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HEF4521B Datasheet(PDF) 6 Page - NXP Semiconductors |
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HEF4521B Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 11 page  January 1995 6 Philips Semiconductors Product specification 24-stage frequency divider and oscillator HEF4521B MSI AC CHARACTERISTICS VSS = 0 V; Tamb =25 °C; CL = 50 pF; input transition times ≤ 20 ns Output transition times 5 60 120 ns 10 ns + (1,0 ns/pF) CL HIGH to LOW 10 tTHL 30 60 ns 9 ns + (0,42 ns/pF) CL 15 20 40 ns 6 ns + (0,28 ns/pF) CL 5 60 120 ns 10 ns + (1,0 ns/pF) CL LOW to HIGH 10 tTLH 30 60 ns 9 ns + (0,42 ns/pF) CL 15 20 40 ns 6 ns + (0,28 ns/pF) CL VDD V SYMBOL MIN. TYP. MAX. Minimum I2 pulse 5 80 40 ns see also waveforms Fig.5 width; HIGH 10 tWI2H 40 20 ns 15 30 15 ns Minimum MR 5 70 35 ns pulse width; HIGH 10 tWMRH 40 20 ns 15 30 15 ns Recovery time 5 20 −10 ns for MR 10 tRMR 15 −5ns 15 15 0 ns Maximum clock 5 6 12 MHz pulse frequency 10 fmax 12 25 MHz 15 17 35 MHz VDD V TYPICAL FORMULA FOR P ( µW) Dynamic power 5 1 200 fi +∑ (foCL) × VDD2 where dissipation per 10 5 100 fi +∑ (foCL) × VDD2 fi = input freq. (MHz) package (P) 15 13 050 fi +∑ (foCL) × VDD2 fo = output freq. (MHz) CL = load capacitance (pF) ∑ (f oCL) = sum of outputs VDD = supply voltage (V) VDD V SYMBOL MIN. TYP. MAX. TYPICAL EXTRAPOLATION FORMULA |
Similar Part No. - HEF4521B |
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Similar Description - HEF4521B |
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