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HEF4021B Datasheet(PDF) 5 Page - NXP Semiconductors |
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HEF4021B Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 6 page January 1995 5 Philips Semiconductors Product specification 8-bit static shift register HEF4021B MSI AC CHARACTERISTICS VSS = 0 V; Tamb =25 °C; CL = 50 pF; input transition times ≤ 20 ns VDD V SYMBOL MIN. TYP. MAX. Set-up time 5 25 −15 ns see also waveforms Figs 4 and 5 DS → CP 10 tsu 25 −10 ns 15 15 −5ns 550 25 ns Pn → PL 10 tsu 30 10 ns 15 20 5 ns Hold times 5 40 20 ns DS → CP 10 thold 20 10 ns 15 15 8 ns 515 −10 ns Pn → PL 10 thold 15 0 ns 15 15 0 ns Minimum clock 5 70 35 ns pulse width; LOW 10 tWCPL 30 15 ns 15 24 12 ns Minimum PL 5 70 35 ns pulse width; HIGH 10 tWPLH 30 15 ns 15 24 12 ns Recovery time 5 50 10 ns for PL 10 tRPL 40 5 ns 15 35 5 ns Maximum clock 5 6 13 MHz pulse frequency 10 fmax 15 30 MHz 15 20 40 MHz VDD V TYPICAL FORMULA FOR P ( µW) Dynamic power 5 900 fi +∑ (foCL) × VDD2 where dissipation per 10 4 300 fi +∑ (foCL) × VDD2 fi = input freq. (MHz) package (P) 15 12 000 fi +∑ (foCL) × VDD2 fo = output freq. (MHz) CL = load capacitance (pF) ∑ (f oCL) = sum of outputs VDD = supply voltage (V) |
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