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7HCT1284D Datasheet(PDF) 5 Page - NXP Semiconductors |
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7HCT1284D Datasheet(HTML) 5 Page - NXP Semiconductors |
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5 / 12 page  Philips Semiconductors Product specification 74HCT1284 Parallel printer interface transceiver/buffer 1998 Jul 10 5 AC CHARACTERISTICS GND = 0V, tR = tF = 3.0ns, CL = 50pF, RL = 500Ω LIMITS SYMBOL PARAMETER WAVEFORM Tamb = 25°C VCC = 5.0V Tamb = 0 to + 70°C VCC = Min to Max UNIT MIN TYP MAX MIN MAX SR B-Side Slew Rate 0.05 0.11 0.4 0.05 0.4 V/ns tPLH tPHL Propagation delay A toY or A to B 2 5.0 5.0 13.9 21.0 17.1 25.7 5.0 5.0 22 31 ns tPLH tPHL Propagation delay B to A 1 1.5 1.5 5.3 5.6 7.5 7.9 1.5 1.5 9.0 10.0 ns tPZH tPHZ Output enable/disable time to/from High level HD to Y or HD to B 3 4.0 2.0 12.0 6.5 16.0 9.1 4.0 2.0 20.0 11.0 ns tPZL tPLZ Output enable/disable time to/from Low level A to Y or A to B 4 5.0 1.5 12.7 5.0 16.3 7.1 5.0 1.5 20.0 9.0 ns AC WAVEFORMS For all waveforms, VM = 1.5V. Bn Input VM tPLH tPHL A1 – A4 Output 50% VCC VM VOH VOL 50% VCC SK00003 Waveform 1. Propagation Delay for Bn to A1–A4 An Input VM tPLH tPHL Bn or Yn Output VM VOH–1.4V VOH VOL VOH–1.4V SK00004 Waveform 2. Propagation Delay for An to Bn or Yn Outputs HD Inputs VM tPZH tPHZ 0V VOH–0.3V Bn or Yn Output VM VM VOH SK00005 Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level An Input tPZL tPLZ VOL +0.3V Bn or Yn Output VM VM VM VOL SK00006 Waveform 4. 3-State Output enable Time to Low Level and Output disable Time from Low Level |
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