacitance — Data In, Clock, Enable — 10 pF * See Thermal Considerations section. TIMING REQUIREMENTS (TJ = – 40° to 130°C*, Input tr = tf = 10 ns unless otherwise indicated) Symbol Parameter VDD V Guaranteed Limit Unit tsu, th Minimum Setup and Hold Times, Data In versus Clock (Figure 3) 3.0 4.5 5.5 50 40 40 ns tsu, th, trec Minimum Setup, Hold, ** and Recovery Times, Enable versus Clock (Figure 4) 3.0 4.5 5.5 150 100 100 ns tw(L) Minimum Active–Low Pulse Width, Enable (Figure 4) 3.0 4.5 5.5 4.5 3.4 3.4 µs tw(H) Minimum Inactive–High Pulse Width, Enable (Figure 4) 3.0 4.5 5.5 300 150 150 ns tw Minimum Pulse Width, Clock (Figure 1) 3.0 4.5 5.5 167 125 125 ns tr, tf Maximum Input Rise and Fall Times — Data In, Clock, Enable (Figure 1) 3.0 4.5 5.5 1 1 1 ms * See Thermal Considerations section. ** For a high–speed 8–Clock access, th for Enable is determined as follows: VDD = 3 to 4.5 V, fclk > 1.78 MHz: th = 4350 – (7500/fclk) VDD = 4.5 to 5.5 V, f clk > 2.34 MHz: th = 3300 – (7500/fclk) where th is in ns and fclk is in MHz. NOTES: 1. This restriction does NOT apply for fclk rates less than those listed above. For “slow” fclk rates, use the th limits in the above table. 2. This restriction does NOT apply for an access involving more than 8 Clocks. For > 8 Clocks, use the th limits in the above table. |
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