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74F825 Scheda tecnica(PDF) 11 Page - NXP Semiconductors |
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74F825 Scheda tecnica(HTML) 11 Page - NXP Semiconductors |
11 / 18 page Philips Semiconductors Product specification 74F821/822/823/824/825/826 Bus interface registers 1996 Jan 05 11 AC ELECTRICAL CHARACTERISTICS FOR 74F821/74F822/74F824/74F825/74F826 LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = +25°C VCC = +5.0V CL = 50pF, RL = 500Ω Tamb = 0°C to +70°C VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω UNIT MIN TYP MAX MIN MAX fmax Maximum clock frequency Waveform 1 150 180 140 ns tPLH tPHL Propagation delay CP to Qn or Qn 74F821, 74F825, 74F826 Waveform 1 4.0 4.0 6.5 6.0 8.5 8.5 4.0 3.5 9.5 9.0 ns tPLH tPHL Propagation delay CP to Qn 74F822, 74F824 Waveform 1 4.5 4.5 6.5 6.5 9.0 9.0 4.5 4.5 10.0 9.0 ns tPHL Propagation delay MR to Qn or Qn 74F824 74F825, 74F826 Waveform 2 3.0 5.0 8.0 3.0 8.0 ns tPZH tPZL Output enable time OEn to Qn or Qn Waveform 4 Waveform 5 2.0 3.0 4.5 5.0 8.0 8.0 2.0 2.5 9.0 9.0 ns tPHZ tPLZ Output disable time OEn to Qn or Qn Waveform 4 Waveform 5 1.5 1.5 3.5 3.5 6.5 6.5 1.5 1.5 7.5 7.5 ns AC SETUP REQUIREMENTS FOR 74F821/74F822/74F824/74F825/74F826 LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = +25°C VCC = +5.0V CL = 50pF, RL = 500Ω Tamb = 0°C to +70°C VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω UNIT MIN TYP MAX MIN MAX tsu (H) tsu (L) Setup time, high or low Dn to CP Waveform 3 1.0 1.0 1.0 1.0 ns th (H) th (L) Hold time, high or low Dn to CP Waveform 3 2.0 2.0 2.0 2.0 ns tw (H) tw (L) CP Pulse width, high or low Waveform 1 3.5 3.5 4.0 4.0 ns tsu (H) tsu (L) Setup time, high or low, CE to CP Waveform 3 0.0 2.0 0.0 2.0 ns th (H) th (L) Hold time, high or low CE to CP 74F824, 74F825, 74F826 Waveform 3 0.0 3.0 0.0 3.5 ns tw (L) MR Pulse width, low 74F826 Waveform 2 4.5 4.5 ns trec Recovery time, MR to CP Waveform 2 2.5 2.5 ns |
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